二进制安装Kubernetes（k8s） v1.27.3 IPv4/IPv6双栈 可脱离互联网
https://github.com/cby-chen/Kubernetes 开源不易，帮忙点个star，谢谢了
介绍
kubernetes（k8s）二进制高可用安装部署，支持IPv4+IPv6双栈。
我使用IPV6的目的是在公网进行访问，所以我配置了IPV6静态地址。
若您没有IPV6环境，或者不想使用IPv6，不对主机进行配置IPv6地址即可。
不配置IPV6，不影响后续，不过集群依旧是支持IPv6的。为后期留有扩展可能性。
若不要IPv6 ，不给网卡配置IPv6即可，不要对IPv6相关配置删除或操作，否则会出问题。
强烈建议在Github上查看文档 ！！！
Github出问题会更新文档，并且后续尽可能第一时间更新新版本文档 ！！！
手动项目地址：https://github.com/cby-chen/Kubernetes
1.环境
主机名称 | IP地址 | 说明 | 软件 |
|---|---|---|---|
192.168.1.60 | 外网节点 | 下载各种所需安装包 | |
Master01 | 192.168.0.31 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx |
Master02 | 192.168.0.32 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx |
Master03 | 192.168.0.33 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx |
Node01 | 192.168.0.34 | node节点 | kubelet、kube-proxy、nfs-client、nginx |
Node02 | 192.168.0.35 | node节点 | kubelet、kube-proxy、nfs-client、nginx |
192.168.0.36 | VIP |
网段
物理主机：192.168.0.0/24
service：10.96.0.0/12
pod：172.16.0.0/12
安装包已经整理好：https://github.com/cby-chen/Kubernetes/releases/download/v1.27.3/kubernetes-v1.27.3.tar
1.1.k8s基础系统环境配置
1.2.配置IP
# 注意！ # 若虚拟机是进行克隆的那么网卡的UUID会重复 # 若UUID重复需要重新生成新的UUID # UUID重复无法获取到IPV6地址 # # 查看当前的网卡列表和 UUID： # nmcli con show # 删除要更改 UUID 的网络连接： # nmcli con delete uuid <原 UUID> # 重新生成 UUID： # nmcli con add type ethernet ifname <接口名称> con-name <新名称> # 重新启用网络连接： # nmcli con up <新名称>更改网卡的UUID
ssh root@192.168.0.31 "nmcli con delete uuid 708a1497-2192-43a5-9f03-2ab936fb3c44;nmcli con add type ethernet ifname eth0 con-name eth0;nmcli con up eth0"
ssh root@192.168.0.32 "nmcli con delete uuid 708a1497-2192-43a5-9f03-2ab936fb3c44;nmcli con add type ethernet ifname eth0 con-name eth0;nmcli con up eth0"
ssh root@192.168.0.33 "nmcli con delete uuid 708a1497-2192-43a5-9f03-2ab936fb3c44;nmcli con add type ethernet ifname eth0 con-name eth0;nmcli con up eth0"
ssh root@192.168.0.34 "nmcli con delete uuid 708a1497-2192-43a5-9f03-2ab936fb3c44;nmcli con add type ethernet ifname eth0 con-name eth0;nmcli con up eth0"
ssh root@192.168.0.35 "nmcli con delete uuid 708a1497-2192-43a5-9f03-2ab936fb3c44;nmcli con add type ethernet ifname eth0 con-name eth0;nmcli con up eth0"修改静态的IPv4地址
ssh root@192.168.0.154 "nmcli con mod eth0 ipv4.addresses 192.168.0.31/24; nmcli con mod eth0 ipv4.gateway 192.168.0.1; nmcli con mod eth0 ipv4.method manual; nmcli con mod eth0 ipv4.dns "8.8.8.8"; nmcli con up eth0"
ssh root@192.168.0.156 "nmcli con mod eth0 ipv4.addresses 192.168.0.32/24; nmcli con mod eth0 ipv4.gateway 192.168.0.1; nmcli con mod eth0 ipv4.method manual; nmcli con mod eth0 ipv4.dns "8.8.8.8"; nmcli con up eth0"
ssh root@192.168.0.164 "nmcli con mod eth0 ipv4.addresses 192.168.0.33/24; nmcli con mod eth0 ipv4.gateway 192.168.0.1; nmcli con mod eth0 ipv4.method manual; nmcli con mod eth0 ipv4.dns "8.8.8.8"; nmcli con up eth0"
ssh root@192.168.0.166 "nmcli con mod eth0 ipv4.addresses 192.168.0.34/24; nmcli con mod eth0 ipv4.gateway 192.168.0.1; nmcli con mod eth0 ipv4.method manual; nmcli con mod eth0 ipv4.dns "8.8.8.8"; nmcli con up eth0"
ssh root@192.168.0.167 "nmcli con mod eth0 ipv4.addresses 192.168.0.35/24; nmcli con mod eth0 ipv4.gateway 192.168.0.1; nmcli con mod eth0 ipv4.method manual; nmcli con mod eth0 ipv4.dns "8.8.8.8"; nmcli con up eth0"没有IPv6选择不配置即可
ssh root@192.168.0.31 "nmcli con mod eth0 ipv6.addresses fc00:43f4:1eea:1::10; nmcli con mod eth0 ipv6.gateway fc00:43f4:1eea:1::1; nmcli con mod eth0 ipv6.method manual; nmcli con mod eth0 ipv6.dns "2400:3200::1"; nmcli con up eth0"
ssh root@192.168.0.32 "nmcli con mod eth0 ipv6.addresses fc00:43f4:1eea:1::20; nmcli con mod eth0 ipv6.gateway fc00:43f4:1eea:1::1; nmcli con mod eth0 ipv6.method manual; nmcli con mod eth0 ipv6.dns "2400:3200::1"; nmcli con up eth0"
ssh root@192.168.0.33 "nmcli con mod eth0 ipv6.addresses fc00:43f4:1eea:1::30; nmcli con mod eth0 ipv6.gateway fc00:43f4:1eea:1::1; nmcli con mod eth0 ipv6.method manual; nmcli con mod eth0 ipv6.dns "2400:3200::1"; nmcli con up eth0"
ssh root@192.168.0.34 "nmcli con mod eth0 ipv6.addresses fc00:43f4:1eea:1::40; nmcli con mod eth0 ipv6.gateway fc00:43f4:1eea:1::1; nmcli con mod eth0 ipv6.method manual; nmcli con mod eth0 ipv6.dns "2400:3200::1"; nmcli con up eth0"
ssh root@192.168.0.35 "nmcli con mod eth0 ipv6.addresses fc00:43f4:1eea:1::50; nmcli con mod eth0 ipv6.gateway fc00:43f4:1eea:1::1; nmcli con mod eth0 ipv6.method manual; nmcli con mod eth0 ipv6.dns "2400:3200::1"; nmcli con up eth0"查看网卡配置
nmcli device show eth0
nmcli con show eth0
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=no
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
UUID=424fd260-c480-4899-97e6-6fc9722031e8
DEVICE=eth0
ONBOOT=yes
IPADDR=192.168.0.31
PREFIX=24
GATEWAY=192.168.8.1
DNS1=8.8.8.8
IPV6ADDR=fc00:43f4:1eea:1::10/128
IPV6_DEFAULTGW=fc00:43f4:1eea:1::1
DNS2=2400:3200::1
[root@localhost ~]#
1.3.设置主机名
hostnamectl set-hostname k8s-master01
hostnamectl set-hostname k8s-master02
hostnamectl set-hostname k8s-master03
hostnamectl set-hostname k8s-node01
hostnamectl set-hostname k8s-node02
1.4.配置yum源
# 其他系统的源地址https://mirrors.tuna.tsinghua.edu.cn/help/
对于 Ubuntu
sed -i 's/cn.archive.ubuntu.com/mirrors.ustc.edu.cn/g' /etc/apt/sources.list
对于 CentOS 7
sudo sed -e 's|^mirrorlist=|#mirrorlist=|g'
-e 's|^#baseurl=http://mirror.centos.org/centos|baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos|g'
-i.bak
/etc/yum.repos.d/CentOS-*.repo对于 CentOS 8
sudo sed -e 's|^mirrorlist=|#mirrorlist=|g'
-e 's|^#baseurl=http://mirror.centos.org/$contentdir|baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos|g'
-i.bak
/etc/yum.repos.d/CentOS-*.repo对于私有仓库
sed -e 's|^mirrorlist=|#mirrorlist=|g' -e 's|^#baseurl=http://mirror.centos.org/$contentdir|baseurl=http://192.168.1.123/centos|g' -i.bak /etc/yum.repos.d/CentOS-*.repo
1.5.安装一些必备工具
# 对于 Ubuntu
apt update && apt upgrade -y && apt install -y wget psmisc vim net-tools nfs-kernel-server telnet lvm2 git tar curl对于 CentOS 7
yum update -y && yum -y install wget psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git tar curl
对于 CentOS 8
yum update -y && yum -y install wget psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git network-scripts tar curl
1.5.1 下载离线所需文件(可选)
在互联网服务器上安装一个一模一样的系统进行下载所需包
CentOS7
# 下载必要工具
yum -y install createrepo yum-utils wget epel*下载全量依赖包
repotrack createrepo wget psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git tar curl gcc keepalived haproxy bash-completion chrony sshpass ipvsadm ipset sysstat conntrack libseccomp
删除libseccomp
rm -rf libseccomp-*.rpm
下载libseccomp
wget http://rpmfind.net/linux/centos/8-stream/BaseOS/x86_64/os/Packages/libseccomp-2.5.1-1.el8.x86_64.rpm
创建yum源信息
createrepo -u -d /data/centos7/
拷贝包到内网机器上
scp -r /data/centos7/ root@192.168.0.31:
scp -r /data/centos7/ root@192.168.0.32:
scp -r /data/centos7/ root@192.168.0.33:
scp -r /data/centos7/ root@192.168.0.34:
scp -r /data/centos7/ root@192.168.0.35:在内网机器上创建repo配置文件
rm -rf /etc/yum.repos.d/*
cat > /etc/yum.repos.d/123.repo << EOF
[cby]
name=CentOS-$releasever - Media
baseurl=file:///root/centos7/
gpgcheck=0
enabled=1
EOF安装下载好的包
yum clean all
yum makecache
yum install /root/centos7/* --skip-broken -y备注
安装完成后，可能还会出现yum无法使用那么再次执行
rm -rf /etc/yum.repos.d/*
cat > /etc/yum.repos.d/123.repo << EOF
[cby]
name=CentOS-$releasever - Media
baseurl=file:///root/centos7/
gpgcheck=0
enabled=1
EOF
yum clean all
yum makecache
yum install /root/centos7/* --skip-broken -y备注
安装 chrony 和 libseccomp
yum install /root/centos7/libseccomp-2.5.1*.rpm -y
yum install /root/centos7/chrony-*.rpm -y
CentOS8
# 下载必要工具
yum -y install createrepo yum-utils wget epel*下载全量依赖包
repotrack wget psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git network-scripts tar curl gcc keepalived haproxy bash-completion chrony sshpass ipvsadm ipset sysstat conntrack libseccomp
创建yum源信息
createrepo -u -d /data/centos8/
拷贝包到内网机器上
scp -r centos8/ root@192.168.0.31:
scp -r centos8/ root@192.168.0.32:
scp -r centos8/ root@192.168.0.33:
scp -r centos8/ root@192.168.0.34:
scp -r centos8/ root@192.168.0.35:在内网机器上创建repo配置文件
rm -rf /etc/yum.repos.d/*
cat > /etc/yum.repos.d/123.repo << EOF
[cby]
name=CentOS-$releasever - Media
baseurl=file:///root/centos8/
gpgcheck=0
enabled=1
EOF安装下载好的包
yum clean all
yum makecache
yum install /root/centos8/* --skip-broken -y备注
安装完成后，可能还会出现yum无法使用那么再次执行
rm -rf /etc/yum.repos.d/*
cat > /etc/yum.repos.d/123.repo << EOF
[cby]
name=CentOS-$releasever - Media
baseurl=file:///root/centos8/
gpgcheck=0
enabled=1
EOF
yum clean all
yum makecache
yum install /root/centos8/* --skip-broken -y
Ubuntu 下载包和依赖
#!/bin/bashlogfile=123.log
ret=""
function getDepends()
{
echo "fileName is" $1>>$logfileuse tr to del < >
ret=
apt-cache depends $1|grep Depends |cut -d: -f2 |tr -d "<>"
echo ret|tee -a logfile
}需要获取其所依赖包的包
libs="wget psmisc vim net-tools nfs-kernel-server telnet lvm2 git tar curl gcc keepalived haproxy bash-completion chrony sshpass ipvsadm ipset sysstat conntrack libseccomp"
download libs dependen. deep in 3
i=0
while [ $i -lt 3 ] ;
do
let i++
echo $i
# download libs
newlist=" "
for j in $libs
do
added="(getDepends j)"
newlist="newlist added"
apt install $added --reinstall -d -y
donelibs=$newlistdone
创建源信息
apt install dpkg-dev
sudo cp /var/cache/apt/archives/*.deb /data/ubuntu/ -r
dpkg-scanpackages . /dev/null |gzip > /data/ubuntu/Packages.gz -r拷贝包到内网机器上
scp -r ubuntu/ root@192.168.0.31:
scp -r ubuntu/ root@192.168.0.32:
scp -r ubuntu/ root@192.168.0.33:
scp -r ubuntu/ root@192.168.0.34:
scp -r ubuntu/ root@192.168.0.35:在内网机器上配置apt源
vim /etc/apt/sources.list
cat /etc/apt/sources.list
deb file:////root/ ubuntu/安装deb包
apt install ./*.deb
1.6.选择性下载需要工具
#!/bin/bash查看版本地址：
https://github.com/containernetworking/plugins/releases/
https://github.com/containerd/containerd/releases/
https://github.com/kubernetes-sigs/cri-tools/releases/
https://github.com/Mirantis/cri-dockerd/releases/
https://github.com/etcd-io/etcd/releases/
https://github.com/cloudflare/cfssl/releases/
https://github.com/kubernetes/kubernetes/tree/master/CHANGELOG
https://download.docker.com/linux/static/stable/x86_64/
https://github.com/opencontainers/runc/releases/
https://mirrors.tuna.tsinghua.edu.cn/elrepo/kernel/el7/x86_64/RPMS/
https://github.com/helm/helm/tags
http://nginx.org/download/
Version numbers
cni_plugins_version='v1.3.0'
cri_containerd_cni_version='1.7.2'
crictl_version='v1.27.0'
cri_dockerd_version='0.3.3'
etcd_version='v3.5.9'
cfssl_version='1.6.4'
kubernetes_server_version='1.27.3'
docker_version='24.0.2'
runc_version='1.1.7'
kernel_version='5.4.248'
helm_version='3.12.1'
nginx_version='1.25.1'URLs
base_url='https://ghproxy.com/https://github.com'
kernel_url="http://mirrors.tuna.tsinghua.edu.cn/elrepo/kernel/el7/x86_64/RPMS/kernel-lt-${kernel_version}-1.el7.elrepo.x86_64.rpm"
runc_url="{base_url}/opencontainers/runc/releases/download/v{runc_version}/runc.amd64"
docker_url="https://download.docker.com/linux/static/stable/x86_64/docker-${docker_version}.tgz"
cni_plugins_url="{base_url}/containernetworking/plugins/releases/download/{cni_plugins_version}/cni-plugins-linux-amd64-${cni_plugins_version}.tgz"
cri_containerd_cni_url="{base_url}/containerd/containerd/releases/download/v{cri_containerd_cni_version}/cri-containerd-cni-${cri_containerd_cni_version}-linux-amd64.tar.gz"
crictl_url="{base_url}/kubernetes-sigs/cri-tools/releases/download/{crictl_version}/crictl-${crictl_version}-linux-amd64.tar.gz"
cri_dockerd_url="{base_url}/Mirantis/cri-dockerd/releases/download/v{cri_dockerd_version}/cri-dockerd-${cri_dockerd_version}.amd64.tgz"
etcd_url="{base_url}/etcd-io/etcd/releases/download/{etcd_version}/etcd-${etcd_version}-linux-amd64.tar.gz"
cfssl_url="{base_url}/cloudflare/cfssl/releases/download/v{cfssl_version}/cfssl_${cfssl_version}linux_amd64"
cfssljson_url="{base_url}/cloudflare/cfssl/releases/download/v{cfssl_version}/cfssljson${cfssl_version}_linux_amd64"
helm_url="https://files.m.daocloud.io/get.helm.sh/helm-v${helm_version}-linux-amd64.tar.gz"
kubernetes_server_url="https://dl.k8s.io/v${kubernetes_server_version}/kubernetes-server-linux-amd64.tar.gz"
nginx_url="http://nginx.org/download/nginx-${nginx_version}.tar.gz"Download packages
packages=(
$kernel_url
$runc_url
$docker_url
$cni_plugins_url
$cri_containerd_cni_url
$crictl_url
$cri_dockerd_url
$etcd_url
$cfssl_url
$cfssljson_url
$helm_url
$kubernetes_server_url
$nginx_url
)
for package_url in "${packages[@]}"; do
filename=(basename "package_url")
if wget -cq --progress=bar:force:noscroll -nc "$package_url"; then
echo "Downloaded $filename"
else
echo "Failed to download $filename"
exit 1
fi
done
1.7.关闭防火墙
# Ubuntu忽略，CentOS执行
systemctl disable --now firewalld
1.8.关闭SELinux
# Ubuntu忽略，CentOS执行
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
1.9.关闭交换分区
sed -ri 's/.*swap.*/#&/' /etc/fstab
swapoff -a && sysctl -w vm.swappiness=0cat /etc/fstab
/dev/mapper/centos-swap swap swap defaults 0 0
1.10.网络配置（俩种方式二选一）
# Ubuntu忽略，CentOS执行方式一
systemctl disable --now NetworkManager
systemctl start network && systemctl enable network
方式二
cat > /etc/NetworkManager/conf.d/calico.conf << EOF
[keyfile]
unmanaged-devices=interface-name:cali*;interface-name:tunl*
EOF
systemctl restart NetworkManager
1.11.进行时间同步
# 服务端apt install chrony -y
yum install chrony -y
cat > /etc/chrony.conf << EOF
pool ntp.aliyun.com iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
allow 192.168.0.0/24
local stratum 10
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOFsystemctl restart chronyd ; systemctl enable chronyd
客户端
apt install chrony -y
yum install chrony -y
cat > /etc/chrony.conf << EOF
pool 192.168.0.31 iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOFsystemctl restart chronyd ; systemctl enable chronyd
#使用客户端进行验证
chronyc sources -v
1.12.配置ulimit
ulimit -SHn 65535
cat >> /etc/security/limits.conf <<EOF
- soft nofile 655360
- hard nofile 131072
- soft nproc 655350
- hard nproc 655350
- seft memlock unlimited
hard memlock unlimitedd
EOF
1.13.配置免密登录
# apt install -y sshpass
yum install -y sshpass
ssh-keygen -f /root/.ssh/id_rsa -P ''
export IP="192.168.0.31 192.168.0.32 192.168.0.33 192.168.0.34 192.168.0.35"
export SSHPASS=123123
for HOST in $IP;do
sshpass -e ssh-copy-id -o StrictHostKeyChecking=no $HOST
done
1.14.添加启用源
# Ubuntu忽略，CentOS执行为 RHEL-8或 CentOS-8配置源
yum install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm -y
sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo
sed -i "s@elrepo.org/linux@mirrors.tuna.tsinghua.edu.cn/elrepo@g" /etc/yum.repos.d/elrepo.repo为 RHEL-7 SL-7 或 CentOS-7 安装 ELRepo
yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm -y
sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo
sed -i "s@elrepo.org/linux@mirrors.tuna.tsinghua.edu.cn/elrepo@g" /etc/yum.repos.d/elrepo.repo查看可用安装包
yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
1.15.升级内核至4.18版本以上
# Ubuntu忽略，CentOS执行安装最新的内核
我这里选择的是稳定版kernel-ml 如需更新长期维护版本kernel-lt
yum -y --enablerepo=elrepo-kernel install kernel-ml
查看已安装那些内核
rpm -qa | grep kernel
查看默认内核
grubby --default-kernel
若不是最新的使用命令设置
grubby --set-default $(ls /boot/vmlinuz-* | grep elrepo)
重启生效
reboot
v8 整合命令为：
yum install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm -y ; sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo ; sed -i "s@elrepo.org/linux@mirrors.tuna.tsinghua.edu.cn/elrepo@g" /etc/yum.repos.d/elrepo.repo ; yum --disablerepo="*" --enablerepo="elrepo-kernel" list available -y ; yum --enablerepo=elrepo-kernel install kernel-lt -y ; grubby --default-kernel ; reboot
v7 整合命令为：
yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm -y ; sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo ; sed -i "s@elrepo.org/linux@mirrors.tuna.tsinghua.edu.cn/elrepo@g" /etc/yum.repos.d/elrepo.repo ; yum --disablerepo="" --enablerepo="elrepo-kernel" list available -y ; yum --enablerepo=elrepo-kernel install kernel-lt -y ; grubby --set-default $(ls /boot/vmlinuz- | grep elrepo) ; grubby --default-kernel ; reboot
离线版本
yum install -y /root/cby/kernel-lt--1.el7.elrepo.x86_64.rpm ; grubby --set-default $(ls /boot/vmlinuz- | grep elrepo) ; grubby --default-kernel ; reboot
1.16.安装ipvsadm
# 对于CentOS7离线安装yum install /root/centos7/ipset-.el7.x86_64.rpm /root/centos7/lm_sensors-libs-.el7.x86_64.rpm /root/centos7/ipset-libs-.el7.x86_64.rpm /root/centos7/sysstat-.el7_9.x86_64.rpm /root/centos7/ipvsadm-*.el7.x86_64.rpm -y
对于 Ubuntu
apt install ipvsadm ipset sysstat conntrack -y
对于 CentOS
yum install ipvsadm ipset sysstat conntrack libseccomp -y
cat >> /etc/modules-load.d/ipvs.conf <<EOF
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOFsystemctl restart systemd-modules-load.service
lsmod | grep -e ip_vs -e nf_conntrack
ip_vs_sh 16384 0
ip_vs_wrr 16384 0
ip_vs_rr 16384 0
ip_vs 180224 6 ip_vs_rr,ip_vs_sh,ip_vs_wrr
nf_conntrack 176128 1 ip_vs
nf_defrag_ipv6 24576 2 nf_conntrack,ip_vs
nf_defrag_ipv4 16384 1 nf_conntrack
libcrc32c 16384 3 nf_conntrack,xfs,ip_vs
1.17.修改内核参数
cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.all.forwarding = 1
EOF
sysctl --system
1.18.所有节点配置hosts本地解析
cat > /etc/hosts <<EOF
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.31 k8s-master01
192.168.0.32 k8s-master02
192.168.0.33 k8s-master03
192.168.0.34 k8s-node01
192.168.0.35 k8s-node02
192.168.0.36 lb-vip
EOF
2.k8s基本组件安装
注意 ：2.1 和 2.2 二选其一即可
2.1.安装Containerd作为Runtime （推荐）
# https://github.com/containernetworking/plugins/releases/wget https://ghproxy.com/https://github.com/containernetworking/plugins/releases/download/v1.3.0/cni-plugins-linux-amd64-v1.3.0.tgz
cd cby/
#创建cni插件所需目录
mkdir -p /etc/cni/net.d /opt/cni/bin
#解压cni二进制包
tar xf cni-plugins-linux-amd64-v*.tgz -C /opt/cni/bin/https://github.com/containerd/containerd/releases/
wget https://ghproxy.com/https://github.com/containerd/containerd/releases/download/v1.7.2/cri-containerd-cni-1.7.2-linux-amd64.tar.gz
#解压
tar -xzf cri-containerd-cni-*-linux-amd64.tar.gz -C /#创建服务启动文件
cat > /etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
TasksMax=infinity
OOMScoreAdjust=-999
[Install]
WantedBy=multi-user.target
EOF
2.1.1配置Containerd所需的模块
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF
2.1.2加载模块
systemctl restart systemd-modules-load.service
2.1.3配置Containerd所需的内核
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF加载内核
sysctl --system
2.1.4创建Containerd的配置文件
# 创建默认配置文件
mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml修改Containerd的配置文件
sed -i "s#SystemdCgroup\ =\ false#SystemdCgroup\ =\ true#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep SystemdCgroupsed -i "s#registry.k8s.io#m.daocloud.io/registry.k8s.io#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep sandbox_imagesed -i "s#config_path\ =\ ""#config_path\ =\ "/etc/containerd/certs.d"#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep certs.dmkdir /etc/containerd/certs.d/docker.io -pv
配置加速器
cat > /etc/containerd/certs.d/docker.io/hosts.toml << EOF
server = "https://docker.io"
[host."https://hub-mirror.c.163.com"]
capabilities = ["pull", "resolve"]
EOF
2.1.5启动并设置为开机启动
systemctl daemon-reload
systemctl enable --now containerd
systemctl restart containerd
2.1.6配置crictl客户端连接的运行时位置
# wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.24.2/crictl-v1.24.2-linux-amd64.tar.gz#解压
tar xf crictl-v*-linux-amd64.tar.gz -C /usr/bin/
#生成配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
#测试
systemctl restart containerd
crictl info
2.2 安装docker作为Runtime
2.2.1 安装docker
# 二进制包下载地址：https://download.docker.com/linux/static/stable/x86_64/wget https://download.docker.com/linux/static/stable/x86_64/docker-24.0.2.tgz
#解压
tar xf docker-.tgz
#拷贝二进制文件
cp docker/ /usr/bin/
#创建containerd的service文件,并且启动
cat >/etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=1048576
TasksMax=infinity
OOMScoreAdjust=-999[Install]
WantedBy=multi-user.target
EOF设置开机自启
systemctl enable --now containerd.service
#准备docker的service文件
cat > /etc/systemd/system/docker.service <<EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
Requires=docker.socket containerd.service[Service]
Type=notify
ExecStart=/usr/bin/dockerd -H --containerd=/run/containerd/containerd.sock
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
KillMode=process
OOMScoreAdjust=-500[Install]
WantedBy=multi-user.target
EOF#准备docker的socket文件
cat > /etc/systemd/system/docker.socket <<EOF
[Unit]
Description=Docker Socket for the API[Socket]
ListenStream=/var/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker[Install]
WantedBy=sockets.target
EOF#创建docker组
groupadd docker
#启动docker
systemctl enable --now docker.socket && systemctl enable --now docker.service
#验证
docker info配置加速器
mkdir /etc/docker/ -pv
cat >/etc/docker/daemon.json <<EOF
{
"exec-opts": ["native.cgroupdriver=systemd"],
"registry-mirrors": [
"https://docker.m.daocloud.io",
"https://docker.mirrors.ustc.edu.cn",
"http://hub-mirror.c.163.com"
],
"max-concurrent-downloads": 10,
"log-driver": "json-file",
"log-level": "warn",
"log-opts": {
"max-size": "10m",
"max-file": "3"
},
"data-root": "/var/lib/docker"
}
EOF
systemctl daemon-reload
systemctl stop docker
systemctl restart docker
2.2.2 安装cri-docker
# 由于1.24以及更高版本不支持docker所以安装cri-docker下载cri-docker
wget https://ghproxy.com/https://github.com/Mirantis/cri-dockerd/releases/download/v0.3.3/cri-dockerd-0.3.3.amd64.tgz
解压cri-docker
tar xvf cri-dockerd-*.amd64.tgz
cp -r cri-dockerd/ /usr/bin/
chmod +x /usr/bin/cri-dockerd/cri-dockerd写入启动配置文件
cat > /usr/lib/systemd/system/cri-docker.service <<EOF
[Unit]
Description=CRI Interface for Docker Application Container Engine
Documentation=https://docs.mirantis.com
After=network-online.target firewalld.service docker.service
Wants=network-online.target
Requires=cri-docker.socket[Service]
Type=notify
ExecStart=/usr/bin/cri-dockerd/cri-dockerd --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.7
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=alwaysStartLimitBurst=3
StartLimitInterval=60sLimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinityTasksMax=infinity
Delegate=yes
KillMode=process[Install]
WantedBy=multi-user.target
EOF写入socket配置文件
cat > /usr/lib/systemd/system/cri-docker.socket <<EOF
[Unit]
Description=CRI Docker Socket for the API
PartOf=cri-docker.service[Socket]
ListenStream=%t/cri-dockerd.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker[Install]
WantedBy=sockets.target
EOF进行启动cri-docker
systemctl daemon-reload
systemctl enable cri-docker --now
systemctl restart cri-docker
systemctl status cri-docker
2.3.k8s与etcd下载及安装（仅在master01操作）
2.3.1解压k8s安装包
# 下载安装包wget https://dl.k8s.io/v1.27.3/kubernetes-server-linux-amd64.tar.gz
wget https://github.com/etcd-io/etcd/releases/download/v3.5.9/etcd-v3.5.9-linux-amd64.tar.gz
解压k8s安装文件
cd cby
tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}解压etcd安装文件
tar -xf etcd*.tar.gz && mv etcd-/etcd /usr/local/bin/ && mv etcd-/etcdctl /usr/local/bin/
查看/usr/local/bin下内容
ls /usr/local/bin/
containerd crictl etcdctl kube-proxy
containerd-shim critest kube-apiserver kube-scheduler
containerd-shim-runc-v1 ctd-decoder kube-controller-manager
containerd-shim-runc-v2 ctr kubectl
containerd-stress etcd kubelet
2.3.2查看版本
[root@k8s-master01 ~]# kubelet --version
Kubernetes v1.27.3
[root@k8s-master01 ~]# etcdctl version
etcdctl version: 3.5.9
API version: 3.5
[root@k8s-master01 ~]#
2.3.3将组件发送至其他k8s节点
Master='k8s-master02 k8s-master03'
Work='k8s-node01 k8s-node02'拷贝master组件
for NODE in Master; do echo NODE; scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} NODE:/usr/local/bin/; scp /usr/local/bin/etcd* NODE:/usr/local/bin/; done
拷贝work组件
for NODE in Work; do scp /usr/local/bin/kube{let,-proxy} NODE:/usr/local/bin/ ; done
所有节点执行
mkdir -p /opt/cni/bin
2.3创建证书相关文件
3.相关证书生成
# master01节点下载证书生成工具wget "https://ghproxy.com/https://github.com/cloudflare/cfssl/releases/download/v1.6.4/cfssl_1.6.4_linux_amd64" -O /usr/local/bin/cfssl
wget "https://ghproxy.com/https://github.com/cloudflare/cfssl/releases/download/v1.6.4/cfssljson_1.6.4_linux_amd64" -O /usr/local/bin/cfssljson
软件包内有
cp cfssl_linux_amd64 /usr/local/bin/cfssl
cp cfssljson_linux_amd64 /usr/local/bin/cfssljson添加执行权限
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson
3.1.生成etcd证书
特别说明除外，以下操作在所有master节点操作
3.1.1所有master节点创建证书存放目录
mkdir /etc/etcd/ssl -p
3.1.2master01节点生成etcd证书
cd pki生成etcd证书和etcd证书的key（如果你觉得以后可能会扩容，可以在ip那多写几个预留出来）
若没有IPv6 可删除可保留
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
cfssl gencert
-ca=/etc/etcd/ssl/etcd-ca.pem
-ca-key=/etc/etcd/ssl/etcd-ca-key.pem
-config=ca-config.json
-hostname=127.0.0.1,k8s-master01,k8s-master02,k8s-master03,192.168.0.31,192.168.0.32,192.168.0.33,fc00:43f4:1eea:1::10,fc00:43f4:1eea:1::20,fc00:43f4:1eea:1::30,::1
-profile=kubernetes
etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
3.1.3将证书复制到其他节点
Master='k8s-master02 k8s-master03'
for NODE in Master; do ssh NODE "mkdir -p /etc/etcd/ssl"; for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do scp /etc/etcd/ssl/{FILE} NODE:/etc/etcd/ssl/${FILE}; done; done
3.2.生成k8s相关证书
特别说明除外，以下操作在所有master节点操作
3.2.1所有k8s节点创建证书存放目录
mkdir -p /etc/kubernetes/pki
3.2.2master01节点生成k8s证书
cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca生成一个根证书 ，多写了一些IP作为预留IP，为将来添加node做准备
10.96.0.1是service网段的第一个地址，需要计算，192.168.0.36为高可用vip地址
若没有IPv6 可删除可保留
cfssl gencert
-ca=/etc/kubernetes/pki/ca.pem
-ca-key=/etc/kubernetes/pki/ca-key.pem
-config=ca-config.json
-hostname=10.96.0.1,192.168.0.36,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,x.oiox.cn,k.oiox.cn,l.oiox.cn,o.oiox.cn,192.168.0.31,192.168.0.32,192.168.0.33,192.168.0.34,192.168.0.35,192.168.0.36,192.168.0.37,192.168.0.38,192.168.0.39,192.168.1.70,fc00:43f4:1eea:1::10,fc00:43f4:1eea:1::20,fc00:43f4:1eea:1::30,fc00:43f4:1eea:1::40,fc00:43f4:1eea:1::50,fc00:43f4:1eea:1::60,fc00:43f4:1eea:1::70,fc00:43f4:1eea:1::80,fc00:43f4:1eea:1::90,fc00:43f4:1eea:1::100,::1
-profile=kubernetes apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver
3.2.3生成apiserver聚合证书
cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca有一个警告，可以忽略
cfssl gencert
-ca=/etc/kubernetes/pki/front-proxy-ca.pem
-ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem
-config=ca-config.json
-profile=kubernetes front-proxy-client-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-client
3.2.4生成controller-manage的证书
在《5.高可用配置》选择使用那种高可用方案
若使用 haproxy、keepalived 那么为 --server=https://192.168.0.36
若使用 nginx方案，那么为 --server=https://127.0.0.1
cfssl gencert
-ca=/etc/kubernetes/pki/ca.pem
-ca-key=/etc/kubernetes/pki/ca-key.pem
-config=ca-config.json
-profile=kubernetes
manager-csr.json | cfssljson -bare /etc/kubernetes/pki/controller-manager设置一个集群项
在《5.高可用配置》选择使用那种高可用方案
若使用 haproxy、keepalived 那么为
--server=https://192.168.0.36:8443若使用 nginx方案，那么为
--server=https://127.0.0.1:8443kubectl config set-cluster kubernetes
--certificate-authority=/etc/kubernetes/pki/ca.pem
--embed-certs=true
--server=https://127.0.0.1
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig设置一个环境项，一个上下文
kubectl config set-context system:kube-controller-manager@kubernetes
--cluster=kubernetes
--user=system:kube-controller-manager
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig设置一个用户项
kubectl config set-credentials system:kube-controller-manager
--client-certificate=/etc/kubernetes/pki/controller-manager.pem
--client-key=/etc/kubernetes/pki/controller-manager-key.pem
--embed-certs=true
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig设置默认环境
kubectl config use-context system:kube-controller-manager@kubernetes
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfigcfssl gencert
-ca=/etc/kubernetes/pki/ca.pem
-ca-key=/etc/kubernetes/pki/ca-key.pem
-config=ca-config.json
-profile=kubernetes
scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler在《5.高可用配置》选择使用那种高可用方案
若使用 haproxy、keepalived 那么为
--server=https://192.168.0.36:8443若使用 nginx方案，那么为
--server=https://127.0.0.1:8443kubectl config set-cluster kubernetes
--certificate-authority=/etc/kubernetes/pki/ca.pem
--embed-certs=true
--server=https://127.0.0.1
--kubeconfig=/etc/kubernetes/scheduler.kubeconfigkubectl config set-credentials system:kube-scheduler
--client-certificate=/etc/kubernetes/pki/scheduler.pem
--client-key=/etc/kubernetes/pki/scheduler-key.pem
--embed-certs=true
--kubeconfig=/etc/kubernetes/scheduler.kubeconfigkubectl config set-context system:kube-scheduler@kubernetes
--cluster=kubernetes
--user=system:kube-scheduler
--kubeconfig=/etc/kubernetes/scheduler.kubeconfigkubectl config use-context system:kube-scheduler@kubernetes
--kubeconfig=/etc/kubernetes/scheduler.kubeconfigcfssl gencert
-ca=/etc/kubernetes/pki/ca.pem
-ca-key=/etc/kubernetes/pki/ca-key.pem
-config=ca-config.json
-profile=kubernetes
admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin在《5.高可用配置》选择使用那种高可用方案
若使用 haproxy、keepalived 那么为
--server=https://192.168.0.36:8443若使用 nginx方案，那么为
--server=https://127.0.0.1:8443kubectl config set-cluster kubernetes
--certificate-authority=/etc/kubernetes/pki/ca.pem
--embed-certs=true
--server=https://127.0.0.1
--kubeconfig=/etc/kubernetes/admin.kubeconfigkubectl config set-credentials kubernetes-admin
--client-certificate=/etc/kubernetes/pki/admin.pem
--client-key=/etc/kubernetes/pki/admin-key.pem
--embed-certs=true
--kubeconfig=/etc/kubernetes/admin.kubeconfigkubectl config set-context kubernetes-admin@kubernetes
--cluster=kubernetes
--user=kubernetes-admin
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig
3.2.5创建kube-proxy证书
在《5.高可用配置》选择使用那种高可用方案
若使用 haproxy、keepalived 那么为 --server=https://192.168.0.36
若使用 nginx方案，那么为 --server=https://127.0.0.1
cfssl gencert
-ca=/etc/kubernetes/pki/ca.pem
-ca-key=/etc/kubernetes/pki/ca-key.pem
-config=ca-config.json
-profile=kubernetes
kube-proxy-csr.json | cfssljson -bare /etc/kubernetes/pki/kube-proxy在《5.高可用配置》选择使用那种高可用方案
若使用 haproxy、keepalived 那么为
--server=https://192.168.0.36:8443若使用 nginx方案，那么为
--server=https://127.0.0.1:8443kubectl config set-cluster kubernetes
--certificate-authority=/etc/kubernetes/pki/ca.pem
--embed-certs=true
--server=https://127.0.0.1
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfigkubectl config set-credentials kube-proxy
--client-certificate=/etc/kubernetes/pki/kube-proxy.pem
--client-key=/etc/kubernetes/pki/kube-proxy-key.pem
--embed-certs=true
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfigkubectl config set-context kube-proxy@kubernetes
--cluster=kubernetes
--user=kube-proxy
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config use-context kube-proxy@kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
3.2.5创建ServiceAccount Key ——secret
openssl genrsa -out /etc/kubernetes/pki/sa.key 2048
openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub
3.2.6将证书发送到其他master节点
#其他节点创建目录mkdir /etc/kubernetes/pki/ -p
for NODE in k8s-master02 k8s-master03; do for FILE in (ls /etc/kubernetes/pki | grep -v etcd); do scp /etc/kubernetes/pki/{FILE} NODE:/etc/kubernetes/pki/{FILE}; done; for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do scp /etc/kubernetes/{FILE} NODE:/etc/kubernetes/${FILE}; done; done
3.2.7查看证书
ls /etc/kubernetes/pki/
admin.csr controller-manager.csr kube-proxy.csr
admin-key.pem controller-manager-key.pem kube-proxy-key.pem
admin.pem controller-manager.pem kube-proxy.pem
apiserver.csr front-proxy-ca.csr sa.key
apiserver-key.pem front-proxy-ca-key.pem sa.pub
apiserver.pem front-proxy-ca.pem scheduler.csr
ca.csr front-proxy-client.csr scheduler-key.pem
ca-key.pem front-proxy-client-key.pem scheduler.pem
ca.pem front-proxy-client.pem一共26个就对了
ls /etc/kubernetes/pki/ |wc -l
26
4.k8s系统组件配置
4.1.etcd配置
4.1.1master01配置
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master01'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.0.31'
listen-client-urls: 'https://192.168.0.31//127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.0.31'
advertise-client-urls: 'https://192.168.0.31'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.0.31//192.168.0.32:2380,k8s-master03=https://192.168.0.33:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
4.1.2master02配置
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master02'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.0.32'
listen-client-urls: 'https://192.168.0.32//127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.0.32'
advertise-client-urls: 'https://192.168.0.32'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.0.31//192.168.0.32:2380,k8s-master03=https://192.168.0.33:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
4.1.3master03配置
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master03'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.0.33'
listen-client-urls: 'https://192.168.0.33//127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.0.33'
advertise-client-urls: 'https://192.168.0.33'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.0.31//192.168.0.32:2380,k8s-master03=https://192.168.0.33:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
4.2.创建service（所有master节点操作）
4.2.1创建etcd.service并启动
cat > /usr/lib/systemd/system/etcd.service << EOF[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536[Install]
WantedBy=multi-user.target
Alias=etcd3.service
EOF
4.2.2创建etcd证书目录
mkdir /etc/kubernetes/pki/etcd
ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
systemctl daemon-reload
systemctl enable --now etcd
4.2.3查看etcd状态
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
export ETCDCTL_API=3
etcdctl --endpoints="192.168.0.33:2379,192.168.0.32:2379,192.168.0.31:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 192.168.0.33:2379 | 6ae2196f75cd6d95 | 3.5.9 | 20 kB | false | false | 2 | 9 | 9 | |
| 192.168.0.32:2379 | 46cbf93f7713a252 | 3.5.9 | 20 kB | false | false | 2 | 9 | 9 | |
| 192.168.0.31:2379 | ec6051ffc7487dd7 | 3.5.9 | 20 kB | true | false | 2 | 9 | 9 | |
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
5.高可用配置（在Master服务器上操作）
注意* 5.1.1 和5.1.2 二选一即可
选择使用那种高可用方案，同时可以俩种都选用，实现内外兼顾的效果，比如：
5.1 的 NGINX方案实现集群内的高可用
5.2 的 haproxy、keepalived 方案实现集群外访问
在《3.2.生成k8s相关证书》
若使用 nginx方案，那么为 --server=https://127.0.0.1
若使用 haproxy、keepalived 那么为 --server=https://192.168.0.36
5.1 NGINX高可用方案
5.1.1 进行编译
# 安装编译环境
yum install gcc -y下载解压nginx二进制文件
wget http://nginx.org/download/nginx-1.25.1.tar.gz
tar xvf nginx-.tar.gz
cd nginx-进行编译
./configure --with-stream --without-http --without-http_uwsgi_module --without-http_scgi_module --without-http_fastcgi_module
make && make install拷贝编译好的nginx
node='k8s-master02 k8s-master03 k8s-node01 k8s-node02'
for NODE in node; do scp -r /usr/local/nginx/ NODE:/usr/local/nginx/; done
5.1.2 写入启动配置
在所有主机上执行
# 写入nginx配置文件
cat > /usr/local/nginx/conf/kube-nginx.conf <<EOF
worker_processes 1;
events {
worker_connections 1024;
}
stream {
upstream backend {
least_conn;
hash $remote_addr consistent;
server 192.168.0.31:6443 max_fails=3 fail_timeout=30s;
server 192.168.0.32:6443 max_fails=3 fail_timeout=30s;
server 192.168.0.33:6443 max_fails=3 fail_timeout=30s;
}
server {
listen 127.0.0.1:8443;
proxy_connect_timeout 1s;
proxy_pass backend;
}
}
EOF写入启动配置文件
cat > /etc/systemd/system/kube-nginx.service <<EOF
[Unit]
Description=kube-apiserver nginx proxy
After=network.target
After=network-online.target
Wants=network-online.target[Service]
Type=forking
ExecStartPre=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx -t
ExecStart=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx
ExecReload=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx -s reload
PrivateTmp=true
Restart=always
RestartSec=5
StartLimitInterval=0
LimitNOFILE=65536[Install]
WantedBy=multi-user.target
EOF设置开机自启
systemctl enable --now kube-nginx
systemctl restart kube-nginx
systemctl status kube-nginx
5.2 keepalived和haproxy 高可用方案
5.2.1安装keepalived和haproxy服务
systemctl disable --now firewalldsetenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
yum -y install keepalived haproxy
5.2.2修改haproxy配置文件（配置文件一样）
# cp /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.bakcat >/etc/haproxy/haproxy.cfg<<"EOF"
global
maxconn 2000
ulimit-n 16384
log 127.0.0.1 local0 err
stats timeout 30sdefaults
log global
mode http
option httplog
timeout connect 5000
timeout client 50000
timeout server 50000
timeout http-request 15s
timeout http-keep-alive 15sfrontend monitor-in
bind *:33305
mode http
option httplog
monitor-uri /monitorfrontend k8s-master
bind 0.0.0.0:9443
bind 127.0.0.1:9443
mode tcp
option tcplog
tcp-request inspect-delay 5s
default_backend k8s-master
backend k8s-master
mode tcp
option tcplog
option tcp-check
balance roundrobin
default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
server k8s-master01 192.168.0.31:6443 check
server k8s-master02 192.168.0.32:6443 check
server k8s-master03 192.168.0.33:6443 check
EOF
5.2.3Master01配置keepalived master节点
#cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bakcat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalivedglobal_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state MASTER
# 注意网卡名
interface eth0
mcast_src_ip 192.168.0.31
virtual_router_id 51
priority 100
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.0.36
}
track_script {
chk_apiserver
} }
EOF
5.2.4Master02配置keepalived backup节点
# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bakcat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalivedglobal_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1}
vrrp_instance VI_1 {
state BACKUP
# 注意网卡名
interface eth0
mcast_src_ip 192.168.0.32
virtual_router_id 51
priority 80
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.0.36
}
track_script {
chk_apiserver
} }
EOF
5.2.5Master03配置keepalived backup节点
# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bakcat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalivedglobal_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1}
vrrp_instance VI_1 {
state BACKUP
# 注意网卡名
interface eth0
mcast_src_ip 192.168.0.33
virtual_router_id 51
priority 50
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.0.36
}
track_script {
chk_apiserver
} }
EOF
5.2.6健康检查脚本配置（lb主机）
cat > /etc/keepalived/check_apiserver.sh << EOF
#!/bin/basherr=0
for k in $(seq 1 3)
do
check_code=$(pgrep haproxy)
if [[ $check_code == "" ]]; then
err=$(expr $err + 1)
sleep 1
continue
else
err=0
break
fi
doneif [[ $err != "0" ]]; then
echo "systemctl stop keepalived"
/usr/bin/systemctl stop keepalived
exit 1
else
exit 0
fi
EOF给脚本授权
chmod +x /etc/keepalived/check_apiserver.sh
5.2.7启动服务
systemctl daemon-reload
systemctl enable --now haproxy
systemctl enable --now keepalived
5.2.8测试高可用
# 能ping同[root@k8s-node02 ~]# ping 192.168.0.36
能telnet访问
[root@k8s-node02 ~]# telnet 192.168.0.36 9443
关闭主节点，看vip是否漂移到备节点
6.k8s组件配置
所有k8s节点创建以下目录
mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes
6.1.创建apiserver（所有master节点）
6.1.1master01节点配置
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target[Service]
ExecStart=/usr/local/bin/kube-apiserver \
--v=2 \
--allow-privileged=true \
--bind-address=0.0.0.0 \
--secure-port=6443 \
--advertise-address=192.168.0.31 \
--service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
--service-node-port-range=30000-32767 \
--etcd-servers=https://192.168.0.31//192.168.0.32:2379,https://192.168.0.33:2379 \
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
--etcd-certfile=/etc/etcd/ssl/etcd.pem \
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
--client-ca-file=/etc/kubernetes/pki/ca.pem \
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
--service-account-key-file=/etc/kubernetes/pki/sa.pub \
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
--service-account-issuer=https://kubernetes.default.svc.cluster.local \
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota
--authorization-mode=Node,RBAC \
--enable-bootstrap-token-auth=true \
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
--requestheader-allowed-names=aggregator \
--requestheader-group-headers=X-Remote-Group \
--requestheader-extra-headers-prefix=X-Remote-Extra- \
--requestheader-username-headers=X-Remote-User \
--enable-aggregator-routing=true
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535[Install]
WantedBy=multi-user.target
EOF
6.1.2master02节点配置
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target[Service]
ExecStart=/usr/local/bin/kube-apiserver \
--v=2 \
--allow-privileged=true \
--bind-address=0.0.0.0 \
--secure-port=6443 \
--advertise-address=192.168.0.32 \
--service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
--service-node-port-range=30000-32767 \
--etcd-servers=https://192.168.0.31//192.168.0.32:2379,https://192.168.0.33:2379 \
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
--etcd-certfile=/etc/etcd/ssl/etcd.pem \
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
--client-ca-file=/etc/kubernetes/pki/ca.pem \
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
--service-account-key-file=/etc/kubernetes/pki/sa.pub \
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
--service-account-issuer=https://kubernetes.default.svc.cluster.local \
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
--authorization-mode=Node,RBAC \
--enable-bootstrap-token-auth=true \
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
--requestheader-allowed-names=aggregator \
--requestheader-group-headers=X-Remote-Group \
--requestheader-extra-headers-prefix=X-Remote-Extra- \
--requestheader-username-headers=X-Remote-User \
--enable-aggregator-routing=trueRestart=on-failure
RestartSec=10s
LimitNOFILE=65535[Install]
WantedBy=multi-user.target
EOF
6.1.3master03节点配置
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target[Service]
ExecStart=/usr/local/bin/kube-apiserver \
--v=2 \
--allow-privileged=true \
--bind-address=0.0.0.0 \
--secure-port=6443 \
--advertise-address=192.168.0.33 \
--service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
--service-node-port-range=30000-32767 \
--etcd-servers=https://192.168.0.31//192.168.0.32:2379,https://192.168.0.33:2379 \
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
--etcd-certfile=/etc/etcd/ssl/etcd.pem \
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
--client-ca-file=/etc/kubernetes/pki/ca.pem \
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
--service-account-key-file=/etc/kubernetes/pki/sa.pub \
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
--service-account-issuer=https://kubernetes.default.svc.cluster.local \
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
--authorization-mode=Node,RBAC \
--enable-bootstrap-token-auth=true \
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
--requestheader-allowed-names=aggregator \
--requestheader-group-headers=X-Remote-Group \
--requestheader-extra-headers-prefix=X-Remote-Extra- \
--requestheader-username-headers=X-Remote-User \
--enable-aggregator-routing=trueRestart=on-failure
RestartSec=10s
LimitNOFILE=65535[Install]
WantedBy=multi-user.target
EOF
6.1.4启动apiserver（所有master节点）
systemctl daemon-reload
systemctl enable --now kube-apiserver
systemctl restart kube-apiserver
systemctl status kube-apiserver
6.2.配置kube-controller-manager service
# 所有master节点配置，且配置相同172.16.0.0/12为pod网段，按需求设置你自己的网段
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target[Service]
ExecStart=/usr/local/bin/kube-controller-manager \
--v=2 \
--bind-address=0.0.0.0 \
--root-ca-file=/etc/kubernetes/pki/ca.pem \
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \
--service-account-private-key-file=/etc/kubernetes/pki/sa.key \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \
--leader-elect=true \
--use-service-account-credentials=true \
--node-monitor-grace-period=40s \
--node-monitor-period=5s \
--controllers=*,bootstrapsigner,tokencleaner \
--allocate-node-cidrs=true \
--service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
--cluster-cidr=172.16.0.0/12,fc00::/48 \
--node-cidr-mask-size-ipv4=24 \
--node-cidr-mask-size-ipv6=120 \
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pemRestart=always
RestartSec=10s[Install]
WantedBy=multi-user.target
EOF
6.2.1启动kube-controller-manager，并查看状态
systemctl daemon-reload
systemctl enable --now kube-controller-manager
systemctl restart kube-controller-manager
systemctl status kube-controller-manager
6.3.配置kube-scheduler service
6.3.1所有master节点配置，且配置相同
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target[Service]
ExecStart=/usr/local/bin/kube-scheduler \
--v=2 \
--bind-address=0.0.0.0 \
--leader-elect=true \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfigRestart=always
RestartSec=10s[Install]
WantedBy=multi-user.target
EOF
6.3.2启动并查看服务状态
systemctl daemon-reload
systemctl enable --now kube-scheduler
systemctl restart kube-scheduler
systemctl status kube-scheduler
7.TLS Bootstrapping配置
7.1在master01上配置
# 在《5.高可用配置》选择使用那种高可用方案若使用 haproxy、keepalived 那么为
--server=https://192.168.0.36:8443若使用 nginx方案，那么为
--server=https://127.0.0.1:8443cd bootstrap
kubectl config set-cluster kubernetes
--certificate-authority=/etc/kubernetes/pki/ca.pem
--embed-certs=true --server=https://127.0.0.1
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfigkubectl config set-credentials tls-bootstrap-token-user
--token=c8ad9c.2e4d610cf3e7426e
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfigkubectl config set-context tls-bootstrap-token-user@kubernetes
--cluster=kubernetes
--user=tls-bootstrap-token-user
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfigkubectl config use-context tls-bootstrap-token-user@kubernetes
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfigtoken的位置在bootstrap.secret.yaml，如果修改的话到这个文件修改
mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config
7.2查看集群状态，没问题的话继续后续操作
kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-0 Healthy {"health":"true","reason":""}
etcd-2 Healthy {"health":"true","reason":""}
etcd-1 Healthy {"health":"true","reason":""}切记执行，别忘记！！！
kubectl create -f bootstrap.secret.yaml
8.node节点配置
8.1.在master01上将证书复制到node节点
cd /etc/kubernetes/
for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do ssh NODE mkdir -p /etc/kubernetes/pki; for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig kube-proxy.kubeconfig; do scp /etc/kubernetes/FILE NODE:/etc/kubernetes/{FILE}; done; done
8.2.kubelet配置
注意 ：8.2.1 和 8.2.2 需要和 上方 2.1 和 2.2 对应起来
8.2.1当使用docker作为Runtime
cat > /usr/lib/systemd/system/kubelet.service << EOF[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes[Service]
ExecStart=/usr/local/bin/kubelet \
--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig \
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig \
--config=/etc/kubernetes/kubelet-conf.yml \
--container-runtime-endpoint=unix:///run/cri-dockerd.sock \
--node-labels=node.kubernetes.io/node=
[Install]
WantedBy=multi-user.target
EOF
8.2.2当使用Containerd作为Runtime （推荐）
mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/所有k8s节点配置kubelet service
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=containerd.service
Requires=containerd.service[Service]
ExecStart=/usr/local/bin/kubelet \
--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig \
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig \
--config=/etc/kubernetes/kubelet-conf.yml \
--container-runtime-endpoint=unix:///run/containerd/containerd.sock \
--node-labels=node.kubernetes.io/node=
[Install]
WantedBy=multi-user.target
EOF
8.2.3所有k8s节点创建kubelet的配置文件
cat > /etc/kubernetes/kubelet-conf.yml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable: pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
EOF
8.2.4启动kubelet
systemctl daemon-reload
systemctl enable --now kubelet
systemctl restart kubelet
systemctl status kubelet
8.2.5查看集群
[root@k8s-master01 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 Ready <none> 18s v1.27.3
k8s-master02 Ready <none> 16s v1.27.3
k8s-master03 Ready <none> 16s v1.27.3
k8s-node01 Ready <none> 14s v1.27.3
k8s-node02 Ready <none> 14s v1.27.3
[root@k8s-master01 ~]#
8.2.6查看容器运行时
[root@k8s-master01 ~]# kubectl describe node | grep Runtime
Container Runtime Version: containerd://1.7.2
Container Runtime Version: containerd://1.7.2
Container Runtime Version: containerd://1.7.2
Container Runtime Version: containerd://1.7.2
Container Runtime Version: containerd://1.7.2
[root@k8s-master01 ~]# kubectl describe node | grep Runtime
Container Runtime Version: docker://24.0.2
Container Runtime Version: docker://24.0.2
Container Runtime Version: docker://24.0.2
Container Runtime Version: docker://24.0.2
Container Runtime Version: docker://24.0.2
8.3.kube-proxy配置
8.3.1将kubeconfig发送至其他节点
for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig; done
8.3.2所有k8s节点添加kube-proxy的service文件
cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Kube Proxy
Documentation=https://github.com/kubernetes/kubernetes
After=network.target[Service]
ExecStart=/usr/local/bin/kube-proxy \
--config=/etc/kubernetes/kube-proxy.yaml \
--v=2Restart=always
RestartSec=10s[Install]
WantedBy=multi-user.target
EOF
8.3.3所有k8s节点添加kube-proxy的配置
cat > /etc/kubernetes/kube-proxy.yaml << EOF
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
clientConnection:
acceptContentTypes: ""
burst: 10
contentType: application/vnd.kubernetes.protobuf
kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
qps: 5
clusterCIDR: 172.16.0.0/12,fc00::/48
configSyncPeriod: 15m0s
conntrack:
max: null
maxPerCore: 32768
min: 131072
tcpCloseWaitTimeout: 1h0m0s
tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: ""
iptables:
masqueradeAll: false
masqueradeBit: 14
minSyncPeriod: 0s
syncPeriod: 30s
ipvs:
masqueradeAll: true
minSyncPeriod: 5s
scheduler: "rr"
syncPeriod: 30s
kind: KubeProxyConfiguration
metricsBindAddress: 127.0.0.1:10249
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: -999
portRange: ""
udpIdleTimeout: 250ms
EOF
8.3.4启动kube-proxy
systemctl daemon-reload
systemctl restart kube-proxy
systemctl enable --now kube-proxy
systemctl status kube-proxy
9.安装网络插件
注意 9.1 和 9.2 二选其一即可，建议在此处创建好快照后在进行操作，后续出问题可以回滚
** centos7 要升级libseccomp 不然 无法安装网络插件**
# https://github.com/opencontainers/runc/releases升级runc
wget https://ghproxy.com/https://github.com/opencontainers/runc/releases/download/v1.1.4/runc.amd64
install -m 755 runc.amd64 /usr/local/sbin/runc
cp -p /usr/local/sbin/runc /usr/local/bin/runc
cp -p /usr/local/sbin/runc /usr/bin/runc#下载高于2.4以上的包
yum -y install http://rpmfind.net/linux/centos/8-stream/BaseOS/x86_64/os/Packages/libseccomp-2.5.1-1.el8.x86_64.rpm清华源
yum -y install https://mirrors.tuna.tsinghua.edu.cn/centos/8-stream/BaseOS/x86_64/os/Packages/libseccomp-2.5.1-1.el8.x86_64.rpm
#查看当前版本
[root@k8s-master-1 ~]# rpm -qa | grep libseccomp
libseccomp-2.5.1-1.el8.x86_64
9.1安装Calico
9.1.1更改calico网段
wget https://mirrors.chenby.cn/https://github.com/projectcalico/calico/blob/master/manifests/calico-typha.yamlcp calico-typha.yaml calico.yaml
cp calico-typha.yaml calico-ipv6.yamlvim calico.yaml
calico-config ConfigMap处
"ipam": { "type": "calico-ipam", }, - name: IP value: "autodetect" - name: CALICO_IPV4POOL_CIDR value: "172.16.0.0/12"vim calico-ipv6.yaml
calico-config ConfigMap处
"ipam": { "type": "calico-ipam", "assign_ipv4": "true", "assign_ipv6": "true" }, - name: IP value: "autodetect" - name: IP6 value: "autodetect" - name: CALICO_IPV4POOL_CIDR value: "172.16.0.0/12" - name: CALICO_IPV6POOL_CIDR value: "fc00::/48" - name: FELIX_IPV6SUPPORT value: "true"若docker镜像拉不下来，可以使用国内的仓库
sed -i "s#docker.io/calico/#m.daocloud.io/docker.io/calico/#g" calico.yaml
sed -i "s#docker.io/calico/#m.daocloud.io/docker.io/calico/#g" calico-ipv6.yaml本地没有公网 IPv6 使用 calico.yaml
kubectl apply -f calico.yaml
本地有公网 IPv6 使用 calico-ipv6.yaml
kubectl apply -f calico-ipv6.yaml
9.1.2查看容器状态
# calico 初始化会很慢 需要耐心等待一下，大约十分钟左右
[root@k8s-master01 ~]# kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-kube-controllers-6747f75cdc-fbvvc 1/1 Running 0 61s
kube-system calico-node-fs7hl 1/1 Running 0 61s
kube-system calico-node-jqz58 1/1 Running 0 61s
kube-system calico-node-khjlg 1/1 Running 0 61s
kube-system calico-node-wmf8q 1/1 Running 0 61s
kube-system calico-node-xc6gn 1/1 Running 0 61s
kube-system calico-typha-6cdc4b4fbc-57snb 1/1 Running 0 61s
9.2 安装cilium
9.2.1 安装helm
# [root@k8s-master01 ~]# curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3[root@k8s-master01 ~]# chmod 700 get_helm.sh
[root@k8s-master01 ~]# ./get_helm.sh
wget https://files.m.daocloud.io/get.helm.sh/helm-v3.12.1-linux-amd64.tar.gz
tar xvf helm-*-linux-amd64.tar.gz
cp linux-amd64/helm /usr/local/bin/
9.2.2 安装cilium
# 添加源
helm repo add cilium https://helm.cilium.io修改为国内源
helm pull cilium/cilium
tar xvf cilium-*.tgz
cd cilium/
sed -i "s#quay.io/#m.daocloud.io/quay.io/#g" values.yaml默认参数安装
helm install cilium ./cilium/ -n kube-system
启用ipv6
helm install cilium cilium/cilium --namespace kube-system --set ipv6.enabled=true
启用路由信息和监控插件
helm install cilium cilium/cilium --namespace kube-system --set hubble.relay.enabled=true --set hubble.ui.enabled=true --set prometheus.enabled=true --set operator.prometheus.enabled=true --set hubble.enabled=true --set hubble.metrics.enabled=""
9.2.3 查看
[root@k8s-master01 ~]# kubectl get pod -A | grep cil
kube-system cilium-gmr6c 1/1 Running 0 5m3s
kube-system cilium-kzgdj 1/1 Running 0 5m3s
kube-system cilium-operator-69b677f97c-6pw4k 1/1 Running 0 5m3s
kube-system cilium-operator-69b677f97c-xzzdk 1/1 Running 0 5m3s
kube-system cilium-q2rnr 1/1 Running 0 5m3s
kube-system cilium-smx5v 1/1 Running 0 5m3s
kube-system cilium-tdjq4 1/1 Running 0 5m3s
[root@k8s-master01 ~]#
9.2.4 下载专属监控面板
安装时候没有创建 监控可以忽略
[root@k8s-master01 yaml]# wget https://mirrors.chenby.cn/https://raw.githubusercontent.com/cilium/cilium/1.12.1/examples/kubernetes/addons/prometheus/monitoring-example.yaml[root@k8s-master01 yaml]# sed -i "s#docker.io/#m.daocloud.io/docker.io/#g" monitoring-example.yaml
[root@k8s-master01 yaml]# kubectl apply -f monitoring-example.yaml
namespace/cilium-monitoring created
serviceaccount/prometheus-k8s created
configmap/grafana-config created
configmap/grafana-cilium-dashboard created
configmap/grafana-cilium-operator-dashboard created
configmap/grafana-hubble-dashboard created
configmap/prometheus created
clusterrole.rbac.authorization.k8s.io/prometheus created
clusterrolebinding.rbac.authorization.k8s.io/prometheus created
service/grafana created
service/prometheus created
deployment.apps/grafana created
deployment.apps/prometheus created
[root@k8s-master01 yaml]#
9.2.5 下载部署测试用例
说明 测试用例 需要在 安装CoreDNS 之后即可完成
[root@k8s-master01 yaml]# wget https://mirrors.chenby.cn/https://raw.githubusercontent.com/cilium/cilium/master/examples/kubernetes/connectivity-check/connectivity-check.yaml[root@k8s-master01 yaml]# sed -i "s#google.com#baidu.cn#g" connectivity-check.yaml
sed -i "s#quay.io/#m.daocloud.io/quay.io/#g" connectivity-check.yaml
[root@k8s-master01 yaml]# kubectl apply -f connectivity-check.yaml
deployment.apps/echo-a created
deployment.apps/echo-b created
deployment.apps/echo-b-host created
deployment.apps/pod-to-a created
deployment.apps/pod-to-external-1111 created
deployment.apps/pod-to-a-denied-cnp created
deployment.apps/pod-to-a-allowed-cnp created
deployment.apps/pod-to-external-fqdn-allow-google-cnp created
deployment.apps/pod-to-b-multi-node-clusterip created
deployment.apps/pod-to-b-multi-node-headless created
deployment.apps/host-to-b-multi-node-clusterip created
deployment.apps/host-to-b-multi-node-headless created
deployment.apps/pod-to-b-multi-node-nodeport created
deployment.apps/pod-to-b-intra-node-nodeport created
service/echo-a created
service/echo-b created
service/echo-b-headless created
service/echo-b-host-headless created
ciliumnetworkpolicy.cilium.io/pod-to-a-denied-cnp created
ciliumnetworkpolicy.cilium.io/pod-to-a-allowed-cnp created
ciliumnetworkpolicy.cilium.io/pod-to-external-fqdn-allow-google-cnp created
[root@k8s-master01 yaml]#
9.2.6 查看pod
[root@k8s-master01 yaml]# kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
cilium-monitoring grafana-59957b9549-6zzqh 1/1 Running 0 10m
cilium-monitoring prometheus-7c8c9684bb-4v9cl 1/1 Running 0 10m
default chenby-75b5d7fbfb-7zjsr 1/1 Running 0 27h
default chenby-75b5d7fbfb-hbvr8 1/1 Running 0 27h
default chenby-75b5d7fbfb-ppbzg 1/1 Running 0 27h
default echo-a-6799dff547-pnx6w 1/1 Running 0 10m
default echo-b-fc47b659c-4bdg9 1/1 Running 0 10m
default echo-b-host-67fcfd59b7-28r9s 1/1 Running 0 10m
default host-to-b-multi-node-clusterip-69c57975d6-z4j2z 1/1 Running 0 10m
default host-to-b-multi-node-headless-865899f7bb-frrmc 1/1 Running 0 10m
default pod-to-a-allowed-cnp-5f9d7d4b9d-hcd8x 1/1 Running 0 10m
default pod-to-a-denied-cnp-65cc5ff97b-2rzb8 1/1 Running 0 10m
default pod-to-a-dfc64f564-p7xcn 1/1 Running 0 10m
default pod-to-b-intra-node-nodeport-677868746b-trk2l 1/1 Running 0 10m
default pod-to-b-multi-node-clusterip-76bbbc677b-knfq2 1/1 Running 0 10m
default pod-to-b-multi-node-headless-698c6579fd-mmvd7 1/1 Running 0 10m
default pod-to-b-multi-node-nodeport-5dc4b8cfd6-8dxmz 1/1 Running 0 10m
default pod-to-external-1111-8459965778-pjt9b 1/1 Running 0 10m
default pod-to-external-fqdn-allow-google-cnp-64df9fb89b-l9l4q 1/1 Running 0 10m
kube-system cilium-7rfj6 1/1 Running 0 56s
kube-system cilium-d4cch 1/1 Running 0 56s
kube-system cilium-h5x8r 1/1 Running 0 56s
kube-system cilium-operator-5dbddb6dbf-flpl5 1/1 Running 0 56s
kube-system cilium-operator-5dbddb6dbf-gcznc 1/1 Running 0 56s
kube-system cilium-t2xlz 1/1 Running 0 56s
kube-system cilium-z65z7 1/1 Running 0 56s
kube-system coredns-665475b9f8-jkqn8 1/1 Running 1 (36h ago) 36h
kube-system hubble-relay-59d8575-9pl9z 1/1 Running 0 56s
kube-system hubble-ui-64d4995d57-nsv9j 2/2 Running 0 56s
kube-system metrics-server-776f58c94b-c6zgs 1/1 Running 1 (36h ago) 37h
[root@k8s-master01 yaml]#
9.2.7 修改为NodePort
安装时候没有创建 监控可以忽略
[root@k8s-master01 yaml]# kubectl edit svc -n kube-system hubble-ui
service/hubble-ui edited
[root@k8s-master01 yaml]#
[root@k8s-master01 yaml]# kubectl edit svc -n cilium-monitoring grafana
service/grafana edited
[root@k8s-master01 yaml]#
[root@k8s-master01 yaml]# kubectl edit svc -n cilium-monitoring prometheus
service/prometheus edited
[root@k8s-master01 yaml]#
type: NodePort
9.2.8 查看端口
安装时候没有创建 监控可以忽略
[root@k8s-master01 yaml]# kubectl get svc -A | grep monit
cilium-monitoring grafana NodePort 10.100.250.17 <none> 3000:30707/TCP 15m
cilium-monitoring prometheus NodePort 10.100.131.243 <none> 9090:31155/TCP 15m
[root@k8s-master01 yaml]#
[root@k8s-master01 yaml]# kubectl get svc -A | grep hubble
kube-system hubble-metrics ClusterIP None <none> 9965/TCP 5m12s
kube-system hubble-peer ClusterIP 10.100.150.29 <none> 443/TCP 5m12s
kube-system hubble-relay ClusterIP 10.109.251.34 <none> 80/TCP 5m12s
kube-system hubble-ui NodePort 10.102.253.59 <none> 80:31219/TCP 5m12s
[root@k8s-master01 yaml]#
9.2.9 访问
安装时候没有创建 监控可以忽略
10.安装CoreDNS
10.1以下步骤只在master01操作
10.1.1修改文件
# 下载tgz包
helm repo add coredns https://coredns.github.io/helm
helm pull coredns/coredns
tar xvf coredns-*.tgz
cd coredns/修改IP地址
vim values.yaml
cat values.yaml | grep clusterIP:
clusterIP: "10.96.0.10"示例
service:
clusterIP: ""
clusterIPs: []
loadBalancerIP: ""
externalIPs: []
externalTrafficPolicy: ""
ipFamilyPolicy: ""
The name of the Service
If not set, a name is generated using the fullname template
clusterIP: "10.96.0.10"
name: ""
annotations: {}修改为国内源 docker源可选
sed -i "s#coredns/#m.daocloud.io/docker.io/coredns/#g" values.yaml
sed -i "s#registry.k8s.io/#m.daocloud.io/registry.k8s.io/#g" values.yaml默认参数安装
helm install coredns ./coredns/ -n kube-system
11.安装Metrics Server
11.1以下步骤只在master01操作
11.1.1安装Metrics-server
在新版的Kubernetes中系统资源的采集均使用Metrics-server，可以通过Metrics采集节点和Pod的内存、磁盘、CPU和网络的使用率
# 单机版
wget https://mirrors.chenby.cn/https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml高可用版本
修改配置
vim components.yaml
vim high-availability.yaml
1
defaultArgs:
- --cert-dir=/tmp
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --kubelet-use-node-status-port
- --metric-resolution=15s
- --kubelet-insecure-tls
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
- --requestheader-username-headers=X-Remote-User
- --requestheader-group-headers=X-Remote-Group
- --requestheader-extra-headers-prefix=X-Remote-Extra-
2
volumeMounts: - mountPath: /tmp name: tmp-dir - name: ca-ssl mountPath: /etc/kubernetes/pki3
volumes: - emptyDir: {} name: tmp-dir - name: ca-ssl hostPath: path: /etc/kubernetes/pki
修改为国内源 docker源可选
sed -i "s#registry.k8s.io/#m.daocloud.io/registry.k8s.io/#g" *.yaml
二选一
kubectl apply -f components.yaml
kubectl apply -f high-availability.yaml
11.1.2稍等片刻查看状态
kubectl top node
NAME CPU(cores) CPU% MEMORY(bytes) MEMORY%
k8s-master01 197m 4% 1497Mi 39%
k8s-master02 152m 3% 1315Mi 34%
k8s-master03 112m 2% 1274Mi 33%
k8s-node01 142m 3% 777Mi 20%
k8s-node02 71m 1% 682Mi 17%
12.集群验证
12.1部署pod资源
cat<<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
name: busybox
namespace: default
spec:
containers:
- name: busybox
image: docker.io/library/busybox:1.28
command:
- sleep
- "3600"
imagePullPolicy: IfNotPresent
restartPolicy: Always
EOF查看
kubectl get pod
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 0 17s
12.2用pod解析默认命名空间中的kubernetes
# 查看name
kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 17h进行解析
kubectl exec busybox -n default -- nslookup kubernetes
3Server: 10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name: kubernetes
Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local
12.3测试跨命名空间是否可以解析
# 查看有那些name
kubectl get svc -A
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 76m
kube-system calico-typha ClusterIP 10.105.100.82 <none> 5473/TCP 35m
kube-system coredns-coredns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP 8m14s
kube-system metrics-server ClusterIP 10.105.60.31 <none> 443/TCP 109s进行解析
kubectl exec busybox -n default -- nslookup coredns-coredns.kube-system
Server: 10.96.0.10
Address 1: 10.96.0.10 coredns-coredns.kube-system.svc.cluster.local
Name: coredns-coredns.kube-system
Address 1: 10.96.0.10 coredns-coredns.kube-system.svc.cluster.local
[root@k8s-master01 metrics-server]#
12.4每个节点都必须要能访问Kubernetes的kubernetes svc 443和kube-dns的service 53
telnet 10.96.0.1 443
Trying 10.96.0.1...
Connected to 10.96.0.1.
Escape character is '^]'.telnet 10.96.0.10 53
Trying 10.96.0.10...
Connected to 10.96.0.10.
Escape character is '^]'.
curl 10.96.0.10:53
curl: (52) Empty reply from server
12.5Pod和Pod之前要能通
kubectl get po -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
busybox 1/1 Running 0 17m 172.27.14.193 k8s-node02 <none> <none>kubectl get po -n kube-system -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
calico-kube-controllers-76754ff848-pw4xg 1/1 Running 0 38m 172.25.244.193 k8s-master01 <none> <none>
calico-node-97m55 1/1 Running 0 38m 192.168.0.34 k8s-node01 <none> <none>
calico-node-hlz7j 1/1 Running 0 38m 192.168.0.32 k8s-master02 <none> <none>
calico-node-jtlck 1/1 Running 0 38m 192.168.0.33 k8s-master03 <none> <none>
calico-node-lxfkf 1/1 Running 0 38m 192.168.0.35 k8s-node02 <none> <none>
calico-node-t667x 1/1 Running 0 38m 192.168.0.31 k8s-master01 <none> <none>
calico-typha-59d75c5dd4-gbhfp 1/1 Running 0 38m 192.168.0.35 k8s-node02 <none> <none>
coredns-coredns-c5c6d4d9b-bd829 1/1 Running 0 10m 172.25.92.65 k8s-master02 <none> <none>
metrics-server-7c8b55c754-w7q8v 1/1 Running 0 3m56s 172.17.125.3 k8s-node01 <none> <none>进入busybox ping其他节点上的pod
kubectl exec -ti busybox -- sh
/ # ping 192.168.0.34
PING 192.168.0.34 (192.168.0.34): 56 data bytes
64 bytes from 192.168.0.34: seq=0 ttl=63 time=0.358 ms
64 bytes from 192.168.0.34: seq=1 ttl=63 time=0.668 ms
64 bytes from 192.168.0.34: seq=2 ttl=63 time=0.637 ms
64 bytes from 192.168.0.34: seq=3 ttl=63 time=0.624 ms
64 bytes from 192.168.0.34: seq=4 ttl=63 time=0.907 ms可以连通证明这个pod是可以跨命名空间和跨主机通信的
12.6创建三个副本，可以看到3个副本分布在不同的节点上（用完可以删了）
cat > deployments.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
replicas: 3
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort: 80EOF
kubectl apply -f deployments.yaml
deployment.apps/nginx-deployment createdkubectl get pod
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 0 6m25s
nginx-deployment-9456bbbf9-4bmvk 1/1 Running 0 8s
nginx-deployment-9456bbbf9-9rcdk 1/1 Running 0 8s
nginx-deployment-9456bbbf9-dqv8s 1/1 Running 0 8s删除nginx
[root@k8s-master01 ~]# kubectl delete -f deployments.yaml
13.安装dashboard
helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard/
helm install kubernetes-dashboard kubernetes-dashboard/kubernetes-dashboard --namespace kube-system
13.1更改dashboard的svc为NodePort，如果已是请忽略
kubectl edit svc kubernetes-dashboard -n kube-system
type: NodePort
13.2查看端口号
kubectl get svc kubernetes-dashboard -n kube-system
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes-dashboard NodePort 10.108.120.110 <none> 443:30034/TCP 34s
13.3创建token
cat > dashboard-user.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
name: admin-user
namespace: kube-systemapiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: admin-user
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: admin-user
namespace: kube-system
EOFkubectl apply -f dashboard-user.yaml
创建token
kubectl -n kube-system create token admin-user
eyJhbGciOiJSUzI1NiIsImtpZCI6ImtHTXRwbS1IR3NabHR5WDhYTUhUX1Rnekt4M1pzNFNNM3NwLXdkSlh3T2MifQ.eyJhdWQiOlsiaHR0cHM6Ly9rdWJlcm5ldGVzLmRlZmF1bHQuc3ZjLmNsdXN0ZXIubG9jYWwiXSwiZXhwIjoxNjg3ODc1MjIyLCJpYXQiOjE2ODc4NzE2MjIsImlzcyI6Imh0dHBzOi8va3ViZXJuZXRlcy5kZWZhdWx0LnN2Yy5jbHVzdGVyLmxvY2FsIiwia3ViZXJuZXRlcy5pbyI6eyJuYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsInNlcnZpY2VhY2NvdW50Ijp7Im5hbWUiOiJhZG1pbi11c2VyIiwidWlkIjoiZjZiMzYzYzEtZjE1Ni00YTBhLTk5MzUtYmZmN2YzZWJlNTU2In19LCJuYmYiOjE2ODc4NzE2MjIsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlLXN5c3RlbTphZG1pbi11c2VyIn0.uNIwe8tzA7IjdBWiCroZxT7OGw9IiCdPT0R1E1G5k965tVH9spVxz6PFvWLwNl6QnjhvseDUAbz0yBIJ3v42nsp1EYZeKXMYxfPGqgZ_7EQ4xYh-zEEoHLtdVVo20beCVtzTzEV_0doUehV_GLDt1es794OI7s4SlxYOtc1MMg50VUr4jkUvfuDPqHSMh2cirnTJXL9TX_3K-30W4c_fN2TCxWoWpwa4G-5oCORx8j9FLejTldHDFB_Z4TNhirNQLpi05C6OT43HiVxrsD6fgvPUQatUznCedb48RWTjCk8nY0CTsZ3VR6Vby4MOrlHf57asMFfe6lSTIcDSj0lV1g
13.3登录dashboard
14.ingress安装
14.1执行部署
wget https://mirrors.chenby.cn/https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/cloud/deploy.yaml修改为国内源 docker源可选
sed -i "s#registry.k8s.io/#m.daocloud.io/registry.k8s.io/#g" *.yaml
cat > backend.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: default-http-backend
labels:
app.kubernetes.io/name: default-http-backend
namespace: kube-system
spec:
replicas: 1
selector:
matchLabels:
app.kubernetes.io/name: default-http-backend
template:
metadata:
labels:
app.kubernetes.io/name: default-http-backend
spec:
terminationGracePeriodSeconds: 60
containers:
- name: default-http-backend
image: registry.cn-hangzhou.aliyuncs.com/chenby/defaultbackend-amd64:1.5
livenessProbe:
httpGet:
path: /healthz
port: 8080
scheme: HTTP
initialDelaySeconds: 30
timeoutSeconds: 5
ports:
- containerPort: 8080
resources:
limits:
cpu: 10m
memory: 20Mi
requests:
cpu: 10m
memory: 20MiapiVersion: v1
kind: Service
metadata:
name: default-http-backend
namespace: kube-system
labels:
app.kubernetes.io/name: default-http-backend
spec:
ports:
- port: 80
targetPort: 8080
selector:
app.kubernetes.io/name: default-http-backend
EOFkubectl apply -f deploy.yaml
kubectl apply -f backend.yamlcat > ingress-demo-app.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: hello-server
spec:
replicas: 2
selector:
matchLabels:
app: hello-server
template:
metadata:
labels:
app: hello-server
spec:
containers:
- name: hello-server
image: registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/hello-server
ports:
- containerPort: 9000apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: nginx-demo
name: nginx-demo
spec:
replicas: 2
selector:
matchLabels:
app: nginx-demo
template:
metadata:
labels:
app: nginx-demo
spec:
containers:
- image: nginx
name: nginxapiVersion: v1
kind: Service
metadata:
labels:
app: nginx-demo
name: nginx-demo
spec:
selector:
app: nginx-demo
ports:
- port: 8000
protocol: TCP
targetPort: 80
apiVersion: v1
kind: Service
metadata:
labels:
app: hello-server
name: hello-server
spec:
selector:
app: hello-server
ports:
- port: 8000
protocol: TCP
targetPort: 9000
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: ingress-host-bar
spec:
ingressClassName: nginx
rules:
- host: "hello.chenby.cn"
http:
paths:
- pathType: Prefix
path: "/"
backend:
service:
name: hello-server
port:
number: 8000- host: "demo.chenby.cn"
http:
paths:
- pathType: Prefix
path: "/nginx"
backend:
service:
name: nginx-demo
port:
number: 8000
EOF等创建完成后在执行：
kubectl apply -f ingress-demo-app.yaml
kubectl get ingress
NAME CLASS HOSTS ADDRESS PORTS AGE
ingress-host-bar nginx hello.chenby.cn,demo.chenby.cn 192.168.0.32 80 7s
14.2过滤查看ingress端口
# 修改为nodeport
kubectl edit svc -n ingress-nginx ingress-nginx-controllertype: NodePort
[root@hello ~/yaml]# kubectl get svc -A | grep ingress
ingress-nginx ingress-nginx-controller NodePort 10.104.231.36 <none> 80:32636/TCP,443:30579/TCP 104s
ingress-nginx ingress-nginx-controller-admission ClusterIP 10.101.85.88 <none> 443/TCP 105s
[root@hello ~/yaml]#
15.IPv6测试
#部署应用cat<<EOF | kubectl apply -f -
apiVersion: apps/v1
kind: Deployment
metadata:
name: chenby
spec:
replicas: 3
selector:
matchLabels:
app: chenby
template:
metadata:
labels:
app: chenby
spec:
containers:
- name: chenby
image: docker.io/library/nginx
resources:
limits:
memory: "128Mi"
cpu: "500m"
ports:
- containerPort: 80
apiVersion: v1
kind: Service
metadata:
name: chenby
spec:
ipFamilyPolicy: PreferDualStack
ipFamilies:
- IPv6
- IPv4
type: NodePort
selector:
app: chenby
ports:- port: 80
targetPort: 80
EOF#查看端口
[root@k8s-master01 ~]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
chenby NodePort fd00::a29c <none> 80:30779/TCP 5s
[root@k8s-master01 ~]##使用内网访问
[root@localhost yaml]# curl -I http://[fd00::a29c]
HTTP/1.1 200 OK
Server: nginx/1.21.6
Date: Thu, 05 May 2022 10:20:35 GMT
Content-Type: text/html
Content-Length: 615
Last-Modified: Tue, 25 Jan 2022 15:03:52 GMT
Connection: keep-alive
ETag: "61f01158-267"
Accept-Ranges: bytes[root@localhost yaml]# curl -I http://192.168.0.31
HTTP/1.1 200 OK
Server: nginx/1.21.6
Date: Thu, 05 May 2022 10:20:59 GMT
Content-Type: text/html
Content-Length: 615
Last-Modified: Tue, 25 Jan 2022 15:03:52 GMT
Connection: keep-alive
ETag: "61f01158-267"
Accept-Ranges: bytes[root@localhost yaml]#
#使用公网访问
[root@localhost yaml]# curl -I http://[2409:8a10:9e18:9020::10]:30779
HTTP/1.1 200 OK
Server: nginx/1.21.6
Date: Thu, 05 May 2022 10:20:54 GMT
Content-Type: text/html
Content-Length: 615
Last-Modified: Tue, 25 Jan 2022 15:03:52 GMT
Connection: keep-alive
ETag: "61f01158-267"
Accept-Ranges: bytes
16.安装命令行自动补全功能
yum install bash-completion -y
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc
附录
# 镜像加速器可以使用DaoCloud仓库，替换规则如下
cr.l5d.io/ ===> m.daocloud.io/cr.l5d.io/
docker.elastic.co/ ===> m.daocloud.io/docker.elastic.co/
docker.io/ ===> m.daocloud.io/docker.io/
gcr.io/ ===> m.daocloud.io/gcr.io/
ghcr.io/ ===> m.daocloud.io/ghcr.io/
k8s.gcr.io/ ===> m.daocloud.io/k8s.gcr.io/
mcr.microsoft.com/ ===> m.daocloud.io/mcr.microsoft.com/
nvcr.io/ ===> m.daocloud.io/nvcr.io/
quay.io/ ===> m.daocloud.io/quay.io/
registry.jujucharms.com/ ===> m.daocloud.io/registry.jujucharms.com/
registry.k8s.io/ ===> m.daocloud.io/registry.k8s.io/
registry.opensource.zalan.do/ ===> m.daocloud.io/registry.opensource.zalan.do/
rocks.canonical.com/ ===> m.daocloud.io/rocks.canonical.com/镜像版本要自行查看，因为镜像版本是随时更新的，文档无法做到实时更新
docker pull 镜像
docker pull registry.cn-hangzhou.aliyuncs.com/chenby/cni:master
docker pull registry.cn-hangzhou.aliyuncs.com/chenby/node:master
docker pull registry.cn-hangzhou.aliyuncs.com/chenby/kube-controllers:master
docker pull registry.cn-hangzhou.aliyuncs.com/chenby/typha:master
docker pull registry.cn-hangzhou.aliyuncs.com/chenby/coredns:v1.10.0
docker pull registry.cn-hangzhou.aliyuncs.com/chenby/pause:3.6
docker pull registry.cn-hangzhou.aliyuncs.com/chenby/metrics-server:v0.5.2
docker pull kubernetesui/dashboard:v2.7.0
docker pull kubernetesui/metrics-scraper:v1.0.8
docker pull quay.io/cilium/cilium:v1.12.6
docker pull quay.io/cilium/certgen:v0.1.8
docker pull quay.io/cilium/hubble-relay:v1.12.6
docker pull quay.io/cilium/hubble-ui-backend:v0.9.2
docker pull quay.io/cilium/hubble-ui:v0.9.2
docker pull quay.io/cilium/cilium-etcd-operator:v2.0.7
docker pull quay.io/cilium/operator:v1.12.6
docker pull quay.io/cilium/clustermesh-apiserver:v1.12.6
docker pull quay.io/coreos/etcd:v3.5.4
docker pull quay.io/cilium/startup-script:d69851597ea019af980891a4628fb36b7880ec26docker 保存镜像
docker save registry.cn-hangzhou.aliyuncs.com/chenby/cni:master -o cni.tar
docker save registry.cn-hangzhou.aliyuncs.com/chenby/node:master -o node.tar
docker save registry.cn-hangzhou.aliyuncs.com/chenby/typha:master -o typha.tar
docker save registry.cn-hangzhou.aliyuncs.com/chenby/kube-controllers:master -o kube-controllers.tar
docker save registry.cn-hangzhou.aliyuncs.com/chenby/coredns:v1.10.0 -o coredns.tar
docker save registry.cn-hangzhou.aliyuncs.com/chenby/pause:3.6 -o pause.tar
docker save registry.cn-hangzhou.aliyuncs.com/chenby/metrics-server:v0.5.2 -o metrics-server.tar
docker save kubernetesui/dashboard:v2.7.0 -o dashboard.tar
docker save kubernetesui/metrics-scraper:v1.0.8 -o metrics-scraper.tar
docker save quay.io/cilium/cilium:v1.12.6 -o cilium.tar
docker save quay.io/cilium/certgen:v0.1.8 -o certgen.tar
docker save quay.io/cilium/hubble-relay:v1.12.6 -o hubble-relay.tar
docker save quay.io/cilium/hubble-ui-backend:v0.9.2 -o hubble-ui-backend.tar
docker save quay.io/cilium/hubble-ui:v0.9.2 -o hubble-ui.tar
docker save quay.io/cilium/cilium-etcd-operator:v2.0.7 -o cilium-etcd-operator.tar
docker save quay.io/cilium/operator:v1.12.6 -o operator.tar
docker save quay.io/cilium/clustermesh-apiserver:v1.12.6 -o clustermesh-apiserver.tar
docker save quay.io/coreos/etcd:v3.5.4 -o etcd.tar
docker save quay.io/cilium/startup-script:d69851597ea019af980891a4628fb36b7880ec26 -o startup-script.tar传输到各个节点
for NODE in k8s-master01 k8s-master02 k8s-master03 k8s-node01 k8s-node02; do scp -r images/ $NODE:/root/ ; done
创建命名空间
ctr ns create k8s.io
导入镜像
ctr --namespace k8s.io image import images/cni.tar
ctr --namespace k8s.io image import images/node.tar
ctr --namespace k8s.io image import images/typha.tar
ctr --namespace k8s.io image import images/kube-controllers.tar
ctr --namespace k8s.io image import images/coredns.tar
ctr --namespace k8s.io image import images/pause.tar
ctr --namespace k8s.io image import images/metrics-server.tar
ctr --namespace k8s.io image import images/dashboard.tar
ctr --namespace k8s.io image import images/metrics-scraper.tar
ctr --namespace k8s.io image import images/dashboard.tar
ctr --namespace k8s.io image import images/metrics-scraper.tar
ctr --namespace k8s.io image import images/cilium.tar
ctr --namespace k8s.io image import images/certgen.tar
ctr --namespace k8s.io image import images/hubble-relay.tar
ctr --namespace k8s.io image import images/hubble-ui-backend.tar
ctr --namespace k8s.io image import images/hubble-ui.tar
ctr --namespace k8s.io image import images/cilium-etcd-operator.tar
ctr --namespace k8s.io image import images/operator.tar
ctr --namespace k8s.io image import images/clustermesh-apiserver.tar
ctr --namespace k8s.io image import images/etcd.tar
ctr --namespace k8s.io image import images/startup-script.tarpull tar包 解压后
helm pull cilium/cilium
查看镜像版本
root@hello:~/cilium# cat values.yaml| grep tag: -C1
repository: "quay.io/cilium/cilium"
tag: "v1.12.6"
pullPolicy: "IfNotPresent"repository: "quay.io/cilium/certgen" tag: "v0.1.8@sha256:4a456552a5f192992a6edcec2febb1c54870d665173a33dc7d876129b199ddbd" pullPolicy: "IfNotPresent"--
repository: "quay.io/cilium/hubble-relay"
tag: "v1.12.6"
# hubble-relay-digestrepository: "quay.io/cilium/hubble-ui-backend" tag: "v0.9.2@sha256:a3ac4d5b87889c9f7cc6323e86d3126b0d382933bd64f44382a92778b0cde5d7" pullPolicy: "IfNotPresent"--
repository: "quay.io/cilium/hubble-ui"
tag: "v0.9.2@sha256:d3596efc94a41c6b772b9afe6fe47c17417658956e04c3e2a28d293f2670663e"
pullPolicy: "IfNotPresent"repository: "quay.io/cilium/cilium-etcd-operator" tag: "v2.0.7@sha256:04b8327f7f992693c2cb483b999041ed8f92efc8e14f2a5f3ab95574a65ea2dc" pullPolicy: "IfNotPresent"--
repository: "quay.io/cilium/operator"
tag: "v1.12.6"
# operator-generic-digestrepository: "quay.io/cilium/startup-script" tag: "d69851597ea019af980891a4628fb36b7880ec26" pullPolicy: "IfNotPresent"--
repository: "quay.io/cilium/cilium"
tag: "v1.12.6"
# cilium-digestrepository: "quay.io/cilium/clustermesh-apiserver" tag: "v1.12.6" # clustermesh-apiserver-digest
--
repository: "quay.io/coreos/etcd"
tag: "v3.5.4@sha256:795d8660c48c439a7c3764c2330ed9222ab5db5bb524d8d0607cac76f7ba82a3"
pullPolicy: "IfNotPresent"
