高可用 k8s 1.29 一键安装脚本, 丝滑至极

M·K·T2024-02-09 8:08

博客原文

文章目录

集群配置

配置清单

  • OS： ubuntu 20.04
  • kubernetes： 1.29.1
  • Container Runtime：Containerd 1.7.11
  • CRI: runc 1.10
  • CNI: cni-plugin 1.4

集群规划

IP Hostname 配置
192.168.254.130 master01 2C 4G 30G
192.168.254.131 master02 2C 4G 30G
192.168.254.132 node1 2C 4G 30G

集群网络规划

  • Pod 网络: 10.244.0.0/16
  • Service 网络: 10.96.0.0/12
  • Node 网络: 192.168.254.0/24

环境初始化

主机配置

sh 复制代码 
ssh-keygen
ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.254.131
ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.254.132

# 将节点加入 hosts
cat << EOF >> /etc/hosts
192.168.254.130 master01
192.168.254.131 master02
192.168.254.132 node01
EOF

配置高可用ApiServer

安装 nginx

所有 master 节点都要操作

sh 复制代码 
apt install nginx -y
systemctl status nginx

# 修改 nginx 配置文件
cat /etc/nginx/nginx.conf
user user;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
        worker_connections 768;
        # multi_accept on;
}

#添加了stream 这一段，其他的保持默认即可
stream {
    log_format  main  '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
    access_log  /var/log/nginx/k8s-access.log  main;
    upstream k8s-apiserver {
       server 192.168.254.130:6443;          #master01的IP和6443端口
       server 192.168.254.131:6443;          #master02的IP和6443端口
    }
    server {
       listen 16443;                                    #监听的是16443端口，因为nginx和master复用机器，所以不能是6443端口
       proxy_pass k8s-apiserver;                #使用proxy_pass模块进行反向代理
    }
}

......



# 重启 nginx 服务
systemctl restart nginx && systemctl enable nginx && systemctl status nginx

# 端口检查
# netstat  -lntup| grep 16443
nc -l -p 16443
#nc: Address already in use

安装 Keepalived

所有 master 节点都要操作

sh 复制代码 
apt install keepalived -y

# 写入 nginx 检查脚本
cat << EOF > /etc/keepalived/nginx_check.sh
#!/bin/bash
#1、判断Nginx是否存活
counter=`ps -C nginx --no-header | wc -l`
if [ $counter -eq 0 ]; then
    #2、如果不存活则尝试启动Nginx
    ./usr/local/nginx/sbin/nginx
    sleep 2
    #3、等待2秒后再次获取一次Nginx状态
    counter=`ps -C nginx --no-header | wc -l`
    #4、再次进行判断，如Nginx还不存活则停止Keepalived，让地址进行漂移
    if [ $counter -eq 0 ]; then
        killall keepalived
    fi
fi
EOF

chmod +x /etc/keepalived/nginx_check.sh

更改 master01 的 keepalived 配置:

sh 复制代码 
cat << EOF > /etc/keepalived/keepalived.conf
global_defs {
   router_id LVS_DEVEL
   vrrp_skip_check_adv_addr
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

vrrp_script chk_nginx {
        script "/etc/keepalived/nginx_check.sh" ## 检测 nginx 状态的脚本路径
        interval 2              ## 检测时间间隔
        weight -20              ## 如果条件成立，权重-20
}

vrrp_instance VI_1 {
    state MASTER                ##主节点为 MASTER，备份节点为 BACKUP
    interface ens33             ##绑定 VIP 的网络接口，与本机IP地址所在网络接口相同
    virtual_router_id 100       ##虚拟路由id，主从节点必须保持一致
    priority 100                ##节点优先级，直范围0-254，MASTER 要比 BACKUP 高
    advert_int 1
    authentication {            ##设置验证信息，两个节点必须一致
        auth_type PASS
        auth_pass 123456
    }
    track_script {
        chk_nginx               ##执行 Nginx 监控
    }
    virtual_ipaddress {
        192.168.254.100          ##VIP，两个节点必须设置一样(可设置多个)
    }
}
EOF

systemctl restart keepalived && systemctl enable keepalived.service
ip a | grep 192.168.254.100

更改 master02 的 keepalived 配置:

sh 复制代码 
cat << EOF > /etc/keepalived/keepalived.conf
global_defs {
   router_id LVS_DEVEL
   vrrp_skip_check_adv_addr
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

vrrp_script chk_nginx {
        script "/etc/keepalived/nginx_check.sh" ## 检测 nginx 状态的脚本路径
        interval 2              ## 检测时间间隔
        weight -20              ## 如果条件成立，权重-20
}

vrrp_instance VI_1 {
    state BACKUP                ##主节点为 MASTER，备份节点为 BACKUP
    interface ens33             ##绑定 VIP 的网络接口，与本机IP地址所在网络接口相同
    virtual_router_id 100       ##虚拟路由id，主从节点必须保持一致
    priority 90                ##节点优先级，直范围0-254，MASTER 要比 BACKUP 高
    advert_int 1
    authentication {            ##设置验证信息，两个节点必须一致
        auth_type PASS
        auth_pass 123456
    }
    track_script {
        chk_nginx               ##执行 Nginx 监控
    }
    virtual_ipaddress {
        192.168.254.100          ##VIP，两个节点必须设置一样(可设置多个)
    }
}
EOF

systemctl restart keepalived && systemctl enable keepalived.service
ip a | grep 192.168.254.100

安装脚本

**前置条件: ** 脚本中存在拉取国外资源, 需要你配置代理 ==> [如何让虚拟机拥有愉快网络环境](https://ai-feier.github.io/p/如何让虚拟机拥有愉快网络环境/)

需要:

  • 虚拟机代理
  • apt 下载代理

需要魔法的脚本

在所有节点执行以下脚本

脚本功能:

  • 时间同步
  • 关闭 swap
  • 启用内核模块
  • 安装 ipvs 并启用内核参数
  • 安装 containerd, runc, cni
  • 更改 containerd 沙箱镜像和 cgroup 并且配置镜像加速
  • 安装最新 kubelet, kubeadm, kubectl

注意: 请先通过export name=master01方式设置当前 node 的 hostname

install.sh:

sh 复制代码 
export name=master01  # 改为你 hostname 的名称, 脚本中删除该行
#!/bin/bash

hostnamectl set-hostname $name

# 阿里源
mv /etc/apt/sources.list /etc/apt/sources.list.bak
cat <<EOF > /etc/apt/sources.list
deb https://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiversedeb https://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
EOF
apt update


# 时间同步
timedatectl set-timezone Asia/Shanghai
#安装chrony，联网同步时间
apt install chrony -y && systemctl enable --now chronyd

# 禁用 swap
sudo swapoff -a && sed -i '/swap/s/^/#/' /etc/fstab

# 安装 ipvs
apt install -y ipset ipvsadm

# 配置需要的内核模块
cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF

# 启动模块
sudo modprobe overlay
sudo modprobe br_netfilter

cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward                 = 1
EOF

# 是 sysctl 参数生效
sudo sysctl --system
# 检验是否配置成功
#lsmod | grep br_netfilter
#lsmod | grep overlay
#sysctl net.bridge.bridge-nf-call-iptables net.bridge.bridge-nf-call-ip6tables net.ipv4.ip_forward


# 配置 ipvs 内核参数
cat <<EOF | sudo tee /etc/modules-load.d/ipvs.conf
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack
EOF

# 内核加载 ipvs
sudo modprobe ip_vs
sudo modprobe ip_vs_rr
sudo modprobe ip_vs_wrr
sudo modprobe ip_vs_sh
sudo modprobe nf_conntrack
# 确认ipvs模块加载
#lsmod |grep -e ip_vs -e nf_conntrack


# 安装 Containerd
wget -c https://github.com/containerd/containerd/releases/download/v1.7.11/containerd-1.7.11-linux-amd64.tar.gz
tar -xzvf containerd-1.7.11-linux-amd64.tar.gz
#解压出来一个bin目录,containerd可执行文件都在bin目录里面
mv bin/* /usr/local/bin/
rm -rf bin

#使用systemcd来管理containerd
cat << EOF > /usr/lib/systemd/system/containerd.service
[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

# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNPROC=infinity
LimitCORE=infinity

# Comment TasksMax if your systemd version does not supports it.
# Only systemd 226 and above support this version.
TasksMax=infinity
OOMScoreAdjust=-999

[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload && systemctl enable --now containerd 
#systemctl  status containerd


# 安装 runc
#runc是容器运行时，runc实现了容器的init，run，create，ps...我们在运行容器所需要的cmd：
curl -LO https://github.com/opencontainers/runc/releases/download/v1.1.10/runc.amd64 && \
install -m 755 runc.amd64 /usr/local/sbin/runc

# 安装 CNI plugins
wget -c https://github.com/containernetworking/plugins/releases/download/v1.4.0/cni-plugins-linux-amd64-v1.4.0.tgz
#根据官网的安装步骤来，创建一个目录用于存放cni插件
mkdir -p /opt/cni/bin
tar -xzvf  cni-plugins-linux-amd64-v1.4.0.tgz -C /opt/cni/bin/

# 修改 Containd 配置
#修改containerd的配置，因为containerd默认从k8s官网拉取镜像
#创建一个目录用于存放containerd的配置文件
mkdir -p /etc/containerd
#把containerd配置导出到文件
containerd config default | sudo tee /etc/containerd/config.toml

# 修改沙箱镜像
sed -i 's#sandbox_image = "registry.k8s.io/pause:.*"#sandbox_image = "registry.aliyuncs.com/google_containers/pause:3.9"#' /etc/containerd/config.toml
# 修改 cgroup 为 systemd
sed -i 's#SystemdCgroup = false#SystemdCgroup = true#' /etc/containerd/config.toml
# 配置镜像加速
sed -i 's#config_path = ""#config_path = "/etc/containerd/certs.d"#' /etc/containerd/config.toml

# 配置 Containerd 镜像源
# docker hub镜像加速
mkdir -p /etc/containerd/certs.d/docker.io
cat > /etc/containerd/certs.d/docker.io/hosts.toml << EOF
server = "https://docker.io"
[host."https://dockerproxy.com"]
  capabilities = ["pull", "resolve"]

[host."https://docker.m.daocloud.io"]
  capabilities = ["pull", "resolve"]

[host."https://reg-mirror.qiniu.com"]
  capabilities = ["pull", "resolve"]

[host."https://registry.docker-cn.com"]
  capabilities = ["pull", "resolve"]

[host."http://hub-mirror.c.163.com"]
  capabilities = ["pull", "resolve"]

EOF

# k8s.gcr.io镜像加速
mkdir -p /etc/containerd/certs.d/k8s.gcr.io
tee /etc/containerd/certs.d/k8s.gcr.io/hosts.toml << 'EOF'
server = "https://k8s.gcr.io"

[host."https://k8s-gcr.m.daocloud.io"]
  capabilities = ["pull", "resolve", "push"]
EOF

#重启containerd
systemctl restart containerd 
#systemctl status containerd

# 安装 kubeadm、kubelet、kubectl
# 安装依赖
sudo systemctl restart containerd
sudo apt-get update -y
sudo apt-get install -y apt-transport-https ca-certificates curl gpg 

mkdir -p /etc/apt/keyrings
curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.29/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.29/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list

sudo apt-get update -y
sudo apt-get install -y kubelet kubeadm kubectl 
sudo apt-mark hold kubelet kubeadm kubectl

# kubelet 开机自启
systemctl enable --now kubelet

# 配置 crictl socket
crictl config  runtime-endpoint unix:///run/containerd/containerd.sock
crictl config image-endpoint unix:///run/containerd/containerd.sock

不需要魔法的脚本

前置:

下载我下载好的资源包

资源列表:

资源 原始地址
Container Runtime：Containerd 1.7.11 https://github.com/containerd/containerd/releases/download/v1.7.11/containerd-1.7.11-linux-amd64.tar.gz
CRI: runc 1.10 https://github.com/opencontainers/runc/releases/download/v1.1.10/runc.amd64
CNI: cni-plugin 1.4 https://github.com/containernetworking/plugins/releases/download/v1.4.0/cni-plugins-linux-amd64-v1.4.0.tgz
calico 3.27 : tigera-operator.yaml https://raw.githubusercontent.com/projectcalico/calico/v3.27.0/manifests/tigera-operator.yaml
calico 3.27 : custom-resources.yaml https://raw.githubusercontent.com/projectcalico/calico/v3.27.0/manifests/custom-resources.yaml

下载资源:

sh 复制代码 
wget -O k8s1.29.tar.gz https://blog-source-mkt.oss-cn-chengdu.aliyuncs.com/resources/k8s/kubeadm%20init/k8s1.29.tar.gz
tar xzvf k8s1.29.tar.gz
cd workdir

export name=master01  # 改为你 hostname 的名称

在所有节点执行以下脚本

脚本功能:

  • 时间同步
  • 关闭 swap
  • 启用内核模块
  • 安装 ipvs 并启用内核参数
  • 安装 containerd, runc, cni
  • 更改 containerd 沙箱镜像和 cgroup 并且配置镜像加速
  • 安装最新 kubelet, kubeadm, kubectl

注意: 请先通过export name=master01方式设置当前 node 的 hostname

install.sh:

sh 复制代码 
#!/bin/bash

hostnamectl set-hostname $name

# 阿里源
mv /etc/apt/sources.list /etc/apt/sources.list.bak
cat <<EOF > /etc/apt/sources.list
deb https://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiversedeb https://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
EOF
apt update


# 时间同步
timedatectl set-timezone Asia/Shanghai
#安装chrony，联网同步时间
apt install chrony -y && systemctl enable --now chronyd

# 禁用 swap
sudo swapoff -a && sed -i '/swap/s/^/#/' /etc/fstab

# 安装 ipvs
apt install -y ipset ipvsadm

# 配置需要的内核模块
cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF

# 启动模块
sudo modprobe overlay
sudo modprobe br_netfilter

cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward                 = 1
EOF

# 是 sysctl 参数生效
sudo sysctl --system
# 检验是否配置成功
#lsmod | grep br_netfilter
#lsmod | grep overlay
#sysctl net.bridge.bridge-nf-call-iptables net.bridge.bridge-nf-call-ip6tables net.ipv4.ip_forward


# 配置 ipvs 内核参数
cat <<EOF | sudo tee /etc/modules-load.d/ipvs.conf
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack
EOF

# 内核加载 ipvs
sudo modprobe ip_vs
sudo modprobe ip_vs_rr
sudo modprobe ip_vs_wrr
sudo modprobe ip_vs_sh
sudo modprobe nf_conntrack
# 确认ipvs模块加载
#lsmod |grep -e ip_vs -e nf_conntrack


# 安装 Containerd
#wget -c https://github.com/containerd/containerd/releases/download/v1.7.11/containerd-1.7.11-linux-amd64.tar.gz
tar -xzvf containerd-1.7.11-linux-amd64.tar.gz
#解压出来一个bin目录,containerd可执行文件都在bin目录里面
mv bin/* /usr/local/bin/
rm -rf bin

#使用systemcd来管理containerd
cat << EOF > /usr/lib/systemd/system/containerd.service
[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

# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNPROC=infinity
LimitCORE=infinity

# Comment TasksMax if your systemd version does not supports it.
# Only systemd 226 and above support this version.
TasksMax=infinity
OOMScoreAdjust=-999

[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload && systemctl enable --now containerd 
#systemctl  status containerd


# 安装 runc
#runc是容器运行时，runc实现了容器的init，run，create，ps...我们在运行容器所需要的cmd：
#curl -LO https://github.com/opencontainers/runc/releases/download/v1.1.10/runc.amd64 && \
install -m 755 runc.amd64 /usr/local/sbin/runc

# 安装 CNI plugins
#wget -c https://github.com/containernetworking/plugins/releases/download/v1.4.0/cni-plugins-linux-amd64-v1.4.0.tgz
#根据官网的安装步骤来，创建一个目录用于存放cni插件
mkdir -p /opt/cni/bin
tar -xzvf  cni-plugins-linux-amd64-v1.4.0.tgz -C /opt/cni/bin/

# 修改 Containd 配置
#修改containerd的配置，因为containerd默认从k8s官网拉取镜像
#创建一个目录用于存放containerd的配置文件
mkdir -p /etc/containerd
#把containerd配置导出到文件
containerd config default | sudo tee /etc/containerd/config.toml

# 修改沙箱镜像
sed -i 's#sandbox_image = "registry.k8s.io/pause:.*"#sandbox_image = "registry.aliyuncs.com/google_containers/pause:3.9"#' /etc/containerd/config.toml
# 修改 cgroup 为 systemd
sed -i 's#SystemdCgroup = false#SystemdCgroup = true#' /etc/containerd/config.toml
# 配置镜像加速
sed -i 's#config_path = ""#config_path = "/etc/containerd/certs.d"#' /etc/containerd/config.toml

# 配置 Containerd 镜像源
# docker hub镜像加速
mkdir -p /etc/containerd/certs.d/docker.io
cat > /etc/containerd/certs.d/docker.io/hosts.toml << EOF
server = "https://docker.io"
[host."https://dockerproxy.com"]
  capabilities = ["pull", "resolve"]

[host."https://docker.m.daocloud.io"]
  capabilities = ["pull", "resolve"]

[host."https://reg-mirror.qiniu.com"]
  capabilities = ["pull", "resolve"]

[host."https://registry.docker-cn.com"]
  capabilities = ["pull", "resolve"]

[host."http://hub-mirror.c.163.com"]
  capabilities = ["pull", "resolve"]

EOF

# k8s.gcr.io镜像加速
mkdir -p /etc/containerd/certs.d/k8s.gcr.io
tee /etc/containerd/certs.d/k8s.gcr.io/hosts.toml << 'EOF'
server = "https://k8s.gcr.io"

[host."https://k8s-gcr.m.daocloud.io"]
  capabilities = ["pull", "resolve", "push"]
EOF

#重启containerd
systemctl restart containerd 
#systemctl status containerd

# 安装 kubeadm、kubelet、kubectl
# 安装依赖
sudo apt-get update -y
sudo apt-get install -y apt-transport-https ca-certificates curl gpg 

mkdir -p /etc/apt/keyrings
curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.29/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.29/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list

sudo apt-get update -y
sudo apt-get install -y kubelet kubeadm kubectl 
sudo apt-mark hold kubelet kubeadm kubectl

# kubelet 开机自启
systemctl enable --now kubelet

# 配置 crictl socket
crictl config  runtime-endpoint unix:///run/containerd.sock
crictl config image-endpoint unix:///run/containerd/containerd.sock
sh 复制代码 
chmod +x install.sh
./install.sh

初始化 master01

暴露环境变量

sh 复制代码 
export K8S_VERSION=1.29.1   # k8s 集群版本
export POD_CIDR=10.244.0.0/16   # pod 网段
export SERVICE_CIDR=10.96.0.0/12   # service 网段
export APISERVER_MASTER01=192.168.254.130   # master01 ip
export APISERVER_HA=192.168.254.100    # 集群 vip 地址
export APISERVER_HA_PORT=16443    # 集群 vip 地址

在你的主节点初始化集群(同样在 workdir/ 下)

sh 复制代码 
# 命令行方式初始化, 后面需要手动更改 kube-proxy 为 ipvs 模式
# kubeadm init --apiserver-advertise-address=$APISERVER_MASTER01 --apiserver-bind-port=6443 --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.29.1 --service-cidr=$SERVICE_CIDR --pod-network-cidr=$POD_CIDR --upload-certs

# kubeadm config print init-defaults >Kubernetes-cluster.yaml  # kubeadm 默认配置
cat << EOF > Kubernetes-cluster.yaml
apiVersion: kubeadm.k8s.io/v1beta3
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authentication
kind: InitConfiguration
localAPIEndpoint:
  # 将此处IP地址替换为主节点IP ETCD容器会试图通过此地址绑定端口 如果主机不存在则会失败
  advertiseAddress: $APISERVER_MASTER01
  bindPort: 6443
nodeRegistration:
  criSocket: unix:///run/containerd/containerd.sock
  imagePullPolicy: IfNotPresent
  name: $name  # 节点 hostname
  taints: null
---
# controlPlaneEndpoint 可配置高可用的 ApiServer
apiServer:
  timeoutForControlPlane: 4m0s
  certSANs: # 主节点IP
  - $APISERVER_HA
  - $APISERVER_MASTER01
apiVersion: kubeadm.k8s.io/v1beta3
controlPlaneEndpoint: "$APISERVER_HA:$APISERVER_HA_PORT"
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns: {}
etcd:  # 可使用外接 etcd 集群
  local:
    dataDir: /var/lib/etcd
imageRepository: registry.aliyuncs.com/google_containers  # 国内源
kind: ClusterConfiguration
kubernetesVersion: $K8S_VERSION
networking:
  dnsDomain: cluster.local
  # 增加配置 指定pod网段
  podSubnet: $POD_CIDR
  serviceSubnet: $SERVICE_CIDR
scheduler: {}
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
mode: ipvs  # kubeproxy 使用 ipvs
---
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
cgroupDriver: systemd
EOF

kubeadm init --config Kubernetes-cluster.yaml --upload-certs


mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

# 安装 calico
sed -i 's#cidr.*#cidr: '$POD_CIDR'#' custom-resources.yaml
kubectl create -f tigera-operator.yaml
kubectl create -f custom-resources.yaml

--upload-certs: 将控制平面证书上传到 kubeadm-certs Secret。

​ 简单来说: 后面就不需要把集群证书拷贝到其他 master 节点

配置自动补全

sh 复制代码 
apt install bash-completion -y
cat << EOF >> ~/.profile
alias k='kubectl'
source <(kubectl completion bash)
complete -F __start_kubectl k
EOF

source ~/.profile

加入其余节点

master02:

sh 复制代码 
kubeadm join 192.168.254.100:16443 --token abcdef.0123456789abcdef \
        --discovery-token-ca-cert-hash sha256:6c9f43be739919e1e03abaa3d0deae00bc2400f77dc7574e338dc6460be2eab6 \
        --control-plane --certificate-key 02feec260870e7145d69b65d0252f1067768c193d9e8c4aba31ed1b1fa7aaba8

node01:

sh 复制代码 
kubeadm join 192.168.254.100:16443 --token abcdef.0123456789abcdef \
        --discovery-token-ca-cert-hash sha256:6c9f43be739919e1e03abaa3d0deae00bc2400f77dc7574e338dc6460be2eab6

验证集群

sh 复制代码 
$ k get po -A
NAMESPACE         NAME                                       READY   STATUS              RESTARTS   AGE
calico-system     calico-kube-controllers-75f84bf8b4-96hht   0/1     ContainerCreating   0          6m19s
calico-system     calico-node-4cd7c                          0/1     PodInitializing     0          105s
calico-system     calico-node-7z22c                          0/1     PodInitializing     0          109s
calico-system     calico-node-pcq8m                          0/1     Running             0          6m19s
calico-system     calico-typha-65b78b8f8d-r2qjn              1/1     Running             0          100s
calico-system     calico-typha-65b78b8f8d-vv4ph              1/1     Running             0          6m19s
calico-system     csi-node-driver-bsd66                      0/2     ContainerCreating   0          105s
calico-system     csi-node-driver-h465x                      0/2     ContainerCreating   0          109s
calico-system     csi-node-driver-htqj2                      0/2     ContainerCreating   0          6m19s
kube-system       coredns-857d9ff4c9-nk4kx                   1/1     Running             0          6m40s
kube-system       coredns-857d9ff4c9-w6zff                   1/1     Running             0          6m40s
kube-system       etcd-master01                              1/1     Running             0          6m53s
kube-system       etcd-master02                              1/1     Running             0          97s
kube-system       kube-apiserver-master01                    1/1     Running             0          6m53s
kube-system       kube-apiserver-master02                    1/1     Running             0          98s
kube-system       kube-controller-manager-master01           1/1     Running             0          6m53s
kube-system       kube-controller-manager-master02           1/1     Running             0          97s
kube-system       kube-proxy-7mwpd                           1/1     Running             0          109s
kube-system       kube-proxy-gfcqb                           1/1     Running             0          6m40s
kube-system       kube-proxy-vkkm4                           1/1     Running             0          105s
kube-system       kube-scheduler-master01                    1/1     Running             0          6m53s
kube-system       kube-scheduler-master02                    1/1     Running             0          99s
tigera-operator   tigera-operator-55585899bf-xssq5           1/1     Running             0          6m40s

参考:

  1. https://kubernetes.io/zh-cn/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
  2. https://ai-feier.github.io/p/keepalived-nginx实现高可用apiserver/
  3. https://blog.csdn.net/m0_51964671/article/details/135256571
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