CentOS二进制安装Kubernetes

前言

最近在私有云部署一套自动化运维平台；

其中k8s是重头戏，这篇文章为大家分享一下二进制安装方式

k8s架构图

安装过程

• 基本环境

  • CentOS版本 7.9.2009
  • Etcd 版本3.4.14
  • Docker
  • k8s版本 1.17.16

• kube-apiserver服务安装

  • 下载并解压

cd /soft
wget https://dl.k8s.io/v1.20.0/kubernetes-server-linux-amd64.tar.gz
tar -zxvf kubernetes-server-linux-amd64.tar.gz
cd kubernetes

• 创建启动配置文件

mkdir /soft/kubernetes/server/conf/
vim /soft/kubernetes/server/conf/apiserver
  
KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
KUBE_API_PORT="--port=8886"
KUBE_ETCD_SERVERS="--etcd-servers=http://10.9.0.46:2379"
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=169.169.0.0/16"
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,LimitRanger,SecurityContextDeny,ResourceQuota"
KUBE_API_LOG="--logtostderr=false --log-dir=/home/k8s-t/log/kubernets --v=2"
KUBE_API_ARGS=" "

• 修改配置文件

vim /etc/systemd/system/kube-apiserver.service
  
[Unit]
Description=Kubernetes API Server
After=etcd.service
Wants=etcd.service
  
[Service]
EnvironmentFile=/soft/kubernetes/server/conf/apiserver
ExecStart=/soft/kubernetes/server/bin/kube-apiserver  \
          $KUBE_ETCD_SERVERS \
          $KUBE_API_ADDRESS \
          $KUBE_API_PORT \
          $KUBE_SERVICE_ADDRESSES \
          $KUBE_ADMISSION_CONTROL \
        $KUBE_API_LOG \
          $KUBE_API_ARGS 
Restart=on-failure
  Type=notify
  LimitNOFILE=65536
  
[Install]
WantedBy=multi-user.target

• kube-controller-manger服务安装
• 创建启动配置文件

vim /soft/kubernetes/server/conf/controller-manager

KUBE_MASTER="--master=http://10.9.0.46:8886"
KUBE_CONTROLLER_MANAGER_ARGS=" "

• 修改配置文件

vim /etc/systemd/system/kube-controller-manager.service
  
[Unit]
Description=Kubernetes Scheduler
After=kube-apiserver.service 
Requires=kube-apiserver.service

[Service]
EnvironmentFile=-/soft/kubernetes/server/conf/controller-manager
ExecStart=/soft/kubernetes/server/bin/kube-controller-manager \
        $KUBE_MASTER \
        $KUBE_CONTROLLER_MANAGER_ARGS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

• kube-scheduler服务安装
• 创建启动配置文件

vim /soft/kubernetes/server/conf/scheduler

KUBE_MASTER="--master=http://10.9.0.46:8886"
KUBE_SCHEDULER_ARGS="--logtostderr=true --log-dir=/home/k8s-t/log/kubernetes --v=2"

• 创建服务配置文件

vim /etc/systemd/system/kube-scheduler.service

[Unit]
Description=Kubernetes Scheduler
After=kube-apiserver.service 
Requires=kube-apiserver.service

[Service]
User=root
EnvironmentFile=-/soft/kubernetes/server/conf/scheduler
ExecStart=/soft/kubernetes/server/bin/kube-scheduler \
        $KUBE_MASTER \
        $KUBE_SCHEDULER_ARGS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target 

• 将各个组件启动

systemctl daemon-reload
systemctl enable kube-apiserver.service
systemctl start kube-apiserver.service

systemctl enable kube-controller-manager.service
systemctl start kube-controller-manager.service

systemctl enable kube-scheduler.service
systemctl start kube-scheduler.service

总结

• k8s改变了项目运维的方式，使得发布变得十分简单的同时降低了项目风险；

• 多动手多实践；