虚拟机使用minikube搭建k8s集群
一、安装docker(目前登录的是root用户)
1、下载 https://download.docker.com/linux/centos/7/x86_64/stable/Packages/
本次使用 20.10.9版本
2、解压
tar xfz docker-20.10.9.tgz
3、复制到 /usr/bin
cp -rf docker/* /usr/bin/
4、将docker注册为系统服务
vi /usr/lib/systemd/system/docker.service
写入内容
点击查看内容
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by do cker
ExecStart=/usr/bin/dockerd
ExecReload=/bin/kill -s HUP $MAINPID
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this version.
#TasksMax=infinity
TimeoutStartSec=0
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
# kill only the docker process, not all processes in the cgroup
KillMode=process
# restart the docker process if it exits prematurely
Restart=onfailure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
保存
5、添加文件权限
chmod u+x /usr/lib/systemd/system/docker.service
6、重载unit配置文件
systemctl daemon-reload
7、启动docker
systemctl enable docker
8、查看docker状态
systemctl status docker
二、安装kubectl v1.30.0
1、新建用户
useradd kube
2、给予权限
vi /etc/sudoers
在这两行下面
## Allow root to run any commands anywhere
root ALL=(ALL) ALL
添加内容
kube ALL=(ALL) NOPASSWD:ALL
保存,这里需要强制保存 wq!
3、切换用户
su kube
接下来所有操作都是kube用户
4、新建组docker,kube用户加入docker组
sudo groupadd docker
sudo usermod -aG docker $USER && newgrp docker
5、下载
curl -LO https://dl.k8s.io/release/v1.30.0/bin/linux/amd64/kubectl
6、安装 kubectl
sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl
7、测试是否安装成功
kubectl version --client
三、安装minikube
1、下载(如果不能下载去阿里云下载)
curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
2、安装
sudo install minikube-linux-amd64 /usr/local/bin/minikube && rm minikube-linux-amd64
3、测试是否安装成功
minikube version
4、启动
minikube start
启动过程大致如下,会自动拉取镜像
**在centos7下会有pod启动不起来的情况**
issues
按照官方说法是kubectl的版本和centos7的兼容性问题,默认安装的minikube版本为 1.33.0,kubectl的版本为1.30.0
降低kubectl的版本即可，使用如下命令启动
minikube start --container-runtime=docker --kubernetes-version=1.28.3 -p k8s-1.28.3
