安装kubernetes的几种方法
1 环境
如果没有物理机或者云主机的话,可以使用VirtualBox或者VMware安装的虚拟机器操作,建议配置如下
(1)操作系统:centos 7,64位
(2)内存:建议内存给2G以上
(3)cpu:建议给2核以上
2 yum安装
2.1 步骤
(1)关闭防火墙
systemctl stop firewalld
systemctl disable firewalld
(2)安装etcd和kubernetes软件
yum -y install etcd kubernetes
ps: docker 会被自动安装,无需再次安装docker
(3)修改docker以及kubernetes配置
docker配置文件/etc/sysconfig/docker, OPTIONS 参数改为一下内容
OPTIONS='--selinux-enabled=false --log-driver=journald --signature-verification=false --insecure-registry gcr.io'
kubernetes apiserver配置文件/etc/kubernetes/apiserver, 将KUBE_ADMISSION_CONTROL参数中的 ServiceAccount 去掉
Ps:养成好习惯,改之前先将原文件备份
(4)配置国内网络加速
创建/etc/docker/daemon.json文件,并添加如下配置
{
"registry-mirrors": [
"https://ung2thfc.mirror.aliyuncs.com",
"https://registry.docker-cn.com",
"http://hub-mirror.c.163.com",
"https://docker.mirrors.ustc.edu.cn"
}
(5)启动服务
systemctl start etcd
systemctl start docker
systemctl start kube-apiserver
systemctl start kube-controller-manager
systemctl start kube-scheduler
systemctl start kubelet
systemctl start kube-proxy
2.2 报错处理
由于环境不一样,可能会遇到以下问题
(1)拉取pod-infrastructure镜像认证失败
现象:
Sep 17 04:15:02 init dockerd-current: time="2022-09-17T04:15:02.889226258-04:00" level=error msg="Handler for GET /v1.26/images/registry.access.redhat.com/rhel7/pod-infrastructure:latest/json returned error: No such image: registry.access.redhat.com/rhel7/pod-infrastructure:latest"
Sep 17 04:15:02 init kubelet: E0917 04:15:02.890596 4281 docker_manager.go:2159] Failed to create pod infra container: ImagePullBackOff; Skipping pod "mysql-t9268_default(97d68d91-365f-11ed-8c24-000c290ac12a)": Back-off pulling image "registry.access.redhat.com/rhel7/pod-infrastructure:latest"