前言

由于docker市场的centos 镜像各种命令没有，所以自己制作centos镜像

环境准备

1. 系统已经安装好docker
2. 配置好docker镜像仓库

安装步骤

步骤1：制作镜像

1 拉取基础镜像
docker pull centos
2 进入容器
docker run  -it centos
3 配置仓库yum阿里云镜像
下载 repo文件：https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
4 配置镜像源 
#删除默认数据源
[root@61eb2710895c yum.repos.d]# rm -rf /etc/yum.repos.d/*
[root@61eb2710895c yum.repos.d]# vi CentOS-Base.repo 
输入Centos-vault-8.5.2111.repo所有内容
[root@61eb2710895c yum.repos.d]# yum clean all  && yum makecache
5 安装常用工具
[root@61eb2710895c yum.repos.d]# yum install -y  telnet wget
#nslookup
[root@61eb2710895c yum.repos.d]# yum install -y bind-utils
#ifconfig
[root@61eb2710895c yum.repos.d]# yum install -y net-tools 
#lsof
yum install -y lsof
#nginx 一定要装这个哦。要不部署k8s后无法启动容器
yum install -y nginx
/usr/sbin/nginx
6 退出容器
exit

步骤2：commit镜像

[root@localhost ~]# docker ps -a | grep centos
CONTAINER ID   IMAGE            COMMAND         CREATED             STATUS           PORTS NAMES
dc4974ce5b20   457400968e53     "/bin/bash"     About a minute ago  Exited...

#606aced135ff 
[root@localhost ~]# docker commit dc4974ce5b20   mycentos:v1
#查看
[root@localhost ~]#docker images | grep mycentos 

#至此 镜像制作完成

推送阿里云镜像私仓

[root@my-master ~]# docker tag nit-centos:v1 registry.cn-hangzhou.aliyuncs.com/nit/nit_centos:v1
[root@my-master ~]# docker push registry.cn-hangzhou.aliyuncs.com/nit/nit_centos:v1

k8s就可以从仓阿里云私仓库部署pod了

kind: Pod
apiVersion: v1
metadata:
  name: nit-centos-0
  generateName: nit-centos-
  namespace: nit-middle-ware
  labels:
    app: nit-centos
    controller-revision-hash: nit-centos-69595659d7
    statefulset.kubernetes.io/pod-name: nit-centos-0
  annotations:
    cni.projectcalico.org/containerID: 82b871e5f34dedbc1a60bb7ef2717b05a3e9ff0ccd5b31b5174d9fc9b4b09363
    cni.projectcalico.org/podIP: 10.233.67.2/32
    cni.projectcalico.org/podIPs: 10.233.67.2/32
    kubesphere.io/creator: admin
    kubesphere.io/imagepullsecrets: '{"container-2v0ubi":"nit-harbor"}'
spec:
  volumes:
    - name: host-time
      hostPath:
        path: /etc/localtime
        type: ''
    - name: kube-api-access-5dnwn
      projected:
        sources:
          - serviceAccountToken:
              expirationSeconds: 3607
              path: token
          - configMap:
              name: kube-root-ca.crt
              items:
                - key: ca.crt
                  path: ca.crt
          - downwardAPI:
              items:
                - path: namespace
                  fieldRef:
                    apiVersion: v1
                    fieldPath: metadata.namespace
        defaultMode: 420
  containers:
    - name: container-2v0ubi
      image: 'registry.cn-hangzhou.aliyuncs.com/nit/nit_centos:v1'
      #启动容器nginx挂起，要不会一直自动重启
      command:
        - /usr/sbin/nginx
      args:
        - '-g'
        - daemon off;
      ports:
        - name: http-0
          containerPort: 80
          protocol: TCP
      resources: {}
      volumeMounts:
        - name: host-time
          readOnly: true
          mountPath: /etc/localtime
        - name: kube-api-access-5dnwn
          readOnly: true
          mountPath: /var/run/secrets/kubernetes.io/serviceaccount
      terminationMessagePath: /dev/termination-log
      terminationMessagePolicy: File
      imagePullPolicy: IfNotPresent
  restartPolicy: Always
  terminationGracePeriodSeconds: 30
  dnsPolicy: ClusterFirst
  serviceAccountName: default
  serviceAccount: default
  nodeName: my-master
  securityContext: {}
  imagePullSecrets:
    - name: nit-harbor
  hostname: nit-centos-0
  subdomain: nit-centos-55if
  schedulerName: default-scheduler
  tolerations:
    - key: node.kubernetes.io/not-ready
      operator: Exists
      effect: NoExecute
      tolerationSeconds: 300
    - key: node.kubernetes.io/unreachable
      operator: Exists
      effect: NoExecute
      tolerationSeconds: 300
  priority: 0
  enableServiceLinks: true
  preemptionPolicy: PreemptLowerPriority