yum install wgetwget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repoyum list docker-ce --showduplicates|sort -ryum install docker-ce docker-ce-cli containerd.iosystemctl start dockersystemctl status docker -ldocker run hello-worldsystemctl enable docker=======================docker info=======================这就是完整的过程编辑dockerfile文件》登录公共registry》build》本地运行》推送》其它机器拉取cat > Dockerfile <
     
      > /etc/default/dockersystemctl status docker -lsystemctl restart dockersystemctl status docker -ldocker build -t createyuan/my-first:a1 .docker run createyuan/my-first:a1有时推送不成功，多试几次，试了三次第一次net/http: TLS handshake timeout第二次read tcp 192.168.7.201:41794->104.18.124.25:443: read: connection reset by peer第三次a1: digest: sha256:5738039995376e9eac8be145ffde81fe5781f6385406cd2c2deb7352e940369e size: 527docker push createyuan/my-first:a1The push refers to repository [docker.io/createyuan/my-first]d1156b98822d: Mounted from library/busyboxa1: digest: sha256:5738039995376e9eac8be145ffde81fe5781f6385406cd2c2deb7352e940369e size: 527=========================删除本地的镜像docker image lsdocker rmi -f e3303b21e364或者docker rmi -f createyuan/my-first:a1Untagged: createyuan/my-first:a1Untagged: createyuan/my-first@sha256:5738039995376e9eac8be145ffde81fe5781f6385406cd2c2deb7352e940369eDeleted: sha256:e3303b21e364adb0df734ac558f07cfcaeab1e4d6a5db87d4b03fcd90a2d37bb运行，结果就是重新拉取镜像docker run createyuan/my-first:a1Unable to find image 'createyuan/my-first:a1' locallya1: Pulling from createyuan/my-first53071b97a884: Already existsDigest: sha256:5738039995376e9eac8be145ffde81fe5781f6385406cd2c2deb7352e940369eStatus: Downloaded newer image for createyuan/my-first:a1Hello world! This is my first Docker image.=============================构建第二个版本docker build -t createyuan/my-first:a2 .推送第二个版本docker push createyuan/my-first:a2运行docker run createyuan/my-first:a2