yum install wget wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo yum list docker-ce --showduplicates|sort -r yum install docker-ce docker-ce-cli containerd.io systemctl start docker systemctl status docker -l docker run hello-world systemctl 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 <<EOF FROM busybox CMD echo "Hello world! This is my first Docker image." EOF docker login 如果没有打a1这个标签，默认就是latest docker build -t createyuan/my-first:a1 . 最后要加上一个dockerfile文件的路径，在当前目录下，也要指定./，不然报错 加速一下（配置国内镜像站点），不然会报TLS handshake timeout错误 echo "DOCKER_OPTS="--registry-mirror=https://registry.docker-cn.com"" >> /etc/default/docker systemctl status docker -l systemctl restart docker systemctl status docker -l docker 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: 527 docker push createyuan/my-first:a1 The push refers to repository [docker.io/createyuan/my-first] d1156b98822d: Mounted from library/busybox a1: digest: sha256:5738039995376e9eac8be145ffde81fe5781f6385406cd2c2deb7352e940369e size: 527 ========================= 删除本地的镜像 docker image ls docker rmi -f e3303b21e364 或者 docker rmi -f createyuan/my-first:a1 Untagged: createyuan/my-first:a1 Untagged: createyuan/my-first@sha256:5738039995376e9eac8be145ffde81fe5781f6385406cd2c2deb7352e940369e Deleted: sha256:e3303b21e364adb0df734ac558f07cfcaeab1e4d6a5db87d4b03fcd90a2d37bb 运行，结果就是重新拉取镜像 docker run createyuan/my-first:a1 Unable to find image 'createyuan/my-first:a1' locally a1: Pulling from createyuan/my-first 53071b97a884: Already exists Digest: sha256:5738039995376e9eac8be145ffde81fe5781f6385406cd2c2deb7352e940369e Status: Downloaded newer image for createyuan/my-first:a1 Hello 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