Docker卸载镜像

Linux服务器Docker卸载某个镜像：

首先输入命令docker images查看当前docker下有多少镜像：

1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker images
2 REPOSITORY           TAG                 IMAGE ID            CREATED             SIZE
3 mysql                5.6                 a46c2a2722b9        4 days ago          256MB
4 hello-world          latest              4ab4c602aa5e        7 weeks ago         1.84kB
5 morunchang/fastdfs   latest              a729ac95698a        2 years ago         460MB

1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker images
2 REPOSITORY           TAG                 IMAGE ID            CREATED             SIZE
3 mysql                5.6                 a46c2a2722b9        4 days ago          256MB
4 hello-world          latest              4ab4c602aa5e        7 weeks ago         1.84kB
5 morunchang/fastdfs   latest              a729ac95698a        2 years ago         460MB

如上所示可以看到当前docker下有3个镜像：mysql、hello-world、morunchang/fastdfs，现在我们假设要删除hello-world这个镜像，使用如下流程以及命令：

使用命令docker ps -a查看当前运行下的镜像进程：

1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker ps -a
2 CONTAINER ID        IMAGE                COMMAND                  CREATED             STATUS                  PORTS                    NAMES
3 e061047acf6e        mysql:5.6            "docker-entrypoint.s…"   2 hours ago         Up 2 hours              0.0.0.0:3306->3306/tcp   mysqlserver
4 61c7a4d6363d        mysql:5.6            "docker-entrypoint.s…"   2 hours ago         Created                                          compassionate_varahamihira
5 024c06fcc1e8        morunchang/fastdfs   "sh storage.sh"          3 days ago          Up 3 days                                        storage
6 3f2da1b259b5        morunchang/fastdfs   "sh tracker.sh"          3 days ago          Up 3 days                                        tracker
7 c608062bf46f        hello-world          "/hello"                 4 days ago          Exited (0) 4 days ago                            priceless_keller

1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker ps -a
2 CONTAINER ID        IMAGE                COMMAND                  CREATED             STATUS                  PORTS                    NAMES
3 e061047acf6e        mysql:5.6            "docker-entrypoint.s…"   2 hours ago         Up 2 hours              0.0.0.0:3306->3306/tcp   mysqlserver
4 61c7a4d6363d        mysql:5.6            "docker-entrypoint.s…"   2 hours ago         Created                                          compassionate_varahamihira
5 024c06fcc1e8        morunchang/fastdfs   "sh storage.sh"          3 days ago          Up 3 days                                        storage
6 3f2da1b259b5        morunchang/fastdfs   "sh tracker.sh"          3 days ago          Up 3 days                                        tracker
7 c608062bf46f        hello-world          "/hello"                 4 days ago          Exited (0) 4 days ago                            priceless_keller

如上所示，我们看到hello-world相关的镜像信息如下：

1 c608062bf46f  hello-world  "/hello"  4 days ago   Exited (0) 4 days ago    priceless_keller

然后我们停止hello-world运行的进程，使用如下命令docker stop c608062bf46f：

1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker stop c608062bf46f
2 c608062bf46f

停止了镜像的运行后，就可以卸载了。使用命令docker rm c608062bf46f来删除这个镜像。

1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker rm c608062bf46f
2 c608062bf46f

这里的“c608062bf46f”是docker ps -a 里面的CONTAINER ID，然后这个镜像就进程就删除。

我们使用docker ps -a命令查看当前进程里面是否还有hello-world相关的进程：

1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker ps -a
2 CONTAINER ID        IMAGE                COMMAND                  CREATED             STATUS              PORTS                    NAMES
3 e061047acf6e        mysql:5.6            "docker-entrypoint.s…"   2 hours ago         Up 2 hours          0.0.0.0:3306->3306/tcp   mysqlserver
4 61c7a4d6363d        mysql:5.6            "docker-entrypoint.s…"   2 hours ago         Created                                      compassionate_varahamihira
5 024c06fcc1e8        morunchang/fastdfs   "sh storage.sh"          3 days ago          Up 3 days                                    storage
6 3f2da1b259b5        morunchang/fastdfs   "sh tracker.sh"          3 days ago          Up 3 days                                    tracker

此时发现没有hello-world相关的进程了。

这时我们使用docker images查看下镜像的IMAGE ID，进行最后的删除。

1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker images
2 REPOSITORY           TAG                 IMAGE ID            CREATED             SIZE
3 mysql                5.6                 a46c2a2722b9        4 days ago          256MB
4 hello-world          latest              4ab4c602aa5e        7 weeks ago         1.84kB
5 morunchang/fastdfs   latest              a729ac95698a        2 years ago         460MB

使用命令docker rmi 4ab4c602aa5e删除镜像：

1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker rmi 4ab4c602aa5e
2 Untagged: hello-world:latest
3 Untagged: hello-world@sha256:0add3ace90ecb4adbf7777e9aacf18357296e799f81cabc9fde470971e499788
4 Deleted: sha256:4ab4c602aa5eed5528a6620ff18a1dc4faef0e1ab3a5eddeddb410714478c67f
5 Deleted: sha256:428c97da766c4c13b19088a471de6b622b038f3ae8efa10ec5a37d6d31a2df0b

在使用docker images查看下是否删除掉了hello-world：

1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker images
2 REPOSITORY           TAG                 IMAGE ID            CREATED             SIZE
3 mysql                5.6                 a46c2a2722b9        4 days ago          256MB
4 morunchang/fastdfs   latest              a729ac95698a        2 years ago         460MB

此时可以看到，hello-world这个镜像删除成功了，已经没有hello-world这个镜像了。

其他的镜像删除也是使用同样的步骤。