docker删除镜像

1、说明

对于docker镜像，尤其是开发应用构建的镜像，如果需要重新build镜像，而不改变原有版本号，则需要将原有dokcer镜像删除。删除命令很简单：docke rmi 镜像id。但有些场景直接删除会报如下错误。

$ docker rmi  42e04
Error response from daemon: conflict: unable to delete 42e04f0f9df2 (must be forced) - image is being used by stopped container 6503618ff193

例如以下场景会报错：

• 镜像运行的容器还在运行
• 镜像生产的容器还存在（未运行）。

2、删除方式

（1）查看运行的容器，只能查看正在运行的容易

$ docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES

（2）如果存在运行容器，则停止运行容器，使用: docker stop 容器id。
（3）如果没有，则使用docker ps -a方式查看未运行的容器。

$ docker ps -a
CONTAINER ID   IMAGE                       COMMAND                  CREATED          STATUS                      PORTS                               NAMES
6503618ff193   goon-dance-admin:1.0        "java -jar goon-danc…"   12 minutes ago   Exited (1) 12 minutes ago                                       goon-admin
c5996e7a5ecc   redis:alpine3.17            "docker-entrypoint.s…"   42 hours ago     Exited (255) 18 hours ago   0.0.0.0:6389->6379/tcp              redis-6389
d115623fada2   mysql/mysql-server:5.7.22   "/entrypoint.sh --ch…"   7 months ago     Exited (255) 7 weeks ago    0.0.0.0:3306->3306/tcp, 33060/tcp   mysql01
bf18c2fb05cb   alpine/git                  "git clone https://g…"   7 months ago     Exited (128) 7 months ago                                       repo

（4）删除容器：docker rm 容器id

$ docker rm 6503618ff193
6503618ff193

（5）查看要删除的镜像id：docker ps

$ docker images
REPOSITORY           TAG          IMAGE ID       CREATED          SIZE
goon-dance-admin     1.0          42e04f0f9df2   15 minutes ago   643MB
redis                alpine3.17   1339d05b97a4   3 weeks ago      30.4MB
alpine/git           latest       f404a400c0ad   8 months ago     39.5MB
mysql/mysql-server   5.7.22       3cc9613ef3ba   4 years ago      244MB

（6）删除镜像：docker rmi 镜像id

$ docker rmi 42e04f
Untagged: goon-dance-admin:1.0
Deleted: sha256:42e04f0f9df2d13bb23af6cfef9d60234ad5d3a1f8f6a5a76bcef4812736af87