docker镜像操作
[root@hecs-74102 ~]# docker image --help
Usage: docker image COMMAND
Manage images
Commands:
build Build an image from a Dockerfile
history Show the history of an image
import Import the contents from a tarball to create a filesystem image
inspect Display detailed information on one or more images
load Load an image from a tar archive or STDIN
ls List images
prune Remove unused images
pull Download an image from a registry
push Upload an image to a registry
rm Remove one or more images
save Save one or more images to a tar archive (streamed to STDOUT by default)
tag Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
Run 'docker image COMMAND --help' for more information on a command.
镜像查找
语法 docker search 镜像：标签（指定版本）
描述 查找仓库的可用镜像
[root@hecs-74102 ~]# docker search redis
NAME（镜像名称） DESCRIPTION（描述信息） STARS（点赞数） OFFICIAL（官方认证的） AUTOMATED（官方自动化流程构建的，意义不大）
redis Redis is an open source key-value store that… 12503 [OK]
redislabs/redisearch Redis With the RedisSearch module pre-loaded… 61
redislabs/redisinsight RedisInsight - The GUI for Redis 94
redis/redis-stack-server redis-stack-server installs a Redis server w… 62
redis/redis-stack redis-stack installs a Redis server with add… 82
redislabs/rebloom A probablistic datatypes module for Redis 25 [OK]
拉取镜像到本地
语法 docker pull nginx:1.20.1
镜像名称：版本号（标签）//默认可以不添加标签表示最新
[root@hecs-74102 ~]# docker pull redis
Using default tag: latest
latest: Pulling from library/redis
1f7ce2fa46ab: Pull complete
3c6368585bf1: Pull complete
3911d271d7d8: Pull complete
ac88aa9d4021: Pull complete
127cd75a68a2: Pull complete
4f4fb700ef54: Pull complete
f3993c1104fc: Pull complete
Digest: sha256:2976bc0437deff693af2dcf081a1d1758de8b413e6de861151a5a136c25eb9e4
Status: Downloaded newer image for redis:latest
docker.io/library/redis:latest
查看本地镜像
语法 docker images
语法 docker image ls
[root@hecs-74102 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
redis latest 961dda256baa 2 weeks ago 138MB
openresty 1.21.4.1-2-buster-fat 61a7383111bc 17 months ago 136MB
openjdk 8-jdk-oracle 5783fe09fd20 23 months ago 359MB
nginx 1.20.1 c8d03f6b8b91 2 years ago 133MB
删除镜像
语法 docker rmi 镜像ID
语法 docker image rm 镜像ID
批量删除 docker images -q -a | xargs docker rmi 或 docker rmi $(docker images -q -a)
[root@hecs-74102 ~]# docker rmi 961dda256baa
Untagged: redis:latest
Untagged: redis@sha256:2976bc0437deff693af2dcf081a1d1758de8b413e6de861151a5a136c25eb9e4
Deleted: sha256:961dda256baa7a35297d34cca06bc2bce8397b0ef8b68d8064c30e338afc5a7d
Deleted: sha256:09f4ac3c2997331779d99bc625d4224756d374ae83b6aff36784e60a172e3150
Deleted: sha256:a515e0e35074ce754676135fba9991adcd13ec0cb1c828e3fb10120696c098f0
Deleted: sha256:c0e7da6567edbdff320fe4b4cd930466d448bfec67e21dcc4546ef03a9567c63
Deleted: sha256:2880e2e2c6fde92bdbeb7b7f4fa0311de5c14a6f6fa81a970d2a8ac266246398
Deleted: sha256:acf561667659ef44a6073d3f87952952d58a8c8638fff9d0e11af01db02c0855
Deleted: sha256:695fd6f5bcc5701e6e92f5e6acea3ffc272f7a38e4919d959d52c287264a23ff
Deleted: sha256:92770f546e065c4942829b1f0d7d1f02c2eb1e6acf0d1bc08ef0bf6be4972839
[root@hecs-74102 ~]#
删除镜像2
prune删除所有未被 tag 标记和未被容器使用的镜像
[root@hecs-74102 ~]# docker image prune
WARNING! This will remove all dangling images.
Are you sure you want to continue? [y/N]
镜像标签操作
描述 标签用于区分版本，在很多场景中也用于区分不同仓库地址，如相同的仓库下的不同名称空间等。
语法 docker tag [{镜像名称}:{版本名称}] swr.cn-north-4.myhuaweicloud.com/{组织名称}/{镜像名称}:{版本名称}
[root@hecs-74102 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
redis latest 961dda256baa 2 weeks ago 138MB
[root@hecs-74102 ~]# docker tag redis www.harbor.cn/test-namespace/redis:7.0.0
[root@hecs-74102 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
redis latest 961dda256baa 2 weeks ago 138MB
www.harbor.cn/test-namespace/redis 7.0.0 961dda256baa 2 weeks ago 138MB
登录仓库
语法 docker login -u 用户 -p 密码 仓库地址
描述 用于拉取仓库中镜像，或者上传镜像时登录仓库
# 可先用 docker info 查看当前登录仓库
[root@hecs-74102 ~]# docker login -u xxxx -p xxxx swrwvxxx.xx.myhuaweicloud.com
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
上传镜像
语法 docker push 镜像：版本
描述 将本地制作好的镜像或保存的镜像上传到仓库中
sudo docker push swr.xxxxx.myhuaweicloud.com/{组织名称}/{镜像名称}:{版本名称}
查看镜像详细描述信息
描述 查看镜像分层 网络等详细信息
[root@hecs-74102 ~]# docker inspect 961dda256baa #镜像ID
查看镜像构建历史（流程或分层信息）
语法 docker image history 镜像ID 或 docker history 镜像ID # 此时为缩写docker的很多命令均可缩写
[root@hecs-74102 ~]# docker history 961dda256baa
IMAGE CREATED CREATED BY SIZE COMMENT
961dda256baa 2 weeks ago CMD ["redis-server"] 0B buildkit.dockerfile.v0
<missing> 2 weeks ago EXPOSE map[6379/tcp:{}] 0B buildkit.dockerfile.v0
<missing> 2 weeks ago ENTRYPOINT ["docker-entrypoint.sh"] 0B buildkit.dockerfile.v0
<missing> 2 weeks ago COPY docker-entrypoint.sh /usr/local/bin/ # … 661B buildkit.dockerfile.v0
<missing> 2 weeks ago WORKDIR /data 0B buildkit.dockerfile.v0
<missing> 2 weeks ago VOLUME [/data] 0B buildkit.dockerfile.v0
<missing> 2 weeks ago RUN /bin/sh -c mkdir /data && chown redis:re… 0B buildkit.dockerfile.v0
<missing> 2 weeks ago RUN /bin/sh -c set -eux; savedAptMark="$(a… 58.8MB buildkit.dockerfile.v0
<missing> 2 weeks ago ENV REDIS_DOWNLOAD_SHA=3e2b196d6eb4ddb9e7430… 0B buildkit.dockerfile.v0
<missing> 2 weeks ago ENV REDIS_DOWNLOAD_URL=http://download.redis… 0B buildkit.dockerfile.v0
<missing> 2 weeks ago ENV REDIS_VERSION=7.2.3 0B buildkit.dockerfile.v0
<missing> 2 weeks ago RUN /bin/sh -c set -eux; savedAptMark="$(ap… 4.13MB buildkit.dockerfile.v0
<missing> 2 weeks ago ENV GOSU_VERSION=1.16 0B buildkit.dockerfile.v0
<missing> 2 weeks ago RUN /bin/sh -c groupadd -r -g 999 redis && u… 4.3kB buildkit.dockerfile.v0
<missing> 2 weeks ago /bin/sh -c #(nop) CMD ["bash"] 0B
<missing> 2 weeks ago /bin/sh -c #(nop) ADD file:d261a6f6921593f1e… 74.8MB
镜像的导入导出
描述 用于镜像的转存，通常导出为tar包再导入到其他主机内
导出语法 docker docker save > 指定命名的tar包 源镜像：版本
导入语法 docker load -i 需要导入的镜像tar包
# docker docker save > myredis.tar www.harbor.cn/test-namespace/redis:7.0.0
# docker load -i myredis.tar
镜像的导入导出2
描述 除了load与save外我们还有import与export可用导入导出镜像
导入语法 docker import xxx.tar newname:tag
导出语法 docker export 需要的tar文件 源镜像