docker 学习笔记（三）
生成镜像
基于容器生成镜像
修改镜像 tag
[root@test ~]# docker tag --help
Usage: docker tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[:TAG]
Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
Options:
--help Print usage
[root@test ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/busybox 1.0 219ee5171f80 3 weeks ago 1.23 MB
[root@test ~]# docker tag docker.io/busybox:1.0 docker.io/busybox:latest
[root@test ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/busybox 1.0 219ee5171f80 3 weeks ago 1.23 MB
docker.io/busybox latest 219ee5171f80 3 weeks ago 1.23 MB
基于容器生成镜像
[root@test ~]# docker commit --help
\
Usage: docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]
Create a new image from a container's changes
Options:
-a, --author string Author (e.g., "John Hannibal Smith <hannibal@a-team.com>")
-c, --change list Apply Dockerfile instruction to the created image (default [])
--help Print usage
-m, --message string Commit message
-p, --pause Pause container during commit (default true)
| 名字，简写 | 默认 | 描述 |
|---|---|---|
| --author, -a | 作者（例如，“John Hannibal Smith hannibal@a-team.com”） | |
| --change, -c | 将 Dockerfile 指令应用于创建的映像 | |
| --message, -m | 提交消息 | |
| --pause, -p | true | 在提交期间暂停容器 |
--change 选项将对 Dockerfile 创建的图像应用说明。支持的 Dockerfile 说明：CMD| ENTRYPOINT| ENV| EXPOSE| LABEL| ONBUILD| USER| VOLUME|WORKDIR
[root@test ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
0bda47a24768 docker.io/busybox:latest "sh" 18 seconds ago Up 17 seconds busy1
[root@test ~]# docker commit -p busy1 docker.io/busybox:1.1
sha256:96279759b10a9b667967a691016c5df1452546067d13ac4fab91e8cd1c17478b
[root@test ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/busybox 1.1 96279759b10a 12 seconds ago 1.23 MB
docker.io/busybox 1.0 219ee5171f80 3 weeks ago 1.23 MB
docker.io/busybox latest 219ee5171f80 3 weeks ago 1.23 MB
[root@test ~]# docker commit --change='CMD ["apachectl", "-DFOREGROUND"]' -c "EXPOSE 80" c3f279d17e0a svendowideit/testimage:version4
f5283438590d
镜像的导出
[root@test ~]# docker save --help
Usage: docker save [OPTIONS] IMAGE [IMAGE...]
Save one or more images to a tar archive (streamed to STDOUT by default)
Options:
--help Print usage
-o, --output string Write to a file, instead of STDOUT
[root@test ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/busybox 1.1 96279759b10a 43 minutes ago 1.23 MB
[root@test ~]# docker save -o busybox1.1.gz docker.io/busybox:1.1
[root@test ~]# ls
anaconda-ks.cfg busybox1.1.gz
镜像的导入
[root@test ~]# docker load --help
Usage: docker load [OPTIONS]
Load an image from a tar archive or STDIN
Options:
--help Print usage
-i, --input string Read from tar archive file, instead of STDIN
-q, --quiet Suppress the load output
[root@test ~]# docker load -i busybox1.1.gz
Loaded image: docker.io/busybox:1.1