Docker commit

该命令用于提交现有 container 为镜像, 以便更好的复用和保存数据
https://docs.docker.com/reference/cli/docker/container/commit

Basic Usage

docker container commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]

docker commit <container_id> <image_name> [-a <author>] [-m <message>] [-c <change>] [-p pauseContainer? (default: true)]

若要提交为本地镜像, image_name 请置为 myImage:myTag 而非 username/myImage:myTag

Example

docker commit myContainer myImage:myTag

Use local image

1. Run local Docker Registry (at localhost:5000)

docker run -d -p 5000:5000 --restart=always --name registry registry:2

2. Add the tag to local registry

docker tag <myImage>[:<myTag>] localhost:<any-port>/<any-name>[:<any-tag>]

Your image name: localhost:5000/<any-name>[:<any-tag>]

See Also

https://docs.docker.com/reference/compose-file/services/#pull_policy

# 从不拉取，如果本地不存在则报错
pull_policy: never
# -----------------------------
# 始终都会拉取
pull_policy: always
# 本地不存在时拉取
pull_policy: missing
# 如果已存在，重构镜像
pull_policy: build