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Cobra allows for aliases to be defined for a command, but only allows these to be defined at the same level (for example, `docker image ls` as alias for `docker image list`). Our CLI has some commands that are available both as a top-level shorthand as well as `docker <object> <verb>` subcommands. For example, `docker ps` is a shorthand for `docker container ps` / `docker container ls`. This patch introduces a custom "aliases" annotation that can be used to print all available aliases for a command. While this requires these aliases to be defined manually, in practice the list of aliases rarely changes, so maintenance should be minimal. As a convention, we could consider the first command in this list to be the canonical command, so that we can use this information to add redirects in our documentation in future. Before this patch: docker images --help Usage: docker images [OPTIONS] [REPOSITORY[:TAG]] List images Options: -a, --all Show all images (default hides intermediate images) ... With this patch: docker images --help Usage: docker images [OPTIONS] [REPOSITORY[:TAG]] List images Aliases: docker image ls, docker image list, docker images Options: -a, --all Show all images (default hides intermediate images) ... Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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title, description, keywords
title | description | keywords |
---|---|---|
port | The port command description and usage | port, mapping, container |
port
Usage: docker port CONTAINER [PRIVATE_PORT[/PROTO]]
List port mappings or a specific mapping for the container
Aliases:
docker container port, docker port
Options:
--help Print usage
Examples
Show all mapped ports
You can find out all the ports mapped by not specifying a PRIVATE_PORT
, or
just a specific mapping:
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b650456536c7 busybox:latest top 54 minutes ago Up 54 minutes 0.0.0.0:1234->9876/tcp, 0.0.0.0:4321->7890/tcp test
$ docker port test
7890/tcp -> 0.0.0.0:4321
9876/tcp -> 0.0.0.0:1234
$ docker port test 7890/tcp
0.0.0.0:4321
$ docker port test 7890/udp
2014/06/24 11:53:36 Error: No public port '7890/udp' published for test
$ docker port test 7890
0.0.0.0:4321