[docker]docker命令 docker inspect
docker inspect
Estimated reading time: 2 minutesDescription
Return low-level information on Docker objects
Usage
docker inspect [OPTIONS] NAME|ID [NAME|ID...]
Options
| Name, shorthand | Default | Description |
|---|---|---|
--format, -f | Format the output using the given Go template | |
--size, -s | false | Display total file sizes if the type is container |
--type | Return JSON for specified type |
Parent command
| Command | Description |
|---|---|
| docker | The base command for the Docker CLI. |
Extended description
By default, docker inspect will render all results in a JSON array. If the container and image have the same name, this will return container JSON for unspecified type. If a format is specified, the given template will be executed for each result.
Go’s text/template package describes all the details of the format.
Examples
Get an instance’s IP address
For the most part, you can pick out any field from the JSON in a fairly straightforward manner.
$ docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $INSTANCE_ID
Get an instance’s MAC address
$ docker inspect --format='{{range .NetworkSettings.Networks}}{{.MacAddress}}{{end}}' $INSTANCE_ID
Get an instance’s log path
$ docker inspect --format='{{.LogPath}}' $INSTANCE_ID
Get an instance’s image name
$ docker inspect --format='{{.Config.Image}}' $INSTANCE_ID
List all port bindings
You can loop over arrays and maps in the results to produce simple text output:
$ docker inspect --format='{{range $p, $conf := .NetworkSettings.Ports}} {{$p}} -> {{(index $conf 0).HostPort}} {{end}}' $INSTANCE_ID
Find a specific port mapping
The .Field syntax doesn’t work when the field name begins with a number, but the template language’s index function does. The .NetworkSettings.Ports section contains a map of the internal port mappings to a list of external address/port objects. To grab just the numeric public port, you use index to find the specific port map, and then index 0 contains the first object inside of that. Then we ask for the HostPort field to get the public address.
$ docker inspect --format='{{(index (index .NetworkSettings.Ports "8787/tcp") 0).HostPort}}' $INSTANCE_ID
Get a subsection in JSON format
If you request a field which is itself a structure containing other fields, by default you get a Go-style dump of the inner values. Docker adds a template function, json, which can be applied to get results in JSON format.
$ docker inspect --format='{{json .Config}}' $INSTANCE_ID