show info

[!TIP|label:references:]
Format command and log output
Format the output (--format)

docker ps

PLACEHOLDER

DESCRIPTION

.ID

Container ID

.Image

Image ID

.Command

Quoted command

.CreatedAt

Time when the container was created.

.RunningFor

Elapsed time since the container was started.

.Ports

Exposed ports.

.State

Container status (for example; "created", "running", "exited").

.Status

Container status with details about duration and health-status.

.Size

Container disk size.

.Names

Container names.

.Labels

All labels assigned to the container.

.Label

Value of a specific label for this container. For example '{{.Label "com.docker.swarm.cpu"}}'

.Mounts

Names of the volumes mounted in this container.

.Networks

Names of the networks attached to this container.

original

$ docker ps -a --filter 'status=exited' | head -2
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                      PORTS               NAMES
5e5f59e3aff3        3129a2ca29d7        "/configmap-reload -…"   2 months ago        Exited (137) 2 months ago                       k8s_rules-configmap-reloader_prometheus-k8s-0_monitoring_aeba5164-dda4-11ec-b785-0cc47aff0b92_1

via foramt

$ docker ps -f 'status=exited' --format 'table {{.ID}}\t{{.Image}}\t{{.Command}}\t{{.RunningFor}}\t{{.Status}}\t{{.Ports}}\t{{.Names}}' | head -2
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                      PORTS               NAMES
5e5f59e3aff3        3129a2ca29d7        "/configmap-reload -…"   2 months ago        Exited (137) 2 months ago                       k8s_rules-configmap-reloader_prometheus-k8s-0_monitoring_aeba5164-dda4-11ec-b785-0cc47aff0b92_1

docker list

sort by image size

$ docker images --format "{{.ID}}\t{{.Size}}\t{{.Repository}}:{{.Tag}}" | sort -k 2 -hr

docker inspect

reference:
docker inspect
See full command of running/stopped container in Docker
Docker remove TAG images
Return container settings in JSON format

show docker image

$ docker inspect 5b4299c238e5 -f '{{ .Config.Image }}'

show entrypoint

$ docker inspect -f "{{.Path}} {{.Args}} ({{.Id}})" $(docker ps -a -q)

or list only

$ docker inspect -f "{{.Path}} {{.Args}} ({{.Id}})" <name>

i.e.:

$ docker inspect -f "{{.Path}} {{.Args}} ({{.Id}})" bf6f6d166b88
/usr/bin/tini [-- /usr/local/bin/jenkins.sh] (bf6f6d166b88ed9695b89d859ddc1feb7d2deaf07c64352ad479645b707e0157)

list environment

$ docker inspect \
         --format='{{ .Name }}{{ printf "\n" }}{{ range .Config.Env }}{{ printf "\n\t" }}{{ printf . }}{{ end }}' \
         <containerID>

check mounts

$ docker inspect \
         --format='{{ .Name }}{{ printf "\n" }}{{ range .HostConfig.Binds }}{{ printf "\n\t" }}{{ printf . }}{{ end }}' \
         <containerID>

i.e.:

$ docker inspect \
         --format='{{ .Name }}{{ printf ":\n" }}{{ range .HostConfig.Binds }}{{ printf "\n\t" }}{{ printf . }}{{ end }}' \
         <containerID>
/k8s_jnlp-s31sk-1rvd0_060d5260-8b42-11ed-9c0f-b883034b82d0_0:

  /var/lib/kubelet/pods/060d5260-8b42-11ed-9c0f-b883034b82d0/volumes/kubernetes.io~empty-dir/workspace-volume:/home/marslo
  /var/lib/kubelet/pods/060d5260-8b42-11ed-9c0f-b883034b82d0/volumes/kubernetes.io~secret/default-token-m6bqf:/var/run/secrets/kubernetes.io/serviceaccount:ro
  /var/lib/kubelet/pods/060d5260-8b42-11ed-9c0f-b883034b82d0/etc-hosts:/etc/hosts
  /var/lib/kubelet/pods/060d5260-8b42-11ed-9c0f-b883034b82d0/containers/jnlp/1d0c9319:/dev/termination-log

$ docker inspect \
        -f '{{ .Name }}{{ printf ":\n" }}{{ range .Mounts }}{{ printf "\n\t" }}{{ .Type }}{{ printf "\t" }}{{ if eq .Type "bind" }}{{ .Source }}{{ end }}{{ .Name }} => {{ .Destination }}{{ end }}{{ printf "\n" }}' \
        8e59c4dd2f65
/k8s_jnlp-s31sk-1rvd0_060d5260-8b42-11ed-9c0f-b883034b82d0_0:

  bind    /var/lib/kubelet/pods/060d5260-8b42-11ed-9c0f-b883034b82d0/volumes/kubernetes.io~secret/default-token-m6bqf => /var/run/secrets/kubernetes.io/serviceaccount
  volume  6c18dbf9b131a9fb245fe896a56b4f4db33f3f32eb1f2b3fcc10c5e50baf7e4f => /home/devops/.jenkins
  bind    /var/lib/kubelet/pods/060d5260-8b42-11ed-9c0f-b883034b82d0/volumes/kubernetes.io~empty-dir/workspace-volume => /home/devops
  bind    /var/lib/kubelet/pods/060d5260-8b42-11ed-9c0f-b883034b82d0/etc-hosts => /etc/hosts
  bind    /var/lib/kubelet/pods/060d5260-8b42-11ed-9c0f-b883034b82d0/containers/jnlp/1d0c9319 => /dev/termination-log
  volume  69c10d1602dc0af1ad305f21ec74f5c568a735c18c64b7b0cb5e04120159e2bd => /home/devops/.ssh
  volume  02668c553b25d1b3f5ba51c85885fab6abf74296a4c0393d35006737d543a174 => /home/devops/agent

$ docker container inspect \
         -f '{{ range .Mounts }}{{ .Type }} : {{ .Source }}:{{ .Destination }}{{ println }}{{  end  }}' \
         <containerID>

log path

[!TIP] how to redirect docker logs to a single file

$ docker inspect --format='{{.LogPath}}' containername

get full container ID

$ docker inspect --format="{{.Id}}" d40df87b2f87
d40df87b2f87261152d2541b870c6b801c031f8df969e4bd3e9b3c607e6c1698

check repo tag

$ docker images -q -a | xargs docker inspect --format='{{.Id}}{{range $rt := .RepoTags}} {{$rt}} {{end}}'

docker stats

reference:
Monitor the Resource Usage of Docker Containers
See Memory and CPU Usage for All Your Docker Containers
How to See Memory and CPU Usage for All Your Docker Containers (on CentOS 6)
How to Monitor the Resource Usage of Docker Containers

$ docker stats --format "table {{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}" <CONTAINER_ID>

# or show all
$ docker ps -q | xargs  docker stats --no-stream

docker system

df

$ docker system df
TYPE            TOTAL     ACTIVE    SIZE      RECLAIMABLE
Images          5         1         9.81GB    8.384GB (85%)
Containers      1         0         0B        0B
Local Volumes   4449      4         172.2GB   156.7GB (90%)
Build Cache     0         0         0B        0B

events

$ docker system events --since '24h'

prune

$ docker system prune --all
WARNING! This will remove:
        - all stopped containers
        - all networks not used by at least one container
        - all dangling images
        - all build cache
Are you sure you want to continue? [y/N] y

# prune volume only
$ docker system prune --volumes

ps format

$ docker ps -a --format 'CONTAINER ID : {{.ID}} | Name: {{.Names}} | Image:  {{.Image}} |  Ports: {{.Ports}}'

id and command

$ docker ps --no-trunc --format "{{.ID}}: {{.Command}}"

id, image and commands

$ docker ps --no-trunc --format "{{.ID}}: {{.Command}}: {{.Image}}"

log path
[!NOTE] how to redirect docker logs to a single file
```
$ docker inspect --format='{{.LogPath}}' containername
```

with table

$ docker ps --format "table {{.Image}}\t{{.Names}}\t{{.Ports}}\t{{.Status}}"

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Last updated 1 year ago

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