Docker：docker infoでDockerの状態を確認する方法

docker infoでDockerの状態を確認する方法

Dockerの状態を確認するには、docker infoコマンドを実行します。

コマンドの説明

$ docker info --help

Usage:  docker info [OPTIONS]

Display system-wide information

Options:
  -f, --format string   Format the output using the given Go templaters

実行例

$ docker info
Client:
 Debug Mode: false

Server:
 Containers: 1
  Running: 0
  Paused: 0
  Stopped: 1
 Images: 20
 Server Version: 19.03.8
 Storage Driver: overlay2
  Backing Filesystem: 
  Supports d_type: true
  Native Overlay Diff: true
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 7ad184331fa3e55e52b890ea95e65ba581ae3429
 runc version: dc9208a3303feef5b3839f4323d9beb36df0a9dd
 init version: fec3683
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 3.10.0-1062.18.1.el7.x86_64
 Operating System: CentOS Linux 7 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 1
 Total Memory: 2.779GiB
 Name: localhost.localdomain
 ID: KWMM:V4OK:UARR:KUOL:6ILO:C4N4:HOF4:HY3C:RVUQ:TB3W:XTFW:2V4B
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

Dockerデーモンが起動していない場合は以下のようなエラーが表示されます。

$ docker info
Client:
Debug Mode: false

Server:
ERROR: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
errors pretty printing info