Docker:Docker管理コマンド
目的
Dockerの管理に利用するコマンドについて個人的な備忘の為に記事を書く。
Docker管理コマンド
#Dockerバージョン確認 [root@localhost ~]# docker -v Docker version 1.12.3, build 6b644ec
#Docker状態の確認 [root@localhost ~]# docker info Containers: 8 Running: 0 Paused: 0 Stopped: 8 Images: 6 Server Version: 1.12.3 Storage Driver: devicemapper Pool Name: docker-253:3-1074561216-pool Pool Blocksize: 65.54 kB Base Device Size: 10.74 GB Backing Filesystem: xfs Data file: /dev/loop0 Metadata file: /dev/loop1 Data Space Used: 1.137 GB Data Space Total: 107.4 GB Data Space Available: 106.2 GB Metadata Space Used: 2.134 MB Metadata Space Total: 2.147 GB Metadata Space Available: 2.145 GB Thin Pool Minimum Free Space: 10.74 GB Udev Sync Supported: true Deferred Removal Enabled: false Deferred Deletion Enabled: false Deferred Deleted Device Count: 0 Data loop file: /var/lib/docker/devicemapper/devicemapper/data WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device. Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata Library Version: 1.02.107-RHEL7 (2016-06-09) Logging Driver: json-file Cgroup Driver: cgroupfs Plugins: Volume: local Network: bridge host null overlay Swarm: inactive Runtimes: runc Default Runtime: runc Security Options: seccomp Kernel Version: 3.10.0-327.36.3.el7.x86_64 Operating System: CentOS Linux 7 (Core) OSType: linux Architecture: x86_64 CPUs: 1 Total Memory: 3.695 GiB Name: localhost.localdomain ID: FTSO:BZS4:7A7J:RGKW:YAMP:I22I:M4UJ:535T:3IDC:FQU4:G4OY:6ZQC Docker Root Dir: /var/lib/docker Debug Mode (client): false Debug Mode (server): false Registry: https://index.docker.io/v1/ Insecure Registries: 127.0.0.0/8
#Dockerクライアント、サーバー、APIバージョンの確認 [root@localhost ~]# docker version Client: Version: 1.12.3 API version: 1.24 Go version: go1.6.3 Git commit: 6b644ec Built: OS/Arch: linux/amd64 Server: Version: 1.12.3 API version: 1.24 Go version: go1.6.3 Git commit: 6b644ec Built: OS/Arch: linux/amd64
#Dockerイメージ入手 [root@localhost ~]# docker pull centos:centos7.1.1503 centos7.1.1503: Pulling from library/centos 77fe1992330f: Already exists Digest: sha256:cb462399353506bfdfa311ed08274e9d3f595ada38ace7309aec2bc86b2885b5 Status: Downloaded newer image for centos:centos7.1.1503
#Dockerイメージの確認 [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos centos7.1.1503 285396d0a019 12 weeks ago 212.1 MB
#Dockerコンテナの起動 #--name:コンテナ名設定、-h:ホスト名設定-i:標準入力(STDIN)を受付ける、-t:仮想端末(pseudo-TTY)をコンテナに割り当てる [root@localhost ~]# docker run --name test01 -h test01 -i -t centos:centos7.1.1503 /bin/bash [root@test01 /]#
#Dockerコンテナ一覧確認 [root@localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES e8ffc3e52332 centos:centos7.1.1503 "/bin/bash" 25 minutes ago Exited (127) 22 minutes ago test01
#Dockerコンテナのコミット [root@localhost ~]# docker commit e8ffc3e52332 centos:testcon01 sha256:46c2fc5590d011d562ddad66bb0d652ac8af371ffda0064c6ba85406308e3fe7 #Dockerイメージの確認 [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos testcon01 46c2fc5590d0 About a minute ago 212.1 MB centos centos7.1.1503 285396d0a019 12 weeks ago 212.1 MB
#Dockerコンテナのバックグラウンド起動 #--name:コンテナ名設定、-h:ホスト名設定-i:標準入力(STDIN)を受付ける、-t:仮想端末(pseudo-TTY)をコンテナに割り当てる [root@localhost ~]# docker run -d --name test02 -h test02 -i -t centos:centos7.1.1503 /bin/bash 13675cc930cd730767304cf082454832f39dd03e3d229d2f4db511e22f5e126d #Dockerコンテナ一覧確認 [root@localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 13675cc930cd centos:centos7.1.1503 "/bin/bash" About a minute ago Up About a minute test02 ab80b16565e6 centos:centos7.1.1503 "/bin/bash" 34 minutes ago Exited (0) 34 minutes ago test01
#バックグラウンド稼働中のDockerコンテナへの接続 [root@localhost ~]# docker attach 13675cc930cd [root@test02 /]#
#Dockerコンテナを停止せずに抜ける #[Ctrl]+[P] → [Ctrl]+[Q]のキーボードを入力 [root@test02 /]# [root@localhost ~]# #Dockerコンテナ一覧確認 [root@localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 13675cc930cd centos:centos7.1.1503 "/bin/bash" 21 minutes ago Up 21 minutes test02 ab80b16565e6 centos:centos7.1.1503 "/bin/bash" 55 minutes ago Exited (0) 54 minutes ago test01
#Dockerコンテナの終了 [root@test01 /]# exit exit
#停止しているDockerコンテナの起動 [root@localhost ~]# docker start ab80b16565e6 ab80b16565e6
#起動しているDockerコンテナの停止 [root@localhost ~]# docker stop ab80b16565e6 ab80b16565e6
#Dockerコンテナの削除 [root@localhost ~]# docker rm ab80b16565e6 ab80b16565e6
#稼働中のDockerコンテナの強制削除 [root@localhost ~]# docker rm -f 13675cc930cd 13675cc930cd
#Dockerイメージの削除 [root@localhost ~]# docker rmi centos:testcon01 Untagged: centos:testcon01 Deleted: sha256:46c2fc5590d011d562ddad66bb0d652ac8af371ffda0064c6ba85406308e3fe7 Deleted: sha256:7f409f5fd222fa5b0e0beb2c2754f92d54137d37af02da804d48497ee8b5eb09
#Dockerイメージの強制削除 [root@localhost ~]# docker rmi -f centos:cent7.1.1503 Untagged: centos:cent7.1.1503 Deleted: sha256:b81c5494b34e8f608225e8d91e22ccfd48bb46d43a3668543e5244fbc05f2eb3 Deleted: sha256:786ac458fb47ae6a80e5602fa67920fc67bf98df79713222a018abd67cff5c32
利用環境
CentOS 7.2.1511
Docker 1.12.3