Docker containerの操作

数日前からDockerを勉強している老眼SEです｡
Dockerの仕組みも用語もあやふやの超初心者で多分に間違いもありそうですが､取り敢えず動かしています｡

今回はコンテナの操作です｡

• コンテナの作成と起動

コンテナの作成して起動するにはdocker runコマンドを実行します｡
docker runには多数のオプションがあってよく分かりませんが取り敢えず基本的なところで､コンテナ名をmycentos6で作成して起動､アタッチします｡

$ docker run -it --name mycentos6 centos:6 /bin/bash [root@fb942762e4bf /]#

1 2	$ docker run -it --name mycentos6 centos:6 /bin/bash [root@fb942762e4bf /]#

• コンテナ一覧

作成されたコンテナの一覧表示です｡

Shell

$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES fb942762e4bf centos:6 "/bin/bash" 41 minutes ago Up 41 minutes mycentos6 4efef60d9ed0 centos:6 "/bin/bash" About an hour ago Up About an hour infallible_cray

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$ docker ps CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES fb942762e4bf        centos:6            "/bin/bash"         41 minutes ago      Up 41 minutes                           mycentos6 4efef60d9ed0        centos:6            "/bin/bash"         About an hour ago   Up About an hour                        infallible_cray

Shell

$ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES a39c09a29c8c centos:6 "/bin/bash" 2 minutes ago Exited (0) 2 minutes ago mycentos-2 fb942762e4bf centos:6 "/bin/bash" 40 minutes ago Up 40 minutes mycentos6 4efef60d9ed0 centos:6 "/bin/bash" About an hour ago Up About an hour infallible_cray 119a3a22a319 centos "/bin/bash" 6 hours ago Exited (0) 6 hours ago compassionate_morse 1d65fc64000f centos:6 "/bin/bash" 6 hours ago Exited (0) 6 hours ago objective_stonebraker 05a6e1c7a4f6 hello-world "/hello" 7 hours ago Exited (0) 7 hours ago loving_beaver

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$ docker ps -a CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                     PORTS               NAMES a39c09a29c8c        centos:6            "/bin/bash"         2 minutes ago       Exited (0) 2 minutes ago                       mycentos-2 fb942762e4bf        centos:6            "/bin/bash"         40 minutes ago      Up 40 minutes                                  mycentos6 4efef60d9ed0        centos:6            "/bin/bash"         About an hour ago   Up About an hour                               infallible_cray 119a3a22a319        centos              "/bin/bash"         6 hours ago         Exited (0) 6 hours ago                         compassionate_morse 1d65fc64000f        centos:6            "/bin/bash"         6 hours ago         Exited (0) 6 hours ago                         objective_stonebraker 05a6e1c7a4f6        hello-world         "/hello"            7 hours ago         Exited (0) 7 hours ago                         loving_beaver

• コンテナのデタッチ

デタッチはCtrl+p Ctrl+q

• コンテナへのアタッチ
Shell

$ docker attach mycentos6 [root@fb942762e4bf /]#

1 2	$ docker attach mycentos6 [root@fb942762e4bf /]#

• コンテナの起動
Shell

$ docker start 119a3a22a319 119a3a22a319 $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES fb942762e4bf centos:6 "/bin/bash" 58 minutes ago Up 58 minutes mycentos6 4efef60d9ed0 centos:6 "/bin/bash" About an hour ago Up About an hour infallible_cray 119a3a22a319 centos "/bin/bash" 6 hours ago Up 5 seconds compassionate_morse

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$ docker start 119a3a22a319 119a3a22a319   $ docker ps CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES fb942762e4bf        centos:6            "/bin/bash"         58 minutes ago      Up 58 minutes                           mycentos6 4efef60d9ed0        centos:6            "/bin/bash"         About an hour ago   Up About an hour                        infallible_cray 119a3a22a319        centos              "/bin/bash"         6 hours ago         Up 5 seconds                            compassionate_morse

• コンテナの停止
Shell

$ docker stop 119a3a22a319 119a3a22a319 $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES fb942762e4bf centos:6 "/bin/bash" About an hour ago Up About an hour mycentos6 4efef60d9ed0 centos:6 "/bin/bash" About an hour ago Up About an hour infallible_cray

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$ docker stop 119a3a22a319 119a3a22a319   $ docker ps CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES fb942762e4bf        centos:6            "/bin/bash"         About an hour ago   Up About an hour                        mycentos6 4efef60d9ed0        centos:6            "/bin/bash"         About an hour ago   Up About an hour                        infallible_cray

• コンテナの再起動
Shell

$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES fb942762e4bf centos:6 "/bin/bash" About an hour ago Up About an hour mycentos6 4efef60d9ed0 centos:6 "/bin/bash" About an hour ago Up About an hour infallible_cray $ docker restart 4efef60d9ed0 4efef60d9ed0 $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES fb942762e4bf centos:6 "/bin/bash" About an hour ago Up About an hour mycentos6 4efef60d9ed0 centos:6 "/bin/bash" About an hour ago Up 5 seconds infallible_cray

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$ docker ps CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES fb942762e4bf        centos:6            "/bin/bash"         About an hour ago   Up About an hour                        mycentos6 4efef60d9ed0        centos:6            "/bin/bash"         About an hour ago   Up About an hour                        infallible_cray   $ docker restart 4efef60d9ed0 4efef60d9ed0   $ docker ps CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES fb942762e4bf        centos:6            "/bin/bash"         About an hour ago   Up About an hour                        mycentos6 4efef60d9ed0        centos:6            "/bin/bash"         About an hour ago   Up 5 seconds                            infallible_cray

• コンテナの使用リソース
Shell

$ docker stats --no-stream CONTAINER CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS fb942762e4bf 0.00% 352 KiB / 3.844 GiB 0.01% 2.12 kB / 648 B 0 B / 0 B 1 4efef60d9ed0 0.00% 356 KiB / 3.844 GiB 0.01% 648 B / 648 B 0 B / 0 B 1

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$ docker stats --no-stream CONTAINER           CPU %               MEM USAGE / LIMIT     MEM %               NET I/O             BLOCK I/O           PIDS fb942762e4bf        0.00%               352 KiB / 3.844 GiB   0.01%               2.12 kB / 648 B     0 B / 0 B           1 4efef60d9ed0        0.00%               356 KiB / 3.844 GiB   0.01%               648 B / 648 B       0 B / 0 B           1

• コンテナ名の変更
Shell

$ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES fb942762e4bf centos:6 "/bin/bash" About an hour ago Up About an hour mycentos6 4efef60d9ed0 centos:6 "/bin/bash" About an hour ago Up 9 minutes infallible_cray 119a3a22a319 centos "/bin/bash" 6 hours ago Exited (137) 11 minutes ago compassionate_morse 1d65fc64000f centos:6 "/bin/bash" 6 hours ago Exited (0) 6 hours ago objective_stonebraker $ docker rename 119a3a22a319 mycentos7 $ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES fb942762e4bf centos:6 "/bin/bash" About an hour ago Up About an hour mycentos6 4efef60d9ed0 centos:6 "/bin/bash" About an hour ago Up 10 minutes infallible_cray 119a3a22a319 centos "/bin/bash" 6 hours ago Exited (137) 12 minutes ago mycentos7 1d65fc64000f centos:6 "/bin/bash" 6 hours ago Exited (0) 6 hours ago objective_stonebraker

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$ docker ps -a CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                        PORTS               NAMES fb942762e4bf        centos:6            "/bin/bash"         About an hour ago   Up About an hour                                  mycentos6 4efef60d9ed0        centos:6            "/bin/bash"         About an hour ago   Up 9 minutes                                      infallible_cray 119a3a22a319        centos              "/bin/bash"         6 hours ago         Exited (137) 11 minutes ago                       compassionate_morse 1d65fc64000f        centos:6            "/bin/bash"         6 hours ago         Exited (0) 6 hours ago                            objective_stonebraker   $ docker rename 119a3a22a319 mycentos7   $ docker ps -a CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                        PORTS               NAMES fb942762e4bf        centos:6            "/bin/bash"         About an hour ago   Up About an hour                                  mycentos6 4efef60d9ed0        centos:6            "/bin/bash"         About an hour ago   Up 10 minutes                                     infallible_cray 119a3a22a319        centos              "/bin/bash"         6 hours ago         Exited (137) 12 minutes ago                       mycentos7 1d65fc64000f        centos:6            "/bin/bash"         6 hours ago         Exited (0) 6 hours ago                            objective_stonebraker

• コンテナの削除
Shell

$ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES fb942762e4bf centos:6 "/bin/bash" About an hour ago Up About an hour mycentos6 4efef60d9ed0 centos:6 "/bin/bash" About an hour ago Up About a minute infallible_cray 119a3a22a319 centos "/bin/bash" 6 hours ago Exited (137) 3 minutes ago compassionate_morse 1d65fc64000f centos:6 "/bin/bash" 6 hours ago Exited (0) 6 hours ago objective_stonebraker 05a6e1c7a4f6 hello-world "/hello" 7 hours ago Exited (0) 7 hours ago loving_beaver $ docker rm 05a6e1c7a4f6 05a6e1c7a4f6 $ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES fb942762e4bf centos:6 "/bin/bash" About an hour ago Up About an hour mycentos6 4efef60d9ed0 centos:6 "/bin/bash" About an hour ago Up About a minute infallible_cray 119a3a22a319 centos "/bin/bash" 6 hours ago Exited (137) 3 minutes ago compassionate_morse 1d65fc64000f centos:6 "/bin/bash" 6 hours ago Exited (0) 6 hours ago objective_stonebraker

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$ docker ps -a CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                       PORTS               NAMES fb942762e4bf        centos:6            "/bin/bash"         About an hour ago   Up About an hour                                 mycentos6 4efef60d9ed0        centos:6            "/bin/bash"         About an hour ago   Up About a minute                                infallible_cray 119a3a22a319        centos              "/bin/bash"         6 hours ago         Exited (137) 3 minutes ago                       compassionate_morse 1d65fc64000f        centos:6            "/bin/bash"         6 hours ago         Exited (0) 6 hours ago                           objective_stonebraker 05a6e1c7a4f6        hello-world         "/hello"            7 hours ago         Exited (0) 7 hours ago                           loving_beaver   $ docker rm 05a6e1c7a4f6 05a6e1c7a4f6   $ docker ps -a CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                       PORTS               NAMES fb942762e4bf        centos:6            "/bin/bash"         About an hour ago   Up About an hour                                 mycentos6 4efef60d9ed0        centos:6            "/bin/bash"         About an hour ago   Up About a minute                                infallible_cray 119a3a22a319        centos              "/bin/bash"         6 hours ago         Exited (137) 3 minutes ago                       compassionate_morse 1d65fc64000f        centos:6            "/bin/bash"         6 hours ago         Exited (0) 6 hours ago                           objective_stonebraker