Docker 入門(1)
Docker入門 Immutable Infrastructureを実現する
- 作者: 松原豊,米林正明
- 出版社/メーカー: 技術評論社
- 発売日: 2014/04/25
- メディア: Kindle版
- この商品を含むブログ (5件) を見る
写経。
準備
$ brew install docker boot2docker
$ boot2docker init
$ boot2docker up
$ export DOCKER_HOST=tcp://192.168.59.103:2375
$ boot2docker ssh
docker@boot2docker:~$ docker pull ubuntu
docker@boot2docker:~$ docker run ubuntu /bin/echo hello world
基本操作
インタラクティブ実行
docker@boot2docker:~$ docker run -i -t -h ubuntu ubuntu /bin/bash
root@ubuntu:/# exit
バックグランドで実行
docker@boot2docker:~$ docker run -d ubuntu /bin/sh -c "while true; do echo Hello world; sleep 10; done"
cbfbe8f4de110601bd884fb7fa3e1c252d4abcc4b29e2f996b2c642c0cc1b567
docker@boot2docker:~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
cbfbe8f4de11 ubuntu:14.04 /bin/sh -c 'while tr 41 seconds ago Up 40 seconds silly_turing
docker@boot2docker:~$ docker logs -f cbfbe8f4de110601bd884fb7fa3e1c252d4abcc4b29e2f996b2c642c0cc1b567
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
コンテナの停止
docker@boot2docker:~$ docker stop cbfbe8f4de110601bd884fb7fa3e1c252d4abcc4b29e2f996b2c642c0cc1b567
cbfbe8f4de110601bd884fb7fa3e1c252d4abcc4b29e2f996b2c642c0cc1b567
docker@boot2docker:~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
コンテナの再実行
docker@boot2docker:~$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
cbfbe8f4de11 ubuntu:14.04 /bin/sh -c 'while tr 4 minutes ago Exited (-1) About a minute ago silly_turing
198ac0c5f14f ubuntu:14.04 /bin/bash 3 hours ago Exited (0) 3 hours ago desperate_darwin
0aa4a140fb2c ubuntu:14.04 /bin/echo hello worl 3 hours ago Exited (0) 3 hours ago romantic_jones
docker@boot2docker:~$ docker restart cbfbe8f4de11
cbfbe8f4de11
docker@boot2docker:~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
cbfbe8f4de11 ubuntu:14.04 /bin/sh -c 'while tr 4 minutes ago Up 26 seconds silly_turing
コンテナへのアタッチ
docker@boot2docker:~$ docker attach cbfbe8f4de11
Hello world
Hello world
Hello world
Hello world
^C
docker@boot2docker:~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
コンテナの強制終了
※ stop ではタイムアウトするまでコンテナの終了を待つが、kill は即時にコンテナを終了させる。
docker@boot2docker:~$ docker restart cbfbe8f4de11
cbfbe8f4de11
docker@boot2docker:~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
cbfbe8f4de11 ubuntu:14.04 /bin/sh -c 'while tr 7 minutes ago Up 4 seconds silly_turing
docker@boot2docker:~$ docker kill cbfbe8f4de11
cbfbe8f4de11
docker@boot2docker:~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
コンテナ内プロセスの監視
docker@boot2docker:~$ docker restart cbfbe8f4de11
cbfbe8f4de11
docker@boot2docker:~$ docker top cbfbe8f4de11
PID USER COMMAND
998 root /bin/sh -c while true; do echo Hello world; sleep 10; done
1018 root sleep 10
コンテナの状態の確認
docker@boot2docker:~$ docker inspect cbfbe8f4de11
[{
"Args": [
"-c",
"while true; do echo Hello world; sleep 10; done"
],
"Config": {
"AttachStderr": false,
"AttachStdin": false,
"AttachStdout": false,
"Cmd": [
"/bin/sh",
"-c",
"while true; do echo Hello world; sleep 10; done"
],
"CpuShares": 0,
"Cpuset": "",
"Domainname": "",
"Entrypoint": null,
"Env": [
"HOME=/",
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"ExposedPorts": null,
"Hostname": "cbfbe8f4de11",
"Image": "ubuntu",
"Memory": 0,
"MemorySwap": 0,
"NetworkDisabled": false,
"OnBuild": null,
"OpenStdin": false,
"PortSpecs": null,
"StdinOnce": false,
"Tty": false,
"User": "",
"Volumes": null,
"WorkingDir": ""
},
"Created": "2014-08-18T09:43:46.165018471Z",
"Driver": "aufs",
"ExecDriver": "native-0.2",
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"Dns": null,
"DnsSearch": null,
"Links": null,
"LxcConf": [],
"NetworkMode": "bridge",
"PortBindings": {},
"Privileged": false,
"PublishAllPorts": false,
"VolumesFrom": null
},
"HostnamePath": "/mnt/sda1/var/lib/docker/containers/cbfbe8f4de110601bd884fb7fa3e1c252d4abcc4b29e2f996b2c642c0cc1b567/hostname",
"HostsPath": "/mnt/sda1/var/lib/docker/containers/cbfbe8f4de110601bd884fb7fa3e1c252d4abcc4b29e2f996b2c642c0cc1b567/hosts",
"Id": "cbfbe8f4de110601bd884fb7fa3e1c252d4abcc4b29e2f996b2c642c0cc1b567",
"Image": "c4ff7513909dedf4ddf3a450aea68cd817c42e698ebccf54755973576525c416",
"MountLabel": "",
"Name": "/silly_turing",
"NetworkSettings": {
"Bridge": "docker0",
"Gateway": "172.17.42.1",
"IPAddress": "172.17.0.5",
"IPPrefixLen": 16,
"PortMapping": null,
"Ports": {}
},
"Path": "/bin/sh",
"ProcessLabel": "",
"ResolvConfPath": "/mnt/sda1/var/lib/docker/containers/cbfbe8f4de110601bd884fb7fa3e1c252d4abcc4b29e2f996b2c642c0cc1b567/resolv.conf",
"State": {
"ExitCode": 0,
"FinishedAt": "2014-08-18T09:50:53.222406799Z",
"Paused": false,
"Pid": 998,
"Running": true,
"StartedAt": "2014-08-18T09:52:09.613630607Z"
},
"Volumes": {},
"VolumesRW": {}
}
]
docker@boot2docker:~$ docker inspect -f "{{.State}}" cbfbe8f4de11
map[ExitCode:0 FinishedAt:2014-08-18T09:50:53.222406799Z Paused:false Pid:998 Running:true StartedAt:2014-08-18T09:52:09.613630607Z]
コンテナのコミット
docker@boot2docker:~$ docker commit cbfbe8f4de11
d7a471af5180a8185859e0684058b73cbd004e53cfb858b5859e5c5d0e731246
docker@boot2docker:~$ docker images | grep d7a471af5180
<none> <none> d7a471af5180 54 seconds ago 225.4 MB
コンテナの削除、イメージの削除
docker@boot2docker:~$ docker rm cbfbe8f4de11
Error response from daemon: Impossible to remove a running container, please stop it first or use -f
2014/08/18 09:57:16 Error: failed to remove one or more containers
docker@boot2docker:~$ docker kill cbfbe8f4de11
cbfbe8f4de11
docker@boot2docker:~$ docker rm cbfbe8f4de11
cbfbe8f4de11
docker@boot2docker:~$ docker rmi d7a471af5180
Deleted: d7a471af5180a8185859e0684058b73cbd004e53cfb858b5859e5c5d0e731246
コンテナのイメージを共有する
Usage: docker push NAME[:TAG]
Dockerfile
$ docker build .
- FROM
- RUN
- CMD
- EXPOSE
- ENV
- ADD
- ENTRYPOINT
- VOLUME
- USER
- WORKDIR
- ONBUILD
