概要
http://dotinstall.com/lessons/basic_docker
のまとめ。このメモ見るなら本家見たほうがよいです
Dockerとは
・軽量な仮想化環境を作るツール
・Ubuntuにて開発されている
root@ubuntu:/home/shimizu# wget -qO- https://get.docker.com/ | sh ... The following NEW packages will be installed: crda iw libnl-3-200 libnl-genl-3-200 linux-image-3.13.0-55-generic linux-image-extra-3.13.0-55-generic linux-image-extra-3.16.0-40-generic linux-image-extra-virtual linux-image-generic wireless-regdb 0 upgraded, 10 newly installed, 0 to remove and 32 not upgraded. Need to get 89.5 MB of archives. ... root@ubuntu:/home/shimizu# docker -v Docker version 1.7.0, build 0baf609
イメージ
Docker Index:Imageの共有サイト
Imageをダウンロード(docker pull)して、Containerとして実行する(docker run)
Containerを別のDockerサーバに移動させるには、ContainerをImageに変換(docker commit)して
Docker Indexに登録する(docker push)
操作方法
### Imageのダウンロード ###
root@ubuntu:/home/shimizu# docker search centos
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
centos The official build of CentOS. 1092 [OK]
tutum/centos Centos image with SSH access. For the root... 13 [OK]
blalor/centos Bare-bones base CentOS 6.5 image 9 [OK]
torusware/speedus-centos Always updated official CentOS docker imag... 6 [OK]
million12/centos-supervisor Base CentOS-7 with supervisord launcher, h... 5 [OK]
jdeathe/centos-ssh CentOS-6 6.6 x86_64 / EPEL Repo. / OpenSSH... 3 [OK]
layerworx/centos A general CentOS 6 image with the EPEL6 an... 2 [OK]
jdeathe/centos-ssh-mysql CentOS-6 6.6 x86_64 / MySQL. 2 [OK]
pdericson/centos Docker image for CentOS 0 [OK]
nathonfowlie/centos-jre Latest CentOS image with the JRE pre-insta... 0 [OK]
root@ubuntu:/home/shimizu# docker pull centos
latest: Pulling from centos
f1b10cd84249: Pull complete
c852f6d61e65: Pull complete
7322fbe74aa5: Already exists
centos:latest: The image you are pulling has been verified. Important: image verification is a tech preview feature and should not be relied on to provide security.
Digest: sha256:a4627c43bafc86705af2e8a5ea1f0ed34fbf27b6e7a392e5ee45dbd4736627cc
Status: Downloaded newer image for centos:latest
root@ubuntu:/home/shimizu# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
centos latest 7322fbe74aa5 13 days ago 172.2 MB
# 詳細を表示する。IDについては一意であれば何文字でもOK
root@ubuntu:/home/shimizu# docker inspect 73
...
### Containerを作成する ###
root@ubuntu:/home/shimizu# docker run 73 echo "hello world"
hello world
# 実行が完了したプロセスを表示する
root@ubuntu:/home/shimizu# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6d654c9581e3 73 "echo 'hello world'" About a minute ago Exited (0) About a minute ago sharp_kirch
root@ubuntu:/home/shimizu# docker run -d centos free -s 3
29c3e9f265781ab94817e1c8ca2f54bf26d243ad702db0acd1f2631c4332a283
# 実行中のプロセスを表示する
root@ubuntu:/home/shimizu# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
29c3e9f26578 centos "free -s 3" 2 seconds ago Up 1 seconds hungry_jones
root@ubuntu:/home/shimizu# docker logs 29c3e9f26578
total used free shared buff/cache available
Mem: 686628 84136 107884 452 494608 474308
Swap: 0 0 0
total used free shared buff/cache available
Mem: 686628 81572 110440 460 494616 476900
Swap: 0 0 0
total used free shared buff/cache available
Mem: 686628 81572 110440 460 494616 476900
Swap: 0 0 0
total used free shared buff/cache available
Mem: 686628 81560 110440 460 494628 476900
Swap: 0 0 0
total used free shared buff/cache available
Mem: 686628 81560 110440 460 494628 476912
Swap: 0 0 0
root@ubuntu:/home/shimizu# docker kill 29c3e9f26578
29c3e9f26578
root@ubuntu:/home/shimizu# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
### ContainerからImageを作成して、正しく動作するか確認する ###
root@ubuntu:/home/shimizu# docker run -i -t centos /bin/bash
[root@ff4b98c69eb6 /]# touch hello.txt
[root@ff4b98c69eb6 /]# ls
bin dev etc hello.txt home lib lib64 lost+found media mnt opt proc root run sbin srv sys tmp usr var
[root@ff4b98c69eb6 /]# exit
root@ubuntu:/home/shimizu# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ff4b98c69eb6 centos "/bin/bash" 25 seconds ago Exited (0) 9 seconds ago hopeful_pike
root@ubuntu:/home/shimizu# docker commit ff4 test/hello
8fac9b012f2d1983a9bd10ad5f1e48ab270b9603963dff46dd22be777ccdb04f
root@ubuntu:/home/shimizu# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
test/hello latest 8fac9b012f2d 9 seconds ago 172.2 MB
centos latest 7322fbe74aa5 13 days ago 172.2 MB
root@ubuntu:/home/shimizu# docker run -i -t test/hello /bin/bash
[root@33f4291501ed /]# ls
bin dev etc hello.txt home lib lib64 lost+found media mnt opt proc root run sbin srv sys tmp usr var