Linux でのインストール # yum install docker # systemctl start docker # systemctl enable docker
以下はWindows上を想定 Dockerのサービス状態を確認する。
PS C:\Users\docker> docker info Containers: 0 Running: 0 Paused: 0 Stopped: 0 Images: 0 Server Version: 18.09.2 ～（後略）～
Docker イメージの検索
> docker search httpd NAME DESCRIPTION STARS OFFICIAL AUTOMATED httpd The Apache HTTP Server Project 2552 [OK] centos/httpd 23 [OK] centos/httpd-24-centos7 Platform for running Apache httpd 2.4 or bui… 22
イメージの入手
> docker pull httpd Using default tag: latest latest: Pulling from library/httpd f5d23c7fed46: Pull complete b083c5fd185b: Pull complete bf5100a89e78: Pull complete 98f47fcaa52f: Pull complete 622a9dd8cfed: Pull complete Digest: sha256:8bd76c050761610773b484e411612a31f299dbf7273763103edbda82acd73642 Status: Downloaded newer image for httpd:latest
イメージの一覧を表示する
> docker images REPOSITORY TAG IMAGE ID CREATED SIZE httpd latest ee39f68eb241 4 days ago 154MB
コンテナを生成して起動
> docker run -d -p 8080:80 httpd（-d: デタッチド=バックグラウンドで実行 --name=: コンテナに名前を付ける -p 自ホストの8080をコンテナのポート80と繋ぐ） > docker run -d --name=httpd -p 80:80 httpd 29f740bde604b7716865b96c94ef166f0835b3598e70088804fa77b5a8648599 PS C:\Users\admin\docker-amp> docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 29f740bde604 httpd "httpd-foreground" 6 seconds ago Up 4 seconds 0.0.0.0:8080->80/tcp httpd
コンテナの一覧を表示する
> docker ps -a（-a : 停止中のコンテナも表示する） CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 35651e0dbea0 httpd "httpd-foreground" 8 minutes ago Up 8 minutes 0.0.0.0:8080->80/tcp httpd
コンテナの停止
> docker stop 356 356
コンテナの削除
> docker rm 356 356
ローカルディレクトリとマウントしたコンテナを生成
コンテナの起動
> docker start 7dd 7dd
> docker rmi ee39 Untagged: httpd:latest Untagged: httpd@sha256:8bd76c050761610773b484e411612a31f299dbf7273763103edbda82acd73642 Deleted: sha256:ee39f68eb241fd811887da7e21425ac657074363daa9969b9519504785f5d60d Deleted: sha256:58196fbec21e78d5358fbc70beb15f0c88876cd90b69e7b1ddaf4704555dd740 Deleted: sha256:8f7378bcc6ba3317d1366fa79733e4a8b703d7cde181f671229a6619116477a8 Deleted: sha256:43c1dcceb2782c203ab2b2a5229f4938a2a05fbc70b8508f3de668434422c264 Deleted: sha256:912caf7e400db91ab190309fdf9baa15cf42574a3eefe1e1a4c6ab4a963742ff Deleted: sha256:d8a33133e477d367977987129313d9072e0ec80894ed4c52c2d88186f354c29a
起動中のコンテナでコマンドを実行する
> docker exec -it 40b bash （-i：インタラクティブモード。-t : 仮想端末の割り当て） root@40b604da6f3d:/usr/local/apache2# root@40b604da6f3d:/usr/local/apache2# cat /etc/debian_version 10.0 root@40b604da6f3d:/usr/local/apache2# cat /etc/issue Debian GNU/Linux 10 \n \l
> docker stop f46 f46
> docker rm f46 f46
> docker run -d --name apache -p 8081:80 httpd 95df079be5569ebd9cdcd9b9c10500081d1d709a7ef7ca04779d35aba8ef7cdc
> docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 95df079be556 httpd "httpd-foreground" 9 seconds ago Up 7 seconds 0.0.0.0:8081->80/tcp apache
> docker stop apache apache
> docker rm apache apache
> docker run -d --name apache -p 8081:80 -v "$(pwd):/usr/local/apache2/htdocs/" httpd 608f62e1a99f177d48945e0ba25179423c99b7faae50d9894ab10b8b94825d4e
> docker help
Usage: docker [OPTIONS] COMMAND
A self-sufficient runtime for containers
Options:
--config string Location of client config files (default
"C:\\Users\\admin\\.docker")
-D, --debug Enable debug mode
-H, --host list Daemon socket(s) to connect to
-l, --log-level string Set the logging level
("debug"|"info"|"warn"|"error"|"fatal")
(default "info")
--tls Use TLS; implied by --tlsverify
--tlscacert string Trust certs signed only by this CA (default
"C:\\Users\\admin\\.docker\\ca.pem")
--tlscert string Path to TLS certificate file (default
"C:\\Users\\admin\\.docker\\cert.pem")
--tlskey string Path to TLS key file (default
"C:\\Users\\admin\\.docker\\key.pem")
--tlsverify Use TLS and verify the remote
-v, --version Print version information and quit
Management Commands:
builder Manage builds
config Manage Docker configs
container Manage containers
image Manage images
network Manage networks
node Manage Swarm nodes
plugin Manage plugins
secret Manage Docker secrets
service Manage services
stack Manage Docker stacks
swarm Manage Swarm
system Manage Docker
trust Manage trust on Docker images
volume Manage volumes
Commands:
attach Attach local standard input, output, and error streams to a running container
build Build an image from a Dockerfile
commit Create a new image from a container's changes
cp Copy files/folders between a container and the local filesystem
create Create a new container
diff Inspect changes to files or directories on a container's filesystem
events Get real time events from the server
exec Run a command in a running container
export Export a container's filesystem as a tar archive
history Show the history of an image
images List images
import Import the contents from a tarball to create a filesystem image
info Display system-wide information
inspect Return low-level information on Docker objects
kill Kill one or more running containers
load Load an image from a tar archive or STDIN
login Log in to a Docker registry
logout Log out from a Docker registry
logs Fetch the logs of a container
pause Pause all processes within one or more containers
port List port mappings or a specific mapping for the container
ps List containers
pull Pull an image or a repository from a registry
push Push an image or a repository to a registry
rename Rename a container
restart Restart one or more containers
rm Remove one or more containers
rmi Remove one or more images
run Run a command in a new container
save Save one or more images to a tar archive (streamed to STDOUT by default)
search Search the Docker Hub for images
start Start one or more stopped containers
stats Display a live stream of container(s) resource usage statistics
stop Stop one or more running containers
tag Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
top Display the running processes of a container
unpause Unpause all processes within one or more containers
update Update configuration of one or more containers
version Show the Docker version information
wait Block until one or more containers stop, then print their exit codes
Run 'docker COMMAND --help' for more information on a command.
PS C:\Users\admin> docker top
"docker top" requires at least 1 argument.
See 'docker top --help'.
Usage: docker top CONTAINER [ps OPTIONS]
Display the running processes of a container
