dockerでHello Worldしてみる。

■dockerでHello Worldしてみる。
　環境は以下。

　dockerをdebian stretch用からbuster用にアップグレードする。
　https://labunix.hateblo.jp/entry/20200106/1578267032

$ lsb_release -d
Description:	Debian GNU/Linux 10 (buster)

$ docker --version
Docker version 18.09.1, build 4c52b90

■プロキシの設定(サーバ)

$ sudo mkdir -p /etc/systemd/system/docker.service.d
$ sudo systemctl restart docker

$ cat /etc/systemd/system/docker.service.d/http-proxy.conf
[Service]
Environment="HTTP_PROXY=http://192.168.100.200:8080"
Environment="HTTPS_PROXY=http://192.168.100.200:8080"

$ sudo systemctl show --property=Environment docker
Environment=HTTP_PROXY=http://192.168.100.200:8080 HTTPS_PROXY=http://192.168.100.200:8080

$ docker info 2>/dev/null | grep -i proxy
HTTP Proxy: http://192.168.100.200:8080
HTTPS Proxy: http://192.168.100.200:8080

■プロキシの設定(クライアント)

$ cat ~/.docker/config.json 
{
  "proxies": {
    "default": {
      "httpProxy": "http://192.168.100.200:8080",
      "httpsProxy": "http://192.168.100.200:8080"
    }
  }
} 

■基本コマンドの確認

$ echo "image container volume network" | \
  awk '{for(a=1;a<=NF;a++){print "echo \042\134$docker "$a" ls\042;docker",$a,"ls"}}' | sh
$docker image ls
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
$docker container ls
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
$docker volume ls
DRIVER              VOLUME NAME
$docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
4f6ac6047556        bridge              bridge              local
b181ffc1729c        host                host                local
3511d6025db8        none                null                local

■Hello World

$ docker container run hello-world

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

■ログの確認

$ docker container ls -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                      PORTS               NAMES
90ce255d3b90        hello-world         "/hello"            14 minutes ago      Exited (0) 14 minutes ago                       youthful_meitner

$ docker logs 90ce255d3b90

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/