docker 간단 명령어 정리(centOS 7)
- 도커 이미지 실행
# docker 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.
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://cloud.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/engine/userguide/
# docker run -it centos bash
[root@8f65e72cb233 /]#
[root@8f65e72cb233 /]# ls
-> centos 쉘(bash) 을 실행시켜서 파일 목록이나 디렉토리 구조를 확인할 수 있다. centos 이미지가 없을 경우에는 자동으로 docker hub 에서 download 한다.(pull)
- 도커 이미지들 확인
# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/ubuntu latest ccc7a11d65b1 3 weeks ago 120.1 MB
docker.io/hello-world latest 1815c82652c0 11 weeks ago 1.84 kB
-> 다운받은 도커 이미지 파일들은 /var/lib/docker/image/ 에 존재한다. (CentOS 인 경우)
아래 화면에서 보면 image/devicemapper 디렉토리에 distribution, imagedb, layerdb, repositories 이다.
# pwd
/var/lib/docker/image/devicemapper
# ls -la
합계 4
drwx------. 5 root root 77 9월 6 18:14 .
drwx------. 3 root root 25 9월 5 17:25 ..
drwx------. 4 root root 56 9월 5 17:26 distribution
drwx------. 4 root root 35 9월 5 17:25 imagedb
drwx------. 5 root root 42 9월 5 17:26 layerdb
-rw-------. 1 root root 891 9월 6 18:14 repositories.json
# ls
distribution imagedb layerdb repositories.json
# more repositories.json | python -mjson.tool
{
"Repositories": {
"docker.io/centos": {
"docker.io/centos:latest": "sha256:328edcd84f1bbf868bc88e4ae37afe421ef19be71890f59b4b2d8ba48414b84d",
"docker.io/centos@sha256:26f74cefad82967f97f3eeeef88c1b6262f9b42bc96f2ad61d6f3fdf544759b8": "sha256:328edcd84f1bbf868bc88e4ae37afe421ef19be71890f59b4b2d8ba48414b84d"
},
"docker.io/hello-world": {
"docker.io/hello-world:latest": "sha256:1815c82652c03bfd8644afda26fb184f2ed891d921b20a0703b46768f9755c57",
"docker.io/hello-world@sha256:f3b3b28a45160805bb16542c9531888519430e9e6d6ffc09d72261b0d26ff74f": "sha256:1815c82652c03bfd8644afda26fb184f2ed891d921b20a0703b46768f9755c57"
},
"docker.io/ubuntu": {
"docker.io/ubuntu:latest": "sha256:ccc7a11d65b1b5874b65adb4b2387034582d08d65ac1817ebc5fb9be1baa5f88",
"docker.io/ubuntu@sha256:34471448724419596ca4e890496d375801de21b0e67b81a77fd6155ce001edad": "sha256:ccc7a11d65b1b5874b65adb4b2387034582d08d65ac1817ebc5fb9be1baa5f88"
}
}
}
- 도커 실행 컨테이너 확인
# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@235 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8f65e72cb233 centos "bash" 8 minutes ago Exited (127) 2 minutes ago mad_torvalds
33a6167a4bf4 centos "bash" 8 minutes ago Exited (0) 8 minutes ago adoring_swartz
1fc2f1ecd64a centos "bash" 9 minutes ago Exited (0) 9 minutes ago high_carson
4d30dc88962b centos "bash" 9 minutes ago Exited (0) 9 minutes ago peaceful_heyrovsky
e2cbdcbabf11 ubuntu "bash" 10 minutes ago Exited (0) 10 minutes ago high_darwin
2fee380d8bce ubuntu "bash" 10 minutes ago Exited (0) 10 minutes ago berserk_lovelace
74cbada0927a hello-world "/hello" 12 minutes ago Exited (0) 12 minutes ago backstabbing_poincare
135bae3e7596 hello-world "bash" 12 minutes ago Created hungry_ramanujan
bd6680e5cdd8 hello-world "/usr/bin/bash" 12 minutes ago Created compassionate_murdock
ce192cbf35b2 centos "bash" 3 hours ago Exited (0) 3 hours ago pensive_mcnulty
- 도커 컨테이너 삭제
# docker rm mad_torvalds adoring_swartz high_carson peaceful_heyrovsky high_darwin berserk_lovelace backstabbing_poincare hungry_ramanujan compassionate_murdock pensive_mcnuty
mad_torvalds
adoring_swartz
high_carson
peaceful_heyrovsky
high_darwin
berserk_lovelace
backstabbing_poincare
hungry_ramanujan
compassionate_murdock
pensive_mcnulty
-> docker ps 명령어 에서 NAMES 열에 있던 이름(컨테이너 실행시(docker run) --name 옵션을 안줘서 자동으로 생성된 이름이 보인다.)으로 해당 컨테이너들을 삭제한다. 하나만 입력해도 되고 여러개를 입력해도 된다.
- 도커 이미지 삭제
# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/ubuntu latest ccc7a11d65b1 3 weeks ago 120.1 MB
docker.io/centos latest 328edcd84f1b 4 weeks ago 192.5 MB
docker.io/hello-world latest 1815c82652c0 11 weeks ago 1.84 kB
[root@235 ~]# docker rmi ccc7a11d65b1
Untagged: docker.io/ubuntu:latest
Untagged: docker.io/ubuntu@sha256:34471448724419596ca4e890496d375801de21b0e67b81a77fd6155ce001edad
Deleted: sha256:ccc7a11d65b1b5874b65adb4b2387034582d08d65ac1817ebc5fb9be1baa5f88
Deleted: sha256:cb5450c7bb149c39829e9ae4a83540c701196754746e547d9439d9cc59afe798
Deleted: sha256:364dc483ed8e64e16064dc1ecf3c4a8de82fe7f8ed757978f8b0f9df125d67b3
Deleted: sha256:4f10a8fd56139304ad81be75a6ac056b526236496f8c06b494566010942d8d32
Deleted: sha256:508ceb742ac26b43bdda819674a5f1d33f7b64c1708e123a33e066cb147e2841
Deleted: sha256:8aa4fcad5eeb286fe9696898d988dc85503c6392d1a2bd9023911fb0d6d27081
-> ubuntu 이미지를 지우기 위해 image ID 를 확인후, 해당 id 값으로 삭제한다.
참고한 사이트 :
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