[실습] Dockerfile

1. Dockerfile 실습

 

# ubuntu 이미지 다운로드
docker pull ubuntu:20.04
docker images

# 실습을 위한 디렉터리 생성 및 이동
mkdir -p /root/myweb && cd /root/myweb

 

# Dockerfile 파일 생성
vi Dockerfile

FROM ubuntu:20.04
ENV TZ=Asia/Seoul VERSION=1.0.0 NICK=younggi
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone && \\
    sed -i 's/archive.ubuntu.com/mirror.kakao.com/g' /etc/apt/sources.list && \\
    sed -i 's/security.ubuntu.com/mirror.kakao.com/g' /etc/apt/sources.list && \\
    apt-get update && apt-get install -y apache2 figlet && \\
    echo "$NICK Web Server $VERSION<br>" > /var/www/html/index.html && \\
    echo "<pre>" >> /var/www/html/index.html && \\
    figlet AEWS Study >> /var/www/html/index.html && \\
    echo "</pre>" >> /var/www/html/index.html
EXPOSE 80
CMD ["usr/sbin/apache2ctl", "-DFOREGROUND"]

 

 

 

# 이미지 빌드
ls
cat Dockerfile

 

# 이미지 빌드
docker build -t myweb:v1.0.0 .

 

 

docker images

 

docker image history myweb:v1.0.0

 

docker image inspect myweb:v1.0.0 | jq

(younggi@myeks:default) [root@myeks-bastion myweb]# docker image inspect  myweb:1.0.0 | jq
[
  {
    "Id": "sha256:58a0c2d76425b76086082f336f6faed270d1d26f794f5650364122c6d313301f",
    "RepoTags": [
      "myweb:1.0.0"
    ],
    "RepoDigests": [],
    "Parent": "sha256:af3c36dfd1b8c0abe33b80c4706911092009873ea3babeeea2649b301950cb67",
    "Comment": "",
    "Created": "2024-04-20T06:39:20.835069177Z",
    "Container": "ab68bb1d583231edb3fa6f579419f7c391ffbbb9ed66221ee8e6221811e86406",
    "ContainerConfig": {
      "Hostname": "ab68bb1d5832",
      "Domainname": "",
      "User": "",
      "AttachStdin": false,
      "AttachStdout": false,
      "AttachStderr": false,
      "ExposedPorts": {
        "80/tcp": {}
      },
      "Tty": false,
      "OpenStdin": false,
      "StdinOnce": false,
      "Env": [
        "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
        "TZ=Asia/Seoul",
        "VERSION=1.0.0",
        "NICK=younggi"
      ],
      "Cmd": [
        "/bin/sh",
        "-c",
        "#(nop) ",
        "CMD [\\"usr/sbin/apache2ctl\\" \\"-DFOREGROUND\\"]"
      ],
      "Image": "sha256:af3c36dfd1b8c0abe33b80c4706911092009873ea3babeeea2649b301950cb67",
      "Volumes": null,
      "WorkingDir": "",
      "Entrypoint": null,
      "OnBuild": null,
      "Labels": {
        "org.opencontainers.image.ref.name": "ubuntu",
        "org.opencontainers.image.version": "20.04"
      }
    },
    "DockerVersion": "20.10.25",
    "Author": "",
    "Config": {
      "Hostname": "",
      "Domainname": "",
      "User": "",
      "AttachStdin": false,
      "AttachStdout": false,
      "AttachStderr": false,
      "ExposedPorts": {
        "80/tcp": {}
      },
      "Tty": false,
      "OpenStdin": false,
      "StdinOnce": false,
      "Env": [
        "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
        "TZ=Asia/Seoul",
        "VERSION=1.0.0",
        "NICK=younggi"
      ],
      "Cmd": [
        "usr/sbin/apache2ctl",
        "-DFOREGROUND"
      ],
      "Image": "sha256:af3c36dfd1b8c0abe33b80c4706911092009873ea3babeeea2649b301950cb67",
      "Volumes": null,
      "WorkingDir": "",
      "Entrypoint": null,
      "OnBuild": null,
      "Labels": {
        "org.opencontainers.image.ref.name": "ubuntu",
        "org.opencontainers.image.version": "20.04"
      }
    },
    "Architecture": "amd64",
    "Os": "linux",
    "Size": 237768915,
    "VirtualSize": 237768915,
    "GraphDriver": {
      "Data": {
        "LowerDir": "/var/lib/docker/overlay2/d0169e11c7f108e96788fb3345ef8629832731715d9fe108d5515f0464aab328/diff",
        "MergedDir": "/var/lib/docker/overlay2/4d2ab34d1f267981dba44c42b2fcb01cb3acfcd48317fbc18cadb20bf1b4ee38/merged",
        "UpperDir": "/var/lib/docker/overlay2/4d2ab34d1f267981dba44c42b2fcb01cb3acfcd48317fbc18cadb20bf1b4ee38/diff",
        "WorkDir": "/var/lib/docker/overlay2/4d2ab34d1f267981dba44c42b2fcb01cb3acfcd48317fbc18cadb20bf1b4ee38/work"
      },
      "Name": "overlay2"
    },
    "RootFS": {
      "Type": "layers",
      "Layers": [
        "sha256:106e8431b412f51ccd75ea46a2d5cb4343b23273cbcf50188377cb93aa9a6d82",
        "sha256:504b4f88eacc84b8f31b46dcd0178c7ab91615c8c3f1a0db188b4b2cafd3214b"
      ]
    },
    "Metadata": {
      "LastTagTime": "2024-04-20T15:39:20.865523397+09:00"
    }
  }
]

 

 

# 컨테이너 실행
docker run -d -p 80:80 --rm --name myweb myweb:v1.0.0
docker ps
curl localhost

 

 

# 웹 접속 확인
curl -s ipinfo.io/ip | awk '{ print "myweb = http://"$1"" }'

 

2. Docker Hub(image Repository)에 image 올리기

도커 허브 가입 - https://hub.docker.com/

Docker Hub Container Image Library | App Containerization

 

# 위에서 만든 이미지의 tag명 변경하기
DHUB=dudrl0944
docker tag myweb:1.0.0 $DHUB/myweb:1.0.0
docker images

 

 

# 도커 허브 로그인
docker login
Username: dudrl0944
Password: **********
## 로그인 정보는 /[계정명]/.docker/config.json 에 저장됨. docker logout 시 삭제됨
## cat /root/.docker/config.json | jq

 

## 로그인 정보는 /[계정명]/.docker/config.json 에 저장됨. docker logout 시 삭제됨
cat /root/.docker/config.json | jq

 

 

# push 로 이미지를 저장소에 업로드
docker push $DHUB/myweb:1.0.0

 

 

 

3. DockerHub에 올린 이미지 사용하기

# 기존 로컬의 도커 컨테이너, 이미지 삭제
docker rm -vf $(docker ps -a -q)
docker rmi -f $(docker images -a -q)
docker ps
docker images

 

 

# 도커허브에 올린 이미지 pull & run
docker run -d -p 80:80 --rm --name myweb $DHUB/myweb:1.0.0
docker images

 

 

# 확인
docker ps
curl localhost
curl -s ipinfo.io/ip | awk '{ print "myweb = http://"$1"" }'

 

# 리소스 정리
docker rm -vf $(docker ps -a -q)
docker rmi -f $(docker images -a -q)