yaml 파일 만들기 실습 (1) - wordpress, db version, service 정의
rapa@rapa:~/0819$ touch docker-compose.yml
rapa@rapa:~/0819$ vi docker-compose.yml- docker-compose.yml
version: "3.0"
services:
wordpress:
image: wordpress
ports:
- "8888:80"
environment:
- WORDPRESS_DB_PASSWORD=test123
- WORDPRESS_DB_NAME=wpdb
- WORDPRESS_DB_USER=root
depends_on:
- db
links:
- db:mysql #mysql은 별칭
db:
image: mysql:5.7
environment:
- MYSQL_ROOT_PASSWORD=test123
- MYSQL_DATABASE=wpdb- docker-compose 실행
rapa@rapa:~/0819$ docker-compose up -d
Creating network "0819_default" with the default driver
Creating 0819_db_1 ... done
Creating 0819_wordpress_1 ... done- 컨테이너 확인
rapa@rapa:~/0819$ docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
749141e8efc0 wordpress "docker-entrypoint.s…" 13 seconds ago Up 10 seconds 0.0.0.0:8888->80/tcp, :::8888->80/tcp 0819_wordpress_1
fd47eb7ec173 mysql:5.7 "docker-entrypoint.s…" 14 seconds ago Up 13 seconds 3306/tcp, 33060/tcp 0819_db_1
52671517fe1d centos:7 "/bin/bash" About an hour ago Up About an hour centos11
0dd8f9536071 hyper/docker-registry-web "start.sh" 3 hours ago Up 2 hours 0.0.0.0:8080->8080/tcp, :::8080->8080/tcp registry-web
dc0b26f3dcde registry "/entrypoint.sh /etc…" 3 hours ago Up 2 hours 0.0.0.0:5000->5000/tcp, :::5000->5000/tcp registryNAMES를 보면 앞에 디렉토리 이름이 붙여져 있음(다른 디렉토리에서 같은 이름 만들어도 구분하기 위해)
번호가 1번이 붙어있는 것 (0819_wordpress 1)은 똑같은 컨테이너를 하나 더 만들수 있다는 뜻.
그치만 포트번호때문에 충돌발생가능
yaml파일 만들기 실습(2) - web, db version, services 정의
- yaml 파일 작성하기
rapa@rapa:~/0822$ touch docker-compose.yml
rapa@rapa:~/0822$ vi docker-compose.yml
rapa@rapa:~/0822$ cat docker-compose.yml
version: '3.7'
services:
web:
image: httpd
ports:
- "8001:80"
command: httpd -D FOREGROUND
depends_on:
- db
links:
- db:mysql
db:
image: mysql:5.7
environment:
- MYSQL_ROOT_PASSWORD=test123
- MYSQL_DATABASE=testdb- 야믈코드 실행 (백그라운드로 -d)
rapa@rapa:~/0822$ docker-compose up -d
Creating network "0822_default" with the default driver
Creating 0822_db_1 ... done
Creating 0822_web_1 ... done별도의 네트워크를 만들지 않아도, 본인디렉토리_default라는 별도의 네트워크가 만들어진다.
별도의 네트워크를 위한 기본네트워크가 생성되고, 컨테이너도 생성된다.
- 정상적으로 생성되었는 지 확인
rapa@rapa:~/0822$ docker-compose ps
Name Command State Ports
-------------------------------------------------------------------------------
0822_db_1 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
0822_web_1 httpd -D FOREGROUND Up 0.0.0.0:8001->80/tcp,:::8001
->80/tcp- web을 2개 만들려했지만 오류 발생 (포트가 겹쳐서)
rapa@rapa:~/0822$ docker-compose scale web=2
WARNING: The scale command is deprecated. Use the up command with the --scale flag instead.
WARNING: The "web" service specifies a port on the host. If multiple containers for this service are created on a single host, the port will clash.
Creating 0822_web_2 ...
Creating 0822_web_2 ... error
ERROR: for 0822_web_2 Cannot start service web: driver failed programming external connectivity on endpoint 0822_web_2 (d70df0ed10fc7f3a808d24e19d073835a3ff3fb0411b131635ab5f1919b8c44b): Bind for 0.0.0.0:8001 failed: port is already allocated
ERROR: Cannot start service web: driver failed programming external connectivity on endpoint 0822_web_2 (d70df0ed10fc7f3a808d24e19d073835a3ff3fb0411b131635ab5f1919b8c44b): Bind for 0.0.0.0:8001 failed: port is already allocated- 이를 해결하기 위해 yaml파일 수정
rapa@rapa:~/0822$ cat docker-compose.yml
version: '3.7'
services:
web:
image: httpd
ports:
- "8001-8002:80"
command: httpd -D FOREGROUND
depends_on:
- db
links:
- db:mysql
db:
image: mysql:5.7
environment:
- MYSQL_ROOT_PASSWORD=test123
- MYSQL_DATABASE=testdb- scale로 2개가 만들어짐
rapa@rapa:~/0822$ docker-compose scale web=2
WARNING: The scale command is deprecated. Use the up command with the --scale flag instead.
WARNING: The "web" service specifies a port on the host. If multiple containers for this service are created on a single host, the port will clash.
Creating 0822_web_2 ... done- 확인
rapa@rapa:~/0822$ docker-compose ps
Name Command State Ports
-------------------------------------------------------------------------------
0822_db_1 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
0822_web_1 httpd -D FOREGROUND Up 0.0.0.0:8001->80/tcp,:::8001
->80/tcp
0822_web_2 httpd -D FOREGROUND Up 0.0.0.0:8002->80/tcp,:::8002
->80/tcp- 포트를 80으로 수정 하면 ?
rapa@rapa:~/0822$ cat docker-compose.yml
version: '3.7'
services:
web:
image: httpd
ports:
- "8001-8002:80"
command: httpd -D FOREGROUND
depends_on:
- db
links:
- db:mysql
db:
image: mysql:5.7
environment:
- MYSQL_ROOT_PASSWORD=test123
- MYSQL_DATABASE=testdb- compose up
rapa@rapa:~/0822$ docker-compose up -d
0822_db_1 is up-to-date
Stopping and removing 0822_web_2 ... done
Recreating 0822_web_1 ... done0822web2는 사라짐. 0822_web_1은 변경사항이 있게됨(8001:80이었다가 80으로 되었으니)
rapa@rapa:~/0822$ docker-compose ps
Name Command State Ports
-------------------------------------------------------------------------------
0822_db_1 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
0822_web_1 httpd -D FOREGROUND Up 0.0.0.0:49153->80/tcp,:::491
53->80/tcp호스트의 랜덤포트와 컨테이너의 80포트가 연결 된 것을 볼 수 있음
- scale을 3으로 늘림
rapa@rapa:~/0822$ docker-compose scale web=3
WARNING: The scale command is deprecated. Use the up command with the --scale flag instead.
Creating 0822_web_2 ... done
Creating 0822_web_3 ... done- 확인
rapa@rapa:~/0822$ docker-compose ps
Name Command State Ports
-------------------------------------------------------------------------------
0822_db_1 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
0822_web_1 httpd -D FOREGROUND Up 0.0.0.0:49153->80/tcp,:::491
53->80/tcp
0822_web_2 httpd -D FOREGROUND Up 0.0.0.0:49154->80/tcp,:::491
54->80/tcp
0822_web_3 httpd -D FOREGROUND Up 0.0.0.0:49155->80/tcp,:::491
55->80/tcp- scale을 1로 바꾸면 web2, 3은 삭제됨
rapa@rapa:~/0822$ docker-compose scale web=1
WARNING: The scale command is deprecated. Use the up command with the --scale flag instead.
Stopping and removing 0822_web_2 ... done
Stopping and removing 0822_web_3 ... done
rapa@rapa:~/0822$ docker-compose ps
Name Command State Ports
-------------------------------------------------------------------------------
0822_db_1 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
0822_web_1 httpd -D FOREGROUND Up 0.0.0.0:49153->80/tcp,:::491
53->80/tcp- 디렉토리 test1을 만들고 이동 후 상위 디렉토리에 만들었던 yml파일을 복사
rapa@rapa:~/0822$ mkdir test1 ; cd test1
rapa@rapa:~/0822/test1$ cd ../docker-compose.yml .
bash: cd: too many arguments
rapa@rapa:~/0822/test1$ cp ../docker-compose.yml .
rapa@rapa:~/0822/test1$ ls
docker-compose.yml- 만들고 확인
apa@rapa:~/0822/test1$ dc up -d
Creating network "test1_default" with the default driver
Creating test1_db_1 ... done
Creating test1_web_1 ... done
rapa@rapa:~/0822/test1$ dc ps
Name Command State Ports
-------------------------------------------------------------------------------
test1_db_1 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
test1_web_1 httpd -D FOREGROUND Up 0.0.0.0:49156->80/tcp,:::49
156->80/tcp- 네트워크 확인 → 각자 다른 것을 알 수 있음
rapa@rapa:~/0822/test1$ docker network ls
NETWORK ID NAME DRIVER SCOPE
10f5116a06f6 0819_default bridge local
797e325dfacd 0822_default bridge local
56189475fb8a bridge bridge local
3ead376f089f host host local
39430d1f4412 none null local
c0238bf90be3 private1 bridge local
528e7ecee3f1 private2 bridge local
ea7561a51091 test1_default bridge local- -p 옵션을 이용해 다른 디렉토리에 있는 컨테이너를 확인할 수 있다.
rapa@rapa:~/0822/test1$ dc -p 0822 ps
Name Command State Ports
-------------------------------------------------------------------------------
0822_db_1 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
0822_web_1 httpd -D FOREGROUND Up 0.0.0.0:49153->80/tcp,:::491
53->80/tcp- down으로 지울 수 있다.(네트워크도)
rapa@rapa:~/0822/test1$ dc -p 0822 down
Stopping 0822_web_1 ... done
Stopping 0822_db_1 ... done
Removing 0822_web_1 ... done
Removing 0822_db_1 ... done
Removing network 0822_default- 모든 컨테이너와 네트워크 한번에 삭제하기
rapa@rapa:~/0822/test1$ dc down
Stopping test1_web_1 ... done
Stopping test1_db_1 ... done
Removing test1_web_1 ... done
Removing test1_db_1 ... done
Removing network test1_default