[BOAZ] Docker compose 이론 및 실습

○ docker-compose build ○ docker-compose up # -> pull + build + run ○ docker-compose pull ○ docker-compose ps ○ docker-compose down ○ docker-compose start ○ docker-compose stop ○ docker-compose rm

services: frontend: build: ./frontend ports: - 3000:3000 backend: build: ./backend ports: - 3001:3001 environment: DB_URL: mongodb://database/vidly # 컨테이너명/디비명(볼륨 X) database: image: mongo:4.0-xenial ports: - 27017:27017 volumes: - vidly: /data/db volumes: vidly:

● docker build -t vote ./vote ● docker build -t result ./result ● docker build -t worker ./worker # detached 모드로 위의 컨테이너들을 실행 ● docker run -d --name=redis redis ● docker run -d -e POSTGRES_PASSWORD=postgres --name=db postgres ● docker run -d --name=vote -p 5001:80 vote ● docker run -d --name=result -p 5002:80 result ● docker run -d --name=worker worker ## vote(python app) container로 들어가서 redis와의 통신을 ping을 통해 확인 $ docker exec -it --user root vote sh $ apt-get update && apt update $ apt install -y iputils-ping $ ping redis ping: cannot resolve redis: Unknown host

● docker build -t vote ./vote ● docker build -t result ./result ● docker build -t worker ./worker # 만약 중요한 것이 없다면 아래와 같이 수행 ● docker container rm -f $(docker container ls -aq) # 중요한 컨테이너가 있을 경우 docker ps docker stop {컨테이너 id} docker rm {컨테이너 id} # 네트워크 생성 ● docker network create mynetwork . ├── healthchecks ├── k8s-specifications ├── result # ├── seed-data ├── vote # └── worker # ● docker run -d --name=redis --network mynetwork redis # password 설정과 함께 docker run ● docker run -d --name=db -e POSTGRES_PASSWORD=password --network mynetwork postgres ● docker run -d --name=vote -p 5001:80 --network mynetwork vote ● docker run -d --name=result -p 5002:80 --network mynetwork result ● docker run -d --name=worker --network mynetwork worker ## vote container로 들어가서 redis와의 통신을 확인 $ docker exec -it --user root vote sh $ apt-get update && apt update && apt install -y iputils-ping $ apt install -y iputils-ping $ ping redis # ping redis -> 아래와 같이 통신이 되는 것을 확인 가능! PING redis (172.22.0.2) 56(84) bytes of data. 64 bytes from redis.mynetwork (172.22.0.2): icmp_seq=1 ttl=64 time=0.934 ms 64 bytes from redis.mynetwork (172.22.0.2): icmp_seq=2 ttl=64 time=0.099 ms 64 bytes from redis.mynetwork (172.22.0.2): icmp_seq=3 ttl=64 time=0.135 ms 64 bytes from redis.mynetwork (172.22.0.2): icmp_seq=4 ttl=64 time=0.079 ms 64 bytes from redis.mynetwork (172.22.0.2): icmp_seq=5 ttl=64 time=0.252 ms 64 bytes from redis.mynetwork (172.22.0.2): icmp_seq=6 ttl=64 time=0.235 ms

# ping db PING db (192.168.107.3) 56(84) bytes of data. 64 bytes from db.mynetwork (192.168.107.3): icmp_seq=1 ttl=64 time=0.183 ms 64 bytes from db.mynetwork (192.168.107.3): icmp_seq=2 ttl=64 time=0.048 ms 64 bytes from db.mynetwork (192.168.107.3): icmp_seq=3 ttl=64 time=0.055 ms # 응? 통신은 되는데..?

● docker run -d --name=redis --network mynetwork redis ● docker run -d --name=db -e POSTGRES_PASSWORD=password --network mynetwork postgres ● docker run -d --name=vote -p 5001:80 --network mynetwork vote ● docker run -d --name=result -p 5002:80 --network mynetwork result ● docker run -d --name=worker --network mynetwork worker

# v2 and v3 are now combined! # docker-compose v1.27+ required # % docker-compose version # Docker Compose version v2.15.1 services: vote: build: ./vote # use python rather than gunicorn for local dev command: python app.py ports: - "5001:80" result: build: ./result # use nodemon rather than node for local dev entrypoint: nodemon server.js ports: - "5002:80" worker: build: ./worker redis: image: redis:alpine db: image: postgres:15-alpine environment: POSTGRES_USER: "postgres" POSTGRES_PASSWORD: "postgres"

● 먼저 청소 한번 하기 docker container rm -f $(docker container ls -aq) # docker image rm -f $(docker image ls -q) ● 확인해보기 docker ps -a docker images ● 그리고나서 앞의 docker-compose.mac.yml의 내용을 바탕으로 실행해보기 docker-compose -f docker-compose.mac.yml build docker-compose -f docker-compose.mac.yml up -d ● db 컨테이너 접속 docker exec -it --user=postgres expample-voting-app-db-1 sh / $ whoami postgres / $ psql psql (15.3) Type "help" for help. # \c: Connect to database postgres=# \c You are now connected to database "postgres" as user "postgres". # \dt: List tables postgres=# \dt List of relations Schema | Name | Type | Owner --------+-------+-------+---------- public | votes | table | postgres (1 row) postgres=# select * from votes; id | vote -----------------+------ cb9d5ad7206be28 | a (1 row) exit docker-compose -f docker-compose.mac.yml down ✔ Container example-voting-app-worker-1 Removed 0.6s ✔ Container example-voting-app-db-1 Removed 0.8s ✔ Container example-voting-app-vote-1 Removed 1.0s ✔ Container example-voting-app-result-1 Removed 0.7s ✔ Container example-voting-app-redis-1 Removed 0.9s ✔ Network example-voting-app_default Removed

services: redis: image: redis:alpine db: image: postgres:15-alpine vote: build: ./vote ports: - 5001:80 result: build: ./result ports: - 5002:80 worker: build: ./worker

services: redis: … networks: - back-tier db: … networks: - back-tier vote: … networks: - back-tier - front-tier result: … networks: - back-tier - front-tier worker: … networks: - back-tier networks: back-tier: front-tier:

volumes: db-data:

services: redis: db: vote: result: worker:

services: redis: # db 데이터가 저장되는 컨테이너 내부 디렉토리 장소와 네임드 볼륨을 매핑 db: volumes: - db-data:/var/lib/postgresql/data vote: result: worker: volumes: db-data: