# 第10章 Docker 資源管理

# 建立與使用 Docker compose 觀念

將資源統整起來
- Services - Container、Image、Dockerfile
- Network - None、Bridge、Container、Host
- Volume - Container空間、VM linux 空間、Host 空間

# 建立與使用 Docker compose 實作 Services

FROM alpine:latest
ENV myworkdir /var/www/localhost/htdocs
ARG whoami=Jake
WORKDIR ${myworkdir}
RUN apk --update add apache2
RUN rm -rf /var/cache/apk/*
RUN echo "<h3>I am ${whoami}. Iam taking this great Docker Course. Round 01</h3>" >> index.html
RUN echo "<h3>I am ${whoami}. Iam taking this great Docker Course. Round 02</h3>" >> index.html
RUN echo "<h3>I am ${whoami}. Iam taking this great Docker Course. Round 03</h3>" >> index.html
ENTRYPOINT ["http", "-D", "FOREGROUND"]

## 建立 docker compose 設定檔

touch docker-compose.yml (要跟 dockerfile 同一目錄底下)

用編輯器打開 docker-compose.yml

// docker-compose.yml

version: "3.7"
services: 
  myweb:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Tony"
      image: xxx/myweb:latest
      ports:
        - "8080:80" 

回到 terminal

docker-compose build --no-cache // 每次 build 都從新跑一次
docker images
docker-compose up -d (背景執行)
docker container ls
echo $(docker-machine ip)

用 docker-compose 把 container 都下架

docker-compose down

// docker-compose.yml

version: "3.7"
services: 
  myweb:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Jake"
      image: xxx/myweb:latest
      ports:
        - "8080:80" 
  myweb2:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Tony"
      image: xxx/myweb1:latest
      ports:
        - "8081:80" 
  myweb3:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Jane"
      image: xxx/myweb2:latest
      ports:
        - "8082:80" 

docker-compose build --no-cache
docker images
docker-compose up -d
docker container ls
docker-compose down

// docker-compose.yml

version: "3.7"
services: 
  myweb:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Jake"
      image: xxx/myweb:latest
      ports:
        - "8080:80" 
  myweb2:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Tony"
      image: xxx/myweb1:latest
      ports:
        - "8081:80" 
  myweb3:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Jane"
      image: xxx/myweb2:latest
      ports:
        - "8082:80" 
  myweb4:
    image:xxx/myweb:latest
    ports:
        - "8083:80" 

docker-compose build --no-cache
docker images
docker-compose up -d
docker container ls

# 建立與使用 Docker compose 實作 Networks

目錄底下檔案

Dockerfile
docker-compose.yml

docker-compose down
docker-compose up -d
docker network ls
docker network inspect
docker-compose down

打開 docker-compose.yml

// docker-compose.yml

version: "3.7"
services: 
  myweb:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Jake"
      image: xxx/myweb:latest
      ports:
        - "8080:80" 
      networks
        - mybridge001
  myweb2:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Tony"
      image: xxx/myweb1:latest
      ports:
        - "8081:80" 
      networks
        - mybridge001
  myweb3:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Jane"
      image: xxx/myweb2:latest
      ports:
        - "8082:80" 
      networks
        - mybridge001
  myweb4:
    image:xxx/myweb:latest
    ports:
        - "8083:80" 
    networks
        - mybridge002
networks:
  mybridge001:
  mybridge002:

docker-compose build --no-cache
docker-compose up -d
docker network ls
docker network inspect mybridge001

docker network ls
docker network inspect mybridge002

# 建立與使用 Docker compose Volumes

docker-compose down

FROM alpine:latest
ENV myworkdir /var/www/localhost/htdocs
ARG whoami=Jake
WORKDIR ${myworkdir}
RUN apk --update add apache2
RUN rm -rf /var/cache/apk/*
RUN echo "<h3>I am ${whoami}. Iam taking this great Docker Course. Round 01</h3>" >> index.html
RUN echo "<h3>I am ${whoami}. Iam taking this great Docker Course. Round 02</h3>" >> index.html
RUN echo "<h3>I am ${whoami}. Iam taking this great Docker Course. Round 03</h3>" >> index.html
ENTRYPOINT ["http", "-D", "FOREGROUND"]

回到 terminal

docker volume ls

打開 docker-compose.yml

// docker-compose.yml

version: "3.7"
services: 
  myweb:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Jake"
      image: xxx/myweb:latest
      ports:
        - "8080:80" 
      networks
        - mybridge001
  myweb2:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Tony"
      image: xxx/myweb1:latest
      ports:
        - "8081:80" 
      networks
        - mybridge001
  myweb3:
    build:
      context: . (dockerfile 所在目錄)
      args:  (dockfile 裡的 arguments)
        whoami: "Jane"
      image: xxx/myweb2:latest
      ports:
        - "8082:80" 
      networks
        - mybridge001
  myweb4:
    image:xxx/myweb:latest
    ports:
      - "8083:80" 
    networks
      - mybridge002
  myweb5:
    image:xxx/myweb:latest
    ports:
      - "8084:80" 
    networks
      - mybridge002
    volumes:
      - mainpage-vol002:/var/www/localhost/htdocs (apache 首頁目錄位置)
networks:
  mybridge001:
  mybridge002:
volumes:
  mainpage-vol002:

回到 terminal

docker-compose build --no-cache
docker-compose up -d
docker volume ls
docker container ls
echo $(docker-machine ip)

docker container ls
docker exec -it container_id /bin/sh
# ls
# cat index.html
# echo "I made this change in 1997." >> index.html
# exit

docker-compose down
docker container ls
docker-compose up -d

###### tags: `2021` `docker` `docker-compose` `service` `network` `volume`

{%hackmd BJrTq20hE %}