docker@多个docker-compose文件下容器互通

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目的

解决不同docker-compose在容器自动注册服务，服务间相互调用不通问题。

解决

通过自定义外部网络，不同文件引用外部网络

1.自定义网络

# 自动选择合适网段创建bridge
docker network create external-net 

# 查看本机所有有网络的子网(防止自定义冲突)
docker network inspect $(docker network ls -q) | grep Subnet

# 创建自定义bridge
docker network create \
  --driver=bridge \
  --subnet=192.168.100.0/24 \
  --gateway=192.168.100.1 \
  shared-net

2.引用外部网络

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# 1
version: "3.8"

services:
  app1:
    image: myapp1
    networks:
      - shared-net

networks:
  shared-net:
    external: true

---
# 2
version: "3.8"

services:
  app2:
    image: myapp2
    networks:
      - shared-net

networks:
  shared-net:
    external: true

app1和app2都连接到了shared-net网络中,容器名最好显式设置container_name

3.支持自定义容器ip

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# 容器ip非固定
version: "3.8"

services:
  app:
    image: myapp
    networks:
      - shared-net

networks:
  shared-net:
    external: true
---

# 自定义容器ip
version: "3.8"

services:
  app:
    image: nginx
    networks:
      shared-net:
        ipv4_address: 192.168.100.10

networks:
  shared-net:
    external: true

4.查看本机所有容器ip

docker inspect -f '{{ .Name }} - {{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $(docker-compose ps -q)