Postgresql 将docker postgres卷装入ubuntu现有postgres数据

我的ubuntu 18.04在本地安装了postgresql。我想将现有数据装载到docker

下面是我的

docker compose.yml

version: '3'
services:
  db:
    image: postgres:10-alpine
    restart: always
    environment:
        POSTGRES_USER: postgres
        POSTGRES_PASSWORD: postgres
    ports:
      - "15432:5432"
    volumes:
      - /etc/postgresql/10/main:/var/lib/postgresql/data

我没有在Ubuntu中更改默认的postgres 10配置。默认情况下，我认为配置位于

/etc/postgresql/10/main

中，数据位于

/var/lib/postgresql/10/main

中

如果我设定

volumes:
   - /var/lib/postgresql/10/main:/var/lib/postgresql/data

它警告说

db_1     | postgres: could not access the server configuration file "/var/lib/postgresql/data/postgresql.conf": No such file or directory

db_1     | initdb: directory "/var/lib/postgresql/data" exists but is not empty
db_1     | If you want to create a new database system, either remove or empty
db_1     | the directory "/var/lib/postgresql/data" or run initdb
db_1     | with an argument other than "/var/lib/postgresql/data".

如果我换成

volumes:
      - /etc/postgresql/10/main:/var/lib/postgresql/data

它警告说

db_1     | postgres: could not access the server configuration file "/var/lib/postgresql/data/postgresql.conf": No such file or directory

db_1     | initdb: directory "/var/lib/postgresql/data" exists but is not empty
db_1     | If you want to create a new database system, either remove or empty
db_1     | the directory "/var/lib/postgresql/data" or run initdb
db_1     | with an argument other than "/var/lib/postgresql/data".

---

如何在不创建新的本地docker卷的情况下解决此问题通过

docker volume create pgdata

您应该能够将两者指定到同一目录中：

volumes:
    - "/var/lib/postgresql/10/main:/var/lib/postgresql/data"
    - "/etc/postgresql/10/main/postgresql.conf:/var/lib/postgresql/data/postgresql.conf"