为什么初始化程序bash脚本在docker compose上不起作用？

Question

我有一个docker-compose.yml文件，该文件使三个mongo容器包含三个副本集，我的容器构建没有任何问题，但是当我的服务正常运行时setupmongo.sh不起作用。我的意思是rs.initiate（）函数在bash文件上不起作用，但是当我尝试手动运行rs.initiate（）函数及其参数（在docker交互式终端中）时，它在正常工作，我的副本按应有的方式运行。结果，我需要在bash文件上运行rs.initiate（）函数

感谢您的支持。

这里是我的docker-compose.yml文件

version: "3.3"
services:
  mongo-local:
    hostname: mongo-local
    container_name: mongo-local
    image: mongo:4.0.4
    ports: 
      - 27017:27017
    expose:
      - 27017
    restart: always

  mongo1:
    hostname: mongo1
    container_name: mongo1
    image: mongo:4.0.4
    command: mongod --replSet devrs
    volumes:
      - ./mongodb/data1/db:/data/db
      - ./mongodb/data1/configdb:/data/configdb
    networks:
      - mongo-dev-net
    expose:
      - 27017
    ports:
      - 30001:27017
    restart: always
    depends_on:
      - mongo-local

  mongo2:
    hostname: mongo2
    container_name: mongo2
    image: mongo:4.0.4
    command: mongod --replSet devrs
    volumes:
      - ./mongodb/data2/db:/data/db
      - ./mongodb/data2/configdb:/data/configdb
    networks:
      - mongo-dev-net
    expose:
      - 27017
    ports:
      - 30002:27017
    restart: always
    depends_on:
      - mongo-local

  mongo3:
    hostname: mongo3
    container_name: mongo3
    image: mongo:4.0.4
    command: mongod --replSet devrs
    volumes:
      - ./mongodb/data3/db:/data/db
      - ./mongodb/data3/configdb:/data/configdb
    networks:
      - mongo-dev-net
    expose:
      - 27017
    ports:
      - 30003:27017
    restart: always
    depends_on:
      - mongo-local

  mongo-config:
    container_name: mongo-config
    image: mongo:4.0.4
    networks:
      - mongo-dev-net
    links:
    - mongo1:mongo1
    - mongo2:mongo2
    - mongo3:mongo3
    depends_on:
      - mongo1
      - mongo2
      - mongo3
    volumes:
      - ./setupmongo.sh:/setupmongo.sh
    entrypoint: ["/setupmongo.sh"]

networks:
  mongo-dev-net:

和setupmongo.sh文件

#!/bin/bash

echo "Start"

mongo  <<EOF
rs.config()

rs.initiate(
{
    "_id" : "devrs",
    "members" : [
        {
            "_id" : 0,
            "host" : "mongo1:30001",
            "priority": 2
        },
        {
            "_id" : 1,
            "host" : "mongo2:30002",
            "priority": 0
        },
        {
            "_id" : 2,
            "host" : "mongo3:30003",
            "priority": 0
        }
    ]
}
)
EOF

我几乎收到一些错误

mongo-config    | connecting to: mongodb://127.0.0.1:27017
mongo-config    | 2020-01-07T13:23:26.173+0000 E QUERY    [js] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed: SocketException: Error connecting to 127.0.0.1:27017 :: caused by :: Connection refused :
mongo-config    | connect@src/mongo/shell/mongo.js:257:13
mongo-config    | @(connect):1:6
mongo-config    | exception: connect failed
mongo-config exited with code 0

Answer 1

按照您的配置，端口30001、30002和30003是HOST端口，而不是CONTAINER端口。格式为HOST:CONTAINER。参见documentation。

因此，您必须连接到每个容器的27017并相应地更改入口点：mongo1:27010，mongo2:27010，mongo3:27010。

这将起作用，因为您已经在每个容器中暴露了该端口。