mongod --bind_ip使用docker-compose版本2

Question

我正在尝试连接在docker上运行的两个mongodb容器docker-compose.一个容器将一些数据播种到另一个容器中mongoimport.

但是,我在运行时遇到以下错误 mongoimport

Failed: error connecting to db server: no reachable servers

其实我可以达到mongodb从容器mongo-seed,因为我会追加一ping -c 3 mongodb到CMD和容器可以成功解析该主机名.

在我正在使用的文件下面:

泊坞窗,compose.yml

version: '2'

services:
  mongodb:
    image: mongo:3.2
    ports:
      - "27017:27017"

  mongo-seed:
    build: ./mongo-seed

蒙戈种子/ Dockerfile

FROM mongo:3.2

COPY init.json /init.json
CMD ping -c 3 mongodb && mongoimport --host mongodb --db test --collection users \
   --type json --file /init.json --jsonArray

蒙戈种子/ init.json

[
  {
    "name": "Joe Smith",
    "email": "jsmith@gmail.com",
    "age": 40,
    "admin": false
  },
  {
    "name": "Jen Ford",
    "email": "jford@gmail.com",
    "age": 45,
    "admin": true
  }
]

这个输出docker-compose up:

mongo-seed_1  | PING mongodb (172.18.0.2): 48 data bytes
mongo-seed_1  | 56 bytes from 172.18.0.2: icmp_seq=0 ttl=64 time=0.116 ms
mongo-seed_1  | 56 bytes from 172.18.0.2: icmp_seq=1 ttl=64 time=0.141 ms
mongo-seed_1  | 56 bytes from 172.18.0.2: icmp_seq=2 ttl=64 time=0.114 ms
mongo-seed_1  | --- mongodb ping statistics ---
mongo-seed_1  | 3 packets transmitted, 3 packets received, 0% packet loss
mongo-seed_1  | round-trip min/avg/max/stddev = 0.114/0.124/0.141/0.000 ms
mongo-seed_1  | 2016-08-09T20:34:15.728+0000    [........................] smtt.devices 0.0 B/25.5 MB (0.0%)
mongo-seed_1  | 2016-08-09T20:34:17.992+0000    [........................] smtt.devices 0.0 B/25.5 MB (0.0%)
mongo-seed_1  | 2016-08-09T20:34:17.992+0000    Failed: error connecting to db server: no reachable servers
mongo-seed_1  | 2016-08-09T20:34:17.992+0000    imported 0 documents
mongo_mongo-seed_1 exited with code 1

任何的想法？我错过了什么？

Answer 1

我终于可以设法连接两个容器了.我的发现是为了记录目的.

要点

• docker-compose版本2创建一个bridge网络并将所有容器添加到它.
• mongod不知道这个网络,因此不绑定到该IP.默认情况下,仅绑定到127.0.0.1
• mongoimport 无法使用容器名称建立连接,即使它应该被转换为容器ip.

解

• 通过a的显式定义为mongodb分配静态IP network
• Init mongo容器,--bind_ip标志指向那个静态ip
• 使用ip地址而不是主机名 mongoimport

泊坞窗,compose.yml

version: '2'

services:
  mongodb:
    image: mongo:3.2
    ports:
      - "27017:27017"
    networks:
      mongo_net:
        ipv4_address: 172.16.0.1
    command: mongod --bind_ip 127.0.0.1,172.16.0.1

  mongo-seed:
    build: ./mongo-seed
    networks:
      mongo_net:
    depends_on:
      - mongodb

networks:
  mongo_net:
    driver: bridge
    ipam:
      config:
      - subnet: 172.16.0.0/24
        gateway: 172.16.0.254

蒙戈种子/ Dockerfile

FROM mongo:3.2

COPY init.json /init.json
CMD mongoimport --host 172.16.0.1 --db test --collection users \
   --type json --file /init.json --jsonArray