无法使用 monstache 使用 URL 连接到 mongodb

Question

I've been trying to synchronize my mongodb with elastic for two days and I'm going crazy. After many attempts and changes in my dockerfile and in my docker-compose I get this error, but the container with mongodb is up and running.

monstache        | ERROR 2018/07/27 17:59:07 Unable to connect to mongodb using URL 'mongodb:27018': no reachable servers
monstache        | panic: Unable to connect to mongodb using URL 'mongodb:27018': no reachable servers
monstache        | 
monstache        | goroutine 1 [running]:
monstache        | log.(*Logger).Panicf(0xc420020c30, 0xd4fc15, 0x2d, 0xc42006fc18, 0x2, 0x2)
monstache        |  /usr/local/go/src/log/log.go:219 +0xdb
monstache        | main.main()
monstache        |  /home/vagrant/go/src/github.com/rwynn/monstache/monstache.go:2400 +0x320
monstache exited with code 2

This is my dockerfile

FROM golang
ADD build-4.4.0/linux-amd64/monstache /go/bin/monstache
ENTRYPOINT ["monstache", "-mongo-url='mongodb:27018'", "-elasticsearch-url=elasticsearch:9200"]

And this is my docker-compose file

version: '3.3'
services:

  mongodb:
    image: mongo
    restart: always 
    container_name: mongodb
    volumes:
      - ./data/mongodb:/usr/share/mongodb/data
    ports:
      - 27018:27017

  elasticsearch:
    image: elasticsearch
    restart: always
    container_name: elasticsearch
    volumes:
      - ./data/elastic:/usr/share/elasticsearch/data
    ports:
      - 9200:9200

  monstache:
    build: ./monstache/
    restart: always
    container_name: monstache
    links:
      - elasticsearch
      - mongodb

Any idea?

Thanks!

Answer 1

Finally, we desist to use monstache, and we use mongo-connector in a python dockerfile to share the data from mongodb to elasticsearch.

FROM python:3.4.3

RUN pip install 'mongo-connector[elastic5]' && \
  pip install 'elastic2-doc-manager[elastic5]'

I hope this can help to someone.

Answer 2

You have to change 'mongo-url' to -mongo-url='mongodb:27017' , because all your containers are running in docker network and mongodb is available there on port 27017 since this is exposed port.

And the below block in compose file will also make mongodb available on your host network at port 27018 but that is accessible via your browser in your local machine env, not in docker network.

ports: - 27018:27017

This compose file should also work without links.

version: '3.3' services: mongodb: image: mongo restart: always container_name: mongodb volumes: - ./data/mongodb:/usr/share/mongodb/data ports: - 27018:27017 elasticsearch: image: elasticsearch restart: always container_name: elasticsearch volumes: - ./data/elastic:/usr/share/elasticsearch/data ports: - 9200:9200 monstache: build: ./monstache/ restart: always container_name: monstache