CODEWITHSUNDEEP
mongodbdockerdocker-composedockerfilemongoimport
Ricky
Ricky

Reputation: 3072

Docker and MongoDB: Start Mongo and Import Data via Dockerfile

I need to use MongoDB with Docker. Up until now i am able to create a container, start the Mongo server and access it from the host machine (via Compass). What i want to do next is import data from a script into the Mongo database that is running in the container. I'm getting the following error when trying to import the data:

Failed: error connecting to db server: no reachable servers

Where's what i'm doing...

docker-compose.yml:

version: '3.7'

services:

  mongodb:
    container_name: mongodb_db
    build:
      context: .
      dockerfile: .docker/db/Dockerfile
      args:
        DB_IMAGE: mongo:4.0.9
    ports:
      - 30001:27017
    environment:
      MONGO_DATA_DIR: /data/db
      MONGO_LOG_DIR: /dev/null

  db_seed:
    build:
      context: .
      dockerfile: .docker/db/seed/Dockerfile
      args:
        DB_IMAGE: mongo:4.0.9
    links:
      - mongodb

mongodb Dockerfile:

ARG DB_IMAGE

FROM ${DB_IMAGE}

CMD ["mongod", "--smallfiles"]

db_seedDockerfile:

ARG DB_IMAGE

FROM ${DB_IMAGE}

RUN mkdir -p /srv/tmp/import
COPY ./app/import /srv/tmp/import

# set working directory
WORKDIR /srv/tmp/import
RUN mongoimport -h mongodb -d dbName--type csv --headerline -c categories --file=categories.csv #Failed: error connecting to db server: no reachable servers
RUN mongo mongodb/dbName script.js

What am I doing wrong here? How can i solve this issue? I would like to keep the current file organisation (docker-compose, mongodb Dockerfile and db_seed Dockerfile).

Upvotes: 1

Views: 2804

Answers (1)

Ricky
Ricky

Reputation: 3072

I found the reason for the issue. The import command is being executed prior to the mongo service being started. To solve this issue i created a .sh script with the import commands and execute it using ENTRYPOINT. This way the script is only executed after the db_seed container is created. Since the the db_seed container depends on the mongobd container, it will only execute the script after the mongo service is started.

db_seedDockerfile

ARG DB_IMAGE

FROM ${DB_IMAGE}


RUN mkdir -p /srv/tmp/import
COPY ./app/import /srv/tmp/import

ENTRYPOINT ["./srv/tmp/import/import.sh"]

Upvotes: 4

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