Error when run mongosh command from Dockerfile ENTRYPOINT

August 3, 2023

I’m setting up MongoDB at local use official image from MongoDB and activate replica set, but I met error when run mongosh command via entrypoint (It’s still work if I ssh to container and run script).

Dockerfile

FROM mongo:6

COPY /certs /certs
COPY /scripts /scripts

EXPOSE 27017

CMD ["bash", "/scripts/setup.sh"]

ENTRYPOINT [ "bash", "/scripts/entrypoint.sh" ]

/scripts/entrypoint.sh

echo "=== Start MongoDB replica set setup ==="

echo "** Setup replica set **"
mongosh --eval "rs.initiate({_id: 'dbrs', members: [{_id: 0, host: 'localhost:27017'}]})"

echo "=== Complete MongoDB replica set setup ==="

And error thrown when execute this bash file via entrypoint: MongoNetworkError: connect ECONNREFUSED 127.0.0.1:27017

Have any solution to fix it? Thanks.

>Solution :

Add a delay before mongosh command then we can ensure that the MongoDB server has enough time to initialize.

#!/bin/bash

echo "=== Start MongoDB replica set setup ==="

# Wait for MongoDB to start
echo "** Waiting for MongoDB to start **"
until mongo --eval "db.adminCommand('ping')" &>/dev/null
do
    sleep 1
done

echo "** MongoDB started, setting up replica set **"
mongosh --eval "rs.initiate({_id: 'dbrs', members: [{_id: 0, host: 'localhost:27017'}]})"

echo "=== Complete MongoDB replica set setup ==="

NOTE – modify entrypoint.sh script to add a delay: