I'm trying to connect to MongoDB replica set consists of 3 mongo docker-container, but Error Message: Unable to reach primary for set rs0
occurs.
Git Repository: https://github.com/frontalnh/mongodb-replica-set
I made docker swarm consists of 3 MongoDB docker-container and map each port to localhost: 27017, 27018, 27019
Connecting to a single mongo docker-container is possible by below command
mongo localhost:27017
But When I try to connect to Replica set consists of 3 by below command,
Error Message: Unable to reach primary for set rs0
occurs
Command
mongo "mongodb://localhost:27017,localhost:27018,localhost:27019/testdb?replicaSet=rs0"
Configuration
cfg = {
_id: 'rs0',
members: [
{ _id: 0, host: 'mongo-rs0-1:27017' },
{ _id: 1, host: 'mongo-rs0-2:27017' },
{ _id: 2, host: 'mongo-rs0-3:27017' }
]
};
cfg.protocolVersion = 1;
rs.reconfig(cfg, { force: true });
Docker Compose
version: '3'
services:
mongo-rs0-1:
image: 'mongo-start'
build: ./mongo-rs0-1
ports:
- '27017:27017' # left is computer's port right side is docker internal port
volumes:
- ./mongo-rs0-1/data:/data/db
depends_on:
- 'mongo-rs0-2'
- 'mongo-rs0-3'
mongo-rs0-2:
image: 'mongo'
command: --replSet rs0
command: --config ./conf/mongo.conf
ports:
- '27018:27017'
volumes:
- ./mongo-rs0-2/data:/data/db
- ./mongo-rs0-2/conf:/conf
mongo-rs0-3:
image: 'mongo'
command: --replSet rs0
command: --config ./conf/mongo.conf
ports:
- '27019:27017'
volumes:
- ./mongo-rs0-3/data:/data/db
- ./mongo-rs0-2/conf:/conf
setup-rs:
image: 'setup-rs'
build: ./setup
depends_on:
- 'mongo-rs0-1' # mongo-rs0-1 서비스가 실행중이어야 해당 서비스가 실행될 수 있다.
adminmongo:
image: 'mrvautin/adminmongo'
ports:
- '1234:1234'
I solved it by register host name in localhost
Anyone who needs mongo replica set in localhost can setup replica set with docker-compose.
https://github.com/frontalnh/mongodb-replica-set
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