Implement docker mongodb replica set config settings inside .yml file - mongodb

Question

I have set a MongoDB replica set which is running properly.
But I want to run the config settings inside the .yml, and not initiating inside a replica set node.
by config settings I mean:
1.
config = {
"_id": "comments",
"members": [
{
"_id": 0,
"host": "node1:27017"
},
{
"_id": 1,
"host": "node2:27017"
},
{
"_id": 2,
"host": "node3:27017"
}
]
}
and the below:
2.
rs.initiate(config)

Answer 1

So i figured out a way, hope it helps.Below i will post my .yml file, rsinit file and rs.sh file, all the file should be placed on the same location in order to work, rest all config are written anyways.
.yml file:
version: '3.7'
services:
mongo1:
hostname: mongo1
container_name: localmongo1
image: mongo
expose:
- 27017
ports:
- 27017:27017
restart: always
entrypoint: ["/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0"]
# volumes:
# - /data/db/mongotest:/data/db # This is where your volume will persist. e.g. VOLUME-DIR = ./volumes/mongodb
mongo2:
hostname: mongo2
container_name: localmongo2
image: mongo
expose:
- 27017
ports:
- 27018:27017
restart: always
entrypoint: ["/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0"]
mongo3:
hostname: mongo3
container_name: localmongo3
image: mongo
expose:
- 27017
ports:
- 27019:27017
restart: always
entrypoint: ["/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0"]
rsinit:
build:
context: .
dockerfile: rsinit
depends_on:
- mongo1
- mongo2
- mongo3
entrypoint: ["sh", "-c", "rs.sh"]
rsinit(normal text file):
FROM mongo
ADD rs.sh /usr/local/bin/
RUN chmod +x /usr/local/bin/rs.sh
rs.sh file:
!/bin/bash
echo "prepare rs initiating"
check_db_status() {
mongo1=$(mongo --host mongo1 --port 27017 --eval "db.stats().ok" | tail -n1 | grep -E '(^|\s)1($|\s)')
mongo2=$(mongo --host mongo2 --port 27017 --eval "db.stats().ok" | tail -n1 | grep -E '(^|\s)1($|\s)')
mongo3=$(mongo --host mongo3 --port 27017 --eval "db.stats().ok" | tail -n1 | grep -E '(^|\s)1($|\s)')
if [[ $mongo1 == 1 ]] && [[ $mongo2 == 1 ]] && [[ $mongo3 == 1 ]]; then
init_rs
else
check_db_status
fi
}
init_rs() {
ret=$(mongo --host mongo1 --port 27017 --eval "rs.initiate({ _id: 'rs0', members: [{ _id: 0, host: 'mongo1:27017' }, { _id: 1, host: 'mongo2:27017' }, { _id: 2, host: 'mongo3:27017' } ] })" > /dev/null 2>&1)
}
check_db_status > /dev/null 2>&1
echo "rs initiating finished"
exit 0