Build MongoDB replicaSet by using docker

docker-mongo.md

• Reference
  • https://stackoverflow.com/questions/63924043/mongo-replicaset-in-docker-couldnt-add-user-not-master
  • https://stackoverflow.com/questions/27187591/deploy-mongodb-replicaset-servers-with-docker-on-different-physical-servers/32180276
  • https://docs.mongodb.com/manual/core/replica-set-priority-0-member/
  • https://www.howtogeek.com/howto/30184/10-ways-to-generate-a-random-password-from-the-command-line/
• Suggestion
  • Review all of the mongod.conf setting when you want to go Production

Script for all server

cd PATH_TO_STORE_DATA
mkdir conf
mkdir db
mkdir backup
mkdir tmp
touch conf/mongod.conf
touch conf/replicaSet.js
date +%s | sha256sum | base64 | head -c 32 > conf/keyfile
chmod 400 conf/keyfile

docker run -d -p 27017:27017 \
--restart always \
-e TZ=THE_TIMEZONE_YOU_WANT \
-v /PATH_TO_STORE_DATA/mongodb:/data/mongo:z \
--user "$(id -u):$(id -g)" \
--name mongo \
-e MONGO_INITDB_ROOT_USERNAME=MONGO_ADMIN_NAME \
-e MONGO_INITDB_ROOT_PASSWORD=MONGO_ADMIN_PASSWORD \
mongo:5.0.3-focal  --config /data/mongo/conf/mongod.conf

Suggest use the mongosh to setup replicaSet , https://docs.mongodb.com/mongodb-shell/

mongosh mongodb://SERVER_1_PUBLIC_IP:27017 -u MONGO_ADMIN_NAME -p MONGO_ADMIN_PASSWORD replicaSet.js

mongod.conf

# mongod.conf
# reference to https://github.com/bitnami/bitnami-docker-mongodb

# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/

# Where and how to store data.
storage:
  dbPath: /data/mongo/db
  journal:
    enabled: true
  directoryPerDB: false  
#  engine:
#  wiredTiger:

# where to write logging data.
# combine log by console with docker logs
systemLog:
  verbosity: 0
  quiet: false
  #destination: file
  #logAppend: true
  #logRotate: reopen
  #path: /data/mongo/logs/mongodb.log
  

# network interfaces
net:
  port: 27017
  unixDomainSocket:
    pathPrefix: /tmp/mongo
  ipv6: false
  bindIpAll: true


# how the process runs
# suggest not to enable it
# https://stackoverflow.com/questions/63210765/is-processmanagement-fork-to-true-needed-when-mongodb-is-only-application-runn
# processManagement:

# security options
security:
  authorization: enabled
  keyFile: /data/mongo/conf/keyfile

#operationProfiling:

## If you dont need the replication , just comment on it
replication:
  replSetName: rs0

#sharding:

# set parameter options
setParameter:
   enableLocalhostAuthBypass: false  

## Enterprise-Only Options:

#auditLog:

#snmp:

replicaSet.js

# for setup replicaSet 
rsconf = {
  _id : "rs0",
  members: [
    { _id : 0, host : "SERVER_1_PUBLIC_IP:27017", priority:1 },
    { _id : 0, host : "SERVER_2_PUBLIC_IP:27017", priority:1 },
    { _id : 0, host : "SERVER_3_PUBLIC_IP:27017", priority:1 }
  ]
}
rs.initiate(rsconf);
rs.conf();