Running Mongo DB Replica Set on three different server by Docker Swarm.
The oplog size sets to 3(MB), because of 5% of free disk space.
- Docker (version >= 17.0.0)
- Docker-Compose
- Compose file(version >= 3.0.0)
sudo apt-get install -y apparmor lxc cgroup-lite curl
wget -qO- https://get.docker.com/ | sh
sudo usermod -aG docker YourUserNameHere
sudo service docker restart
sudo su
curl -L https://github.com/docker/compose/releases/download/1.4.2/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose
exit
docker swarm init --listen-addr *manager-address:2377* --advertise-addr *manager-address*
Output
$ docker swarm init --advertise-addr *manager-address*
Swarm initialized: current node (bvz81updecsj6wjz393c09vti) is now a manager.
To add a worker to this swarm, run the following command:
docker swarm join \
--token *docker-swarm-token* \
*manager-address*
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
ssh <-- The other servers -->
docker swarm join --token *docker-swarm-token* *manager-address*
First, you should update label on each node.
ssh <-- The manager node server -->
docker node update --label-add mongo.replica=1 *manager-address*
docker node update --label-add mongo.replica=2 *worker1-address*
docker node update --label-add mongo.replica=3 *worker2-address*
Second, deploy service on manager node.
ssh <-- The manager node server -->
docker stack deploy -c docker-compose.yml overlay
And, you should login Manager node and run the under command.
./initiate-master
# docker service update --publish-rm 27017:27017 overlay_mongo1
# // if publish port was set before, need to remove first and update it.
docker service update --publish-add 27017:27017 overlay_mongo1
Data is stored at Docker Swarm Volume, if you want to check the Mountpoint on physical machine. Running the following command:
docker volume inspect *service name*
Data will be persistent between service runs. To remove docker stack and all data. Run the following command:
docker stack rm overlay
docker volume rm $(docker volume ls -qf label=com.docker.stack.namespace=overlay)
Leave swarm mode
docker swarm leave