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dockerdocker-swarmglusterfs

Persisting data in a docker swarm with glusterfs

I have a docker swarm with a lot of containers, but in particolar:

  • mysql
  • mongodb
  • fluentd
  • elasticsearch

My problem is that when a node fails, the manager discards the current container and creates a new one in another node. So everytime i lost the persisting data stored in that particular container even using docker volumes.

So i would create four distributed glusterfs volumes over my cluster, and mount them as docker volumes into my containers.

Is this a correct way to resolve my problem?

If it is, what type of filesystem should i use for my glusterfs volumes?

Are there perfomance problems with this approch?

Solution

  • You might want to take a look at flocker (a volume data manager) which has integration for several container cluster managers, including Docker Swarm.

    You will have to create a volume using flocker driver for each application as pointed by the tutorial:

    ...
volumes:
  mysql:
    driver: "flocker"
    driver_opts:
      size: "10GiB"
      profile: "bronze"
 ...