I’m running Docker on Ubuntu server; around 50 containers running, most admin via Portainer. Configuration files and small databases for container applications are stored on the local SSD, media and larger files are stored on a NAS.

NAS data and the container folders are backed up.

I have a second identical machine doing nothing. What would you recommend researching to add resilience to this setup? Top priority is quick and easy restoration should the SSD fail - everything else is relatively easy to replace.

I’ll create an SSD RAID but I like the idea of a second host.

  • Matt The HorwoodEnglish
    11•9 months ago

    Swarm will also spread the load out over both hosts, but all your data would need to be accessible by both hosts

    • @[email protected]OPEnglish
      1•9 months ago

      Thanks. That means I need to move all data off the hosts on to, say, a NAS - then the NAS becomes the single point of failure. Can I operate a swarm without doing that but still duplicate everything from host 1 to host 2, so host 2 could take over relatively seamlessly (apart from local DNS and moving port forwarding to nginx on the remaining host)?

      • Matt The HorwoodEnglish
        2•9 months ago

        Yes could sync the 2 hosts data, you also can use both hosts as nginx upstreams.

      • @StillEnglish
        2•9 months ago

        I think you can run a ceph or glusterfs cluster for sharing files in a cluster