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.

  • Big P@feddit.ukEnglish
    11·
    1 year ago

    You can use docker swarm (or a better container orchestrator) to have the containers automatically fail over to the second host

      • Sim@lemmy.nzOPEnglish
        1·
        1 year 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)?

    • Sim@lemmy.nzOPEnglish
      1·
      1 year ago

      Thanks. Can I use my existing, single Docker to start a new swarm, or do I have to start from scratch?

  • eluvatar@programming.devEnglish
    7·
    1 year ago

    Container orchestration is what you’re looking for. Kubernetes is the most popular, but it might be overkill it’s hard to say based on your setup. However it’s definitely useful experience to know how to run it.

    • Sim@lemmy.nzOPEnglish
      1·
      1 year ago

      Thanks. Could I achieve a simple 2-host solution with Kubernetes though?

  • mertn@lemmy.worldEnglish
    3·
    1 year ago

    I put my dockers on mirrored zfs pool and have enough spare parts in case of breakdowns.

    • Sim@lemmy.nzOPEnglish
      1·
      1 year ago

      So you have Docker itself on a single host (with parts) and all the containers in fault tolerant storage, and the most work you’d have to do in the event of host drive failure is to re-install the OS and Docker itself?

  • mplewis@lemmy.globe.pubEnglish
    1·
    1 year ago

    Learning K8s is a lot to take on, but it will pay off as your needs expand in the long term — and if you decide to go into infra/ops at work.

  • Decronym@lemmy.decronym.xyzBEnglish
    1·
    1 year ago

    Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I’ve seen in this thread:

    Fewer Letters More Letters
    DNS Domain Name Service/System
    HTTP Hypertext Transfer Protocol, the Web
    NAS Network-Attached Storage
    nginx Popular HTTP server

    [Thread #162 for this sub, first seen 24th Sep 2023, 17:15] [FAQ] [Full list] [Contact] [Source code]