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Best approach for Docker resilience with two hosts (lemmy.nz)

submitted 2 years ago by Sim@lemmy.nz to c/selfhosted@lemmy.world

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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.

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[–] mertn@lemmy.world 4 points 2 years ago (1 children)

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

[–] Sim@lemmy.nz 1 points 2 years ago (1 children)

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?

[–] mertn@lemmy.world 2 points 2 years ago

I have the OS (with docker) mirrored too. So no reinstalling, just disk or other parts swapping in case of a failure. I hope. A mothboard swap is the worst downtime. I have done this and needed to fiddle with network settings due to changed net interface name to get the server up again.