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I have 2 servers using DRBD 8.4.3 for database replication & HA via Corosync, and I'm prepping to do an OS upgrade on these two servers soon.

I am wondering if anyone has done an OS upgrade with DRBD in use, and if so what I should prep for prior to pushing ahead with the OS upgrade. I'll be upgrading via do-release-upgrade on 14.04, so I'll be going through the gamut of 14.04 -> 16.04, then 16.04 -> 18.04.5 as the stopping point.

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    Upgrading from an EOL release to another EOL release will be ... inadvisable. If 18.04.5 is the goal for multiple systems, it may be better for your sanity if you install 18.04 fresh then bring your DRBD configuration and data over as part of a backup-restore validation process ...
    – matigo
    Commented May 10, 2021 at 15:53
  • Does this answer your question? How to install software or upgrade from an old unsupported release?
    – karel
    Commented May 24, 2021 at 4:50

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