VMware

Dumb vum+vsan question

If I have a vsan cluster that is say… 10 hosts big, and I’m using VUM to update it, can I just hit remediate on the cluster level, and it will do them one at a time? or will it try to do all of them at once? In the past I’ve done it manually one at a time, but that sucks. would like it to be at least somewhat automated, so all I have to do is monitor (or have our ops team monitor and call me if there is an issue).


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5 Comments

  1. to answer you, it does them 1 at a time.

    not as per your question:

    although it sucks…i prefer the hands on 1 at a time approach. but thats just me.

    occasionally ill see a failed USB stick.

    occasionally a host will fail to go into maint mode due to a guest os stuck with the vmtools still mounted.

    feels like i stay more in tune with everything. i have over 20 hosts with a mix of vsan and regular esxi in various clusters.

  2. >If I have a vsan cluster that is say… 10 hosts big, and I’m using VUM to update it, can I just hit remediate on the cluster level, and it will do them one at a time?

    In general, yes.

  3. Technically yes, but I never fully trusted it. We also did FW at the same time so ensured they were in a baseline!

    Thing that concerned me the most is if a host is slow to come out of MM, and objects did not get a chance to come back into compliance before the next host goes into MM. Had this a couple times and ended up in a tough spot.

  4. Generally what I do is run the cluster with 1 host at a time then go in and clean up the failure cases the next day. Usually I just run into stale ISO mounts, vmware tools updating, that sort of stuff. 9/10 of my VM hosts will update no problem and just 2-3 fail due to not going into maintenance mode (~45 hosts total in the farm) so its not a huge deal to go deal with those guys manually after the others are all done.

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