Quiescing filesystem during snapshots

[Philip Coombes]

Hi all,

I have a couple dozen or so Flatcar systems in my home lab and have spent quite a lot of time creating a drop-in system for generating the configs. All works very well and I'm very happy with it so big kudos to the devs.

I noticed the other day (though it's probably been happening for a while, if not forever) that if I create manual snapshots under vSphere or automatically via my backup solution that the file system is never quiesced, even though that option is selected in the options. There are no errors and everything seems to proceed correctly but the resulting snapshot has not has the f/s quiesced. Snapshots taken on Ubuntu VMs are however quiesced with a more or less identical version of open-vmtools.

Does anyone know if there are obvious reason for this, or any config that controls it? Most of the Flatcar VMs are pretty idle most of the time, only one or two have any significant i/o or load. There are no errors logged against vmtools.

Regards

Philip Coombes