Ceph OSD: how to keep files after umount or reboot vs tempfs ?

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Hello Cephers,

 

I have an issue with OSD device mount on tmpfs with bluestore

For some occasion, I need to keep the files on the tiny bluestore fs (especially keyring and may be other useful files needed for osd to work) on a working OSD

Since osd partition is mount as tmpfs , these files are deleted once VM rebooted or even when umount

 

Is there a way to have a persistent storage for those files instead of tmpfs ?

I could copy them in another location and copy back once rebooted, but this seems very odd

 

May be I need to keep keyring and use ceph-volume command (lvm activate ?) to recover the files

 

Do you have any best practice for this use case ?

 

Thanks a lot for your help!

 

Vincent

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