Re: Help! OSD host failure - recovery without rebuilding OSDs

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Hi

Someone here will probably lay out a detailed answer but to get you started,

All the details for the osd are in the xfs partitions, mirror a new USB key and change ip etc and you should be able to recover.

If the journal is linked to a /dev/sdx, make sure it's in the same spot as it was before..

All the best of luck
/Josef

On 25 Dec 2015 05:39, "deeepdish" <deeepdish@xxxxxxxxx> wrote:
Hello,

Had an interesting issue today.

My OSD hosts are booting off a USB key which, you guessed it has a root partition on there.   All OSDs are mounted.   My USB key failed on one of my OSD hosts, leaving the data on OSDs inaccessible to the rest of my cluster.   I have multiple monitors running other OSD hosts where data can be recovered to.   However I’m wondering if there’s a way to “restore” / “rebuild” the ceph install that was on this host without having all OSDs resync again.

Lesson learned = don’t use USB boot/root drives.   However, now just looking at what needs to be done once the OS and Ceph packages are reinstalled.

Thank you.
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