Hello everyone, I inherited an xCat 2.16.3 system after the previous sysadmin left nor with any handover notes.
I recently upgraded some nodes from RHEL6 to RHEL7 x86_64 via xCat without any issues on the cluster. After my users tested stuff out the past month and there were no screams, I went to update the remainder of the nodes by installing them with RHEL7 via the xCat system just as before. The installs seemed to go fine as last time, the nodes PXE-booted, caught the boot image, installed stuff, then rebooted, did more updates and then rebooted again. It was here that all the updated nodes in this batch are failing and dropping to the dracut emergency shell. I checked (tabdump'd around) all the node settings, lsdef, etc. and nothing has changed since the first batch of nodes were successfully updated previously. It appears the /dev/mapper/xcatvg-root went missing, the actual member partition of the vg (/dev/sda4) is present with the TYPE=LVM2_member declaration but just isn't associated with xcatvg-root (no other vg's present either). I'm sure I can fix it with a rescue media boot, create the xcatvg-root vg and add /dev/sda4 to it, but I'm at a loss why to understand why my xCat system worked fine previously updating nodes last month and now it suddenly doesn't. All the server hardware/firmware involved are identical. Any ideas where I should be looking? Cheers, S
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