Greetings,
I've read the relevant sections of the DRBD User Guide, visited various web
sites, and spoken to people in the lists, but I'm still looking for a simple
rule of thumb.
Basically, here is what I've come to understand:
1. If DRBD only lives *above* an LVM volume, then the default LVM filtering
settings are fine; no changes are required to lvm.conf. The LVs will remain
active on all DRBD nodes, and an LVM resource agent is not required.
1. If DRBD lives *below* or *between* LVM volumes, then:
* set global_filter to reject the DRBD backing devices
* set write_cache_state = 0
* set use_lvmetad = 0
* set volume_list to include block devices required to boot
* remove /etc/lvm/cache/.cache.
* run lvscan
* regenerate initrd
* reboot
* Use a cluster resource agent to activate/de-activate LVs as required
by cluster operation
Please feel free to correct any mistakes.
--Eric
[cid:[email protected]]
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