Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi all, I have a possibly naive question about a dual primary setup involving LVM devices on top of DRBD. The main question is: using cLVM or native LVM locking, can I safely use a LV block device on the first node, *close it*, and reopen it on the second one? No filesystem is involved and no host is expected to concurrently use the same LV. Scenario: two CentOS 7 + DRBD 8.4 nodes with LVs on top of DRBD on top of a physical RAID array. Basically, DRBD replicate anything written to the specific hardware array. Goal: having a redundant virtual machine setup, where vms can be live migrated between the two hosts. Current setup: I currently run a single-primary, dual nodes setup, where the second host has no access at all to any LV. This setup worked very well in the past years, but it forbid using live migration (the secondary host has no access to the LV-based vdisk attached to the vms, so it is impossible to live migrate the running vms). I thought to use a dual-primary setup to have the LVs available on *both* nodes, using a lock manager to arbitrate access to them. How do you see such a solution? It is workable? Or would you recommend to use a clustered filesystem on top of the dual-primary DRBD device? Thanks. -- Danti Gionatan Supporto Tecnico Assyoma S.r.l. - www.assyoma.it email: g.danti at assyoma.it - info at assyoma.it GPG public key ID: FF5F32A8