Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi, I run two node HP Proliant DL140 / Ubuntu 8.04 LTS / Heartbeat 2.1.3-2 cluster with bunch of KVM virtual guests for almost one year. Images for virtual servers are stored in two DRBD 8.0.11 / OCFS2 1.3.9 resources, both in dual-primary mode. I need to upgrade cluster now. My idea is: 1. move all virtual servers to node 1 2. stop Heartbeat and switch to single-primary mode 3. upgrade node 2 to Ubuntu 8.10 (DRBD 8.2.6) 4. switch to dual-primary mode and start Heartbeat If everything would work well I want to continue to upgrade node 1. I can't stop cluster and upgrade both nodes at once. I suppose it's not possible to upgrade running system. But I have no idea about possiblity to combine DRBD 8.0.11 and 8.2.6 nodes. Would mirroring work well then? And should I await some problems in dual-primary mode? Thanks for your ideas. Tomas