All,
I've been pondering a bit about a possible small-scale, HA setup: Hardware 2 Nodes, each with 2 1Gbe and 2 10Gbe NICs Both have hardware RAID controllers, redundant PS, Array controller with BBWC and hot plug SAS drives. If we'd "combine" the quick setup for CentOS6 ( http://docs.cloudstack.apache.org/projects/cloudstack-installation/en/4.9/qi g.html ) with the "additional management server" part ( http://docs.cloudstack.apache.org/projects/cloudstack-installation/en/4.9/ma nagement-server/index.html#additional-management-servers ) then we'd have 2 management servers. To make the local storage of both nodes "HA", one could use DRBD in a "primary-primary" setup, so VM migration is possible as well. (I am not yet clear on how to present this storage to the nodes) To avoid split brain-situations, I see two possible strategies: 1) Direct cabling of the 10Gbe controllers => Loss of connection can only mean either one host is dead, or at least its NIC has died. 2) Usage of IPMI / Fencing Did anybody gather experience in a setup like that? Does anybody have any thoughts on this - improvements, comments, doubts: Hit me! Cheers, JK * I came to this "setup", after a few issues with Xen Server 6.5 combined with "HA-Lizard", which actually uses DRBD in combination with TGTD iSCSI. On the one side, I've had quite a few stability issues with Xen 6.5 and on the other side: The CS MS needs to be outside of this cluster . but still needs to be installed on a redundant / HA piece of kit. JeroenKeerl Keerl IT Services GmbH Birkenstraße 1b. 21521 Aumühle +49 177 6320 317 www.keerl-it.com i...@keerl-it.com Geschäftsführer. Jacobus J. Keerl Registergericht Lubeck. HRB-Nr. 14511 Unsere Allgemeine Geschäftsbedingungen finden Siehier.
