- Dec 29, 2009
About 100 containers. Only use KVM for vyatta firewall
Both of them.
Do you have any information about the future ?
I hope openvz will be maintained even if Debian has announced no longer support it in the main branch.
I couldn't find any documentation, how to implement HA for OpenVZ with a SAN. Can you provide a link or some more information?I have an OpenVZ configured with HA, live migration, backup using suspend though but suspension is only a matter of seconds and provided we are talking about a webserver, ftp server or the like a few seconds suspension does not matter much. The same applies to online migration. The two most important part in downtime under backup and migration is read/write sped on storage and bandwidth on network. Provided at least gigabit network and a descent SAN or NAS you should be able to use OpenVZ for HA when the service can tolerate a few seconds downtime under backup and live migration.
For the backup or live migration to work no console must be active or an error like this is shown:
INFO: Can not suspend container: Resource temporarily unavailable
INFO: Error: foreign process 10221/971548(vzctl) inside CT (e.g. vzctl enter or vzctl exec).
INFO: Error: suspend is impossible now.
Requirements: Your storage must be on a shared NFS or SAN.
Tom - for high availability at the service level, like dhcp, dns or ldap , then two containers for each service running on local storage at two different hosts is better for us.To get HA with openvz, you need NFS.