[CLOUDSTACK-8943] KVM HA is broken, let's fix it

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Security Level: Public (Anyone can view this level - this is the default.)
• Environment: Linux distros with KVM/libvirt
• Assignee: Unassigned
• Reporter: Nux
• Created: 09/Oct/15 23:14
• Updated: 09/Oct/17 08:46

Description

Currently KVM HA works by monitoring an NFS based heartbeat file and it can often fail whenever this network share becomes slower, causing the hypervisors to reboot.

This can be particularly annoying when you have different kinds of primary storages in place which are working fine (people running CEPH etc).

Having to wait for the affected HV which triggered this to come back and declare it's not running VMs is a bad idea; this HV could require hours or days of maintenance!

This is embarrassing. How can we fix it? Ideas, suggestions? How are other hypervisors doing it?

Let's discuss, test, implement.

Issue Links

• relates to: CLOUDSTACK-8643 Helper for KVM High Availability