ISSUE TYPE

Bug Report

COMPONENT NAME

KVM

CLOUDSTACK VERSION

All 4.x and 2.x versions seem to be affected.

CONFIGURATION

N/A

OS / ENVIRONMENT

This issue is related to KVM hosts. As far as I can see, XEN hosts are affected too.

SUMMARY

KVM hosts are being rebooted by kvmheartbeat.sh when the NFS-server that is being used as a primary storage becomes unreachable.

I'd like to propose change behavior of kvmheartbeat.sh, as it's not necessary to reboot a whole host when only one of VMs is having difficulties while other VMs are working fine with other storages.

STEPS TO REPRODUCE

It's easy to reproduce: just deploy a VM with a volume on an NFS-based storage, break NFS and wait.

EXPECTED RESULTS

The KVM host will be reset.

ACTUAL RESULTS

The kvmscript.sh will reboot the server.