CloudStack 4.2.1 And KVM HA

This is an update to my previous blog post on CloudStack + KVM +HA.


Apache CloudStack 4.2.1 seems to have resolved the guest VM failover issues which was present in the earlier versions. The specific tests are:

  1. Reboot a KVM Host in a cluster which has a HA enabled VM running
  2. Power off a KVM Host in a cluster which has a HA enabled VM running

In both cases, Apache CloudStack 4.2.1 did the right thing – the HA enabled VM was restarted on the next available KVM host in the cluster. The entire process took less then 5 minutes with the default global settings.

Apache CloudStack 4.2.1 with KVM hypervisor is now a viable production design. However, please do run fault tolerance test with your version of CloudStack on your environment to ensure that there have been no regression.

Categorized as CloudStack

By Shanker Balan

Shanker Balan is a devops and infrastructure freelancer with over 14 years of industry experience in large scale Internet systems. He is available for both short term and long term projects on contract. Please use the Contact Form for any enquiry.

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