On Wed, Feb 06, 2013 at 06:59:10PM +0530, Murali Reddy wrote: > On 06/02/13 4:12 AM, "Prachi Damle" <prachi.da...@citrix.com> wrote: > > > > >As per discussions below, the scope of the feature now consists of a > >generic framework for defining affinity groups in CloudStack and a > >default implementation to support host affinity and anti-affinity. > > Prachi, > > When the granularity of affinity/anti-affinity rule is at host level, will > the rules work in case of externally managed clusters (or integration with > native capabilites), like in case of vmware where it has its own > scheduling and HA behaviour? > > Thanks! > >
The only way that would work, would be to build support for affinity / anti-affinity into the HV plugins themselves, and only use that when HA is delegated to the HV software. DRS is another concern. Sounds quite complex. Perhaps the only option for a reasonable implementation timeframe is to only support scenarios where the HV does not do HA or DRS.
