Hi Dave, On Tue, May 1, 2018 at 4:30 AM, Dave Holland <d...@sanger.ac.uk> wrote: > On Mon, Apr 30, 2018 at 12:41:21PM -0400, Mathieu Gagné wrote: >> Weighers for baremetal cells: >> * ReservedHostForTenantWeigher [7] > ... >> [7] Used to favor reserved host over non-reserved ones based on project. > > Hello Mathieu, > > we are considering writing something like this, for virtual machines not > for baremetal. Our use case is that a project buying some compute > hardware is happy for others to use it, but when the compute "owner" > wants sole use of it, other projects' instances must be migrated off or > killed; a scheduler weigher like this might help us to minimise the > number of instances needing migration or termination at that point. > Would you be willing to share your source code please? >
I'm not sure how battle-tested this code is to be honest but here it is: https://gist.github.com/mgagne/659ca02e63779802de6f7aec8cda612a I had to merge 2 files in one (the weigher and the conf) so I'm not sure if it still works but I think you will get the idea. To use it, you need to define the "reserved_for_tenant_id" Ironic node property with the project ID to reserve it. (through Ironic API) This code also assumes you already filtered out hosts which are reserved for a different tenant. I included that code in the gist too. On a side note, our technicians generally use the forced host feature of Nova to target specific Ironic nodes: https://docs.openstack.org/nova/pike/admin/availability-zones.html But if the customer buys and reserves some machines, he should get them first before the ones in the "public pool". -- Mathieu _______________________________________________ OpenStack-operators mailing list OpenStack-operators@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
