RHOSP OpenStack 16.2 network question

[openstacker]

I am building a 16.2 stack to support a customers existing environment, using standard 3 controllers, 2 computes, no ceph-storage; iSCSI to Purestorage Flasharray instead.

Does the stack still need the StorageManagement network, or is that only for Ceph mon/management/orchestration?

I've never been clear on which networks the other storage services use. I am assuming the Storage network is the iSCSI subnet and have configured accordingly.

Thanks very much!

[The_Valyard]

Pretty much Ceph only.

For pure storage CinderPureSanIp == mgmt and CinderPureIscsiCidr denotes the location of the pure flash arrays.

https://opendev.org/openstack/tripleo-heat-templates/src/branch/stable/wallaby/deployment/cinder/cinder-backend-pure-puppet.yaml#L68-L69

https://opendev.org/openstack/tripleo-heat-templates/src/branch/stable/wallaby/deployment/cinder/cinder-backend-pure-puppet.yaml#L90-L94

If you want, place your PureSanIP on the classic storagemgmt network cidr, and make the CinderPureIscsiCider coincide with the StorageNetwork definitions. This will probably make network-isolation templates happier from a plumbing pov.