Reviewed: https://review.openstack.org/426531 Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=29490ab1a913e0f4aa68fab8222afeb90ccf5def Submitter: Jenkins Branch: master
commit 29490ab1a913e0f4aa68fab8222afeb90ccf5def Author: David Medberry <[email protected]> Date: Sat Jan 28 17:32:17 2017 -0700 Explain how allow_resize_to_same_host is useful With the ServerGroupAffinityFilter enabled, you need to also set allow_resize_to_same_host to True. Mentioning this in the description for that config setting. ServerGroupAffinity is a scheduler setting that places all servers with the group on the same host. (It is the opposite of AntiAffinity that PREVENTS them from being on the same host.) Consequently, if you try to resize a server that is in an Affinity group (ie, it is affined) it will fail as the current rules IMMEDIATELY remove the current server from the list of possible scheduling targets (unless you have enabled "allow_resize_to_same_host".) Since none of the other servers can be candidates because of the Affinity rule, the resize fails entirely. Change-Id: I77a90ffdfe465d99ee8596375430ee960048d566 Closes-Bug: #1660090 ** Changed in: nova Status: In Progress => Fix Released -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1660090 Title: add better explanation to allow_resize_to_same_host Status in OpenStack Compute (nova): Fix Released Bug description: Currently the config setting: allow_resize_to_same_host only mentions: Allow destination machine to match source for resize. Useful when testing in single-host environments. By default it is not allowed to resize to the same host. Setting this option to true will add the same host to the destination options. However, this setting is NECESSARY to resize hosts in an affined server group via ServerGroupAffinityFilter and while this is a cosmetic setting, it is likely contributing extra work to anyone who allows this filter and generally allows resizing. This was tripped across when doing Trove testing (which allows affinity or a-a for a db cluster.) An issue (cosmetically) in at least Liberty through master (Ocata). To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1660090/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
