confirmed that this was caused by hosts running short on RAM limit. But not sure where the limit was set (maybe in Rabbitmq-server?)
** Changed in: nova Status: New => Invalid -- 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/1255658 Title: Error launching an instance: nova scheduler driver: Setting instance to ERROR state. Status in OpenStack Compute (Nova): Invalid Bug description: My stack (one all-in-one node + one compute node) had been working fine. Then it started to have error launching instances with the following observations: 1) Horizon reports success, but instance status is "Error"; 2) no error/warning from nova-compute.log 3) nova-scheduler.log has this error: WARNING nova.scheduler.driver [req-ff98dcde-c88b-40e1-85c4-6bb89b627c44 24477163d7ca46a38b9d45360a395d59 8db3509086494bc3a0a5174c26392bb1] [instance: 380fbb79-dbdb-407d-bd89-78afeba8e83d] Setting instance to ERROR state. 4) "nova-manage service list" shows everything is working properly on both nodes. 5) there are plenty of diskspace (mounted nfs on /var/lib/nova/instances) 6) restarted all nova/quantum services but did not help. Some suggested to check rabbitmq-plugin for the Disk limit, but there was no warning/error on Disk limits. To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1255658/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp