What if the virtual machine fails to start after the host restarts in OpenStack?

Editor to share with you OpenStack host restart after the failure to start the virtual machine, I believe that most people do not know much, so share this article for your reference, I hope you will learn a lot after reading this article, let's learn about it!

[problem phenomenon] failed to start the virtual machine after rebooting due to physical machine failure. Check the nova-compute.log log and find:

2016-04-06 13 TRACE oslo_messaging.rpc.dispatcher Command 27 VR 06.206 1346 TRACE oslo_messaging.rpc.dispatcher Command: sudo nova-rootwrap / etc/nova/rootwrap.conf iscsiadm-m node-T iqn.2010-10.org.openstack:volume-bdd8edd6-2358-4398-9ef4-bc15b12573ed-p 172.16.70.2 VR 3260-- rescan

2016-04-06 13 TRACE oslo_messaging.rpc.dispatcher Exit code 2714 06.206 1346

View / var/log/messages log discovery

Iscsid: Connection39:0 to [target: iqn.2010-10.org.openstack:volume-bdd8edd6-2358-4398-9ef4-bc15b12573ed, portal: 172.16.70.2 iface 3260] through [iface: default] is shutdown.

[problem Analysis]

[solution]

There is the relevant configuration of target in the / etc/target/ directory. Analyze the contents of saveconfig.json and the contents of backup, and find that the information of authentication has been lost in saveconfig.json. You can restore the backup configuration to saveconfig.json.

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