OpenStack Compute (nova)

start nova-compute failure

Asked by Ixora

Hi experts,

 when I run the command(nova-manage service list), I get the below output
root@Userver2:~# nova-manage service list
2012-09-21 17:36:49 DEBUG nova.utils [req-db670af0-2d15-4607-a23d-72dd7d97cb0d None None] backend <module 'nova.db.sqlalchemy.api' from '/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.pyc'> from (pid=10876) __get_backend /usr/lib/python2.7/dist-packages/nova/utils.py:658
Binary Host Zone Status State Updated_At
nova-consoleauth userver1.matrix.com nova enabled :-) 2012-09-21 09:36:45
nova-compute userver1.matrix.com nova enabled XXX 2012-09-21 01:38:53
nova-compute Userver2 nova enabled :-) 2012-09-21 09:36:42
nova-volume userver1.matrix.com nova enabled :-) 2012-09-21 09:36:49
nova-network userver1.matrix.com nova enabled :-) 2012-09-21 09:36:42
nova-scheduler userver1.matrix.com nova enabled :-) 2012-09-21 09:36:41
nova-cert userver1.matrix.com nova enabled :-) 2012-09-21 09:36:48

I noticed that the nova-compute serice can not start. then I run the command (start nova-compute), and I get the following error in the /var/log/nova/nova-compute.log.

2012-09-21 17:29:52 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 114, in wrapped
2012-09-21 17:29:52 TRACE nova return f(*args, **kw)
2012-09-21 17:29:52 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py", line 718, in reboot
2012-09-21 17:29:52 TRACE nova if self._soft_reboot(instance):
2012-09-21 17:29:52 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py", line 754, in _soft_reboot
2012-09-21 17:29:52 TRACE nova dom.create()
2012-09-21 17:29:52 TRACE nova File "/usr/lib/python2.7/dist-packages/libvirt.py", line 551, in create
2012-09-21 17:29:52 TRACE nova if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
2012-09-21 17:29:52 TRACE nova libvirtError: Unable to allow access for disk path /dev/disk/by-path/ip-192.168.172.14:3260-iscsi-iqn.2010-10.org.openstack:volume-00000004-lun-1: No such file or directory
2012-09-21 17:29:52 TRACE nova

Did anyone encounter the same issues?

pls give me some advice to fix it
Any help would be appreciated.

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Yaguang Tang (heut2008) said : 		#1

the reason is that the instance mounts a remote volume before, but duo to some reason, now the volume is not exists in the server. so the instance can't be started, also in your nova.conf I guess you set the
resume_guests_state_on_host_boot=true or start_guests_on_host_boot=true .so nova-compute can't start .

you can change the two config options to false to prevent nova-compute from start the instances at startup time.
or mount the remove volume manually by using iscsiadm

Revision history for this message
Ixora (you-sheng-wang) said : 		#2

the issuse have benn solved. I changed the resume_guests_state_on_host_boot=true and start_guests_on_host_boot=true.

thanks for Yaguang Tang help