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According to
<a class="moz-txt-link-freetext" href="http://docs.openstack.org/icehouse/install-guide/install/apt/content/cinder-node.html">http://docs.openstack.org/icehouse/install-guide/install/apt/content/cinder-node.html</a>,
I configure a Block Storage service node.<br>
<br>
But
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I try to create a volume, I get error like this:<br>
<br>
2014-09-07 11:37:31.020 33190 ERROR
cinder.scheduler.flows.create_volume
[req-87712243-8548-485a-8b48-30455e05dd4a
e4936e1ce4bf4a5db7850ef606513f88 fc8cc603cbb74c87999bc9cf8e24eb06
- - -] Failed to schedule_create_volume: No valid host was found.<br>
<br>
In this page
<a class="moz-txt-link-freetext" href="http://docs.openstack.org/havana/install-guide/install/apt/content/cinder-node.html">http://docs.openstack.org/havana/install-guide/install/apt/content/cinder-node.html</a><br>
<br>
there are discussions about it, but no solutions.<br>
<br>
thanks for any help.<br>
<br>
<br>
<br>
On 2014年08月25日 19:49, Markus Zoeller wrote:<br>
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<blockquote
cite="mid:OF670288E8.AED71289-ONC1257D3F.003DC396-C1257D3F.0040EA7B@de.ibm.com"
type="cite">
<pre wrap="">javed alam <a class="moz-txt-link-rfc2396E" href="mailto:javedamar@gmail.com"><javedamar@gmail.com></a> wrote on 08/23/2014 02:39:38 PM:
</pre>
<blockquote type="cite">
<pre wrap="">From: javed alam <a class="moz-txt-link-rfc2396E" href="mailto:javedamar@gmail.com"><javedamar@gmail.com></a>
To: openstack <a class="moz-txt-link-rfc2396E" href="mailto:openstack@lists.openstack.org"><openstack@lists.openstack.org></a>, Masoom Alam
<a class="moz-txt-link-rfc2396E" href="mailto:masoom.alam@gmail.com"><masoom.alam@gmail.com></a>
Date: 08/23/2014 02:49 PM
Subject: [Openstack] Fwd: nova instance
...
"Error: Failed to launch instance "nova_testing": Please try again
later [Error: No valid host was found. ]. "
...
i m even unable to find the log files.
</pre>
</blockquote>
<pre wrap="">
Hi Javed,
the error "no valid host found" is thrown by the `nova-scheduler`
service (see [1] for details).
Depending on your testing environment you have to check different things:
1) An "All-In-One" DevStack[2] setup:
* check your `local.conf` file in your devstack folder. There should
be the following lines:
DEST=/opt/stack
LOGFILE=$DEST/logs/stack.sh.log
VERBOSE=True
SCREEN_LOGDIR=$DEST/logs/screen
* The log of the scheduler is then available at:
/opt/stack/logs/screen/screen-n-sch-log
* The scheduler log should contain more information about the cause
Afaik the changes will be applied when the services are restarted. You
can either execute the DevStack scripts `unstack.sh` and `stack.sh` or
use the screen tool (see [4]).
2) A dedicated controller node:
The default folder for nova logs is `/var/log/nova`. The scheduler log
should be there. Maybe you have to turn on debugging in the file
`/etc/nova/nova.conf` in the line `debug=true` and `verbose=true`.
More infos about working with logs can be found at [3].
Sources:
[1] OpenStack configuration reference; Juno Release (draft);
Section "Scheduling<a class="moz-txt-link-rfc2396E" href="http://docs.openstack.org/trunk/config-reference/content/section_compute-scheduler.html[2]DevStack;http://devstack.org/guides/single-machine.html[3]OpenStackCloudAdministratorGuide;Section">"
http://docs.openstack.org/trunk/config-reference/content/section_compute-scheduler.html
[2] DevStack; http://devstack.org/guides/single-machine.html
[3] OpenStack Cloud Administrator Guide; Section "</a>Manage Logs";
<a class="moz-txt-link-freetext" href="http://docs.openstack.org/admin-guide-cloud/content/section_manage-logs.html">http://docs.openstack.org/admin-guide-cloud/content/section_manage-logs.html</a>
[4] IBM Developer Works; 2013-12-06; Restart services of devstack based
openstack;
<a class="moz-txt-link-freetext" href="https://www.ibm.com/developerworks/community/blogs/8160eff1-dedf-408e-9395-9dffeb68749f/entry/working_with_screens_to_restart_service_of_devstack_based_openstack?lang=en">https://www.ibm.com/developerworks/community/blogs/8160eff1-dedf-408e-9395-9dffeb68749f/entry/working_with_screens_to_restart_service_of_devstack_based_openstack?lang=en</a>
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</pre>
</blockquote>
<br>
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