Open Stack

Hi Yang,

Please check your message queue service (rabbitmq) and neutron-openvswitch services in output of openstack-status command.

If neutron-openvswitch is not active then you will first need to fix it and get it started.

Regards,
Ambadas Ramanna Adam

From: yanghq [mailto:yanghq at neusoft.com]
Sent: Thursday, September 11, 2014 2:55 PM
To: openstack at lists.openstack.org
Subject: [Openstack] error about Block Storage service node


According to http://docs.openstack.org/icehouse/install-guide/install/apt/content/cinder-node.html, I configure a Block Storage service node.

But I try to create a volume, I get error like this:

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.

In this page http://docs.openstack.org/havana/install-guide/install/apt/content/cinder-node.html

there are discussions about it, but no solutions.

thanks for any help.



On 2014年08月25日 19:49, Markus Zoeller wrote:

javed alam <javedamar at gmail.com><mailto:javedamar at gmail.com> wrote on 08/23/2014 02:39:38 PM:



From: javed alam <javedamar at gmail.com><mailto:javedamar at gmail.com>

To: openstack <openstack at lists.openstack.org><mailto:openstack at lists.openstack.org>, Masoom Alam

<masoom.alam at gmail.com><mailto:masoom.alam at gmail.com>

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.



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" <http://docs.openstack.org/trunk/config-reference/content/section_compute-scheduler.html%5b2%5dDevStack;http:/devstack.org/guides/single-machine.html%5b3%5dOpenStackCloudAdministratorGuide;Section>

http://docs.openstack.org/trunk/config-reference/content/section_compute-scheduler.html <http://docs.openstack.org/trunk/config-reference/content/section_compute-scheduler.html%5b2%5dDevStack;http:/devstack.org/guides/single-machine.html%5b3%5dOpenStackCloudAdministratorGuide;Section>

[2] DevStack; http://devstack.org/guides/single-machine.html <http://docs.openstack.org/trunk/config-reference/content/section_compute-scheduler.html%5b2%5dDevStack;http:/devstack.org/guides/single-machine.html%5b3%5dOpenStackCloudAdministratorGuide;Section>

[3] OpenStack Cloud Administrator Guide; Section "<http://docs.openstack.org/trunk/config-reference/content/section_compute-scheduler.html%5b2%5dDevStack;http:/devstack.org/guides/single-machine.html%5b3%5dOpenStackCloudAdministratorGuide;Section>Manage Logs";



http://docs.openstack.org/admin-guide-cloud/content/section_manage-logs.html

[4] IBM Developer Works; 2013-12-06; Restart services of devstack based

    openstack;

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





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