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2016-01-10 10:57:03 -0600 commented answer openstack An unexpected error prevented the server from fulfilling your request. (HTTP 500)

In Revoke section, I replaced driver with your statement, I am getting this error

WARNING: keystoneclient.auth.identity.generic.base Discovering versions from the identity service failed when creating the password plugin. Attempting to determine version from URL.
WARNING: keystoneclient.aut
2016-01-10 10:49:20 -0600 commented answer openstack An unexpected error prevented the server from fulfilling your request. (HTTP 500)

I am following the guide from http://openstack.org In the revoke section its says [revoke] driver = keystone.contrib.revoke.backends.sql.Revoke and in token section its says [token] provider = keystone.token.providers.uuid.Provider driver = keystone.token.persistence.backends.memcache.Token P.S Redhat OS

2016-01-09 20:43:54 -0600 asked a question openstack An unexpected error prevented the server from fulfilling your request. (HTTP 500)
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2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi Traceback (most recent call last):
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi   File "/usr/lib/python2.7/site-packages/keystone/common/wsgi.py", line 239, in __call__
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi     result = method(context, **params)
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi   File "/usr/lib/python2.7/site-packages/keystone/token/controllers.py", line 145, in authenticate
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi     auth_token_data, roles_ref=roles_ref, catalog_ref=catalog_ref)
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi   File "/usr/lib/python2.7/site-packages/keystone/token/provider.py", line 333, in issue_v2_token
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi     self._create_token(token_id, data)
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi   File "/usr/lib/python2.7/site-packages/keystone/token/provider.py", line 190, in _create_token
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi     self._persistence.get_token(token_id)
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi   File "/usr/lib/python2.7/site-packages/keystone/token/provider.py", line 164, in _persistence
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi     self._persistence_manager = persistence.PersistenceManager()
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi   File "/usr/lib/python2.7/site-packages/keystone/common/dependency.py", line 193, in wrapper
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi     self.__wrapped_init__(*args, **kwargs)
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi   File "/usr/lib/python2.7/site-packages/keystone/token/persistence/core.py", line 50, in __init__
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi     super(PersistenceManager, self).__init__(CONF.token.driver)
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi   File "/usr/lib/python2.7/site-packages/keystone/common/manager.py", line 70, in __init__
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi     self.driver = importutils.import_object(driver_name)
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi   File "/usr/lib/python2.7/site-packages/oslo_utils/importutils.py", line 38, in import_object
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi     return import_class(import_str)(*args, **kwargs)
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi   File "/usr/lib/python2.7/site-packages/oslo_utils/importutils.py", line 27, in import_class
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi     __import__(mod_str)
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi ImportError: No module named memchache
2016-01-10 08:09:24.562 18048 TRACE keystone.common.wsgi

I am getting this error while executing this command

openstack --os-auth-url http://controller:35357 \ --os-project-name admin --os-username admin --os-auth-type password \ token issue

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2015-11-26 18:44:42 -0600 answered a question ERROR oslo.messaging._drivers.impl_rabbit [req-b15a657e-8c7a-486d-9a80-7f6013724353 ] AMQP server on controller:5672 is unreachable: [Errno 113] EHOSTUNREACH.

After installing Telnet also I still faced the same issue. The issue was with ipatbles, before starting the OpenStack installation I deactivated iptables (service iptables stop) as mentioned in the OpenStack installation guide from http://www.openstack.org. I was reading a blog were I came across that stopping and flushing (iptables --flush) differ. I taught stop the ipatbles would do the work, Even though I stopped the iptables service, It only worked after I flushed the iptables.

2015-11-26 18:37:31 -0600 commented answer ERROR oslo.messaging._drivers.impl_rabbit [req-b15a657e-8c7a-486d-9a80-7f6013724353 ] AMQP server on controller:5672 is unreachable: [Errno 113] EHOSTUNREACH.

Thanks a lot for educating me on RabbitMQ. After Installing Telnet also it was not working. The culprit was iptables.

2015-11-26 18:35:58 -0600 commented answer ERROR oslo.messaging._drivers.impl_rabbit [req-b15a657e-8c7a-486d-9a80-7f6013724353 ] AMQP server on controller:5672 is unreachable: [Errno 113] EHOSTUNREACH.

Now its working. Telnet was not installed on my nodes. Thanks a Ton..

2015-11-25 19:28:23 -0600 asked a question ERROR oslo.messaging._drivers.impl_rabbit [req-b15a657e-8c7a-486d-9a80-7f6013724353 ] AMQP server on controller:5672 is unreachable: [Errno 113] EHOSTUNREACH.

I am installing Juno version on three nodes namely controller, compute, networking nodes (All are Centos 7). when I am trying to run "systemctl start libvirtd.service openstack-nova-compute.service " its not starting. I checked the nov-compute.log but I am unable to understand the error. Rabbitmq is running on controller node.

2015-11-25 16:07:55.488 4307 INFO oslo.messaging._drivers.impl_rabbit [req-b15a657e-8c7a-486d-9a80-7f6013724353 ] Delaying reconnect for 1.0 seconds...
2015-11-25 16:07:56.489 4307 INFO oslo.messaging._drivers.impl_rabbit [req-b15a657e-8c7a-486d-9a80-7f6013724353 ] Connecting to AMQP server on controller:5672
2015-11-25 16:07:56.507 4307 ERROR oslo.messaging._drivers.impl_rabbit [req-b15a657e-8c7a-486d-9a80-7f6013724353 ] AMQP server on controller:5672 is unreachable: [Errno 113] EHOSTUNREACH. Trying again in 17 seconds.
2015-11-25 19:28:23 -0600 asked a question ERROR oslo.messaging._drivers.impl_rabbit [req-b15a657e-8c7a-486d-9a80-7f6013724353 ] AMQP server on controller:5672 is unreachable: [Errno 113] EHOSTUNREACH.

I am installing Juno version on three nodes namely controller, compute, networking nodes (All are Centos 7). when I am trying to run "systemctl start libvirtd.service openstack-nova-compute.service " its not starting. I checked the nov-compute.log but I am unable to understand the error. Rabbitmq is running on controller node.

2015-11-25 16:07:55.488 4307 INFO oslo.messaging._drivers.impl_rabbit [req-b15a657e-8c7a-486d-9a80-7f6013724353 ] Delaying reconnect for 1.0 seconds...
2015-11-25 16:07:56.489 4307 INFO oslo.messaging._drivers.impl_rabbit [req-b15a657e-8c7a-486d-9a80-7f6013724353 ] Connecting to AMQP server on controller:5672
2015-11-25 16:07:56.507 4307 ERROR oslo.messaging._drivers.impl_rabbit [req-b15a657e-8c7a-486d-9a80-7f6013724353 ] AMQP server on controller:5672 is unreachable: [Errno 113] EHOSTUNREACH. Trying again in 17 seconds.