Open Stack

Hi,


You could try running 'ssh -vvv 172.25.31.82' to see if the verbose
output turns up anything interesting ? Also, you could try to move
your ~/.ssh out of the way (mv ~/.ssh ~/.ssh.bak) to do a quick check
to see if there any issues with keyfiles ?


Regards,


John Smith

On Fri, Nov 29, 2013 at 9:29 PM, Sayaji Patil <sayaji15 at gmail.com> wrote:
> Hi John,
>                Yes, before launching any instance, I was able to ssh to the
> switch.
> When I try to create an instance, I see the ssh errors in the logs and after
> that
> I cannot ssh to the switch. It fails with this error
>
> ssh_exchange_identification: Connection closed by remote host
>
>
> Regards,
> Sayaji
>
>
> On Fri, Nov 29, 2013 at 12:17 PM, John Smith <lbalbalba at gmail.com> wrote:
>>
>> Hi,
>>
>>
>> I am by no means an expert on openstack matters, but the 1st thing I
>> think of when seeing that logfile is this:
>>
>> The system running devstack is is trying to start an ssh session to
>> the ip 172.25.31.82, and fails. Are you able to do this manually from
>> the commandline from the same host ? Can you run 'ssh 172.25.31.82'
>> from the commandline of the host running devstack ?
>>
>>
>> Regards,
>>
>>
>> John Smith
>>
>>
>>
>>
>>
>>
>> Regards,
>>
>>
>> John Smith
>>
>> On Fri, Nov 29, 2013 at 8:11 PM, Sayaji Patil <sayaji15 at gmail.com> wrote:
>> > Hi,
>> >      I have set up an all-in-one installation using devstack. When I try
>> > to
>> > create an instance, I get this error when the plugin tries to create a
>> > vlan
>> > on the nexus switch
>> >
>> > 2013-11-27 16:38:29.752 ^[[00;32mDEBUG ncclient.transport.ssh
>> > [^[[00;36m-^[[00;32m] ^[[01;35m^[[00;32mstarting thread (client mode):
>> > 0x4509ed0L^[[00m ^[[00;33mfrom (pid=13833) _log
>> > /usr/lib/python2.6/site-packages/paramiko/transport.py:1406^[[00m
>> > 2013-11-27 16:38:29.753 ^[[01;31mERROR ncclient.transport.ssh
>> > [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31mException: Error reading SSH
>> > protocol banner^[[00m
>> > 2013-11-27 16:38:29.753 ^[[01;31mERROR ncclient.transport.ssh
>> > [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31mTraceback (most recent call
>> > last):^[[00m
>> > 2013-11-27 16:38:29.753 ^[[01;31mERROR ncclient.transport.ssh
>> > [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31m  File
>> > "/usr/lib/python2.6/site-packages/paramiko/transport.py", line 1557, in
>> > run^[[00m
>> > 2013-11-27 16:38:29.753 ^[[01;31mERROR ncclient.transport.ssh
>> > [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31m    self._check_banner()^[[00m
>> > 2013-11-27 16:38:29.754 ^[[01;31mERROR ncclient.transport.ssh
>> > [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31m  File
>> > "/usr/lib/python2.6/site-packages/paramiko/transport.py", line 1683, in
>> > _check_banner^[[00m
>> > 2013-11-27 16:38:29.754 ^[[01;31mERROR ncclient.transport.ssh
>> > [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31m    raise SSHException('Error
>> > reading SSH protocol banner' + str(x))^[[00m
>> > 2013-11-27 16:38:29.754 ^[[01;31mERROR ncclient.transport.ssh
>> > [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31mSSHException: Error reading SSH
>> > protocol banner^[[00m
>> > 2013-11-27 16:38:29.754 ^[[01;31mERROR ncclient.transport.ssh
>> > [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31m^[[00m
>> > 2013-11-27 16:38:29.754 ^[[01;31mERROR neutron.plugins.ml2.managers
>> > [^[[01;36mreq-b51e27b6-2808-47ad-95db-e9d0113fcfe1 ^[[00;36mNone
>> > None^[[01;31m] ^[[01;35m^[[01;31mMechanism driver 'cisco_nexus' failed
>> > in
>> > update_port_postcommit^[[00m
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00mTraceback (most recent call last):
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m  File
>> > "/opt/stack/neutron/neutron/plugins/ml2/managers.py",
>> > line 156, in _call_on_drivers
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m    getattr(driver.obj, method_name)(context)
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m  File
>> >
>> > "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/mech_cisco_nexus.py",
>> > line 159, in update_port_postcommit
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m    self._invoke_nexus_on_port_event(context)
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m  File
>> >
>> > "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/mech_cisco_nexus.py",
>> > line 149, in _invoke_nexus_on_port_event
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m    self._manage_port(vlan_name, vlan_id, host_id,
>> > instance_id)
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m  File
>> >
>> > "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/mech_cisco_nexus.py",
>> > line 114, in _manage_port
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m    vlan_name, port_id)
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m  File
>> >
>> > "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus_network_driver.py",
>> > line 194, in create_and_trunk_vlan
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m    self.create_vlan(nexus_host, vlan_id, vlan_name)
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m  File
>> >
>> > "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus_network_driver.py",
>> > line 131, in create_vlan
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m    self._edit_config(nexus_host, target='running',
>> > config=confstr)
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m  File
>> >
>> > "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus_network_driver.py",
>> > line 68, in _edit_config
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m    mgr = self.nxos_connect(nexus_host)
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m  File
>> >
>> > "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus_network_driver.py",
>> > line 114, in nxos_connect
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m    raise cexc.NexusConnectFailed(nexus_host=nexus_host,
>> > exc=e)
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00mNexusConnectFailed: Unable to connect to Nexus
>> > 172.25.31.82.
>> > Reason: Negotiation failed.
>> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
>> > ^[[01;35m^[[00m
>> > 2013-11-27 16:38:29.755 ^[[01;31mERROR neutron.openstack.common.rpc.amqp
>> > [^[[01;36mreq-b51e27b6-2808-47ad-95db-e9d0113fcfe1 ^[[00;36mNone
>> > None^[[01;31m] ^[[01;35m^[[01;31mException during message handling^[[00m
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00mTraceback (most recent call last):
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m  File
>> > "/opt/stack/neutron/neutron/openstack/common/rpc/amqp.py", line 438, in
>> > _process_data
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m    **args)
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m  File "/opt/stack/neutron/neutron/common/rpc.py", line
>> > 44,
>> > in dispatch
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m    neutron_ctxt, version, method, namespace, **kwargs)
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m  File
>> > "/opt/stack/neutron/neutron/openstack/common/rpc/dispatcher.py", line
>> > 172,
>> > in dispatch
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m    result = getattr(proxyobj, method)(ctxt, **kwargs)
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m  File "/opt/stack/neutron/neutron/plugins/ml2/rpc.py",
>> > line
>> > 192, in update_device_up
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m    q_const.PORT_STATUS_ACTIVE)
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m  File
>> > "/opt/stack/neutron/neutron/plugins/ml2/plugin.py",
>> > line 690, in update_port_status
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m
>> > self.mechanism_manager.update_port_postcommit(mech_context)
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m  File
>> > "/opt/stack/neutron/neutron/plugins/ml2/managers.py",
>> > line 395, in update_port_postcommit
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m    self._call_on_drivers("update_port_postcommit",
>> > context)
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m  File
>> > "/opt/stack/neutron/neutron/plugins/ml2/managers.py",
>> > line 167, in _call_on_drivers
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00m    method=method_name
>> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
>> > ^[[01;35m^[[00mMechanismDriverError: update_port_postcommit failed.
>> >
>> > Also now when I try to manually ssh to the switch, I get this error
>> >
>> > [root at openstackcoi logs]# ssh 172.25.31.82 -l admin
>> > ssh_exchange_identification: Connection closed by remote host
>> >
>> > This is my ml2_conf_cisco.ini
>> >
>> > [ml2_mech_cisco_nexus:172.25.31.82]
>> > openstackcoi=1/1
>> > ssh_port=22
>> > username=admin
>> > password=*******
>> >
>> > Regards,
>> > Sayaji
>> >
>> >
>> >
>> >
>> > _______________________________________________
>> > Mailing list:
>> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> > Post to     : openstack at lists.openstack.org
>> > Unsubscribe :
>> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> >
>
>