Open Stack

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
> >
>
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