ovn-bgp-agent installation issue

Satish Patel satish.txt at gmail.com
Sat Jul 23 04:27:46 UTC 2022


Hi Luis,

As you suggested, checkout 5 commits back to avoid the Load_Balancer issue
that made good progress.

But now i am seeing very odd behavior where floating IP can get exposed to
BGP but when i am trying to expose VM Tenant IP then I get a strange error.
Here is the full logs output;
https://paste.opendev.org/show/buRbY415guvHFUtSapFK/


On Fri, Jul 22, 2022 at 8:55 AM Satish Patel <satish.txt at gmail.com> wrote:

> Hi Luis,
>
> Thank you for reply,
>
> Let me tell you that your blog is wonderful. I have used your method to
> install frr without any docker container.
>
> What is the workaround here? Can I tell ovn-bgp-agent to not look for
> container of frr?
>
> I have notice one more thing that it’s trying to run “copy /tmp/blah
> running-config” but that command isn’t supported.
>
> I have tried to run copy command manually on vtysh shell to see what
> options are available for copy command but there is only one command
> available with copy which is “copy running-config startup-config”  do you
> think I have wrong version of frr running? I’m running 7.2.
>
> Please let me know if any workaround here. Thank you
>
> Sent from my iPhone
>
> On Jul 22, 2022, at 2:41 AM, Luis Tomas Bolivar <ltomasbo at redhat.com>
> wrote:
>
> 
> Hi Satish,
>
> The one to use should be https://opendev.org/x/ovn-bgp-agent. The one on
> my personal github repo was the initial PoC for it. But the opendev one is
> the upstream effort to develop it, and is the one being maintained/updated.
>
> Looking at your second logs, it seems you are missing FRR (and its shell,
> vtysh) in the node.
>
> Actually, thinking about this:
> "Unexpected error while running command.
> Command: /usr/bin/vtysh --vty_socket /run/frr/ -c copy /tmp/tmpiz5s_wvs
> running-config"
>
> The ovn-bgp-agent has been developed with "deploying on containers" in
> mind, meaning it is assuming there is a frr container running, and the
> container running the agent is trying to connect to the same socket so that
> it can run the vtysh commands. Perhaps in your case the frr socket is in a
> different location than /run/frr/
>
> On Fri, Jul 22, 2022 at 6:27 AM Satish Patel <satish.txt at gmail.com> wrote:
>
>> Folks,
>>
>> I am trying to create lab of of ovn-bgp-agent using this blog
>> https://ltomasbo.wordpress.com/2021/02/04/ovn-bgp-agent-testing-setup/
>>
>> So far everything went well but I'm stuck at the bgp-agent
>> installation and I encounter following error when running bgp-agent.
>> Any suggestions?
>>
>> root at rack-1-host-2:/home/vagrant/bgp-agent# bgp-agent
>> 2022-07-22 04:02:39.123 111551 INFO bgp_agent.config [-] Logging enabled!
>> 2022-07-22 04:02:39.475 111551 CRITICAL bgp-agent [-] Unhandled error:
>> AssertionError
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent Traceback (most recent
>> call last):
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/bin/bgp-agent", line 10, in <module>
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     sys.exit(start())
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/bgp_agent/agent.py", line 76, in
>> start
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     bgp_agent_launcher =
>> service.launch(config.CONF, BGPAgent())
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/bgp_agent/agent.py", line 44, in
>> __init__
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     self.agent_driver =
>> driver_api.AgentDriverBase.get_instance(
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/bgp_agent/platform/driver_api.py",
>> line 25, in get_instance
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     agent_driver =
>> stevedore_driver.DriverManager(
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/stevedore/driver.py", line 54, in
>> __init__
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     super(DriverManager,
>> self).__init__(
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/stevedore/named.py", line 78, in
>> __init__
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     extensions =
>> self._load_plugins(invoke_on_load,
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/stevedore/extension.py", line 221,
>> in _load_plugins
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     ext =
>> self._load_one_plugin(ep,
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/stevedore/named.py", line 156, in
>> _load_one_plugin
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     return
>> super(NamedExtensionManager, self)._load_one_plugin(
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/stevedore/extension.py", line 257,
>> in _load_one_plugin
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     obj =
>> plugin(*invoke_args, **invoke_kwds)
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/bgp_agent/platform/osp/ovn_bgp_driver.py",
>> line 64, in __init__
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     self._sb_idl =
>> ovn.OvnSbIdl(
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/bgp_agent/platform/osp/utils/ovn.py",
>> line 62, in __init__
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     super(OvnSbIdl,
>> self).__init__(
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/bgp_agent/platform/osp/utils/ovn.py",
>> line 31, in __init__
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     super(OvnIdl,
>> self).__init__(remote, schema)
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/ovs/db/idl.py", line 283, in
>> __init__
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     schema =
>> schema_helper.get_idl_schema()
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/ovs/db/idl.py", line 2323, in
>> get_idl_schema
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent
>> self._keep_table_columns(schema, table, columns))
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent   File
>> "/usr/local/lib/python3.8/dist-packages/ovs/db/idl.py", line 2330, in
>> _keep_table_columns
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent     assert table_name in
>> schema.tables
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent AssertionError
>> 2022-07-22 04:02:39.475 111551 ERROR bgp-agent
>>
>>
>>
>>
>> After googling I found one more agent at
>> https://opendev.org/x/ovn-bgp-agent and its also throwing an error.
>> Which agent should I be using?
>>
>> root at rack-1-host-2:~# ovn-bgp-agent
>> 2022-07-22 04:04:36.780 111761 INFO ovn_bgp_agent.config [-] Logging
>> enabled!
>> 2022-07-22 04:04:37.247 111761 INFO ovn_bgp_agent.agent [-] Service
>> 'BGPAgent' stopped
>> 2022-07-22 04:04:37.248 111761 INFO ovn_bgp_agent.agent [-] Service
>> 'BGPAgent' starting
>> 2022-07-22 04:04:37.248 111761 INFO
>> ovn_bgp_agent.drivers.openstack.utils.frr [-] Add VRF leak for VRF
>> ovn-bgp-vrf on router bgp 64999
>> 2022-07-22 04:04:37.248 111761 INFO oslo.privsep.daemon [-] Running
>> privsep helper: ['sudo', 'privsep-helper', '--privsep_context',
>> 'ovn_bgp_agent.privileged.vtysh_cmd', '--privsep_sock_path',
>> '/tmp/tmp4cie9eiz/privsep.sock']
>> 2022-07-22 04:04:37.687 111761 INFO oslo.privsep.daemon [-] Spawned new
>> privsep daemon via rootwrap
>> 2022-07-22 04:04:37.598 111769 INFO oslo.privsep.daemon [-] privsep
>> daemon starting
>> 2022-07-22 04:04:37.613 111769 INFO oslo.privsep.daemon [-] privsep
>> process running with uid/gid: 0/0
>> 2022-07-22 04:04:37.617 111769 INFO oslo.privsep.daemon [-] privsep
>> process running with capabilities (eff/prm/inh):
>> CAP_NET_ADMIN|CAP_SYS_ADMIN/CAP_NET_ADMIN|CAP_SYS_ADMIN/none
>> 2022-07-22 04:04:37.617 111769 INFO oslo.privsep.daemon [-] privsep
>> daemon running as pid 111769
>> 2022-07-22 04:04:37.987 111769 ERROR ovn_bgp_agent.privileged.vtysh [-]
>> Unable to execute vtysh with ['/usr/bin/vtysh', '--vty_socket',
>> '/run/frr/', '-c', 'copy /tmp/tmpiz5s_wvs running-config']. Exception:
>> Unexpected error while running command.
>> Command: /usr/bin/vtysh --vty_socket /run/frr/ -c copy /tmp/tmpiz5s_wvs
>> running-config
>> Exit code: 1
>> Stdout: '% Unknown command: copy /tmp/tmpiz5s_wvs running-config\n'
>> Stderr: ''
>> Traceback (most recent call last):
>>   File
>> "/usr/local/lib/python3.8/dist-packages/ovn_bgp_agent/privileged/vtysh.py",
>> line 30, in run_vtysh_config
>>     return processutils.execute(*full_args)
>>   File
>> "/usr/local/lib/python3.8/dist-packages/oslo_concurrency/processutils.py",
>> line 438, in execute
>>     raise ProcessExecutionError(exit_code=_returncode,
>> oslo_concurrency.processutils.ProcessExecutionError: Unexpected error
>> while running command.
>> Command: /usr/bin/vtysh --vty_socket /run/frr/ -c copy /tmp/tmpiz5s_wvs
>> running-config
>> Exit code: 1
>> Stdout: '% Unknown command: copy /tmp/tmpiz5s_wvs running-config\n'
>> Stderr: ''
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service [-] Error
>> starting thread.: oslo_concurrency.processutils.ProcessExecutionError:
>> Unexpected error while running command.
>> Command: /usr/bin/vtysh --vty_socket /run/frr/ -c copy /tmp/tmpiz5s_wvs
>> running-config
>> Exit code: 1
>> Stdout: '% Unknown command: copy /tmp/tmpiz5s_wvs running-config\n'
>> Stderr: ''
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service Traceback (most
>> recent call last):
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service   File
>> "/usr/local/lib/python3.8/dist-packages/oslo_service/service.py", line 806,
>> in run_service
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service
>> service.start()
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service   File
>> "/usr/local/lib/python3.8/dist-packages/ovn_bgp_agent/agent.py", line 50,
>> in start
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service
>> self.agent_driver.start()
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service   File
>> "/usr/local/lib/python3.8/dist-packages/ovn_bgp_agent/drivers/openstack/ovn_bgp_driver.py",
>> line 73, in start
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service
>> frr.vrf_leak(constants.OVN_BGP_VRF, CONF.bgp_AS, CONF.bgp_router_id)
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service   File
>> "/usr/local/lib/python3.8/dist-packages/ovn_bgp_agent/drivers/openstack/utils/frr.py",
>> line 110, in vrf_leak
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service
>> _run_vtysh_config_with_tempfile(vrf_config)
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service   File
>> "/usr/local/lib/python3.8/dist-packages/ovn_bgp_agent/drivers/openstack/utils/frr.py",
>> line 93, in _run_vtysh_config_with_tempfile
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service
>> ovn_bgp_agent.privileged.vtysh.run_vtysh_config(f.name)
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service   File
>> "/usr/local/lib/python3.8/dist-packages/oslo_privsep/priv_context.py", line
>> 271, in _wrap
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service     return
>> self.channel.remote_call(name, args, kwargs,
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service   File
>> "/usr/local/lib/python3.8/dist-packages/oslo_privsep/daemon.py", line 215,
>> in remote_call
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service     raise
>> exc_type(*result[2])
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service
>> oslo_concurrency.processutils.ProcessExecutionError: Unexpected error while
>> running command.
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service Command:
>> /usr/bin/vtysh --vty_socket /run/frr/ -c copy /tmp/tmpiz5s_wvs
>> running-config
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service Exit code: 1
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service Stdout: '%
>> Unknown command: copy /tmp/tmpiz5s_wvs running-config\n'
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service Stderr: ''
>> 2022-07-22 04:04:37.990 111761 ERROR oslo_service.service
>> 2022-07-22 04:04:37.993 111761 INFO ovn_bgp_agent.agent [-] Service
>> 'BGPAgent' stopping
>> 2022-07-22 04:04:37.994 111761 INFO ovn_bgp_agent.agent [-] Service
>> 'BGPAgent' stopped
>>
>
>
> --
> LUIS TOMÁS BOLÍVAR
> Principal Software Engineer
> Red Hat
> Madrid, Spain
> ltomasbo at redhat.com
>
>
>
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