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BGP Agent to expose VMs through BGP on OVN environments

License: Apache License 2.0

Python 100.00%

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denizaydin ya-zero

bgp-agent's Issues

BGP Agent is leaking inotify watcher fds

So after leaving the agent running a few hours we had podman dying on us with the following error:
Error: error creating libpod runtime: error configuring CNI network plugin: could not create new watcher too many open files

The problem is that bgp-agent used up all the inotify watchers on the system:
find /proc/*/fd -lname anon_inode:inotify |wc -l

Showed that ~1020 something watchers were being used by the bgp agent container:
root 163246 43.2 21.1 38132540 3425504 ? Ssl Mar16 463:00 _ /usr/bin/python3 /usr/local/bin/bgp-agent

Default numbers:
[root@ctrl-2-0 ~]# cat /proc/sys/fs/inotify/max_*
16384
1024
8192

CRITICAL bgp-agent [-] Unhandled error: AssertionError

Hi,

I am following your blog to create my lab the way you did here https://ltomasbo.wordpress.com/2021/02/04/ovn-bgp-agent-testing-setup/ but i am using Ubuntu 20.04 instead of CentOS8 which is dead and hard to install devstack.

Everything went well but i stuck here when installing bgp-agent

$ python3 setup.py install

Encounter following error when i execute bgp-agent

root@rack-1-host-2:/usr/local/bin# bgp-agent
2022-07-22 03:41:31.321 111323 INFO bgp_agent.config [-] Logging enabled!
2022-07-22 03:41:31.666 111323 CRITICAL bgp-agent [-] Unhandled error: AssertionError
2022-07-22 03:41:31.666 111323 ERROR bgp-agent Traceback (most recent call last):
2022-07-22 03:41:31.666 111323 ERROR bgp-agent   File "/usr/local/bin/bgp-agent", line 10, in <module>
2022-07-22 03:41:31.666 111323 ERROR bgp-agent     sys.exit(start())
2022-07-22 03:41:31.666 111323 ERROR bgp-agent   File "/usr/local/lib/python3.8/dist-packages/bgp_agent/agent.py", line 76, in start
2022-07-22 03:41:31.666 111323 ERROR bgp-agent     bgp_agent_launcher = service.launch(config.CONF, BGPAgent())
2022-07-22 03:41:31.666 111323 ERROR bgp-agent   File "/usr/local/lib/python3.8/dist-packages/bgp_agent/agent.py", line 44, in __init__
2022-07-22 03:41:31.666 111323 ERROR bgp-agent     self.agent_driver = driver_api.AgentDriverBase.get_instance(
2022-07-22 03:41:31.666 111323 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 03:41:31.666 111323 ERROR bgp-agent     agent_driver = stevedore_driver.DriverManager(
2022-07-22 03:41:31.666 111323 ERROR bgp-agent   File "/usr/local/lib/python3.8/dist-packages/stevedore/driver.py", line 54, in __init__
2022-07-22 03:41:31.666 111323 ERROR bgp-agent     super(DriverManager, self).__init__(
2022-07-22 03:41:31.666 111323 ERROR bgp-agent   File "/usr/local/lib/python3.8/dist-packages/stevedore/named.py", line 78, in __init__
2022-07-22 03:41:31.666 111323 ERROR bgp-agent     extensions = self._load_plugins(invoke_on_load,
2022-07-22 03:41:31.666 111323 ERROR bgp-agent   File "/usr/local/lib/python3.8/dist-packages/stevedore/extension.py", line 221, in _load_plugins
2022-07-22 03:41:31.666 111323 ERROR bgp-agent     ext = self._load_one_plugin(ep,
2022-07-22 03:41:31.666 111323 ERROR bgp-agent   File "/usr/local/lib/python3.8/dist-packages/stevedore/named.py", line 156, in _load_one_plugin
2022-07-22 03:41:31.666 111323 ERROR bgp-agent     return super(NamedExtensionManager, self)._load_one_plugin(
2022-07-22 03:41:31.666 111323 ERROR bgp-agent   File "/usr/local/lib/python3.8/dist-packages/stevedore/extension.py", line 257, in _load_one_plugin
2022-07-22 03:41:31.666 111323 ERROR bgp-agent     obj = plugin(*invoke_args, **invoke_kwds)
2022-07-22 03:41:31.666 111323 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 03:41:31.666 111323 ERROR bgp-agent     self._sb_idl = ovn.OvnSbIdl(
2022-07-22 03:41:31.666 111323 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 03:41:31.666 111323 ERROR bgp-agent     super(OvnSbIdl, self).__init__(
2022-07-22 03:41:31.666 111323 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 03:41:31.666 111323 ERROR bgp-agent     super(OvnIdl, self).__init__(remote, schema)
2022-07-22 03:41:31.666 111323 ERROR bgp-agent   File "/usr/local/lib/python3.8/dist-packages/ovs/db/idl.py", line 283, in __init__
2022-07-22 03:41:31.666 111323 ERROR bgp-agent     schema = schema_helper.get_idl_schema()
2022-07-22 03:41:31.666 111323 ERROR bgp-agent   File "/usr/local/lib/python3.8/dist-packages/ovs/db/idl.py", line 2323, in get_idl_schema
2022-07-22 03:41:31.666 111323 ERROR bgp-agent     self._keep_table_columns(schema, table, columns))
2022-07-22 03:41:31.666 111323 ERROR bgp-agent   File "/usr/local/lib/python3.8/dist-packages/ovs/db/idl.py", line 2330, in _keep_table_columns
2022-07-22 03:41:31.666 111323 ERROR bgp-agent     assert table_name in schema.tables
2022-07-22 03:41:31.666 111323 ERROR bgp-agent AssertionError
2022-07-22 03:41:31.666 111323 ERROR bgp-agent

why not expose VM host routes?

Hi,
What is the reason for using gateway chassis for self-service network routing? If the SNAT is not enabled for the Routers, the host routes of the VM can be advertised to the underlay.

And also, for the BGP agent, instead of using kernel space for BGP next-hop, the solution BGP floating IPs over l2 segmented network seems a promising feature. It allows a BGP next-hop address space that can be used for advertising the routes. While creating the router, using this feature, a unique ip address can be assigned to every DVR where FRR will use this ip address as a BGP next-hop. This unique address can also be used for distributed SNAT.

TLS-E Traceback

Heya Luis,

just to not lose track of this one. On a TLS-E env I see the following traceback with the agent:

/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent Traceback (most recent call last):
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/local/bin/bgp-agent", line 10, in <module>
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     sys.exit(start())
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/local/lib/python3.6/site-packages/bgp_agent/agent.py", line 76, in start
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     bgp_agent_launcher = service.launch(config.CONF, BGPAgent())
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/local/lib/python3.6/site-packages/bgp_agent/agent.py", line 45, in __init__
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     CONF.driver)
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/local/lib/python3.6/site-packages/bgp_agent/platform/driver_api.py", line 28, in get_insta
nce
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     invoke_on_load=True
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/lib/python3.6/site-packages/stevedore/driver.py", line 62, in __init__
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     warn_on_missing_entrypoint=warn_on_missing_entrypoint
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/lib/python3.6/site-packages/stevedore/named.py", line 81, in __init__
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     verify_requirements)
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/lib/python3.6/site-packages/stevedore/extension.py", line 233, in _load_plugins
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     self._on_load_failure_callback(self, ep, err)
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/lib/python3.6/site-packages/stevedore/extension.py", line 225, in _load_plugins
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     verify_requirements,
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/lib/python3.6/site-packages/stevedore/named.py", line 158, in _load_one_plugin
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     verify_requirements,
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/lib/python3.6/site-packages/stevedore/extension.py", line 257, in _load_one_plugin
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     obj = plugin(*invoke_args, **invoke_kwds)
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/local/lib/python3.6/site-packages/bgp_agent/platform/osp/ovn_driver.py", line 66, in __ini
t__
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     events=events)
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/local/lib/python3.6/site-packages/bgp_agent/platform/osp/utils/ovn.py", line 46, in __init
__
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     helper = self._get_ovsdb_helper(connection_string)
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/local/lib/python3.6/site-packages/bgp_agent/platform/osp/utils/ovn.py", line 61, in _get_o
vsdb_helper
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     return idlutils.get_schema_helper(connection_string, self.SCHEMA)
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/lib/python3.6/site-packages/ovsdbapp/backend/ovs_idl/idlutils.py", line 183, in get_schema
_helper
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     stream.Stream.open(c))
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/lib64/python3.6/site-packages/ovs/stream.py", line 192, in open
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     error, sock = cls._open(suffix, dscp)
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/lib64/python3.6/site-packages/ovs/stream.py", line 795, in _open
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     ctx.use_privatekey_file(Stream._SSL_private_key_file)
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/lib/python3.6/site-packages/OpenSSL/SSL.py", line 985, in use_privatekey_file
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     keyfile = _path_string(keyfile)
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent   File "/usr/lib/python3.6/site-packages/OpenSSL/_util.py", line 107, in path_string
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent     raise TypeError("Path must be represented as bytes or unicode string")
/var/log/containers/stdouts/bgp_agent.log:2021-03-17T14:54:37.922802270+00:00 stdout F 2021-03-17 14:54:37.918 1 ERROR bgp-agent TypeError: Path must be represented as bytes or unicode string

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