BMP test rework #17306
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BMP test rework #17306
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ci:rerun |
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Some python errors: https://github.com/FRRouting/frr/pull/17306/checks?check_run_id=32523042172 |
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| tgen.start_topology() | ||
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| if DEBUG_PCAP: | ||
| tgen.gears["r1"].run("rm /tmp/bmp.pcap") |
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IMO, this should be something more granular, because if you run this in parallel, it won't work... Same for tcpdump below.
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DEBUG_PCAP is never enabled when running tests if this is what you fear.
Eventually, I can add a comment to say to not enable it while in CIP.
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The concern here is that you are writing to a arbitrary bit of the tmp directory when the FRR topotests already have a well established system in place where capturing log files exist in relation to what is going on. Let's try to keep this clean and consistent so that the next person doesn't add something to plain old /tmp and cause a real problem.
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could commit 4118279 help ?
The bgp_bmp and bgp_bmp_vrf tests use similar routines to test the bmp, but are duplicates. Gather the bgp_bmp and the bgp_bmp_vrf tests in a single bgp_bmp folder. - Create a bgpbmp.py library under the bgp_bmp test folder - The bgp_bmp and bgp_bmp_vrf test are renamed to bgp_bmp_1 and bgp_bmp_2 test. - Maintain separate folder for config and output results. Adapt the bgp_bmp library accordingly. - The json output for bgp_bmp_2 test has no referenc to hostame. Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
When configuring the bgp_bmp test with an additional
peer that sends empty AS-PATH, the bmp collector is stopping:
> [2024-10-28 17:41:51] Finished dissecting data from ('192.0.2.1', 33922)
> [2024-10-28 17:41:52] Data received from ('192.0.2.1', 33922): length 195
> [2024-10-28 17:41:52] Got message type: <class 'bmp.BMPRouteMonitoring'>
> [2024-10-28 17:41:52] unpack_from requires a buffer of at least 2 bytes for unpacking 2 bytes at offset 0 (actual buffer size is 0)
> [2024-10-28 17:41:52] TCP session closed with ('192.0.2.1', 33922)
> [2024-10-28 17:41:52] Server shutting down on 192.0.2.10:1789
The parser attempts to read an empty AS-path and considers the length
value as a length in bytes, whereas RFC mentions this value as
definining the number of AS-PAths. Fix this in the parser.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
Use unified configuration procedure. Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
to help identify the file type. And apply black. Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
Multiple BMP tests can run in parallel but, when one instance ends, it kills the BMP server process of all BMP tests. Save the PID of a BMP server and only kill it at the end. Link: FRRouting#17465 Fixes: 875511c ("topotests: add basic bmp collector") Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
DEBUG_PCAP can be set True to manually enable pcap debugging when running bmp tests. Save bmp pcap in logdir (ie. /tmp/topotests/bgp_bmp.bgp_bmp_X/ instead of /tmp. Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
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See individual commits:
The BMP tests use a common library that is duplicate in bgp_bmp and bgp_bmp_vrf test.
Gather the two tests in one, and benefit from the same code.
When testing with an iBGP peering, a fix has been found in current BMP collector implementation regarding the read of the BGP as path attribute. Fix it too.
Protection against killing of undesirable bmp collector when testing multiple bmp tests in parallel: BMPServer in topotests should not
pkill -f bmpserver#17465