upstream_bind_config does not work with UDP. (Connected to #15516)
#15.590 geöffnet am 20. März 2021
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Beschreibung
This issue was opened because @mattklein123 asked to do it in #15516
Using upstream_bind_config field with UDP doesn't seem to work.
Repro steps + Config:
Tested the following config with a socat UDP sender sending datagrams to 127.0.0.1:1234, and socat receiver listening at 127.0.0.1:1235
My full static config is:
upstream_bind_config_test.txt
Expectation:
The expectation was to bind the outgoing connection's source to 127.0.0.2:9999, but it did not happen. socat recv accepted connection from a randomly chosen port at 127.0.0.1 by envoy.
2021/03/17 14:10:30 socat[28284] N accepting UDP connection from AF=2 127.0.0.1:51755
Note:
The same upstream_bind_config configuration works well with HTTP, as you would expect.
@mattklein123 as you mentioned that
The problem with bind config with a single port is it breaks session tracking
May I ask for a deeper explanation on this topic?