octavia/releasenotes/notes/fix-nr_open-limit-value-7f475c3e301a608d.yaml
Gregory Thiemonge 4174f4a5a4 Update nr_open limit value in the amphora
Using haproxy 2.x, the ideal rlimit value for nr_open is close to
connection_limit * 2.5 (see compute_ideal_* in src/haproxy.c).
Set this limit to 2,600,000 in the amphora to support a loadbalancer
with maxconn 1M.

This prevents the following warning messages when launching/reloading
haproxy:

* "Cannot raise FD limit to 2375058, limit is 2097152."
* "FD limit (2097152) too low for maxconn=950000/maxsock=2375058. Please
  raise 'ulimit-n' to 2375058 or more to avoid any trouble."

Change-Id: I6251cd17bd6fa9faf5109e50c2190dda3614908d
2021-08-18 14:21:24 +00:00

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YAML

---
fixes:
- |
Increase the limit value for nr_open and file-max in the amphora, the new
value is based on what HAProxy 2.x is expecting from the system with the
greatest maxconn value that Octavia can set.