How to set HAproxy maxconn values with Director?

Environment

• Red Hat OpenStack Platform 10

Issue

• How to set the HAproxy maxconn settings via Director in a YAML template?
• After realizing HAproxy maxconn needs to be updated, how to include this in Director templates so to not get overwritten during a stack update?

Resolution

• Director templates in OSP10 provide a tripleO class we can use to set this. In the network-environment.yaml file for example, these can be set:

  parameter_defaults:
    ControllerExtraConfig:
      tripleo::haproxy::haproxy_global_maxconn: 40960
      tripleo::haproxy::haproxy_default_maxconn: 16384
  

Root Cause

• Need to make the changes suggested in this solution article permanent.

Diagnostic Steps

# [*haproxy_global_maxconn*]
#  The value to use as maxconn in the HAProxy global config section.
#  Defaults to 20480
#
# [*haproxy_default_maxconn*]
#  The value to use as maxconn in the HAProxy default config section.
#  Defaults to 4096

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