switching carp interface based on multiple upstream availabiity

[opnsenuser]

Hi everyone,
There is a HA setup with two identical machines.
The upstream interfaces are monitored by the builtin monit service on both machines in addition to the gateways.

This way I hope to switch the internal carp interfaces to the machine with more uplinks, but can't find a solution.
Has anyone done a smilar thing or know how to change the carp interface over to an other machine via monit?

If you have other ideas for this please mention them.
Thanks
BR

[opnsenuser]

Hi,
some progress:
the following lines up or down the carp demotion:

Code Select Expand

if[$(sysctl -n net.inet.carp.demotion)<190]; then sysctl -w net.inet.carp.demotion=$(($(sysctl -n net.inet.carp.demotion)+50))
The max value shouldn't surpass the opnsense maximum value of 240 (CARP Persistent Maintenance Mode).

Code Select Expand

if[$(sysctl -n net.inet.carp.demotion)>50]; then sysctl -w net.inet.carp.demotion=$(($(sysctl -n net.inet.carp.demotion)-50))
The demotion value shouln't get below 0.

Sadly the monit start and stop filelds don't take these lines.

Is there the posibility to add these two lines as scripts in a place that the opnsense backup process includes?
also see:    Topic: System backups - development questions https://forum.opnsense.org/index.php?topic=15224.msg69434
Or can the monit dialogs get extended to accept sh commands that run once?

BR