CARP role doesn't switch properly after updating to 19.1.8

[katamadone [CH]]

nope, very sure - tried it multiple times

[mimugmail]

System log of master when you entering mnt mode please

[mimugmail]

I found a HA cluster running 19.1.7 live, I compared sysctl before, while and after mnt mode .. on master and slave, for 19.1.7, 19.1.10 and 19.7.2. It worked as expected on all version, no stucks, nothing.

I can upload all files if needed.

[katamadone [CH]]

damn.. thats so strange - currently have no idea
Is that HA cluster virtualized on ESXi?

[mimugmail]

No, Hardware, old school :8

[katamadone [CH]]

I've got the feeling that something did change with that whole
- ESXi
- Portgroup
- Net.ReversePathFwdCheckPromisc
- Promicious Mode
- LAG / no LAG
- LoadBalancing Hash based / Originating interface

But what I don't understand is what changed in that case with 19.1.8

[mimugmail]

In 19.1.7 maintenance mode was set some way of disable carp, with this you had a 3 times packet loss within migration time. In 19.1.8 this was changed to higher the demotion on the master to force a switch, which works without packet loss.

If your demotions are not even from the beginning it wont work, so 99% of the times it's a config error.

[mimugmail]

https://github.com/opnsense/core/issues/3671#issuecomment-525004560

[katamadone [CH]]

All these fixes until 19.7.4_1 did the trick. Testing a little bit more today but now it's looking good!
And even the necessary reboot is fixed now