Child host becomes unreachable in redundant group when parent is unreachable about icinga2

[Al2Klimov]

Hello Jose!

Does just Web mis-indicate the reachability or the Icinga 2 API, too?

Best,
A/K

[jjuanino]

Hi Alexander,

in the icinga2 console I get the following (output snipped):

<1> => get_host("poc_child")
{
	__name = "poc_child"
	check_attempt = 1.000000
	check_command = "dummy"
	check_interval = 300.000000
	last_check_result = {
		active = true
		command = "dummy"
		exit_status = 0.000000
		output = "Check was successful."
		previous_hard_state = 99.000000
		vars_after = {
			attempt = 1.000000
			reachable = false    ◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄
			state = 0.000000
			state_type = 1.000000
		}
		vars_before = {
			attempt = 1.000000
			reachable = true
			state = 0.000000
			state_type = 1.000000
		}
	}
	last_reachable = false   ◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄
}

Best regards

[Al2Klimov]

The issue is as follows: when poc_grand_parent becomes down, poc_parent_0 becomes unreachable (as usual), but poc_child also, which is unexpected.

poc_child indeed seems to misbehave, but only after yet another check of itself after poc_grand_parent is down.

[jjuanino]

Yes, that is right, you have to check the services several times to reproduce the issue. The test presented is a bit contrived to show the behavior, but in the real world you get the issue in a more natural way. Regards.