Hi Keith, facing similar issue. Did you ever manage to resolve this? Cheers
On Sunday, 4 April 2021 at 18:36:02 UTC+1 [email protected] wrote: > I'm trying to use the following formula for a stats panel display in > grafana > > pg_up{cluster="[[pgcluster]]"} / > (ccp_is_in_recovery_status{cluster="[[pgcluster]]"}) > > This can return multiple values if there are multiple clusters, which is > expected. However if one of the clusters goes down, the right hand side > metric goes away completely while the left side just changes from 1 to 0. > As it's written above, that makes the metric completely disappear which is > not what I want because then the panel completely goes away in Grafana vs > being able to show a "down" status. > > I've been trying to see about how to handle the right side going null but > still returning a value. I found the vector(0) trick, but it still doesn't > work as expected. For example, for a single cluster: > > pg_up{cluster="alpha"} / ccp_is_in_recovery_status{cluster="alpha"} OR > vector(0) > > If all nodes are up, it still always returns an extra vector(0) in > addition to the normal node values. And if more than one node is down, it > only returns one empty value vs having multiples returned. > > So, basically I'm just trying to have a default value for the right hand > side if that expression happens to go null. Or I guess the more general > question is how do you allow a default value anywhere in a PromQL forumla > when that particular value may go NULL but you still want a metric returned > so you can make use of that. > > Thanks! > > Keith > -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/8c15b3e5-68c4-4604-8dd8-c408fa887e96n%40googlegroups.com.
