VMAlert add ability to disable query validation.

[korjavin]

I use loki-promql as datasource for alerts.
For loki query like
sum(count_over_time({app="myapp"}[5m]|="NEVER"))
is valid.

Grafana works with it fine.

When I add it to vmalert like:

      groups:
        - name: myapp
          rules:    
            - alert: import never logs count
              for: 1m
              expr: sum(count_over_time({app="myapp"}[5m]|="NEVER"))>1
              labels:
                app : myapp
                reason : never

I am getting:

invalid expression for rule "never logs count": cannot recognize "|=\"NEVER\"))>1"; unparsed data: "]|=\"NEVER\"))>1"

I'd like to have query validation as optional thing, it will allow me to use loki's promql.

[hagen1778]

Hi @korjavin ! Flag for disabling expressions validation was added in ffa75c4

You can verify it by building vmalert from sources. The change will be also included in next release.

[valyala]

vmalert supports disabling rule expression validation starting from v1.37.1. Closing the feature request as done.