Refactor NGFHigh5xxRate alert to improve host filtering logic

jb3 · jb3 · commit 9eb50474dcaa · 2026-04-30T21:23:42.000+01:00
diff --git a/kubernetes/namespaces/loki/alert_rules.yml b/kubernetes/namespaces/loki/alert_rules.yml
@@ -192,19 +192,21 @@ data:
               (
                 sum by (host) (
                   rate(
-                    {namespace="nginx-gateway", app_container="/nginx", host!~"forms-api.*"}
+                    {namespace="nginx-gateway", app_container="/nginx"}
                     | json
                     | __error__ = ""
+                    | host !~ "forms-api.*"
                     | status >= 500
                     [5m]
                   )
                 )
                 /
                 sum by (host) (
                   rate(
-                    {namespace="nginx-gateway", app_container="/nginx", host!~"forms-api.*"}
+                    {namespace="nginx-gateway", app_container="/nginx"}
                     | json
                     | __error__ = ""
+                    | host !~ "forms-api.*"
                     [5m]
                   )
                 )

Original file line number	Diff line number	Diff line change
`@@ -192,19 +192,21 @@ data:`
`192`	`192`	`(`
`193`	`193`	`sum by (host) (`
`194`	`194`	`rate(`
`195`		`- {namespace="nginx-gateway", app_container="/nginx", host!~"forms-api.*"}`
	`195`	`+ {namespace="nginx-gateway", app_container="/nginx"}`
`196`	`196`	`\| json`
`197`	`197`	`\| __error__ = ""`
	`198`	`+ \| host !~ "forms-api.*"`
`198`	`199`	`\| status >= 500`
`199`	`200`	`[5m]`
`200`	`201`	`)`
`201`	`202`	`)`
`202`	`203`	`/`
`203`	`204`	`sum by (host) (`
`204`	`205`	`rate(`
`205`		`- {namespace="nginx-gateway", app_container="/nginx", host!~"forms-api.*"}`
	`206`	`+ {namespace="nginx-gateway", app_container="/nginx"}`
`206`	`207`	`\| json`
`207`	`208`	`\| __error__ = ""`
	`209`	`+ \| host !~ "forms-api.*"`
`208`	`210`	`[5m]`
`209`	`211`	`)`
`210`	`212`	`)`