grafana-promtheus-elb-query.promql

# NLBs followed ALBs.
# All this does is divides healthy by total (once for NLB and once for ALB) and formats them nicely.
label_replace(
  aws_networkelb_healthy_host_count_average offset 15m / (aws_networkelb_healthy_host_count_average offset 15m + aws_networkelb_un_healthy_host_count_average offset 15m),
  "target_group",
  "$2-$3",
  "target_group",
  "targetgroup/k8s-([A-Za-z]+)-([A-Za-z]+)-([A-Za-z0-9]+)/(.*)"
)
or
label_replace(
  aws_applicationelb_healthy_host_count_average offset 15m / (aws_applicationelb_healthy_host_count_average offset 15m + aws_applicationelb_un_healthy_host_count_average offset 15m),
  "target_group",
  "$2-$3",
  "target_group",
  "targetgroup/k8s-([A-Za-z]+)-([A-Za-z]+)-([A-Za-z0-9]+)/(.*)"
)