Cloud Run alerting configuration with Terraform

[Thomas ZAEPFFEL]

Hi All,

I'm trying to code a Cloud Run active  instance count alert with Terraform.

I've tried that, build with samples found on the web  :

 resource "google_monitoring_alert_policy" "cloud_run_instances_count" {

  display_name = "CR Instances count"

  combiner     = "OR"

  conditions {

    display_name = "test condition"

    condition_threshold {

      filter     = "metric.type=\"run.googleapis.com/container/instance_count\" AND metric.labels.state=\"active\" AND resource.type=\"metric\""

      duration   = "60s"

      comparison = "COMPARISON_GT"

      aggregations {

        alignment_period   = "60s"

        per_series_aligner = "ALIGN_RATE"

      }

      trigger {

        count   = 4

      }

    }

   

  }

 notification_channels = "${google_monitoring_notification_channel.xxx.*.id}"

}

But I have the following errors :

Error: Error creating AlertPolicy: googleapi: Error 400: The supplied filter does not specify a valid combination of metric and monitored resource descriptors. The query will not return any time series.

with google_monitoring_alert_policy.cloud_run_instances_count

on _alerting.tf line 11, in resource "google_monitoring_alert_policy" "cloud_run_instances_count":resource "google_monitoring_alert_policy" "cloud_run_instances_count" {

I have no more ideas to make it working; any help would be appreciated !

thks

T.

[Jeff Erbrecht]

Hi Thomas,

Per https://cloud.google.com/monitoring/api/metrics_gcp, the resource for run.googleapis.com/container/instance_count should be cloud_run_revision instead of metric.

Hope this helps,

Jeff

[Thomas ZAEPFFEL]

Hi Jeff,

Thank you,

I've replaced the line 

  filter     = "metric.type=\"run.googleapis.com/container/instance_count\" AND metric.labels.state=\"active\" AND resource.type=\"metric\""

with 

filter     = "metric.type=\"run.googleapis.com/container/instance_count\" AND metric.label.state=\"active\" AND resource.type=\"cloud_run_revision\""

Seems better but an other error occured :

Error: Error creating AlertPolicy: googleapi: Error 400: Field aggregation.perSeriesAligner had an invalid value of "ALIGN_RATE": The aligner cannot be applied to metrics with kind GAUGE and value type INT64.

...

[Igor Peshansky]

The ALIGN_RATE aligner is only valid for CUMULATIVE or DELTA metrics [1]. You need to select an aligner that is valid for GAUGE metrics.

        Igor

[1] https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.alertPolicies#Aligner.ENUM_VALUES.ALIGN_RATE

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[Thomas ZAEPFFEL]

Hi,

Works fine with :

 per_series_aligner = "ALIGN_MEAN"

instead of 

per_series_aligner = "ALIGN_RATE"

Thks !

[Thomas ZAEPFFEL]

Now I'm trying to monitor the Cloud Run requests count with this filter:

filter     = "metric.type=\"run.googleapis.com/request_count\" AND resource.type=\"cloud_run_revision\""

is there a way to add to the filter the service_name field? I did not find the correct prefix/syntax :

filter     = "metric.type=\"run.googleapis.com/request_count\" AND <prefix>.service_name=\"name\" AND resource.type=\"cloud_run_revision\""

thks,

T.

[Thomas ZAEPFFEL]

Found the solution:

filter     = "metric.type=\"run.googleapis.com/request_count\" AND resource.label.service_name=\"name\" AND resource.type=\"cloud_run_revision\""