Monitoring GCP with Go library

gcp-monitoring.go

package main

import (
        "context"
        "fmt"

        monitoring "cloud.google.com/go/monitoring/apiv3/v2"
        monitoringpb "google.golang.org/genproto/googleapis/monitoring/v3"
        "google.golang.org/protobuf/types/known/durationpb"
)

func main() {
        ctx := context.Background()

        aClient, err := monitoring.NewAlertPolicyClient(ctx)
        if err != nil {
                panic(err)
        }
        defer aClient.Close()

        // Need to be the full path
        apolReq := &monitoringpb.GetAlertPolicyRequest{
                Name: "projects/my-awesome-project/alertPolicies/4762738326720958127",
        }

        alertPolicy, err := aClient.GetAlertPolicy(ctx, apolReq)
        if err != nil {
                panic(err)
        }
        fmt.Printf("%+v\n", alertPolicy)

        channelReq := &monitoringpb.GetNotificationChannelRequest{
                Name: alertPolicy.NotificationChannels[0],
        }
        chanClient, err := monitoring.NewNotificationChannelClient(ctx)
        if err != nil {
                panic(err)
        }
        defer chanClient.Close()
  
        notificationChannel, err := chanClient.GetNotificationChannel(ctx, channelReq)
        if err != nil {
                panic(err)
        }
        fmt.Printf("%+v\n", notificationChannel)

  
        // Createing new Alert Policy 
        // Aaargh so many structs inside structs inside structs :P
        condType := &monitoringpb.AlertPolicy_Condition_ConditionThreshold{
                ConditionThreshold: &monitoringpb.AlertPolicy_Condition_MetricThreshold{
                        Filter:         "resource.type = \"global\" metric.type = \"custom.googleapis.com/opencensus/certificate_expiration_remaining_seconds\"",
                        Comparison:     monitoringpb.ComparisonType_COMPARISON_LT,
                        ThresholdValue: float64(50),
                        Duration: &durationpb.Duration{
                                Seconds: 300,
                        },
                },
        }

        newCondition := &monitoringpb.AlertPolicy_Condition{
                DisplayName: "My Condition",
                Condition:   condType,
        }
        cond := []*monitoringpb.AlertPolicy_Condition{newCondition}

        aPolicy := &monitoringpb.AlertPolicy{
                DisplayName:          "testkatz",
                Conditions:           cond,
                Combiner:             monitoringpb.AlertPolicy_AND,
                NotificationChannels: []string{"projects/my-awesome-project/notificationChannels/12933047419693956583"},
        }
        req := &monitoringpb.CreateAlertPolicyRequest{
                Name:        "projects/my-awesome-project",
                AlertPolicy: aPolicy,
        }
        resp, err := aClient.CreateAlertPolicy(ctx, req)
        if err != nil {
                panic(err)
        }
        fmt.Printf("Policy created: %+v\n", resp)

}

results.log

$ go run main.go 
name:"projects/my-awesome-project/alertPolicies/4762738326720958127" display_name:"Certificate expiration seconds below the threshold" conditions:{name:"projects/my-awesome-project/alertPolicies/4762738326720958127/conditions/4762738326720954868" display_name:"OpenCensus/certificate_expiration_remaining_seconds [MEAN]" condition_threshold:{filter:"metric.type=\"custom.googleapis.com/opencensus/certificate_expiration_remaining_seconds\" resource.type=\"global\"" aggregations:{alignment_period:{seconds:300} per_series_aligner:ALIGN_MEAN} comparison:COMPARISON_LT threshold_value:432000 duration:{} trigger:{count:1}}} combiner:OR enabled:{value:true} notification_channels:"projects/my-awesome-project/notificationChannels/12933047419693956583" creation_record:{mutate_time:{seconds:1612966766 nanos:484009169} mutated_by:"me@mail.com"} mutation_record:{mutate_time:{seconds:1612966766 nanos:484009169} mutated_by:"me@mail.com"}
type:"slack" name:"projects/my-awesome-project/notificationChannels/12933047419693956583" display_name:"CertBot" labels:{key:"auth_token" value:"******************************************************"} labels:{key:"channel_name" value:"#cert-monitoring"} enabled:{value:true} 12:"ALOTOFTHINGS" 13:"ALOTOFTHINGS"
Policy created: name:"projects/my-awesome-project/alertPolicies/914161344101573541" display_name:"testkatz1" conditions:{name:"projects/my-awesome-project/alertPolicies/914161344101573541/conditions/914161344101575194" display_name:"My Condition" condition_threshold:{filter:"resource.type = \"global\" metric.type = \"custom.googleapis.com/opencensus/certificate_expiration_remaining_seconds\"" comparison:COMPARISON_LT threshold_value:50 duration:{seconds:300}}} combiner:AND enabled:{value:true} notification_channels:"projects/my-awesome-project/notificationChannels/12933047419693956583" creation_record:{mutate_time:{seconds:1616457361 nanos:809946932} mutated_by:"monittest@my-awesome-project.iam.gserviceaccount.com"} mutation_record:{mutate_time:{seconds:1616457361 nanos:809946932} mutated_by:"monittest@my-awesome-project.iam.gserviceaccount.com"}