DeleteAlarm_test.go - AWS Code Sample

DeleteAlarm_test.go

/* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. This file is licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with the License. A copy of the License is located at http://aws.amazon.com/apache2.0/ This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package main import ( "encoding/json" "errors" "fmt" "io/ioutil" "testing" "time" "github.com/aws/aws-sdk-go/aws" "github.com/aws/aws-sdk-go/aws/session" "github.com/aws/aws-sdk-go/service/cloudwatch" "github.com/aws/aws-sdk-go/service/ec2" "github.com/google/uuid" ) type config struct { InstanceName string `json:"InstanceName"` InstanceID string `json:"InstanceID"` AlarmName string `json:"AlarmName"` } var globalConfig config var configFileName = "config.json" func getEc2Info(sess *session.Session, t *testing.T) (string, string, error) { svc := ec2.New(sess) result, err := svc.DescribeInstances(nil) if err != nil { return "", "", err } for _, reservation := range result.Reservations { for _, instance := range reservation.Instances { id := instance.InstanceId name := "" for _, tag := range instance.Tags { if *tag.Key == "Name" { name = *tag.Value break } } if *id != "" && name != "" { return *id, name, nil } } } return "", "", errors.New("No EC2 instance found with name and ID") } func populateConfig(t *testing.T) error { content, err := ioutil.ReadFile(configFileName) if err != nil { return err } text := string(content) err = json.Unmarshal([]byte(text), &globalConfig) if err != nil { return err } t.Log("Instance Name: " + globalConfig.InstanceName) t.Log("Instance ID: " + globalConfig.InstanceID) t.Log("Alarm name: " + globalConfig.AlarmName) return nil } func createAlarm(sess *session.Session, instanceName *string, instanceID *string, alarmName *string) error { svc := cloudwatch.New(sess) _, err := svc.PutMetricAlarm(&cloudwatch.PutMetricAlarmInput{ AlarmName: alarmName, ComparisonOperator: aws.String(cloudwatch.ComparisonOperatorGreaterThanThreshold), EvaluationPeriods: aws.Int64(1), MetricName: aws.String("CPUUtilization"), Namespace: aws.String("AWS/EC2"), Period: aws.Int64(60), Statistic: aws.String(cloudwatch.StatisticAverage), Threshold: aws.Float64(70.0), ActionsEnabled: aws.Bool(true), AlarmDescription: aws.String("Alarm when server CPU exceeds 70%"), Unit: aws.String(cloudwatch.StandardUnitSeconds), AlarmActions: []*string{ aws.String(fmt.Sprintf("arn:aws:swf:"+*svc.Config.Region+":%s:action/actions/AWS_EC2.InstanceId.Reboot/1.0", *instanceName)), }, Dimensions: []*cloudwatch.Dimension{ { Name: aws.String("InstanceId"), Value: instanceID, }, }, }) if err != nil { return err } return nil } func TestDisableAlarmActions(t *testing.T) { thisTime := time.Now() nowString := thisTime.Format("2006-01-02 15:04:05 Monday") t.Log("Started unit test at " + nowString) sess := session.Must(session.NewSessionWithOptions(session.Options{ SharedConfigState: session.SharedConfigEnable, })) err := populateConfig(t) if err != nil { msg := "Could not get configuration values from " + configFileName t.Fatal(msg) } if globalConfig.AlarmName == "" { id := uuid.New() globalConfig.AlarmName = "Alarm70-" + id.String() if globalConfig.InstanceName == "" || globalConfig.InstanceID == "" { globalConfig.InstanceName, globalConfig.InstanceID, err = getEc2Info(sess, t) if err != nil { t.Fatal(err) } } err := createAlarm(sess, &globalConfig.InstanceName, &globalConfig.InstanceID, &globalConfig.AlarmName) if err != nil { t.Fatal(err) } } err = DeleteAlarm(sess, &globalConfig.AlarmName) if err != nil { t.Fatal(err) } t.Log("Deleted alarm " + globalConfig.AlarmName) }