Merge pull request #26 from prafulmehrotra/master

Added LB latency alarm

README.md

@@ -129,6 +129,7 @@ The **_fargate.cfn.yml_** template creates:
 - A CodeBuild service role
 - An [Elastic Container Registry (ECR)](https://docs.aws.amazon.com/AmazonECR/latest/userguide/what-is-ecr.html) repository
 - An [Application Load Balancer (ALB)](https://docs.aws.amazon.com/elasticloadbalancing/latest/application/introduction.html)
+- A CloudWatch Alarm for ALB latency
 - An [ALB Route 53 record](https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/routing-to-elb-load-balancer.html)
 - ELB target groups stuff
 - A [Fargate task definition](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/create-task-definition.html)

templates/fargate.cfn.yml

@@ -177,6 +177,36 @@ Parameters:
       - prod
     ConstraintDescription: Specify either dev or prod
 
+  LoadBalancerAlarmEvaluationPeriods:
+    Description: The number of periods over which data is compared to the specified threshold 
+    Type: Number
+    Default: 2
+    MinValue: 2
+    ConstraintDescription: Must be at least two
+
+  LoadBalancerAlarmEvaluationPeriodSeconds:
+    Description: The time over which the specified statistic is applied. Specify time in seconds, in multiples of 60. 
+    Type: Number
+    Default: 300
+    MinValue: 60
+    ConstraintDescription: Must be at least 60 seconds
+
+  LoadBalancerLatencySeconds:
+    Description: LoadBalancer latency threshold, in seconds
+    Type: Number
+    Default: 1
+    MinValue: 1
+    ConstraintDescription: Must be atleast one
+
+  EnableLBAlarm:
+    Description: Set to true to enable load balancer latency alarm
+    Type: String
+    ConstraintDescription: Value must be true or false
+    Default: false
+    AllowedValues:
+      - true
+      - false    
+
 Conditions:
 
    IsTlsEnabled: !Not [ !Equals [ !Ref SSLCertificateArn, "" ] ]
@@ -187,6 +217,8 @@ Conditions:
      - !Not [ !Equals [ !Ref LoadBalancerDomainName, "" ] ]
      - !Not [ !Equals [ !Ref HostedZoneName, "" ] ]
 
+   IsLBAlarmEnabled: !Equals [ !Ref EnableLBAlarm, true ]  
+
 Resources:
 
   DefaultContainerBucket:
@@ -715,6 +747,33 @@ Resources:
     - DefaultTargetGroup
     - ApplicationLoadBalancer
 
+  LBLatency:
+    Type: AWS::CloudWatch::Alarm
+    Condition: IsLBAlarmEnabled
+    Properties: 
+      AlarmName: LoadBalancer Latency Alarm
+      AlarmDescription: !Sub LB latency is over ${LoadBalancerLatencySeconds} for ${LoadBalancerAlarmEvaluationPeriods} period(s) of ${LoadBalancerAlarmEvaluationPeriodSeconds} seconds
+      TreatMissingData: notBreaching
+      AlarmActions:
+      - !Ref LoadBalancerAlarmTopic
+      Namespace: AWS/ApplicationELB
+      MetricName: TargetResponseTime
+      ComparisonOperator: GreaterThanOrEqualToThreshold
+      Unit: Seconds
+      Statistic: Average
+      EvaluationPeriods: !Ref LoadBalancerAlarmEvaluationPeriods
+      Period: !Ref LoadBalancerAlarmEvaluationPeriodSeconds
+      Threshold: !Ref LoadBalancerLatencySeconds
+      Dimensions:
+      - Name: LoadBalancer
+        Value: !GetAtt ApplicationLoadBalancer.LoadBalancerFullName
+    DependsOn: ApplicationLoadBalancer
+
+  LoadBalancerAlarmTopic:
+    Type: AWS::SNS::Topic
+    Condition: IsLBAlarmEnabled
+    Properties:
+      DisplayName: LoadBalancer Alarm Topic           
 
 Outputs:
 
@@ -774,3 +833,15 @@ Outputs:
     Export:
       Name: !Sub ${AWS::StackName}-ApplicationLoadBalancerName
 
+  LoadBalancerAlarmTopicArn:
+    Description: LoadBalancer Alarm Topic ARN
+    Value: !Ref LoadBalancerAlarmTopic
+    Export:
+      Name: !Sub ${AWS::StackName}-LoadBalancerAlarmTopicArn
+
+  LoadBalancerAlarmTopicName:
+    Description: LoadBalancer Alarm Topic Name
+    Value: !GetAtt LoadBalancerAlarmTopic.TopicName
+    Export:
+      Name: !Sub ${AWS::StackName}-LoadBalancerAlarmTopicName    
+

vpc-bastion-fargate-rds.cfn.yml

@@ -81,6 +81,36 @@ Parameters:
     AllowedPattern: "(^$|^((?!-)[A-Za-z0-9-]{1,63}(?<!-)\\.)+[A-Za-z]{2,6}$)" # Allow for a blank or a domain name
     ConstraintDescription: Please enter a valid domain name
 
+  LoadBalancerAlarmEvaluationPeriods:
+    Description: The number of periods over which data is compared to the threshold
+    Type: Number
+    Default: 2
+    MinValue: 2
+    ConstraintDescription: Must be at least one
+
+  LoadBalancerAlarmEvaluationPeriodSeconds:
+    Description: The time over which the specified statistic is applied. Specify time in seconds, in multiples of 60
+    Type: Number
+    Default: 300
+    MinValue: 60
+    ConstraintDescription: Must be at least 60 seconds
+
+  LoadBalancerLatencySeconds:
+    Description: LoadBalancer latency threshold, in seconds
+    Type: Number
+    Default: 1
+    MinValue: 1
+    ConstraintDescription: Must be atleast one
+
+  EnableLBAlarm:
+    Description: Set to true to enable load balancer latency alarm
+    Type: String
+    ConstraintDescription: Value must be true or false
+    Default: false
+    AllowedValues:
+      - true
+      - false
+
   AppProtocol:
     Type: String
     Description: The application server protocol
@@ -422,6 +452,10 @@ Metadata:
           - HostedZoneName
           - LoadBalancerDomainName
           - SSLCertificateArn
+          - EnableLBAlarm
+          - LoadBalancerLatencySeconds
+          - LoadBalancerAlarmEvaluationPeriodSeconds
+          - LoadBalancerAlarmEvaluationPeriods
       - Label:
           default: Initial Service CI/CD
         Parameters:
@@ -529,7 +563,14 @@ Metadata:
         default: Max Swap Use
       DatabaseEnableAlarms:
         default: Enable Alarms
-
+      EnableLBAlarm:
+        default: Enable LB Alarm
+      LoadBalancerAlarmEvaluationPeriods:
+        default: LB Alarm Periods
+      LoadBalancerAlarmEvaluationPeriodSeconds:
+        default: LB Alarm Seconds
+      LoadBalancerLatencySeconds:
+        default: LB Latency Threshold
 
 Conditions:
 
@@ -641,6 +682,10 @@ Resources:
         MaxTaggedContainerImagesToRetain: !Ref MaxTaggedContainerImagesToRetain
         DaysToRetainUntaggedContainerImages: !Ref DaysToRetainUntaggedContainerImages
         EnvironmentName: !Ref EnvironmentName
+        EnableLBAlarm: !Ref EnableLBAlarm
+        LoadBalancerLatencySeconds: !Ref LoadBalancerLatencySeconds
+        LoadBalancerAlarmEvaluationPeriodSeconds: !Ref LoadBalancerAlarmEvaluationPeriodSeconds
+        LoadBalancerAlarmEvaluationPeriods: !Ref LoadBalancerAlarmEvaluationPeriods
 
 Outputs:
 

vpc-bastion-fargate.cfn.yml

@@ -208,6 +208,35 @@ Parameters:
       - prod
     ConstraintDescription: Specify either dev or prod
 
+  LoadBalancerAlarmEvaluationPeriods:
+    Description: The number of periods over which data is compared to the threshold
+    Type: Number
+    Default: 2
+    MinValue: 2
+    ConstraintDescription: Must be at least one
+
+  LoadBalancerAlarmEvaluationPeriodSeconds:
+    Description: The time over which the specified statistic is applied. Specify time in seconds, in multiples of 60
+    Type: Number
+    Default: 300
+    MinValue: 60
+    ConstraintDescription: Must be at least 60 seconds
+
+  LoadBalancerLatencySeconds:
+    Description: LoadBalancer latency threshold, in seconds
+    Type: Number
+    Default: 1
+    MinValue: 1
+    ConstraintDescription: Must be at least one
+
+  EnableLBAlarm:
+    Description: Set to true to enable load balancer latency alarm
+    Type: String
+    ConstraintDescription: Value must be true or false
+    Default: false
+    AllowedValues:
+      - true
+      - false
 
 Metadata:
   AWS::CloudFormation::Interface:
@@ -251,6 +280,10 @@ Metadata:
           - HostedZoneName
           - LoadBalancerDomainName
           - SSLCertificateArn
+          - EnableLBAlarm
+          - LoadBalancerLatencySeconds
+          - LoadBalancerAlarmEvaluationPeriodSeconds
+          - LoadBalancerAlarmEvaluationPeriods
       - Label:
           default: Initial Service CI/CD
         Parameters:
@@ -326,6 +359,15 @@ Metadata:
         default: Initial Image
       CodeBuildDockerImage:
         default: CodeBuild Image
+      EnableLBAlarm:
+        default: Enable LB Alarm
+      LoadBalancerAlarmEvaluationPeriods:
+        default: LB Alarm Periods
+      LoadBalancerAlarmEvaluationPeriodSeconds:
+        default: LB Alarm Seconds
+      LoadBalancerLatencySeconds:
+        default: LB Latency Threshold
+
 
 
 Conditions:
@@ -385,6 +427,10 @@ Resources:
         MaxTaggedContainerImagesToRetain: !Ref MaxTaggedContainerImagesToRetain
         DaysToRetainUntaggedContainerImages: !Ref DaysToRetainUntaggedContainerImages
         EnvironmentName: !Ref EnvironmentName
+        EnableLBAlarm: !Ref EnableLBAlarm
+        LoadBalancerLatencySeconds: !Ref LoadBalancerLatencySeconds
+        LoadBalancerAlarmEvaluationPeriodSeconds: !Ref LoadBalancerAlarmEvaluationPeriodSeconds
+        LoadBalancerAlarmEvaluationPeriods: !Ref LoadBalancerAlarmEvaluationPeriods
     DependsOn: VpcStack