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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,7 +1,8 @@ | ||
| { | ||
| "packages": [ | ||
| "serverless-plugin", | ||
| "serverless-test-project" | ||
| "serverless-test-project", | ||
| "serverless-test-project-alb" | ||
| ], | ||
| "version": "1.3.0" | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,193 @@ | ||
| 'use strict' | ||
|
|
||
| const { makeResourceName, getStatisticName, findLoadBalancersForTargetGroup } = require('./util') | ||
|
|
||
| /** | ||
| * @param {object} albTargetAlarmConfig The fully resolved alarm configuration | ||
| */ | ||
| module.exports = function ALBTargetAlarms (albTargetAlarmConfig, context) { | ||
| return { | ||
| createALBTargetAlarms | ||
| } | ||
|
|
||
| /** | ||
| * Add all required Application Load Balancer alarms for Target Group to the provided CloudFormation template | ||
| * based on the resources found within | ||
| * | ||
| * @param {CloudFormationTemplate} cfTemplate A CloudFormation template object | ||
| */ | ||
| function createALBTargetAlarms (cfTemplate) { | ||
| const targetGroupResources = cfTemplate.getResourcesByType( | ||
| 'AWS::ElasticLoadBalancingV2::TargetGroup' | ||
| ) | ||
| for (const [targetGroupResourceName, targetGroupResource] of Object.entries(targetGroupResources)) { | ||
| for (const tgLogicalId of Object.keys(targetGroupResources)) { | ||
| const loadBalancerLogicalIds = findLoadBalancersForTargetGroup(tgLogicalId, cfTemplate) | ||
| for (const loadBalancerLogicalId of loadBalancerLogicalIds) { | ||
| // const loadBalancerFullName = resolveLoadBalancerFullNameForSub(loadBalancerLogicalId) | ||
| if (albTargetAlarmConfig.HTTPCode_Target_5XX_Count && albTargetAlarmConfig.HTTPCode_Target_5XX_Count.enabled) { | ||
| const httpCodeTarget5XXCount = createHTTPCodeTarget5XXCountAlarm( | ||
| targetGroupResourceName, | ||
| targetGroupResource, | ||
| loadBalancerLogicalId, | ||
| albTargetAlarmConfig.HTTPCode_Target_5XX_Count | ||
| ) | ||
| cfTemplate.addResource(httpCodeTarget5XXCount.resourceName, httpCodeTarget5XXCount.resource) | ||
| } | ||
| if (albTargetAlarmConfig.UnHealthyHostCount && albTargetAlarmConfig.UnHealthyHostCount.enabled) { | ||
| const unHealthyHostCount = createUnHealthyHostCountAlarm( | ||
| targetGroupResourceName, | ||
| targetGroupResource, | ||
| loadBalancerLogicalId, | ||
| albTargetAlarmConfig.UnHealthyHostCount | ||
| ) | ||
| cfTemplate.addResource(unHealthyHostCount.resourceName, unHealthyHostCount.resource) | ||
| } | ||
| if (albTargetAlarmConfig.LambdaInternalError && albTargetAlarmConfig.LambdaInternalError.enabled) { | ||
| const lambdaInternalError = createLambdaInternalErrorAlarm( | ||
| targetGroupResourceName, | ||
| targetGroupResource, | ||
| loadBalancerLogicalId, | ||
| albTargetAlarmConfig.LambdaInternalError | ||
| ) | ||
| cfTemplate.addResource(lambdaInternalError.resourceName, lambdaInternalError.resource) | ||
| } | ||
| if (albTargetAlarmConfig.LambdaUserError && albTargetAlarmConfig.LambdaUserError.enabled) { | ||
| const lambdaUserError = createLambdaUserErrorAlarm( | ||
| targetGroupResourceName, | ||
| targetGroupResource, | ||
| loadBalancerLogicalId, | ||
| albTargetAlarmConfig.LambdaUserError | ||
| ) | ||
| cfTemplate.addResource(lambdaUserError.resourceName, lambdaUserError.resource) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function createLoadBalancerTargetAlarm ( | ||
| alarmName, | ||
| alarmDescription, | ||
| targetGroupResourceName, // Logical ID of the CloudFormation Target Group Resource | ||
| loadBalancerLogicalId, | ||
| comparisonOperator, | ||
| threshold, | ||
| metricName, | ||
| statistic, | ||
| period, | ||
| extendedStatistic, | ||
| evaluationPeriods, | ||
| treatMissingData | ||
| ) { | ||
| const targetGroupFullName = { 'Fn::GetAtt': [targetGroupResourceName, 'TargetGroupFullName'] } | ||
| const loadBalancerFullName = { 'Fn::GetAtt': [loadBalancerLogicalId, 'LoadBalancerFullName'] } | ||
| const metricProperties = { | ||
| Dimensions: [{ Name: 'TargetGroup', Value: targetGroupFullName }, { Name: 'LoadBalancer', Value: loadBalancerFullName }], | ||
| MetricName: metricName, | ||
| Namespace: 'AWS/ApplicationELB', | ||
| Period: period, | ||
| Statistic: statistic, | ||
| ExtendedStatistic: extendedStatistic | ||
| } | ||
|
|
||
| return { | ||
| Type: 'AWS::CloudWatch::Alarm', | ||
| Properties: { | ||
| ActionsEnabled: true, | ||
| AlarmActions: context.alarmActions, | ||
| AlarmName: alarmName, | ||
| AlarmDescription: alarmDescription, | ||
| EvaluationPeriods: evaluationPeriods, | ||
| ComparisonOperator: comparisonOperator, | ||
| Threshold: threshold, | ||
| TreatMissingData: treatMissingData, | ||
| ...metricProperties | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function createHTTPCodeTarget5XXCountAlarm (targetGroupResourceName, targetGroupResource, loadBalancerLogicalID, config) { | ||
| const threshold = config.Threshold | ||
| return { | ||
| resourceName: makeResourceName('LoadBalancer', targetGroupResourceName, 'HTTPCodeTarget5XXCount'), | ||
| resource: createLoadBalancerTargetAlarm( | ||
| `LoadBalancerHTTPCodeTarget5XXCountAlarm_${targetGroupResourceName}`, | ||
| `LoadBalancer HTTP Code Target 5XX Count ${getStatisticName(config)} for ${targetGroupResourceName} breaches ${threshold}`, | ||
| targetGroupResourceName, | ||
| loadBalancerLogicalID, | ||
| config.ComparisonOperator, | ||
| threshold, | ||
| 'HTTPCode_Target_5XX_Count', | ||
| config.Statistic, | ||
| config.Period, | ||
| config.ExtendedStatistic, | ||
| config.EvaluationPeriods, | ||
| config.TreatMissingData | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| function createUnHealthyHostCountAlarm (targetGroupResourceName, targetGroupResource, loadBalancerLogicalID, config) { | ||
| const threshold = config.Threshold | ||
| return { | ||
| resourceName: makeResourceName('LoadBalancer', targetGroupResourceName, 'UnHealthyHostCount'), | ||
| resource: createLoadBalancerTargetAlarm( | ||
| `LoadBalancerUnHealthyHostCountAlarm_${targetGroupResourceName}`, | ||
| `LoadBalancer UnHealthy Host Count ${getStatisticName(config)} for ${targetGroupResourceName} breaches ${threshold}`, | ||
| targetGroupResourceName, | ||
| loadBalancerLogicalID, | ||
| config.ComparisonOperator, | ||
| threshold, | ||
| 'UnHealthyHostCount', | ||
| config.Statistic, | ||
| config.Period, | ||
| config.ExtendedStatistic, | ||
| config.EvaluationPeriods, | ||
| config.TreatMissingData | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| function createLambdaInternalErrorAlarm (targetGroupResourceName, targetGroupResource, loadBalancerLogicalID, config) { | ||
| const threshold = config.Threshold | ||
| return { | ||
| resourceName: makeResourceName('LoadBalancer', targetGroupResourceName, 'LambdaInternalError'), | ||
| resource: createLoadBalancerTargetAlarm( | ||
| `LoadBalancerLambdaInternalErrorAlarm_${targetGroupResourceName}`, | ||
| `LoadBalancer Lambda Internal Error ${getStatisticName(config)} for ${targetGroupResourceName} breaches ${threshold}`, | ||
| targetGroupResourceName, | ||
| loadBalancerLogicalID, | ||
| config.ComparisonOperator, | ||
| threshold, | ||
| 'LambdaInternalError', | ||
| config.Statistic, | ||
| config.Period, | ||
| config.ExtendedStatistic, | ||
| config.EvaluationPeriods, | ||
| config.TreatMissingData | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| function createLambdaUserErrorAlarm (targetGroupResourceName, targetGroupResource, loadBalancerLogicalID, config) { | ||
| const threshold = config.Threshold | ||
| return { | ||
| resourceName: makeResourceName('LoadBalancer', targetGroupResourceName, 'LambdaUserError'), | ||
| resource: createLoadBalancerTargetAlarm( | ||
| `LoadBalancerLambdaUserErrorAlarm_${targetGroupResourceName}`, | ||
| `LoadBalancer Lambda User Error ${getStatisticName(config)} for ${targetGroupResourceName} breaches ${threshold}`, | ||
| targetGroupResourceName, | ||
| loadBalancerLogicalID, | ||
| config.ComparisonOperator, | ||
| threshold, | ||
| 'LambdaUserError', | ||
| config.Statistic, | ||
| config.Period, | ||
| config.ExtendedStatistic, | ||
| config.EvaluationPeriods, | ||
| config.TreatMissingData | ||
| ) | ||
| } | ||
| } | ||
| } |
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