chore(pulumi/aws): add snippet to autoscale an ecs service

snippets/pulumi/aws/autoscale ecs services.ts

@@ -0,0 +1,81 @@
+import * as pulumi from '@pulumi/pulumi';
+import * as aws from '@pulumi/aws';
+
+const cluster: pulumi.Output<aws.ecs.GetClusterResult> = aws.ecs.getClusterOutput({ clusterName: 'devel' });
+const service: pulumi.Output<aws.ecs.GetServiceResult> = aws.ecs.getServiceOutput({
+    clusterArn: cluster.arn,
+    serviceName: 'someService',
+});
+const targetGroup = aws.alb.getTargetGroupOutput({
+    arn: service.loadBalancers.apply(albs => albs![0].targetGroupArn!),
+});
+const loadBalancer = aws.alb.getLoadBalancerOutput({ arn: targetGroup.loadBalancerArns[0] });
+
+const autoscalingTarget = new aws.appautoscaling.Target(
+    `${service.serviceName}`,
+    {
+        resourceId: pulumi.interpolate `service/${cluster.clusterName}/${service.name}`,
+        serviceNamespace: 'ecs',
+        scalableDimension: 'ecs:service:DesiredCount',
+        minCapacity: 1,
+        maxCapacity: 3,
+    },
+);
+new aws.appautoscaling.Policy(
+    `${service.serviceName}-averageCpuUtilization`,
+    {
+        name: 'Scale on Average CPU Utilization',
+        policyType: "TargetTrackingScaling",
+
+        resourceId: autoscalingTarget.resourceId,
+        serviceNamespace: autoscalingTarget.serviceNamespace,
+        scalableDimension: autoscalingTarget.scalableDimension,
+        targetTrackingScalingPolicyConfiguration: {
+            predefinedMetricSpecification: {
+                predefinedMetricType: "ECSServiceAverageCPUUtilization",
+            },
+            targetValue: 75.0,
+            scaleInCooldown: 60,
+            scaleOutCooldown: 60,
+        },
+    },
+);
+new aws.appautoscaling.Policy(
+    `${service.serviceName}-averageMemoryUtilization`,
+    {
+        name: 'Scale on Average Memory Utilization',
+        policyType: "TargetTrackingScaling",
+
+        resourceId: autoscalingTarget.resourceId,
+        serviceNamespace: autoscalingTarget.serviceNamespace,
+        scalableDimension: autoscalingTarget.scalableDimension,
+        targetTrackingScalingPolicyConfiguration: {
+            predefinedMetricSpecification: {
+                predefinedMetricType: "ECSServiceAverageMemoryUtilization",
+            },
+            targetValue: 75.0,
+            scaleInCooldown: 60,
+            scaleOutCooldown: 60,
+        },
+    },
+);
+new aws.appautoscaling.Policy(
+    `${service.serviceName}-albRequestCountPerTarget`,
+    {
+        name: 'Scale on ALB Request Count',
+        policyType: "TargetTrackingScaling",
+
+        resourceId: autoscalingTarget.resourceId,
+        serviceNamespace: autoscalingTarget.serviceNamespace,
+        scalableDimension: autoscalingTarget.scalableDimension,
+        targetTrackingScalingPolicyConfiguration: {
+            predefinedMetricSpecification: {
+                predefinedMetricType: "ALBRequestCountPerTarget",
+                resourceLabel: pulumi.interpolate `${loadBalancer.arnSuffix}/${targetGroup.arnSuffix}`,
+            },
+            targetValue: 12.0,
+            scaleInCooldown: 60,
+            scaleOutCooldown: 60,
+        },
+    },
+);