private static void setupPolicy(
AmazonAutoScalingClient autoScale, AmazonCloudWatchClient cloudWatch) {
PutScalingPolicyRequest policyReq = new PutScalingPolicyRequest();
policyReq.setPolicyName("On Demand Scale Up Policy");
policyReq.setAutoScalingGroupName("OnDemand ASGroup");
policyReq.setAdjustmentType("ChangeInCapacity");
policyReq.setCooldown(60);
policyReq.setScalingAdjustment(1);
PutScalingPolicyResult arn_up = autoScale.putScalingPolicy(policyReq);
PutMetricAlarmRequest putMetricAlarmRequest = new PutMetricAlarmRequest();
putMetricAlarmRequest.setMetricName("HighCPUAlarm");
putMetricAlarmRequest.setComparisonOperator("GreaterThanOrEqualToThreshold");
putMetricAlarmRequest.setEvaluationPeriods(1);
putMetricAlarmRequest.setMetricName("CPUUtilization");
putMetricAlarmRequest.setNamespace("AWS/EC2");
putMetricAlarmRequest.setPeriod(120);
putMetricAlarmRequest.setStatistic("Average");
putMetricAlarmRequest.setThreshold(50.0);
List<String> arnList = new ArrayList<String>();
arnList.add(arn_up.getPolicyARN());
putMetricAlarmRequest.setAlarmActions(arnList);
putMetricAlarmRequest.setAlarmName("On Demand Alarm Up");
cloudWatch.putMetricAlarm(putMetricAlarmRequest);
policyReq = new PutScalingPolicyRequest();
policyReq.setPolicyName("On Demand Scale Down Policy");
policyReq.setAutoScalingGroupName("OnDemand ASGroup");
policyReq.setAdjustmentType("ChangeInCapacity");
policyReq.setCooldown(60);
policyReq.setScalingAdjustment(-1);
PutScalingPolicyResult arn_down = autoScale.putScalingPolicy(policyReq);
putMetricAlarmRequest = new PutMetricAlarmRequest();
putMetricAlarmRequest.setMetricName("LowCPUAlarm");
putMetricAlarmRequest.setComparisonOperator("LessThanOrEqualToThreshold");
putMetricAlarmRequest.setEvaluationPeriods(1);
putMetricAlarmRequest.setMetricName("CPUUtilization");
putMetricAlarmRequest.setNamespace("AWS/EC2");
putMetricAlarmRequest.setPeriod(120);
putMetricAlarmRequest.setStatistic("Average");
putMetricAlarmRequest.setThreshold(4.0);
List<String> arnList2 = new ArrayList<String>();
arnList2.add(arn_down.getPolicyARN());
putMetricAlarmRequest.setAlarmActions(arnList2);
putMetricAlarmRequest.setAlarmName("On Demand Alarm Down");
cloudWatch.putMetricAlarm(putMetricAlarmRequest);
System.out.println("Setup autoscaler to monitor average CPU Usage");
}
public String putScalingPolicy(
String autoScalingGroupName,
String policyName,
int scalingAdjustment,
String adjustmentType,
int cooldown) {
PutScalingPolicyRequest request = new PutScalingPolicyRequest();
request.setAutoScalingGroupName(autoScalingGroupName);
request.setAdjustmentType(adjustmentType);
request.setCooldown(cooldown);
request.setPolicyName(policyName);
request.setScalingAdjustment(scalingAdjustment);
PutScalingPolicyResult result = scalingClient.putScalingPolicy(request);
return result.getPolicyARN();
}