Example usage for com.amazonaws.services.autoscaling AmazonAutoScalingClient describeAutoScalingInstances

Introduction

In this page you can find the example usage for com.amazonaws.services.autoscaling AmazonAutoScalingClient describeAutoScalingInstances.

Prototype

@Override
    public DescribeAutoScalingInstancesResult describeAutoScalingInstances() 

Source Link

Usage

From source file:de.tuhrig.deployman.launch.Launcher.java

/**
 * Starts a auto scaling launch configuration. This method is a little but complicated, since the
 * process to start a auto scaling configuration involves some steps: - create a launch
 * configuration which defines the machines to start - create an auto scaling definition which
 * defines how many machines should be started if something happens. - create an auto scaling
 * policy to which we add a metric - create the metric which is checked by the auto scaling -
 * print the starting instances/*w  ww.j ava2s.  c om*/
 */
private List<Instance> runAutoScalingLaunch(Formation formation) {
    this.console.write("Run auto scaling...");

    Machine machine = formation.getMachine();
    Scaling scaling = machine.getScaling();

    AmazonAutoScalingClient autoScaling = new AutoScaling().getClient();

    try {
        CreateLaunchConfigurationRequest request = createLaunchConfigurationRequest(formation);
        autoScaling.createLaunchConfiguration(request);
        this.console.write("Created launch configuration " + scaling.getName());
    } catch (AlreadyExistsException e) {
        this.console.write("Launch configuration " + scaling.getName() + " already exists"); //$NON-NLS-2$
    }

    //
    //
    //

    try {
        CreateAutoScalingGroupRequest request = createAutoScalingRequest(scaling);
        autoScaling.createAutoScalingGroup(request);
        this.console.write("Created auto scaling group " + scaling.getGroup());
    } catch (AlreadyExistsException e) {
        this.console.write("Auto scaling group " + scaling.getGroup() + " already exists"); //$NON-NLS-2$
    }

    //
    //
    //

    PutScalingPolicyRequest request = new PutScalingPolicyRequest().withAutoScalingGroupName(scaling.getGroup())
            .withPolicyName(scaling.getPolicy()).withScalingAdjustment(1)
            .withAdjustmentType("ChangeInCapacity");

    PutScalingPolicyResult result = autoScaling.putScalingPolicy(request);

    this.console.write("Put scaling policy " + scaling.getPolicy());

    //
    //
    //

    // Scale Up

    Dimension dimension = new Dimension().withName("AutoScalingGroupName").withValue(scaling.getGroup());

    List<String> actions = new ArrayList<>();
    actions.add(result.getPolicyARN());

    PutMetricAlarmRequest upRequest = new PutMetricAlarmRequest().withAlarmName(scaling.getAlarm())
            .withMetricName("CPUUtilization").withDimensions(dimension).withNamespace("AWS/EC2")
            .withComparisonOperator(ComparisonOperator.GreaterThanThreshold).withStatistic(Statistic.Average)
            .withUnit(StandardUnit.Percent).withThreshold(60d).withPeriod(300).withEvaluationPeriods(2)
            .withAlarmActions(actions);

    AmazonCloudWatchClient cloudWatch = new CloudWatch().getClient();
    cloudWatch.putMetricAlarm(upRequest);

    this.console.write("Put alarm " + scaling.getAlarm());
    this.console.newLine();

    List<Instance> instances = new ArrayList<>();

    for (AutoScalingInstanceDetails instance : autoScaling.describeAutoScalingInstances()
            .getAutoScalingInstances()) {

        if (instance.getAutoScalingGroupName().equals(scaling.getGroup())) {

            instances.add(new Ec2().getEC2InstanceById(instance.getInstanceId()));
        }
    }

    return instances;
}

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