Example usage for com.amazonaws.services.autoscaling.model DetachInstancesRequest setShouldDecrementDesiredCapacity

Introduction

In this page you can find the example usage for com.amazonaws.services.autoscaling.model DetachInstancesRequest setShouldDecrementDesiredCapacity.

Prototype

public void setShouldDecrementDesiredCapacity(Boolean shouldDecrementDesiredCapacity) 

Source Link

Document

Indicates whether the Auto Scaling group decrements the desired capacity value by the number of instances detached.

Usage

From source file:com.pinterest.arcee.autoscaling.AwsAutoScaleGroupManager.java

License:Apache License

@Override
public void deleteAutoScalingGroup(String groupName, boolean detachInstances) throws Exception {
    // step 1: get the auto scaling instances information
    if (detachInstances) {
        DescribeAutoScalingGroupsRequest request = new DescribeAutoScalingGroupsRequest();
        request.setAutoScalingGroupNames(Arrays.asList(groupName));
        DescribeAutoScalingGroupsResult result = aasClient.describeAutoScalingGroups(request);
        List<AutoScalingGroup> groups = result.getAutoScalingGroups();
        if (groups.isEmpty()) {
            return;
        }/*from w w w  .  j av  a 2s.c om*/
        AutoScalingGroup group = groups.get(0);

        List<Instance> instances = group.getInstances();
        List<String> ids = new LinkedList<>();
        for (Instance instance : instances) {
            ids.add(instance.getInstanceId());
        }

        // step 2: update the autoscaling min size to 0
        UpdateAutoScalingGroupRequest updateAutoScalingGroupRequest = new UpdateAutoScalingGroupRequest();
        updateAutoScalingGroupRequest.setAutoScalingGroupName(groupName);
        updateAutoScalingGroupRequest.setMinSize(0);
        aasClient.updateAutoScalingGroup(updateAutoScalingGroupRequest);

        // step 3: detach instances from auto scaling group
        if (!ids.isEmpty()) {
            for (int i = 0; i < ids.size(); i += MAX_DETACH_INSTANCE_LENGTH) {
                DetachInstancesRequest detachInstancesRequest = new DetachInstancesRequest();
                detachInstancesRequest.setAutoScalingGroupName(groupName);
                detachInstancesRequest.setShouldDecrementDesiredCapacity(true);
                detachInstancesRequest
                        .setInstanceIds(ids.subList(i, Math.min(i + MAX_DETACH_INSTANCE_LENGTH, ids.size())));
                aasClient.detachInstances(detachInstancesRequest);
            }
        }
    }

    // step 4 delete auto scaling group
    DeleteAutoScalingGroupRequest deleteAutoScalingGroupRequest = new DeleteAutoScalingGroupRequest();
    deleteAutoScalingGroupRequest.setAutoScalingGroupName(groupName);
    deleteAutoScalingGroupRequest.setForceDelete(true);
    aasClient.deleteAutoScalingGroup(deleteAutoScalingGroupRequest);
}

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From source file:com.pinterest.arcee.autoscaling.AwsAutoScaleGroupManager.java

License:Apache License

@Override
public void detachInstancesFromAutoScalingGroup(Collection<String> instances, String groupName,
        boolean decreaseSize) throws Exception {
    DescribeAutoScalingGroupsRequest request = new DescribeAutoScalingGroupsRequest();
    request.setAutoScalingGroupNames(Arrays.asList(groupName));
    DescribeAutoScalingGroupsResult result = aasClient.describeAutoScalingGroups(request);
    List<AutoScalingGroup> groups = result.getAutoScalingGroups();
    if (groups.isEmpty()) {
        return;/* w ww  .j a v  a 2 s  . c  o  m*/
    }

    AutoScalingGroup group = groups.get(0);
    int curCapacity = group.getDesiredCapacity();
    int minSize = group.getMinSize();
    if (decreaseSize && (curCapacity == minSize)) {
        UpdateAutoScalingGroupRequest updateRequest = new UpdateAutoScalingGroupRequest();
        updateRequest.setAutoScalingGroupName(groupName);
        updateRequest.setMinSize(minSize - 1);
        aasClient.updateAutoScalingGroup(updateRequest);
    }

    DetachInstancesRequest detachInstancesRequest = new DetachInstancesRequest();
    detachInstancesRequest.withAutoScalingGroupName(groupName).setInstanceIds(instances);
    detachInstancesRequest.setShouldDecrementDesiredCapacity(decreaseSize);
    aasClient.detachInstances(detachInstancesRequest);
}

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From source file:com.pinterest.arcee.autoscaling.AwsAutoScalingManager.java

License:Apache License

@Override
public void deleteAutoScalingGroup(String groupName, boolean detachInstances) throws Exception {
    // step 1: get the auto scaling instances information
    if (detachInstances) {
        DescribeAutoScalingGroupsRequest request = new DescribeAutoScalingGroupsRequest();
        request.setAutoScalingGroupNames(Arrays.asList(groupName));
        DescribeAutoScalingGroupsResult result = aasClient.describeAutoScalingGroups(request);
        List<AutoScalingGroup> groups = result.getAutoScalingGroups();
        if (groups.isEmpty()) {
            return;
        }//w w  w  .ja  v  a2  s. c  o  m
        AutoScalingGroup group = groups.get(0);
        List<Instance> instances = group.getInstances();
        List<String> ids = new ArrayList<>();
        for (Instance instance : instances) {
            ids.add(instance.getInstanceId());
        }

        // step 2: update the autoscaling min size to 0
        UpdateAutoScalingGroupRequest updateAutoScalingGroupRequest = new UpdateAutoScalingGroupRequest();
        updateAutoScalingGroupRequest.setAutoScalingGroupName(groupName);
        updateAutoScalingGroupRequest.setMinSize(0);
        aasClient.updateAutoScalingGroup(updateAutoScalingGroupRequest);

        // step 3: detach instances from auto scaling group
        if (!ids.isEmpty()) {
            for (int i = 0; i < ids.size(); i += MAX_DETACH_INSTANCE_LENGTH) {
                DetachInstancesRequest detachInstancesRequest = new DetachInstancesRequest();
                detachInstancesRequest.setAutoScalingGroupName(groupName);
                detachInstancesRequest.setShouldDecrementDesiredCapacity(true);
                detachInstancesRequest
                        .setInstanceIds(ids.subList(i, Math.min(i + MAX_DETACH_INSTANCE_LENGTH, ids.size())));
                aasClient.detachInstances(detachInstancesRequest);
            }
        }
    }

    // step 4 delete auto scaling group
    DeleteAutoScalingGroupRequest deleteAutoScalingGroupRequest = new DeleteAutoScalingGroupRequest();
    deleteAutoScalingGroupRequest.setAutoScalingGroupName(groupName);
    deleteAutoScalingGroupRequest.setForceDelete(true);
    aasClient.deleteAutoScalingGroup(deleteAutoScalingGroupRequest);
}

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From source file:com.pinterest.arcee.autoscaling.AwsAutoScalingManager.java

License:Apache License

@Override
public void detachInstancesFromAutoScalingGroup(Collection<String> instances, String groupName,
        boolean decreaseSize) throws Exception {
    DescribeAutoScalingGroupsRequest request = new DescribeAutoScalingGroupsRequest();
    request.setAutoScalingGroupNames(Collections.singletonList(groupName));
    DescribeAutoScalingGroupsResult result = aasClient.describeAutoScalingGroups(request);
    List<AutoScalingGroup> groups = result.getAutoScalingGroups();
    if (groups.isEmpty()) {
        return;/*from   w  ww . jav a2 s . com*/
    }

    AutoScalingGroup group = groups.get(0);
    int curCapacity = group.getDesiredCapacity();
    int minSize = group.getMinSize();
    if (decreaseSize && (curCapacity == minSize)) {
        UpdateAutoScalingGroupRequest updateRequest = new UpdateAutoScalingGroupRequest();
        updateRequest.setAutoScalingGroupName(groupName);
        updateRequest.setMinSize(minSize - 1);
        aasClient.updateAutoScalingGroup(updateRequest);
    }

    DetachInstancesRequest detachInstancesRequest = new DetachInstancesRequest();
    detachInstancesRequest.withAutoScalingGroupName(groupName).setInstanceIds(instances);
    detachInstancesRequest.setShouldDecrementDesiredCapacity(decreaseSize);
    aasClient.detachInstances(detachInstancesRequest);
}

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