Examples for creating and managing Auto Scaling groups with the Amazon SDKs

    /// <summary>
    /// Create a new Amazon EC2 Auto Scaling group.
    /// </summary>
    /// <param name="groupName">The name to use for the new Auto Scaling
    /// group.</param>
    /// <param name="launchTemplateName">The name of the Amazon EC2 Auto Scaling
    /// launch template to use to create instances in the group.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> CreateAutoScalingGroupAsync(
        string groupName,
        string launchTemplateName,
        string availabilityZone)
    {
        var templateSpecification = new LaunchTemplateSpecification
        {
            LaunchTemplateName = launchTemplateName,
        };

        var zoneList = new List<string>
            {
                availabilityZone,
            };

        var request = new CreateAutoScalingGroupRequest
        {
            AutoScalingGroupName = groupName,
            AvailabilityZones = zoneList,
            LaunchTemplate = templateSpecification,
            MaxSize = 6,
            MinSize = 1
        };

        var response = await _amazonAutoScaling.CreateAutoScalingGroupAsync(request);
        Console.WriteLine($"{groupName} Auto Scaling Group created");
        return response.HttpStatusCode == System.Net.HttpStatusCode.OK;
    }

        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";

    Aws::AutoScaling::AutoScalingClient autoScalingClient(clientConfig);

        Aws::AutoScaling::Model::CreateAutoScalingGroupRequest request;
        request.SetAutoScalingGroupName(groupName);
        Aws::Vector<Aws::String> availabilityGroupZones;
        availabilityGroupZones.push_back(
                availabilityZones[availabilityZoneChoice - 1].GetZoneName());
        request.SetAvailabilityZones(availabilityGroupZones);
        request.SetMaxSize(1);
        request.SetMinSize(1);

        Aws::AutoScaling::Model::LaunchTemplateSpecification launchTemplateSpecification;
        launchTemplateSpecification.SetLaunchTemplateName(templateName);
        request.SetLaunchTemplate(launchTemplateSpecification);

        Aws::AutoScaling::Model::CreateAutoScalingGroupOutcome outcome =
                autoScalingClient.CreateAutoScalingGroup(request);

        if (outcome.IsSuccess()) {
            std::cout << "Created Auto Scaling group '" << groupName << "'..."
                      << std::endl;
        }
        else if (outcome.GetError().GetErrorType() ==
                 Aws::AutoScaling::AutoScalingErrors::ALREADY_EXISTS_FAULT) {
            std::cout << "Auto Scaling group '" << groupName << "' already exists."
                      << std::endl;
        }
        else {
            std::cerr << "Error with AutoScaling::CreateAutoScalingGroup. "
                      << outcome.GetError().GetMessage()
                      << std::endl;

        }

    public static void createAutoScalingGroup(AutoScalingClient autoScalingClient,
                                              String groupName,
                                              String launchTemplateName,
                                              String vpcZoneId) {

        try {
            AutoScalingWaiter waiter = autoScalingClient.waiter();
            LaunchTemplateSpecification templateSpecification = LaunchTemplateSpecification.builder()
                .launchTemplateName(launchTemplateName)
                .build();

            CreateAutoScalingGroupRequest request = CreateAutoScalingGroupRequest.builder()
                .autoScalingGroupName(groupName)
                .availabilityZones("us-east-1a")
                .launchTemplate(templateSpecification)
                .maxSize(1)
                .minSize(1)
                .vpcZoneIdentifier(vpcZoneId)
                .build();

            autoScalingClient.createAutoScalingGroup(request);
            DescribeAutoScalingGroupsRequest groupsRequest = DescribeAutoScalingGroupsRequest.builder()
                .autoScalingGroupNames(groupName)
                .build();

            WaiterResponse<DescribeAutoScalingGroupsResponse> waiterResponse = waiter.waitUntilGroupExists(groupsRequest);
            waiterResponse.matched().response().ifPresent(System.out::println);
            System.out.println("Auto Scaling Group created");

        } catch (AutoScalingException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

suspend fun createAutoScalingGroup(groupName: String, launchTemplateNameVal: String, serviceLinkedRoleARNVal: String, vpcZoneIdVal: String) {
    val templateSpecification = LaunchTemplateSpecification {
        launchTemplateName = launchTemplateNameVal
    }

    val request = CreateAutoScalingGroupRequest {
        autoScalingGroupName = groupName
        availabilityZones = listOf("us-east-1a")
        launchTemplate = templateSpecification
        maxSize = 1
        minSize = 1
        vpcZoneIdentifier = vpcZoneIdVal
        serviceLinkedRoleArn = serviceLinkedRoleARNVal
    }

    // This object is required for the waiter call.
    val groupsRequestWaiter = DescribeAutoScalingGroupsRequest {
        autoScalingGroupNames = listOf(groupName)
    }

    AutoScalingClient { region = "us-east-1" }.use { autoScalingClient ->
        autoScalingClient.createAutoScalingGroup(request)
        autoScalingClient.waitUntilGroupExists(groupsRequestWaiter)
        println("$groupName was created!")
    }
}

    public function createAutoScalingGroup(
        $autoScalingGroupName,
        $availabilityZones,
        $minSize,
        $maxSize,
        $launchTemplateId
    ) {
        return $this->autoScalingClient->createAutoScalingGroup([
            'AutoScalingGroupName' => $autoScalingGroupName,
            'AvailabilityZones' => $availabilityZones,
            'MinSize' => $minSize,
            'MaxSize' => $maxSize,
            'LaunchTemplate' => [
                'LaunchTemplateId' => $launchTemplateId,
            ],
        ]);
    }

class AutoScalingWrapper:
    """Encapsulates Amazon EC2 Auto Scaling actions."""

    def __init__(self, autoscaling_client):
        """
        :param autoscaling_client: A Boto3 Amazon EC2 Auto Scaling client.
        """
        self.autoscaling_client = autoscaling_client


    def create_group(
        self, group_name, group_zones, launch_template_name, min_size, max_size
    ):
        """
        Creates an Auto Scaling group.

        :param group_name: The name to give to the group.
        :param group_zones: The Availability Zones in which instances can be created.
        :param launch_template_name: The name of an existing Amazon EC2 launch template.
                                     The launch template specifies the configuration of
                                     instances that are created by auto scaling activities.
        :param min_size: The minimum number of active instances in the group.
        :param max_size: The maximum number of active instances in the group.
        """
        try:
            self.autoscaling_client.create_auto_scaling_group(
                AutoScalingGroupName=group_name,
                AvailabilityZones=group_zones,
                LaunchTemplate={
                    "LaunchTemplateName": launch_template_name,
                    "Version": "$Default",
                },
                MinSize=min_size,
                MaxSize=max_size,
            )
        except ClientError as err:
            logger.error(
                "Couldn't create group %s. Here's why: %s: %s",
                group_name,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise

async fn create_group(client: &Client, name: &str, id: &str) -> Result<(), Error> {
    client
        .create_auto_scaling_group()
        .auto_scaling_group_name(name)
        .instance_id(id)
        .min_size(1)
        .max_size(5)
        .send()
        .await?;

    println!("Created AutoScaling group");

    Ok(())
}

    /// <summary>
    /// Update the capacity of an Auto Scaling group.
    /// </summary>
    /// <param name="groupName">The name of the Auto Scaling group.</param>
    /// <param name="launchTemplateName">The name of the EC2 launch template.</param>
    /// <param name="maxSize">The maximum number of instances that can be
    /// created for the Auto Scaling group.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> UpdateAutoScalingGroupAsync(
        string groupName,
        string launchTemplateName,
        int maxSize)
    {
        var templateSpecification = new LaunchTemplateSpecification
        {
            LaunchTemplateName = launchTemplateName,
        };

        var groupRequest = new UpdateAutoScalingGroupRequest
        {
            MaxSize = maxSize,
            AutoScalingGroupName = groupName,
            LaunchTemplate = templateSpecification,
        };

        var response = await _amazonAutoScaling.UpdateAutoScalingGroupAsync(groupRequest);
        if (response.HttpStatusCode == System.Net.HttpStatusCode.OK)
        {
            Console.WriteLine($"You successfully updated the Auto Scaling group {groupName}.");
            return true;
        }
        else
        {
            return false;
        }
    }

        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";

    Aws::AutoScaling::AutoScalingClient autoScalingClient(clientConfig);

        Aws::AutoScaling::Model::UpdateAutoScalingGroupRequest request;
        request.SetAutoScalingGroupName(groupName);
        request.SetMaxSize(3);

        Aws::AutoScaling::Model::UpdateAutoScalingGroupOutcome outcome =
                autoScalingClient.UpdateAutoScalingGroup(request);

        if (!outcome.IsSuccess()) {
            std::cerr << "Error with AutoScaling::UpdateAutoScalingGroup. "
                      << outcome.GetError().GetMessage()
                      << std::endl;

        }

    public static void updateAutoScalingGroup(AutoScalingClient autoScalingClient, String groupName, String launchTemplateName) {
        try {
            AutoScalingWaiter waiter = autoScalingClient.waiter();
            LaunchTemplateSpecification templateSpecification = LaunchTemplateSpecification.builder()
                .launchTemplateName(launchTemplateName)
                .build();

            UpdateAutoScalingGroupRequest groupRequest = UpdateAutoScalingGroupRequest.builder()
                .maxSize(3)
                .autoScalingGroupName(groupName)
                .launchTemplate(templateSpecification)
                .build();

            autoScalingClient.updateAutoScalingGroup(groupRequest);
            DescribeAutoScalingGroupsRequest groupsRequest = DescribeAutoScalingGroupsRequest.builder()
                .autoScalingGroupNames(groupName)
                .build();

            WaiterResponse<DescribeAutoScalingGroupsResponse> waiterResponse = waiter.waitUntilGroupInService(groupsRequest);
            waiterResponse.matched().response().ifPresent(System.out::println);
            System.out.println("You successfully updated the auto scaling group  "+groupName);

        } catch (AutoScalingException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

suspend fun updateAutoScalingGroup(groupName: String, launchTemplateNameVal: String, serviceLinkedRoleARNVal: String) {
    val templateSpecification = LaunchTemplateSpecification {
        launchTemplateName = launchTemplateNameVal
    }

    val groupRequest = UpdateAutoScalingGroupRequest {
        maxSize = 3
        serviceLinkedRoleArn = serviceLinkedRoleARNVal
        autoScalingGroupName = groupName
        launchTemplate = templateSpecification
    }

    val groupsRequestWaiter = DescribeAutoScalingGroupsRequest {
        autoScalingGroupNames = listOf(groupName)
    }

    AutoScalingClient { region = "us-east-1" }.use { autoScalingClient ->
        autoScalingClient.updateAutoScalingGroup(groupRequest)
        autoScalingClient.waitUntilGroupExists(groupsRequestWaiter)
        println("You successfully updated the Auto Scaling group  $groupName")
    }
}

    public function updateAutoScalingGroup($autoScalingGroupName, $args)
    {
        if (array_key_exists('MaxSize', $args)) {
            $maxSize = ['MaxSize' => $args['MaxSize']];
        } else {
            $maxSize = [];
        }
        if (array_key_exists('MinSize', $args)) {
            $minSize = ['MinSize' => $args['MinSize']];
        } else {
            $minSize = [];
        }
        $parameters = ['AutoScalingGroupName' => $autoScalingGroupName];
        $parameters = array_merge($parameters, $minSize, $maxSize);
        return $this->autoScalingClient->updateAutoScalingGroup($parameters);
    }

class AutoScalingWrapper:
    """Encapsulates Amazon EC2 Auto Scaling actions."""

    def __init__(self, autoscaling_client):
        """
        :param autoscaling_client: A Boto3 Amazon EC2 Auto Scaling client.
        """
        self.autoscaling_client = autoscaling_client


    def update_group(self, group_name, **kwargs):
        """
        Updates an Auto Scaling group.

        :param group_name: The name of the group to update.
        :param kwargs: Keyword arguments to pass through to the service.
        """
        try:
            self.autoscaling_client.update_auto_scaling_group(
                AutoScalingGroupName=group_name, **kwargs
            )
        except ClientError as err:
            logger.error(
                "Couldn't update group %s. Here's why: %s: %s",
                group_name,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise

async fn update_group(client: &Client, name: &str, size: i32) -> Result<(), Error> {
    client
        .update_auto_scaling_group()
        .auto_scaling_group_name(name)
        .max_size(size)
        .send()
        .await?;

    println!("Updated AutoScaling group");

    Ok(())
}

    /// <summary>
    /// Get data about the instances in an Amazon EC2 Auto Scaling group.
    /// </summary>
    /// <param name="groupName">The name of the Amazon EC2 Auto Scaling group.</param>
    /// <returns>A list of Amazon EC2 Auto Scaling details.</returns>
    public async Task<List<AutoScalingInstanceDetails>> DescribeAutoScalingInstancesAsync(
        string groupName)
    {
        var groups = await DescribeAutoScalingGroupsAsync(groupName);
        var instanceIds = new List<string>();
        groups!.ForEach(group =>
        {
            if (group.AutoScalingGroupName == groupName)
            {
                group.Instances.ForEach(instance =>
                {
                    instanceIds.Add(instance.InstanceId);
                });
            }
        });

        var scalingGroupsRequest = new DescribeAutoScalingInstancesRequest
        {
            MaxRecords = 10,
            InstanceIds = instanceIds,
        };

        var response = await _amazonAutoScaling.DescribeAutoScalingInstancesAsync(scalingGroupsRequest);
        var instanceDetails = response.AutoScalingInstances;

        return instanceDetails;
    }

        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";

    Aws::AutoScaling::AutoScalingClient autoScalingClient(clientConfig);

    Aws::AutoScaling::Model::DescribeAutoScalingGroupsRequest request;
    Aws::Vector<Aws::String> groupNames;
    groupNames.push_back(groupName);
    request.SetAutoScalingGroupNames(groupNames);

    Aws::AutoScaling::Model::DescribeAutoScalingGroupsOutcome outcome =
            client.DescribeAutoScalingGroups(request);

    if (outcome.IsSuccess()) {
        autoScalingGroup = outcome.GetResult().GetAutoScalingGroups();
    }
    else {
        std::cerr << "Error with AutoScaling::DescribeAutoScalingGroups. "
                  << outcome.GetError().GetMessage()
                  << std::endl;
    }

    public static String getAutoScaling( AutoScalingClient autoScalingClient, String groupName) {
        try{
            String instanceId = "";
            DescribeAutoScalingGroupsRequest scalingGroupsRequest = DescribeAutoScalingGroupsRequest.builder()
                .autoScalingGroupNames(groupName)
                .build();

            DescribeAutoScalingGroupsResponse response = autoScalingClient.describeAutoScalingGroups(scalingGroupsRequest);
            List<AutoScalingGroup> groups = response.autoScalingGroups();
            for (AutoScalingGroup group: groups) {
                System.out.println("The group name is " + group.autoScalingGroupName());
                System.out.println("The group ARN is " + group.autoScalingGroupARN());

                List<Instance> instances = group.instances();
                for (Instance instance : instances) {
                    instanceId = instance.instanceId();
                }
            }
            return instanceId;
        } catch (AutoScalingException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }

suspend fun getAutoScalingGroups(groupName: String) {
    val scalingGroupsRequest = DescribeAutoScalingGroupsRequest {
        autoScalingGroupNames = listOf(groupName)
    }

    AutoScalingClient { region = "us-east-1" }.use { autoScalingClient ->
        val response = autoScalingClient.describeAutoScalingGroups(scalingGroupsRequest)
        response.autoScalingGroups?.forEach { group ->
            println("The group name is ${group.autoScalingGroupName}")
            println("The group ARN is ${group.autoScalingGroupArn}")
            group.instances?.forEach { instance ->
                println("The instance id is ${instance.instanceId}")
                println("The lifecycle state is " + instance.lifecycleState)
            }
        }
    }
}

    public function describeAutoScalingGroups($autoScalingGroupNames)
    {
        return $this->autoScalingClient->describeAutoScalingGroups([
            'AutoScalingGroupNames' => $autoScalingGroupNames
        ]);
    }

class AutoScalingWrapper:
    """Encapsulates Amazon EC2 Auto Scaling actions."""

    def __init__(self, autoscaling_client):
        """
        :param autoscaling_client: A Boto3 Amazon EC2 Auto Scaling client.
        """
        self.autoscaling_client = autoscaling_client


    def describe_group(self, group_name):
        """
        Gets information about an Auto Scaling group.

        :param group_name: The name of the group to look up.
        :return: Information about the group, if found.
        """
        try:
            response = self.autoscaling_client.describe_auto_scaling_groups(
                AutoScalingGroupNames=[group_name]
            )
        except ClientError as err:
            logger.error(
                "Couldn't describe group %s. Here's why: %s: %s",
                group_name,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            groups = response.get("AutoScalingGroups", [])
            return groups[0] if len(groups) > 0 else None

async fn list_groups(client: &Client) -> Result<(), Error> {
    let resp = client.describe_auto_scaling_groups().send().await?;

    println!("Groups:");

    let groups = resp.auto_scaling_groups();

    for group in groups {
        println!(
            "Name:  {}",
            group.auto_scaling_group_name().unwrap_or("Unknown")
        );
        println!(
            "Arn:   {}",
            group.auto_scaling_group_arn().unwrap_or("unknown"),
        );
        println!("Zones: {:?}", group.availability_zones(),);
        println!();
    }

    println!("Found {} group(s)", groups.len());

    Ok(())
}

    /// <summary>
    /// Delete an Auto Scaling group.
    /// </summary>
    /// <param name="groupName">The name of the Amazon EC2 Auto Scaling group.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> DeleteAutoScalingGroupAsync(
        string groupName)
    {
        var deleteAutoScalingGroupRequest = new DeleteAutoScalingGroupRequest
        {
            AutoScalingGroupName = groupName,
            ForceDelete = true,
        };

        var response = await _amazonAutoScaling.DeleteAutoScalingGroupAsync(deleteAutoScalingGroupRequest);
        if (response.HttpStatusCode == System.Net.HttpStatusCode.OK)
        {
            Console.WriteLine($"You successfully deleted {groupName}");
            return true;
        }

        Console.WriteLine($"Couldn't delete {groupName}.");
        return false;
    }

        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";

    Aws::AutoScaling::AutoScalingClient autoScalingClient(clientConfig);

            Aws::AutoScaling::Model::DeleteAutoScalingGroupRequest request;
            request.SetAutoScalingGroupName(groupName);

            Aws::AutoScaling::Model::DeleteAutoScalingGroupOutcome outcome =
                    autoScalingClient.DeleteAutoScalingGroup(request);

            if (outcome.IsSuccess()) {
                std::cout << "Auto Scaling group '" << groupName << "' was deleted."
                          << std::endl;
            }
            else {
                std::cerr << "Error with AutoScaling::DeleteAutoScalingGroup. "
                          << outcome.GetError().GetMessage()
                          << std::endl;
                result = false;
            }
        }

    public static void deleteAutoScalingGroup(AutoScalingClient autoScalingClient, String groupName) {
        try {
            DeleteAutoScalingGroupRequest deleteAutoScalingGroupRequest = DeleteAutoScalingGroupRequest.builder()
                .autoScalingGroupName(groupName)
                .forceDelete(true)
                .build() ;

            autoScalingClient.deleteAutoScalingGroup(deleteAutoScalingGroupRequest) ;
            System.out.println("You successfully deleted "+groupName);

        } catch (AutoScalingException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

suspend fun deleteSpecificAutoScalingGroup(groupName: String) {
    val deleteAutoScalingGroupRequest = DeleteAutoScalingGroupRequest {
        autoScalingGroupName = groupName
        forceDelete = true
    }

    AutoScalingClient { region = "us-east-1" }.use { autoScalingClient ->
        autoScalingClient.deleteAutoScalingGroup(deleteAutoScalingGroupRequest)
        println("You successfully deleted $groupName")
    }
}

    public function deleteAutoScalingGroup($autoScalingGroupName)
    {
        return $this->autoScalingClient->deleteAutoScalingGroup([
            'AutoScalingGroupName' => $autoScalingGroupName,
            'ForceDelete' => true,
        ]);
    }

Update the minimum size of an Auto Scaling group to zero, terminate all instances in the group, and delete the group.

class AutoScaler:
    """
    Encapsulates Amazon EC2 Auto Scaling and EC2 management actions.
    """

    def __init__(
        self,
        resource_prefix,
        inst_type,
        ami_param,
        autoscaling_client,
        ec2_client,
        ssm_client,
        iam_client,
    ):
        """
        :param resource_prefix: The prefix for naming AWS resources that are created by this class.
        :param inst_type: The type of EC2 instance to create, such as t3.micro.
        :param ami_param: The Systems Manager parameter used to look up the AMI that is
                          created.
        :param autoscaling_client: A Boto3 EC2 Auto Scaling client.
        :param ec2_client: A Boto3 EC2 client.
        :param ssm_client: A Boto3 Systems Manager client.
        :param iam_client: A Boto3 IAM client.
        """
        self.inst_type = inst_type
        self.ami_param = ami_param
        self.autoscaling_client = autoscaling_client
        self.ec2_client = ec2_client
        self.ssm_client = ssm_client
        self.iam_client = iam_client
        self.launch_template_name = f"{resource_prefix}-template"
        self.group_name = f"{resource_prefix}-group"
        self.instance_policy_name = f"{resource_prefix}-pol"
        self.instance_role_name = f"{resource_prefix}-role"
        self.instance_profile_name = f"{resource_prefix}-prof"
        self.bad_creds_policy_name = f"{resource_prefix}-bc-pol"
        self.bad_creds_role_name = f"{resource_prefix}-bc-role"
        self.bad_creds_profile_name = f"{resource_prefix}-bc-prof"
        self.key_pair_name = f"{resource_prefix}-key-pair"


    def _try_terminate_instance(self, inst_id):
        stopping = False
        log.info(f"Stopping {inst_id}.")
        while not stopping:
            try:
                self.autoscaling_client.terminate_instance_in_auto_scaling_group(
                    InstanceId=inst_id, ShouldDecrementDesiredCapacity=True
                )
                stopping = True
            except ClientError as err:
                if err.response["Error"]["Code"] == "ScalingActivityInProgress":
                    log.info("Scaling activity in progress for %s. Waiting...", inst_id)
                    time.sleep(10)
                else:
                    raise AutoScalerError(f"Couldn't stop instance {inst_id}: {err}.")

    def _try_delete_group(self):
        """
        Tries to delete the EC2 Auto Scaling group. If the group is in use or in progress,
        the function waits and retries until the group is successfully deleted.
        """
        stopped = False
        while not stopped:
            try:
                self.autoscaling_client.delete_auto_scaling_group(
                    AutoScalingGroupName=self.group_name
                )
                stopped = True
                log.info("Deleted EC2 Auto Scaling group %s.", self.group_name)
            except ClientError as err:
                if (
                    err.response["Error"]["Code"] == "ResourceInUse"
                    or err.response["Error"]["Code"] == "ScalingActivityInProgress"
                ):
                    log.info(
                        "Some instances are still running. Waiting for them to stop..."
                    )
                    time.sleep(10)
                else:
                    raise AutoScalerError(
                        f"Couldn't delete group {self.group_name}: {err}."
                    )

    def delete_group(self):
        """
        Terminates all instances in the group, deletes the EC2 Auto Scaling group.
        """
        try:
            response = self.autoscaling_client.describe_auto_scaling_groups(
                AutoScalingGroupNames=[self.group_name]
            )
            groups = response.get("AutoScalingGroups", [])
            if len(groups) > 0:
                self.autoscaling_client.update_auto_scaling_group(
                    AutoScalingGroupName=self.group_name, MinSize=0
                )
                instance_ids = [inst["InstanceId"] for inst in groups[0]["Instances"]]
                for inst_id in instance_ids:
                    self._try_terminate_instance(inst_id)
                self._try_delete_group()
            else:
                log.info("No groups found named %s, nothing to do.", self.group_name)
        except ClientError as err:
            raise AutoScalerError(f"Couldn't delete group {self.group_name}: {err}.")

async fn delete_group(client: &Client, name: &str, force: bool) -> Result<(), Error> {
    client
        .delete_auto_scaling_group()
        .auto_scaling_group_name(name)
        .set_force_delete(if force { Some(true) } else { None })
        .send()
        .await?;

    println!("Deleted Auto Scaling group");

    Ok(())
}