Launch EC2 instances using a launch template - Amazon Elastic Compute Cloud
Launch an Amazon EC2 instance using a launch templateLaunch instances in an Amazon EC2 Auto Scaling group using a launch templateLaunch an EC2 Fleet using a launch templateLaunch a Spot Fleet using a launch template

Launch EC2 instances using a launch template

An Amazon EC2 launch template stores instance launch parameters so that you don't have to specify them every time you launch an instance.

Several instance launch services can optionally use launch templates when launching instances, while for other services, like EC2 Fleet, instances can't be launched unless a launch template is used. This topic describes how to use a launch template when launching an instance using the EC2 launch instance wizard, Amazon EC2 Auto Scaling, EC2 Fleet, and Spot Fleet.

For more information about launch templates, including how to create a launch template, see Store instance launch parameters in Amazon EC2 launch templates.

Launch an Amazon EC2 instance using a launch template

You can use the parameters contained in a launch template to launch an Amazon EC2 instance. After selecting the launch template, but before launching the instance, you can modify the launch parameters.

Instances that are launched using a launch template are automatically assigned two tags with the keys aws:ec2launchtemplate:id and aws:ec2launchtemplate:version. You can't remove or edit these tags.

Console
To launch an instance using a launch template

  1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

  2. Use one of the following options to select the launch template:

    • From the Amazon EC2 console dashboard, choose the down arrow next to Launch instance, choose Launch instance from template, and then for Source template, select a launch template.

    • In the navigation pane, choose Launch Templates, select the launch template, and choose Actions, Launch instance from template.

  3. For Source template version, select the launch template version to use.

  4. (Optional) You can modify the values for any of the launch parameters. If you don't modify a value, the value defined by the launch template is used. If no value was specified in the launch template, the default value for the parameter is used.

  5. In the Summary panel, for Number of instances, specify the number of instances to launch.

  6. Choose Launch instance.

    If the instance fails to launch or the state immediately goes to terminated instead of running, see Troubleshoot Amazon EC2 instance launch issues.

AWS CLI
To launch an instance from a launch template

  • Use the run-instances command and specify the --launch-template parameter. Optionally specify the launch template version to use. If you don't specify the version, the default version is used.

    aws ec2 run-instances \
    --launch-template LaunchTemplateId=lt-0abcd290751193123,Version=1

  • To override a launch template parameter, specify the parameter in the run-instances command. The following example overrides the instance type that's specified in the launch template (if any).

    aws ec2 run-instances \
    --launch-template LaunchTemplateId=lt-0abcd290751193123 \
    --instance-type t2.small

  • If you specify a nested parameter that's part of a complex structure, the instance is launched using the complex structure as specified in the launch template plus any additional nested parameters that you specify.

    In the following example, the instance is launched with the tag Owner=TeamA as well as any other tags that are specified in the launch template. If the launch template has an existing tag with a key of Owner, the value is replaced with TeamA.

    aws ec2 run-instances \
    --launch-template LaunchTemplateId=lt-0abcd290751193123 \
    --tag-specifications "ResourceType=instance,Tags=[{Key=Owner,Value=TeamA}]"

    In the following example, the instance is launched with a volume with the device name /dev/xvdb as well as any other block device mappings that are specified in the launch template. If the launch template has an existing volume defined for /dev/xvdb, its values are replaced with the specified values.

    aws ec2 run-instances \
    --launch-template LaunchTemplateId=lt-0abcd290751193123 \
    --block-device-mappings "DeviceName=/dev/xvdb,Ebs={VolumeSize=20,VolumeType=gp2}"

If the instance fails to launch or the state immediately goes to terminated instead of running, see Troubleshoot Amazon EC2 instance launch issues.

PowerShell
To launch an instance from a launch template using the AWS Tools for PowerShell

  • Use the New-EC2Instance command and specify the -LaunchTemplate parameter. Optionally specify the launch template version to use. If you don't specify the version, the default version is used.

    Import-Module AWS.Tools.EC2
New-EC2Instance `
    -LaunchTemplate ( 
        New-Object -TypeName Amazon.EC2.Model.LaunchTemplateSpecification -Property @{ 
            LaunchTemplateId = 'lt-0abcd290751193123'; 
            Version          = '4' 
    } 
)

  • To override a launch template parameter, specify the parameter in the New-EC2Instance command. The following example overrides the instance type that's specified in the launch template (if any).

    Import-Module AWS.Tools.EC2
New-EC2Instance `
    -InstanceType t4g.small `
    -LaunchTemplate (
        New-Object -TypeName Amazon.EC2.Model.LaunchTemplateSpecification -Property @{ 
            LaunchTemplateId = 'lt-0abcd290751193123'; 
            Version          = '4' 
    } 
)

  • If you specify a nested parameter that's part of a complex structure, the instance is launched using the complex structure as specified in the launch template plus any additional nested parameters that you specify.

    In the following example, the instance is launched with the tag Owner=TeamA as well as any other tags that are specified in the launch template. If the launch template has an existing tag with a key of Owner, the value is replaced with TeamA.

    Import-Module AWS.Tools.EC2
New-EC2Instance `
    -InstanceType t4g.small  `
    -LaunchTemplate ( 
        New-Object -TypeName Amazon.EC2.Model.LaunchTemplateSpecification -Property @{ 
            LaunchTemplateId = 'lt-0abcd290751193123'; 
            Version          = '4' 
        } 
) `
    -TagSpecification ( 
        New-Object -TypeName Amazon.EC2.Model.TagSpecification -Property @{ 
            ResourceType = 'instance'; 
            Tags         = @( 
                @{key = "Owner"; value = "TeamA" }, 
                @{key = "Department"; value = "Operations" } 
            ) 
        } 
)

    In the following example, the instance is launched with a volume with the device name /dev/xvdb as well as any other block device mappings that are specified in the launch template. If the launch template has an existing volume defined for /dev/xvdb, its values are replaced with the specified values.

    Import-Module AWS.Tools.EC2
New-EC2Instance `
    -InstanceType t4g.small  `
    -LaunchTemplate ( 
        New-Object -TypeName Amazon.EC2.Model.LaunchTemplateSpecification -Property @{ 
            LaunchTemplateId = 'lt-0abcd290751193123'; 
            Version          = '4' 
    } 
) `
    -BlockDeviceMapping  ( 
        New-Object -TypeName Amazon.EC2.Model.BlockDeviceMapping -Property @{ 
            DeviceName = '/dev/xvdb'; 
            EBS        = ( 
                New-Object -TypeName Amazon.EC2.Model.EbsBlockDevice -Property @{ 
                    VolumeSize = 25; 
                    VolumeType = 'gp3' 
                } 
            ) 
        } 
)

If the instance fails to launch or the state immediately goes to terminated instead of running, see Troubleshoot Amazon EC2 instance launch issues.

Launch instances in an Amazon EC2 Auto Scaling group using a launch template

You can create an Auto Scaling group and specify a launch template to use for the group. When Amazon EC2 Auto Scaling launches instances in the Auto Scaling group, it uses the launch parameters defined in the associated launch template.

Before you can create an Auto Scaling group using a launch template, you must first create a launch template that includes the parameters required to launch an instance in an Auto Scaling group. Some parameters are required, such as the ID of the AMI, and some parameters are not available to use with an Auto Scaling group. The console provides guidance to help you create a template that you can use with Amazon EC2 Auto Scaling.

To create an Auto Scaling group with a launch template using the console
To create or update an Auto Scaling group with a launch template using the AWS CLI

For more information, see the following topics in the Amazon EC2 Auto Scaling User Guide:

Launch an EC2 Fleet using a launch template

A launch template is a requirement when creating an EC2 Fleet request. When Amazon EC2 fulfills the EC2 Fleet request, it uses the launch parameters defined in the associated launch template. You can override some of the parameters that are specified in the launch template. For more information, see Create an EC2 Fleet.

To create an EC2 Fleet with a launch template using the AWS CLI

  • Use the create-fleet command. Use the --launch-template-configs parameter to specify the launch template and any overrides for the launch template.

Launch a Spot Fleet using a launch template

A launch template is optional when creating a Spot Fleet request. If you don't use a launch template, you can manually specify the launch parameters. If you use a launch template, when Amazon EC2 fulfills the Spot Fleet request, it uses the launch parameters defined in the associated launch template. You can override some of the parameters that are specified in the launch template. For more information, see Create a Spot Fleet.

To create a Spot Fleet request using a launch template

  1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

  2. In the navigation pane, choose Spot Requests.

  3. Choose Request Spot Instances.

  4. Under Launch parameters, choose Use a launch template.

  5. For Launch template, choose a launch template, and then, from the field to the right, choose the launch template version.

  6. Configure your Spot Fleet by selecting different options on this screen. For more information about the options, see Create a Spot Fleet request using defined parameters (console).

  7. When you're ready to create your Spot Fleet, choose Launch.

To create a Spot Fleet request using a launch template

  • Use the request-spot-fleet command. Use the LaunchTemplateConfigs parameter to specify the launch template and any overrides for the launch template.