Creating a Launch Template

Scenarios

A launch template is used to quickly create instances. It contains the configuration information required for creating instance, including the billing mode, region, AZ, instance specifications, image, system and data disks, network, and key pair (excluding the password). After a launch template is created, a new launch template is generated, and version 1 is automatically assigned as its default version.

This section describes how to create a launch template on the management console.

Constraints

Each account can have a maximum of 30 launch templates in each region.
When you create a launch template, the configuration items are classified into mandatory and optional items. The mandatory items include the instance, image, VPC, and launch template name. If the mandatory items are not configured, the launch template cannot be created. You can set the parameters that are not preset in the launch template when using the template to create instances.
When you save a launch template through the ECS custom config mode, the system automatically converts the values of certain parameters. For example, the yearly/monthly billing mode will be converted to the pay-per-use billing mode. For details, see Supported Parameter Configurations for Launch Templates.
After a launch template is created, it cannot be modified. You can create multiple launch templates as required, with each configured with different parameters.
Currently, launch templates are supported in AP-Singapore and CN-Hong Kong.

Creating a Launch Template

You can save the instance configurations as a launch template when purchasing instances in custom mode, or create a launch template on the Auto Launch Groups console.

You can save the ECS configurations as a launch template when creating an ECS.

Go to the Buy ECS page. On the displayed page, click the Custom Config tab in the upper left corner.
On the Custom Config tab, set the required parameters.
For details about the parameters, see Purchasing an ECS in Custom Config Mode.
In the Configuration Summary panel on the right side, review the ECS configuration details.
Unspecified mandatory parameters are highlighted in red. Set them in the parameter configuration area.
In the Configuration Summary panel, click Save as Launch Template.
Some parameter values cannot be saved to the launch template. The system will automatically convert them. For details, see Supported Parameter Configurations for Launch Templates.
Read the agreement and click Agree and Save.

In the displayed dialog box, configure the template information.

**Table 1** Parameters for creating a launch template
Parameter	Description
Launch Template Name	Mandatory. The name of the launch template. It can contain 1 to 64 characters, including only letters, digits, underscores (_), hyphens (-), and periods (.).
Description	Optional. The description of the launch template, which helps you manage the template later. It can contain 0 to 85 characters and cannot contain left angle brackets (<), right angle brackets (>), or control characters (such as line breaks, tabs, and backspaces).

Click OK. The launch template is created.
Go back to the launch template list and you can view the created launch template.

Go to the launch template list page.
In the upper right corner of the launch template list, click Create Launch Template.
The Create Launch Template page is displayed.

Configure the ECS instance configurations and launch template parameters.

For details about ECS instance configurations, see Purchasing an ECS in Custom Config Mode.

For details about launch template parameters, see Table 2.

**Table 2** Parameters for creating a launch template
Parameter	Description
Launch Template Name	Mandatory. The name of the launch template. It can contain 1 to 64 characters, including only letters, digits, underscores (_), hyphens (-), and periods (.).
Description	Optional. The description of the launch template, which helps you manage the template later. It can contain 0 to 85 characters and cannot contain left angle brackets (<), right angle brackets (>), or control characters (such as line breaks, tabs, and backspaces).

In the Configuration Summary panel on the right side, review the ECS configuration details.
Unspecified mandatory parameters are highlighted in red. Set them in the parameter configuration area.
Read and agree to the agreement, and click Create Now.
Go back to the launch template list and you can view the created launch template.

Supported Parameter Configurations for Launch Templates

When you create a launch template through the ECS custom config mode, some parameter values cannot be saved to the template. The system will automatically convert these values.

**Table 3** Rules for saving custom config parameters to templates
Module	Parameter	Custom Configuration	Saved to Launch Template	Value Converted	Value Saved in Launch Template
Basic Configuration	Billing Mode	Yearly/Monthly	Yes	Yes	Pay-per-use
		Pay-per-use	Yes	No	Pay-per-use
		Spot pricing - Spot	Yes	No	Spot pricing - Spot
		Spot pricing - Spot block	Yes	Yes	Pay-per-use
	Region	Select a region	Yes	Yes	The region that the launch template belongs to
	AZ	Random	Yes	No	Random
		Select an AZ	Yes	Yes	The AZ that the launch template belongs to
		Edge AZ	No	No	N/A
		Randomly allocated to multiple AZs	No	No	N/A
Instance	Specifications	Select specifications	Yes	No	The specifications you selected
OS	Image	Select an image	Yes	No	The image you selected
	Host protection (HSS)	Enable	Yes	No	Enable
	Application acceleration	Enable	No	No	Disabled by default.
	Enclave	Enable	No	No	Disabled by default.
Storage & Backup	System/Data Disk	Select a disk type	Yes	No	The disk type you selected
		Specify the disk size	Yes	No	The disk size you specified
		Select Encryption	Yes	No	Encryption enabled
		Specify the KMS key name/ID	Yes	No	The KMS key name/ID you specified
		Disk type (VBD/SCSI)	No	No	N/A
		Storage type (EVS/DSS)	No	No	N/A
		Storage pool ID	No	No	N/A
		IOPS/Throughput	No	No	N/A
		Select Sharing	No	No	N/A
		Select Release with ECS	No	No	N/A
		Select Create Disk from Data Disk Image	No	No	N/A
	Cloud Backup and Recovery	Create new/Use existing/Disable backup	No	No	N/A
		Backup Policy	No	No	N/A
		Vault Capacity	No	No	N/A
		Cloud Backup Vault	No	No	N/A
Network	VPC	Select a VPC	Yes	No	The VPC you selected
	Primary NIC	Select a subnet	Yes	No	The subnet you selected
		Automatically assign IP address/Manually specify IP address	No	No	Automatically assign IP address
		IPv6 not required/Automatically-assigned IPv6 address	No	No	IPv6 not required/Automatically-assigned IPv6 address
		Bind a shared bandwidth	No	No	No shared bandwidth
		Source/Destination Check	No	No	N/A
	Security Group	Select a security group	Yes	No	The security group you selected
Public Network Access	EIP	Select an EIP type	Yes	No	The EIP type you selected
		Select Bandwidth for Billed By	Yes	No	Billed by bandwidth
		Specify the bandwidth size	Yes	No	The bandwidth size you specified
		Select Shared bandwidth for Billed By and select a bandwidth name	Yes	No	The bandwidth name you selected
		EIP Pool	No	No	N/A
		Use existing	No	No	N/A
		Select Release with ECS	No	No	Deselected by default
Instance Management	ECS Name	Specify an ECS name	Yes	No	The ECS name you specified
	ECS Name	Select Allow duplicate name	No	No	N/A
	Login Mode	Password	No	No	Unconfigured
		Key pair	Yes	No	The key pair you selected
		Set password later	No	No	Unconfigured
		Password from image	No	No	Unconfigured
	Enterprise Project	Specify an enterprise project	Yes	No	The enterprise project you selected
	Tag	Add a tag	Yes	No	The tag you added
Advanced Settings	Detailed monitoring	Enable	Yes	No	Detailed monitoring enabled
	ECS group	Select ECS group	No	No	N/A
	ECS Description	Enter a description	Yes	No	The description you entered
	User Data	Inject user data	Yes	No	The data you injected
	Agency	Select an agency	Yes	No	The agency you selected
	Metadata Access	Enable	No	No	N/A
	Metadata Version	Only V2 (Token)	No	No	N/A
	CPU Options	Select Specify CPU options	No	No	N/A
Purchase Details	Required Duration	Select Set scheduled deletion time	No	No	N/A
	Required Duration	1 month	No	No	N/A
	Auto-renew	Enable	No	No	N/A
	Quantity	1	No	No	N/A

Helpful Links

After a launch template is created, you can use it to perform operations listed in the following table.

Related Operations	Scenario	Reference
Creating ECSs	You can use a launch template to quickly create ECSs, saving time on repeatedly configuring parameters.	Using a Launch Template to Purchase ECSs (On the Buy ECS Page)
Creating ECSs		Using a Launch Template to Purchase ECSs (On the Launch Templates Page)
Creating an auto launch group	When creating an auto launch group, you need to select a launch template as the configuration source.	Creating an Auto Launch Group
Viewing launch template details	You can view details about a launch template.	Viewing Details About a Launch Template
Deleting a launch template	You can delete a launch template that is no longer needed.	Deleting a Launch Template

Parent Topic: Launch Templates

Previous topic: Overview

Next topic: Managing Launch Templates

Creating a Launch Template

Scenarios

Constraints

Creating a Launch Template

Supported Parameter Configurations for Launch Templates

Helpful Links

What is your overall rating for this page?