Creating a Launch Template

Scenarios

A launch template contains the information required to quickly launch an ECS, for example, the ECS specifications, network settings, and a key pair (excluding the password). You can launch an ECS quickly without specifying the configuration parameters every time.

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.
The parameters you can configure when you create a launch template are optional.
However, if your launch template does not include parameters, such as the flavor and image, you need to set them when you use the template to create an ECS.
The configuration cannot be saved as a launch template if the billing mode is yearly/monthly or spot block, host security is enabled, or the login mode is password.
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 When Buying an ECS

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

Log in to the management console.
Click in the upper left corner and select a region and project.
Click . Under Compute, choose Elastic Cloud Server.
Click Buy ECS.
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 fields are displayed in red. You need to 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 those values. For details, see Savable Launch Settings.
Read the agreement and click Agree and Submit.
In the displayed dialog box, enter a launch template name and description, and click OK.
You can view the created template on the launch template list page.

Creating a Launch Template on the Launch Templates Console

Log in to the management console.
Click in the upper left corner and select a region and project.
Click . Under Compute, choose Elastic Cloud Server.
In the navigation pane on the left, choose Launch Templates.
On the Launch Templates page, click Create Launch Template.
On the Create Launch Template page, configure 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 fields are displayed in red. You need to 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.

Savable Launch Settings

When you use a launch template in custom config mode to launch ECSs, some parameter values cannot be saved to the template. The system will automatically convert those values.

**Table 1** Rules for saving custom purchase parameters to templates
Module	Parameter	Setting	Savable to Launch Template	Value Converted When Saved to Launch Template	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	No	No	Disabled by default.
	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	Set password later
		Key pair	Yes	No	The key pair you selected
		Set password later	Yes	No	Set password later
		Password from image	No	No	Use the image password. The password is empty.
	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