Launch Configuration Template

Links: 101 AWS SAA Index

  • Launch configuration is legacy

  • Launch template is the newer version

  • In launch templates we can have:

    • Multiple versions
    • We can use inheritance by creating partial launch templates
    • We can provision a mix of on demand and spot instances. This is not possible in launch configuration.
To remember T > C.
  • Launch templates are recommended by AWS.
  • Launch configurations cannot be versioned and you have to create new ones every time if you want to make any changes. They cannot be modified.
Which tenancy to use?
  • When you create a launch configuration, the default value for the instance placement tenancy is null and the instance tenancy is controlled by the tenancy attribute of the VPC.
  • If you set the Launch Configuration Tenancy to default and the VPC Tenancy is set to dedicated, then the instances have dedicated tenancy.
  • If you set the Launch Configuration Tenancy to dedicated and the VPC Tenancy is set to default, then again the instances have dedicated tenancy.

Always dedicated.

Last updated: 2022-05-05