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Heat is a service used to orchestrate multiple composite cloud applications using the AWS CloudFormation template format, through both an OpenStack-native ReST API and a CloudFormation-compatible Query API. The purpose of Heat is to provide a template based orchestration for describing a cloud application by executing appropriate OpenStack API calls to generate running cloud applications, integrate other core components of OpenStack into a one-file template system. The templates allow creation of most OpenStack resource types such as instances, floating ips, volumes, security groups, users, etc. Log in to the OpenStack dashboard, choose a project, and, click the Stacks in the Orchestration category. Click Launch Stack button. A Select Template window opens. Choose between the template source options from the dropdown list. Your options are URL, File or Direct Input. Enter the URL, browse to the file location or directly include the template based on your selection in the previous step. The Launch Stack window opens. In the Launch Stack window, specify the following values. Stack Name A name to identify the stack. Creation Timeout (minutes) Creation Timeout in minutes. Rollback On Failure Check this option if you want Heat to rollback on failure. Password for user "demo" Password for the user logged in. DBUsername Database user name. LinuxDistribution Linux Distribution used in the stacks. DBRootPassword Database root password. KeyName Name of the keypair. DBName Database name. DBPassword Database password. InstanceType Flavor of the instance. Click Launch to create a stack. The dashboard shows the stack in the Stacks category. Once the stack is created, you can click on the stack name to see the following stack details, Topology, Overview, Resources and Events.