Overview of the deployment workflows¶

You can modify the following OpenStack environment deployment stages using custom deployment workflows:

• Deletion - if you deploy a brand new environment, Fuel skips this step. If you make changes to the existing environment, Fuel deletes nodes that were marked for deletion.
• Network verification - Fuel verifies network configuration of the OpenStack environment.
• Provisioning - Fuel provisions the OpenStack nodes.
• Deployment - Fuel deploys the OpenStack environment.

An OpenStack environment has the following level of deployment workflows:

• release - describes the default OpenStack environment workflows. We do not recommend to make any changes in the release workflow. Apply all changes to the release workflow by creating and modifying the plugin and cluster workflows.
• plugin - describes plugin deployment workflow. During the deployment, Fuel merges the configuration described in the plugin workflows with the release workflow and applies a unified deployment graph. Typically, plugin’s source code includes the descriptions of deployment workflow in deployment_tasks.yaml. By default, Fuel includes an empty plugin workflow. If you want to make changes in an OpenStack environment, creating a plugin is the preferred way.
• cluster - describes the changes that will be applied to this OpenStack environment. Use this option only if creating a plugin is not possible. In all other cases, create a plugin.