Rollback for z/OS component version with application template
This page covers below sections
Overview
When designing application process with application template below two differences are observed
- Application process steps like Install Multiple component and Uninstall multiple components works with component tag instead of component name.
- Application process inside an application template has automatic inventory management and cannot be managed manually.
To overcome above differences below changes are needed
- Add a component tag to z/OS component(s)
- Create two component processes under z/OS component (or) component template and two application processes for z/OS Artifacts Rollback. One to run as an operational process and other to run as an uninstall process to remove the version from inventory as shown below
Component Process for Uninstall
- Create a component process with type uninstall and add a set status step to success as below.
This is a dummy step to uninstall the version from the inventory after all the steps of Rollback process is completed successfully.
Application Template Process for Uninstall
- Create a new process in the application template. Add Uninstall Multiple Components step. Update below
- Add name for process step for e.g., “Remove version from inventory”
- Add component tag which has the component process
- Add component process name which has set status step
- Set Uninstall Type to All Selected For Process
Component Process for Rollback
Create a component process with type operational (With version) and add all the steps of a typical rollback process like below
- Rollback Data Sets step
- Generate artifact step, Bind step, CICS step etc.,
- Cleanup backup files step
- Run Application process step
The Run Application process step should point to the uninstall application process and all other values should be UCD properties like below
Application Template Process for Rollback
Create a new process in the application template. Add Uninstall Multiple Components step and update below
- Add name for process step
- Add component tag which has the component process
- Add component process name which has rollback steps
- Set Uninstall Type to All Selected For Process
Execution
To rollback Z Artifacts, run Rollback Z Artifacts process to run all the rollback steps under component process. The Component process triggers Remove Version From Inventory process only when artifacts are rolled back and all the steps ran successfully.
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