{"id":5768,"date":"2019-02-05T18:50:20","date_gmt":"2019-02-05T18:50:20","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=5768"},"modified":"2021-11-17T08:59:17","modified_gmt":"2021-11-17T08:59:17","slug":"udeploy-component-rollback-explained","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/udeploy-component-rollback-explained\/","title":{"rendered":"uDeploy Component Rollback explained!!!"},"content":{"rendered":"

\"\"<\/a><\/p>\n

What is Rollback?
\nAutomatically moving component versions(That is, the environment inventory) to a previous state.
\n– To the versions that were deployed before a process began
\n– To the versions in a snapshot<\/p>\n

In most cases, to switch to a different version of a component, you deploy the new version over the existing version. If necessary, you can run the uninstall process for the component first.<\/p>\n

In most cases, to switch to a different version of a component, you deploy the new version over the existing version. If necessary, you can run the uninstall process for the component first.<\/p>\n

However, you can also use the “Rollback Component” step to automate the process of switching to a previous component version. This step has two options:<\/p>\n

    \n
  1. Replace with Last Deployed: This option rolls back components that fail to deploy. i.e Uninstalling components with an application process.<\/li>\n
  2. Remove Undesired Incremental Versions: This option removes versions that are not in a specified snapshot. i.e Rolling back to a snapshot.<\/li>\n<\/ol>\n

    When Not to use Rollback?<\/strong>
    \n– When you can deploy the desired version directly<\/p>\n

    When to use Rollback?<\/strong>
    \nScenario 1:<\/strong> Rolling Back a failed deployment automatically – Catch an error in a process and automatcally redeploy the versions from before the process ran. This keep applications running without downtime. Also called “Replace with last deployed”.<\/p>\n

    Scenario 2:<\/strong> Rolling Back to a Snapshot
    \nBackup to a known good state. Also Called “Removed undesired increamental versions”. Prerequisites of Rolling Back to a Snapshot are…
    \n– A Snapshot
    \n– A process that uninstall the component<\/p>\n

    Reference<\/strong>
    \nhttps:\/\/www.ibm.com\/support\/knowledgecenter\/SS4GSP_7.0.0\/com.ibm.udeploy.doc\/topics\/app_processsteps_rollback.html<\/p>\n\n