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• Important points

• Kyvos Rollback

• Kyvos Manager Rollback through Terminal

Important points

• For enforcing free disk space for the required partition, see the Verifying free disk space for partition section.

• For Azure, before upgrading, it is recommended that you remove the previously installed Jar files from Databricks to prevent overwriting or corruption of Jar files.

• For AWS, the restoration process for the external repository RDS has been automated, eliminating the need for manual intervention.

• For AWS, if Kyvos is using an external repository RDS as its repository, before initiating a Kyvos rollback, ensure that the 'UsedBy' tag with a value of 'Kyvos' is added to the RDS subnet/security group used for creating the database instance, if it has not already been added.

• In case of a Rollback, the previous state of Kyvos is restored. In case you made any entity-specific modifications like changes to the semantic model design, registered files, users, etc., Kyvos recommends the designers/Admins create a cab as a backup before rollback and import the cab file to the rolled-back version.

• Process operations cannot be persisted.

• If you roll back to a Kyvos Manager process that supports Derby as its repository, any operations, such as audits, events, or other activities (like users add, import, delete, and update) performed using Kyvos Manager build 2023.1 and onwards will NOT be available when you rollback to a Kyvos Manager release previous to 2023.1.

• The rollback operation will take some time to initiate.

• Kyvos rollback to earlier releases not supporting Flexible server:

  • Post Kyvos rollback, configure the single server in Kyvos through the switch repository of Kyvos Manager. The application automatically handles the single server being configured. It must have the same compatible state of the database with the Kyvos release to which rollback is performed.

  • A change in the user name will be required while configuring a single server in the system as it requires appending the server name to the username.

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1. Change the JDBC URL in the jdbc.properties to a Derby-specific URL. To do this, you must rename the existing jdbc.properties (using Postgres as a repository) to the jdbc.properties.postgres and then rename the existing jdbc.properties.derby to jdbc. properties.
   NOTE: The files are located at:  kyvosmanagerdata/server/db/

2. In addition, if the bundled Postgres is used as the Kyvos Manager repository, it is necessary to move the Postgres folder inside Kyvos on each node of the cluster from its current location parallel to Kyvos.

3. To switch back to the old Derby-compatible version of Kyvos Manager, first stop the current Postgres, which is supported as the Kyvos Manager process repository.

4. If a Kyvos rollback is also required, then perform it using the Derby-compatible Kyvos Manager only. Also, ensure that you perform Step 3.

Kyvos Manager Rollback through Terminal

Important points to know

• From Kyvos 2024.2 onwards, If Kyvos Reporting Service is deployed and you want to roll back the Kyvos Manager release earlier to 2024.2, then before performing Kyvos Manager rollback, you must remove Kyvos Reporting Service.

• Logs of Kyvos Manager Tomcat Server will be generated in the kyvosmanagerdata/server/tomcatLogs path. If you rollback Kyvos Manager to an older version, logs will be generated inside the kyvosmanager_war/kyvosmanager/logs/ folder of the Kyvos Manager on which the rollback was performed.

• In case of a Rollback, the previous state of Kyvos Manager is restored. In case you made any changes that you need in the previous state, you need to perform them again.

To roll back to a previous version, perform the following steps. 

1. Create a backup for the Kyvos Manager data, perform the following steps.

2. Log in to the Kyvos Manager machine through the terminal.

3. Navigate to the Kyvos Manager installation path.

4. Stop the Kyvos Manager process using the command:
   ./kyvosmanager_war/kyvosmanager/bin/stop-km.sh 

5. Identify the location for the used kyvosmanagerdata  folder. For this, check the value of KM_DATA_DIR  in the set env.sh  file in the  bin  folder.
   This folder contains the Kyvos Manager data, including the repository.

6. Go to the parent folder of the kyvosmanagerdata  folder and run the command.
   tar -zcvf file_name.tar.gz kyvosmanagerdata
   Here  file_name  is the user backup file name for the Kyvos Manager.

7. Copy the backup file to the local machine.

8. Rename your current  repo  folder at the  kyvosmanagerdata/server  location, such as repo_<current version number>. For example, you can rename it repo_2022.1

9. Locate the version to which you want to roll back (for example, 2021.1), and rename its repo folder (such as repo_2021.1) to repo.

10. Locate the build folder of the Kyvos Manager version to which you want to roll back (for example, 2021.1), and verify the correct value of KM_DATA_DIR  in the set env.sh  file in the  bin  folder.

11. Start the required version of Kyvos Manager using the command:
    ./kyvosmanager_war/kyvosmanager/bin/start-km.sh

Kyvos Manager Rollback to previous releases not supporting Flexible Server

Kyvos Manager rollback to earlier releases (prior to the Kyvos 2023.5 releases that are not supporting Flexible server) when Kyvos Manager using external repository.

• It could be:

  • Kyvos Manager rollback to a release supporting Bundled Postgres: To migrate from external repository to bundled Postgres, see the https://kyvosdocumentation.atlassian.net/wiki/spaces/KD202410/pages/238863788/Configuring+jdbc.properties+for+Kyvos+Manager#External-Repository-to-Bundles-Postgres section.

  • Kyvos Manager rollback to a release supporting Azure Single Server: To migrate from Flexible Server to Single Server, see the https://kyvosdocumentation.atlassian.net/wiki/spaces/KD202410/pages/238863788/Configuring+jdbc.properties+for+Kyvos+Manager#Flexible-Server-to-Single-Server section.

Post-rollback steps

If you have rolled back from 2022.1 or above, and you updated the password or encryption algorithm (feature introduced in version 2022.1), then you need to reconfigure the c luster node password on to the previous Kyvos Manager release.