CentOS to Ubuntu migration on GCP

To migrate CentOS to Ubuntu on GCP, perform the following steps.

1. Stop BI Server and Query Engine machine from Google console.

2. Once machines are stopped, click the machine. It will open a new screen. Click the Edit button. 

3. Now, scroll down and remove the boot disk by clicking the Detach Boot Disk option. Once the boot disk is detached from the machine. You will get the option to configure the boot disk.

4. Upon clicking the Configure Boot Disk option, it will open a new side screen. Here, select Custom Images and choose the latest provided Ubuntu image (kyvos-ubuntu20-image-2023-11-07) and provide any name of your choice; use the device name as boot, and other details will be auto-filled.

   Open

   
   Open

   

5. Now, scroll down to the Startup script section and update the startup script content with new startup script (bi_qe.sh). Add a key name Rerun and value as true. If the Rerun key is already present, then just update the value to true.

6. Save and start machines.

7. Verify BI Server and Query Engines must be up and running on Kyvos Manager Dashboard.

8. Now, stop the Kyvos Manager machine from Google Console.

9. Detach old boot drive and attach new drive with same size (using similar steps performed on BI and Query Engine machine, from step 4 through 6. 

10. Update metadata value for Rerun from false to true.

11. Remove old startup script and add content from new script (km.sh).

12. Save and start Kyvos Manager machine. Start the Kyvos Manager from the path you captured at the start of this activity, verify all machines and service should be up and running.

13. At last, replace the pgconnect.sh script present inside postgres/bin with pgconnect.sh of latest alpha setup (present inside postgres/bin)