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The following sections explain the Disaster Recovery model in detail.

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1. Scale down the Runtime and Listener deployments in the PROD environment by running two commands in the following formats.

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   kubectl scale --replicas=0 deployment <Release Name>-ac-runtime -n <namespace>

   
   

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   kubectl scale --replicas=0 deployment <Release Name>-ac-listener -n <namespace>

   
   

2. Pause Scheduler in the PROD environment.

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   https://<webapp_Gateway_URL>/event/schedulerservice?_dc=1670999141899&query=Pause&page=1&start=0&limit=25

   
   

3. Scale down Rabbit MQ statefulset in the PROD environment.
   
   

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   kubectl scale --replicas=0 statefulset <Release Name>-ac-rabbitmq -n <namespace>

   
   

4. Scale down Rabbit MQ statefulset in the DR environment


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   kubectl scale --replicas=0 statefulset <Release Name>-ac-rabbitmq -n <namespace>

   
   

5. Initiate failover for the storage account using the following steps:

   Info
   >> Initiating failover is required only when the Azure File Share is not accessible due to any failure. >> As per Microsoft guidelinesdocumentation, the time it takes to failover after initiation can vary though typically less than one hour.

   1. Login into your Azure Portal.

   2. Go to the Storage Account being used in the PVC of Prod environment.

   3. Within that storage account go to Data Management > Redundancy section.

   4. Click Prepare for failover and follow the instruction given on the screen. The failover process starts.

   5. Once the Account Failover process completes the data from secondary region will be accessible from the existing endpoint of the storage account.

6. Copy the web/repository folder from PROD to DR environment.

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   ./azcopy sync "https://[account].file.core.windows.net/[PVC]/web/repository/?[SAS]" "https://[account].file.core.windows.net/[PVC]/web/repository/?[SAS]" --recursive=true

   For example:
./azcopy sync "https://fxxxxxxxxxxxxxxxxxxxxx1b6a.file.core.windows.net/pvc-e38eca50-xxxx-xxxx-xxxx-828efd6d49df/web/repository/?sv=2021-06-08&ss=bfqt&srt=sco&sp=rwdlacupiytfx&se=2024-03-06T01:18:24Z&st=2023-03-05T17:18:24Z&spr=https,http&sig=VxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxaXBmSAKm4%3D" "https://fxxxxxxxxxxxxxxxxxxx3aeb.file.core.windows.net/pvc-1a6f1c1b-xxxx-xxxx-xxxx-44ff485d707f/web/repository/?sv=2021-06-08&ss=bfqt&srt=sco&sp=rwdlacupiytfx&se=2024-03-06T01:25:19Z&st=2023-03-05T17:25:19Z&spr=https,http&sig=vxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxGazWA%3D" --recursive=true

7. Copy the recovery folder from PROD to DR environment.

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   ./azcopy sync "https://[account].file.core.windows.net/[PVC]/recovery/?[SAS]" "https://[account].file.core.windows.net/[PVC]/recovery/?[SAS]" --recursive=true

   For example:
   ./azcopy sync "https://fxxxxxxxxxxxxxxxxxxxxx1b6a.file.core.windows.net/pvc-e38eca50-xxxx-xxxx-xxxx-828efd6d49df/recovery/?sv=2021-06-08&ss=bfqt&srt=sco&sp=rwdlacupiytfx&se=2024-03-06T01:18:24Z&st=2023-03-05T17:18:24Z&spr=https,http&sig=VxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxaXBmSAKm4%3D" "https://fxxxxxxxxxxxxxxxxxxx3aeb.file.core.windows.net/pvc-1a6f1c1b-xxxx-xxxx-xxxx-44ff485d707f/recovery/?sv=2021-06-08&ss=bfqt&srt=sco&sp=rwdlacupiytfx&se=2024-03-06T01:25:19Z&st=2023-03-05T17:25:19Z&spr=https,http&sig=vxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxGazWA%3D" --recursive=true

8. Copy the reprocessing folder from PROD to DR environment

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   ./azcopy sync "https://[account].file.core.windows.net/[PVC]/reprocessing/?[SAS]" "https://[account].file.core.windows.net/[PVC]/reprocessing/?[SAS]" --recursive=true

   For Example:
   ./azcopy sync "https://fxxxxxxxxxxxxxxxxxxxxx1b6a.file.core.windows.net/pvc-e38eca50-xxxx-xxxx-xxxx-828efd6d49df/web/reprocessing/?sv=2021-06-08&ss=bfqt&srt=sco&sp=rwdlacupiytfx&se=2024-03-06T01:18:24Z&st=2023-03-05T17:18:24Z&spr=https,http&sig=VxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxaXBmSAKm4%3D" "https://fxxxxxxxxxxxxxxxxxxx3aeb.file.core.windows.net/pvc-1a6f1c1b-xxxx-xxxx-xxxx-44ff485d707f/reprocessing/?sv=2021-06-08&ss=bfqt&srt=sco&sp=rwdlacupiytfx&se=2024-03-06T01:25:19Z&st=2023-03-05T17:25:19Z&spr=https,http&sig=vxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxGazWA%3D" --recursive=true

9. Copy the Rabbitmq PVC content from PROD to DR environment

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   ./azcopy sync "https://[account].file.core.windows.net/[PVC]/?[SAS]" "https://[account].file.core.windows.net/[PVC]/?[SAS]" --recursive=true --mirror-mode=true

   For Example:
   ./azcopy sync "https://fxxxxxxxxxxxxxxxxxxxxx1b6a.file.core.windows.net/pvc-ef345e9d-xxxx-xxxx-xxxx-54e38de9cbd1/?sv=2021-06-08&ss=bfqt&srt=sco&sp=rwdlacupiytfx&se=2024-03-06T01:18:24Z&st=2023-03-05T17:18:24Z&spr=https,http&sig=VxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxaXBmSAKm4%3D" "https://fxxxxxxxxxxxxxxxxxxx3aeb.file.core.windows.net/pvc-4a47fa22-xxxx-xxxx-xxxx-f6538dfff1a7/?sv=2021-06-08&ss=bfqt&srt=sco&sp=rwdlacupiytfx&se=2024-03-06T01:25:19Z&st=2023-03-05T17:25:19Z&spr=https,http&sig=vxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxGazWA%3D" --recursive=true --mirror-mode=true

10. Scale up RabbitMQ statefulset in the DR environment.

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    kubectl scale --replicas=1 statefulset <Release Name>-ac-rabbitmq -n <namespace>

    
    

11. Scale up Listener in the DR environment.

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    kubectl scale --replicas=1 deployment <Release Name>-ac-runtime -n <namespace>

    
    

12. Resume Scheduler in the DR environment.
    https://<webapp_Gateway_URL>/event/schedulerservice?_dc=1670999141899&query=Resume&page=1&start=0&limit=25
13. Update DNS record to route all request to DR environment

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