AKS Namespace Migration + Azure DevOps DR Deployment (UK Environment)

[rishi]

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Overview

This document explains the complete process to:

• Migrate Kubernetes namespace resources
  
• Configure Azure DevOps pipeline for DR (UK)
  
• Deploy application in new AKS cluster
  
• Validate and troubleshoot issues
  

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Step 1: Navigate to Project Directory

Code:

cd /home/aks-live/24x7/AKS-Prod/sadad-POS-Queue-Consumer
ls -ltr

Identify the folder:
pos-queue-consumer-fileshare/

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Step 2: Go to Fileshare Directory

Code:

cd pos-queue-consumer-fileshare/
ls -ltr

Important files:
[list]
[*]pos-queue-consumer-storage-secret.yaml
[*]azure-file-pvc.yaml
[*]azure-file-sc.yaml
[/list]

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Step 3: Update Storage Secret

Code:

vi pos-queue-consumer-storage-secret.yaml

Update:
data:
  azurestorageaccountkey: <BASE64_KEY>
  azurestorageaccountname: <BASE64_NAME>

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Step 4: Verify Base64 Values

Code:

echo "<value>" | base64 -d

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Step 5: Create Namespace

Code:

kubectl create ns sadad-online-pos-queue-consumer

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Step 6: Apply Resources (Order Important)

Code:

1. Apply Secret
kubectl apply -f pos-queue-consumer-storage-secret.yaml

2. Apply Storage Class & PVC
kubectl apply -f azure-file-sc.yaml -f  azure-file-pvc.yaml

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Step 7: Apply Remaining Secrets

Code:

cd ..

kubectl apply -f az-repo-dev-secret.yaml

kubectl apply -f pos-queue-consumer-env-azure-secrets.yaml \
              -f pos-queue-consumer-env-config-secrets.yaml \
              -f pos-queue-consumer-env-email-secrets.yaml \
              -f sadad-online-pos-queue-consumer-secrets.yaml

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Step 8: Azure DevOps – Download Deployment File

Go to:
Repos → Sadad-POS-Queue-Consumer → manifests

Download:
deploy-live.yaml

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Step 9: Create UK Deployment File

Rename:
deploy-live.yaml → deploy-live-uk.yaml

Update DB:
- name: DB_HOST
  value: <UK_DB_IP>

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Step 10: Upload File to Repo

Upload to:
manifests/

Commit message:
Added deploy-live-uk for DR UK

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Step 11: Clone Release Pipeline

Go to:
Pipelines → Releases → sadad-pos-queue-consumer

• Click Edit
  
• Clone Live Stage
  

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Step 12: Rename Stage

Sadad-Live-Pos-Queue-Consumer-UK

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Step 13: Configure Kubernetes Connection

Update:

• Subscription: Sadad - Azure
  
• Cluster: Sadad-Online-UK-AKS
  
• Namespace: sadad-online-pos-queue-consumer
  
• Service Connection: sadad-online-pos-queue-consumer-uk
  

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Step 14: Update Deployment File Path

$(System.DefaultWorkingDirectory)/Sadad-POS-Queue-Consumer/drop/deploy-live-uk.yaml

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Step 15: Update Print Tag Script

Replace:
deploy-live.yaml → deploy-live-uk.yaml

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Step 16: Run Pipeline

After commit → pipeline triggers automatically

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Step 17: Deploy Release

Go to Releases → Select new release
Click:

• Deploy
  
• Approve
  

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Step 18: Verify Deployment

kubectl get pods -n sadad-online-pos-queue-consumer
kubectl logs <pod>

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Common Issue: Volume Mount Error

Error:
MountVolume failed: No such file or directory

Fix:
az storage share create \
  --name pos-queue-logs \
  --account-name <storage_account> \
  --account-key <key>

Then restart pod:
kubectl delete pod <pod-name>

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Final Validation

kubectl get pods

Expected:
Running

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Summary

1. Setup namespace
   
2. Apply secrets + PVC
   
3. Modify deployment YAML
   
4. Update Azure DevOps pipeline
   
5. Deploy via release
   
6. Approve and validate
   

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Best Practices

• Always clone existing pipeline
  
• Verify secrets before deployment
  
• Keep naming consistent across environments
  
• Validate storage before pod start
  

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Migration Completed Successfully