Reduce VMSS scaling to 5 instances due to quota

Updated autoscaler and CI workflows to scale VMSS to a maximum of 5 instances instead of 6, reflecting the Azure quota limit of 20 cores (4 cores per VM). Adjusted related comments, echo statements, and parallelism settings accordingly.

Author: potatoqualitee

.github/workflows/autoscaler.yml

@@ -40,16 +40,17 @@ jobs:
         run: |
           QUEUED=${{ steps.queue.outputs.queued_jobs }}
 
-          # Each workflow has 10 jobs, scale to 6 runners for parallel execution
-          # If 1+ workflows: scale to 6 runners
+          # Each workflow has 10 jobs, scale to 5 runners for parallel execution
+          # Limited by Azure quota: 20 cores / 4 cores per VM = 5 max VMs
+          # If 1+ workflows: scale to 5 runners
           # If 0 workflows: scale to 0
 
           if [ $QUEUED -eq 0 ]; then
             TARGET=0
             echo "No active workflows - scaling to 0"
           elif [ $QUEUED -ge 1 ]; then
-            TARGET=6
-            echo "Active workflows detected - scaling to 6"
+            TARGET=5
+            echo "Active workflows detected - scaling to 5"
           fi
 
           echo "target_capacity=$TARGET" >> $GITHUB_OUTPUT

.github/workflows/ci.yml

@@ -36,21 +36,21 @@ concurrency:
 
 jobs:
   scale-up:
-    name: Scale VMSS to 6 instances
+    name: Scale VMSS to 5 instances
     runs-on: ubuntu-latest
     steps:
       - name: Azure Login
         uses: azure/login@v1
         with:
           creds: ${{ secrets.VMSS_AZURE_CREDENTIALS }}
 
-      - name: Scale VMSS to 6 instances
+      - name: Scale VMSS to 5 instances
         run: |
-          echo "Scaling VMSS to 6 instances..."
+          echo "Scaling VMSS to 5 instances (quota limit: 20 cores)..."
           az vmss scale \
             --name dbatools-runner-vmss \
             --resource-group dbatools-ci-runners \
-            --new-capacity 6
+            --new-capacity 5
 
       - name: Wait for instances to provision
         run: |
@@ -70,7 +70,7 @@ jobs:
 
     strategy:
       fail-fast: false
-      max-parallel: 6  # Maximum 6 concurrent runners
+      max-parallel: 5  # Maximum 5 concurrent runners (quota limited)
 
       matrix:
         include: