Set App Gateway instance count to 1 to save cost

simonkurtz-MSFT · simonkurtz-MSFT · commit f29c21bb591c · 2025-12-17T17:54:29.000-05:00
diff --git a/infrastructure/appgw-apim-pe/main.bicep b/infrastructure/appgw-apim-pe/main.bicep
@@ -505,7 +505,11 @@ module appgwModule 'br/public:avm/res/network/application-gateway:0.7.2' = {
     sku: 'WAF_v2'
     firewallPolicyResourceId: wafPolicy.id
     enableHttp2: true
-    // Use minimal AZs for cost savings. Adjust accordingly for production workloads.
+    // Create only one instance (default is 2) for cost savings. Adjust accordingly for production workloads (use scaling, minimum instances, no maximum instances, etc.).
+    capacity: 1
+    // Use minimal AZs (1) for cost savings. Adjust accordingly for production workloads.
+    // Setting to 1 availability zone yields the following Azure Advisor message:
+    // High Impact - Deploy your Application Gateway across Availability Zones
     availabilityZones: [
       1
     ]

Original file line number	Diff line number	Diff line change
`@@ -505,7 +505,11 @@ module appgwModule 'br/public:avm/res/network/application-gateway:0.7.2' = {`
`505`	`505`	`sku: 'WAF_v2'`
`506`	`506`	`firewallPolicyResourceId: wafPolicy.id`
`507`	`507`	`enableHttp2: true`
`508`		`- // Use minimal AZs for cost savings. Adjust accordingly for production workloads.`
	`508`	`+ // Create only one instance (default is 2) for cost savings. Adjust accordingly for production workloads (use scaling, minimum instances, no maximum instances, etc.).`
	`509`	`+ capacity: 1`
	`510`	`+ // Use minimal AZs (1) for cost savings. Adjust accordingly for production workloads.`
	`511`	`+ // Setting to 1 availability zone yields the following Azure Advisor message:`
	`512`	`+ // High Impact - Deploy your Application Gateway across Availability Zones`
`509`	`513`	`availabilityZones: [`
`510`	`514`	`1`
`511`	`515`	`]`