aca-replica-count.json

{
  "properties": {
    "displayName": "Azure Container Apps container replica count limits",
    "policyType": "Custom",
    "mode": "Indexed",
    "description": "This policy enforces limits for the minimum and maximum number of replicas for Azure Container Apps.",
    "metadata": {
      "version": "1.0.0",
      "category": "Azure Container Apps"
    },
    "parameters": {
      "minReplicas": {
        "type": "integer",
        "metadata": {
          "displayName": "Min allowed replicas",
          "description": "Specifies the minimum number of container replicas for the Azure Container App"
        },
        "defaultValue": 0
      },
      "maxReplicas": {
        "type": "integer",
        "metadata": {
          "displayName": "Max allowed replicas",
          "description": "Specifies the maximum number of container replicas for the Azure Container App"
        },
        "defaultValue": 30
      },
      "effect": {
        "type": "String",
        "metadata": {
          "displayName": "Effect",
          "description": "Enable or disable the execution of the policy"
        },
        "allowedValues": [
          "Audit",
          "Deny",
          "Disabled"
        ],
        "defaultValue": "Audit"
      }
    },
    "policyRule": {
      "if": {
        "allOf": [{
            "field": "type",
            "equals": "Microsoft.App/containerApps"
          },
          {
            "anyOf": [{
              "field": "Microsoft.App/containerApps/template.scale.minReplicas",
              "less": "[parameters('MinReplicas')]"
            }, {
              "field": "Microsoft.App/containerApps/template.scale.maxReplicas",
              "greater": "[parameters('MaxReplicas')]"
            }]
          }
        ]
      },
      "then": {
        "effect": "[parameters('effect')]"
      }
    }
  }
}