azureFirewalls

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "alertName": {
      "type": "string",
      "metadata": {
        "description": "Unique name (within the Resource Group) for the Activity log alert."
      }
    },
    "alertDescription": {
      "type": "string",
      "defaultValue": "Activity Log Alert for Azure Firewall Delete",
      "metadata": {
        "description": "Description of alert"
      }
    },
    "isEnabled": {
      "type": "bool",
      "defaultValue": true,
      "metadata": {
        "description": "Indicates whether or not the alert is enabled."
      }
    },
    "currentDateTimeUtcNow": {
      "type": "string",
      "defaultValue": "[utcNow()]",
      "metadata": {
          "description": "The current date and time using the utcNow function. Used for deployment name uniqueness"
      }
    },
    "telemetryOptOut": {
      "type": "string",
      "defaultValue": "No",
      "allowedValues": [
          "Yes",
          "No"
      ],
      "metadata": {
          "description": "The customer usage identifier used for telemetry purposes. The default value of False enables telemetry. The value of True disables telemetry."
      }
    }
  },
  "variables": {
    "pidDeploymentName": "[take(concat('pid-8bb7cf8a-bcf7-4264-abcb-703ace2fc84d-', uniqueString(resourceGroup().id, parameters('alertName'), parameters('currentDateTimeUtcNow'))), 64)]"
  },
  "resources": [
    {
      "type": "Microsoft.Insights/activityLogAlerts",
      "apiVersion": "2017-04-01",
      "name": "[parameters('alertName')]",
      "location": "Global",
      "tags": {
        "_deployed_by_amba": true
      },
      "properties": {
        "description": "[parameters('alertDescription')]",
        "scopes": [
            "[subscription().id]"
        ],
        "enabled": "[parameters('isEnabled')]",
        "condition": {
          "allOf": [
            {
              "field": "category",
              "equals": "Administrative"
            },
            {
              "field": "operationName",
              "equals": "Microsoft.Network/azureFirewalls/delete"
            },
            {
              "field": "status",
              "containsAny": ["succeeded"]
            }
          ]
        }
      }
    },
    {
      "condition": "[equals(parameters('telemetryOptOut'), 'No')]",
      "apiVersion": "2020-06-01",
      "name": "[variables('pidDeploymentName')]",
      "type": "Microsoft.Resources/deployments",
      "properties": {
          "mode": "Incremental",
          "template": {
              "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
              "contentVersion": "1.0.0.0",
              "resources": []
          }
      }
    }
  ]
}

@description('Unique name (within the Resource Group) for the Activity log alert.')
@minLength(1)
param alertName string

@description('Description of alert')
param alertDescription string = 'Activity Log Alert for Azure Firewall Delete'

@description('Indicates whether or not the alert is enabled.')
param isEnabled bool = true

@description('"The current date and time using the utcNow function. Used for deployment name uniqueness')
param currentDateTimeUtcNow string = utcNow()

@description('The customer usage identifier used for telemetry purposes. The default value of False enables telemetry. The value of True disables telemetry.')
@allowed([
  'Yes'
  'No'
])
param telemetryOptOut string = 'No'

resource symbolicname 'Microsoft.Insights/activityLogAlerts@2023-01-01-preview' = {
  name: alertName
  location: 'Global'
  tags: {
    _deployed_by_amba: 'true'
  }
  properties: {
    description: alertDescription
    scopes: [
      subscription().id
    ]
    enabled: isEnabled
    condition: {
      allOf: [
        {
          {
            field: 'category'
            equals: 'Administrative'
          }
          {
            field: 'operationName'
            equals: 'Microsoft.Network/azureFirewalls/delete'
          }
          {
            field: 'status'
            containsAny: ['succeeded']
          }
        }
      ]
    }
  }
}

var ambaTelemetryPidName = 'pid-8bb7cf8a-bcf7-4264-abcb-703ace2fc84d-${uniqueString(resourceGroup().id, alertName, currentDateTimeUtcNow)}'
resource ambaTelemetryPid 'Microsoft.Resources/deployments@2020-06-01' =  if (telemetryOptOut == 'No') {
  name: ambaTelemetryPidName
  tags: {
    _deployed_by_amba: 'true'
  }
  properties: {
    mode: 'Incremental'
    template: {
      '$schema': 'https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#'
      contentVersion: '1.0.0.0'
      resources: []
    }
  }
}

{
  "type": "Microsoft.Authorization/policyDefinitions",
  "apiVersion": "2021-06-01",
  "name": "Deploy_activitylog_Firewall_Delete",
  "properties": {
    "policyType": "Custom",
    "mode": "All",
    "displayName": "Deploy Activity Log Azure FireWall Delete Alert",
    "description": "Policy to Deploy Activity Log Azure Firewall Delete Alert",
    "metadata": {
      "version": "1.0.2",
      "category": "Network",
      "source": "https://github.com/Azure/azure-monitor-baseline-alerts/",
      "alzCloudEnvironments": [
        "AzureCloud"
      ],
      "_deployed_by_amba": "True"
    },
    "parameters": {
      "enabled": {
        "type": "String",
        "metadata": {
          "displayName": "Alert State",
          "description": "Alert state for the alert"
        },
        "allowedValues": [
          "true",
          "false"
        ],
        "defaultValue": "true"
      },
      "alertResourceGroupName": {
        "type": "String",
        "metadata": {
          "displayName": "Resource Group Name",
          "description": "Resource group the alert is placed in"
        },
        "defaultValue": "rg-amba-monitoring-001"
      },
      "alertResourceGroupTags": {
        "type": "Object",
        "metadata": {
          "displayName": "Resource Group Tags",
          "description": "Tags on the Resource group the alert is placed in"
        },
        "defaultValue": {
          "environment": "test",
          "_deployed_by_amba": true
        }
      },
      "alertResourceGroupLocation": {
        "type": "String",
        "metadata": {
          "displayName": "Resource Group Location",
          "description": "Location of the Resource group the alert is placed in"
        },
        "defaultValue": "centralus"
      },
      "MonitorDisable": {
        "type": "String",
        "metadata": {
          "displayName": "Effect",
          "description": "Tag name to disable monitoring on resource. Set to true if monitoring should be disabled"
        },
        "defaultValue": "MonitorDisable"
      }
    },
    "policyRule": {
      "if": {
        "allOf": [
          {
            "field": "type",
            "equals": "Microsoft.Network/azureFirewalls"
          },
          {
            "field": "[[concat('tags[', parameters('MonitorDisable'), ']')]",
            "notEquals": "true"
          }
        ]
      },
      "then": {
        "effect": "deployIfNotExists",
        "details": {
          "roleDefinitionIds": [
            "/providers/Microsoft.Authorization/roleDefinitions/b24988ac-6180-42a0-ab88-20f7382dd24c"
          ],
          "type": "Microsoft.Insights/activityLogAlerts",
          "name": "ActivityAzureFirewallDelete",
          "existenceScope": "resourceGroup",
          "resourceGroupName": "[[parameters('alertResourceGroupName')]",
          "deploymentScope": "subscription",
          "existenceCondition": {
            "allOf": [
              {
                "field": "Microsoft.Insights/ActivityLogAlerts/enabled",
                "equals": "[[parameters('enabled')]"
              },
              {
                "count": {
                  "field": "Microsoft.Insights/ActivityLogAlerts/condition.allOf[*]",
                  "where": {
                    "anyOf": [
                      {
                        "allOf": [
                          {
                            "field": "Microsoft.Insights/ActivityLogAlerts/condition.allOf[*].field",
                            "equals": "category"
                          },
                          {
                            "field": "Microsoft.Insights/ActivityLogAlerts/condition.allOf[*].equals",
                            "equals": "Administrative"
                          }
                        ]
                      },
                      {
                        "allOf": [
                          {
                            "field": "Microsoft.Insights/ActivityLogAlerts/condition.allOf[*].field",
                            "equals": "operationName"
                          },
                          {
                            "field": "Microsoft.Insights/ActivityLogAlerts/condition.allOf[*].equals",
                            "equals": "Microsoft.Network/azureFirewalls/delete"
                          }
                        ]
                      }
                    ]
                  }
                },
                "equals": 2
              }
            ]
          },
          "deployment": {
            "location": "northeurope",
            "properties": {
              "mode": "incremental",
              "template": {
                "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
                "contentVersion": "1.0.0.0",
                "parameters": {
                  "alertResourceGroupName": {
                    "type": "string"
                  },
                  "alertResourceGroupTags": {
                    "type": "object"
                  },
                  "alertResourceGroupLocation": {
                    "type": "string"
                  },
                  "enabled": {
                    "type": "string"
                  }
                },
                "variables": {},
                "resources": [
                  {
                    "type": "Microsoft.Resources/resourceGroups",
                    "apiVersion": "2020-10-01",
                    "name": "[[parameters('alertResourceGroupName')]",
                    "location": "[[parameters('alertResourceGroupLocation')]",
                    "tags": "[[parameters('alertResourceGroupTags')]"
                  },
                  {
                    "type": "Microsoft.Resources/deployments",
                    "apiVersion": "2019-10-01",
                    "name": "ActivityAzureFirewallDelete",
                    "resourceGroup": "[[parameters('alertResourceGroupName')]",
                    "dependsOn": [
                      "[[concat('Microsoft.Resources/resourceGroups/', parameters('alertResourceGroupName'))]"
                    ],
                    "properties": {
                      "mode": "Incremental",
                      "template": {
                        "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
                        "contentVersion": "1.0.0.0",
                        "parameters": {
                          "enabled": {
                            "type": "string"
                          },
                          "alertResourceGroupName": {
                            "type": "string"
                          }
                        },
                        "variables": {},
                        "resources": [
                          {
                            "type": "microsoft.insights/activityLogAlerts",
                            "apiVersion": "2020-10-01",
                            "name": "ActivityAzureFirewallDelete",
                            "location": "global",
                            "tags": {
                              "_deployed_by_amba": true
                            },
                            "properties": {
                              "description": "Activity Log Firewall Delete",
                              "enabled": "[[parameters('enabled')]",
                              "scopes": [
                                "[[subscription().id]"
                              ],
                              "condition": {
                                "allOf": [
                                  {
                                    "field": "category",
                                    "equals": "Administrative"
                                  },
                                  {
                                    "field": "operationName",
                                    "equals": "Microsoft.Network/azurefirewalls/delete"
                                  },
                                  {
                                    "field": "status",
                                    "containsAny": [
                                      "succeeded"
                                    ]
                                  }
                                ]
                              },
                              "parameters": {
                                "enabled": {
                                  "value": "[[parameters('enabled')]"
                                }
                              }
                            }
                          }
                        ]
                      },
                      "parameters": {
                        "enabled": {
                          "value": "[[parameters('enabled')]"
                        },
                        "alertResourceGroupName": {
                          "value": "[[parameters('alertResourceGroupName')]"
                        }
                      }
                    }
                  }
                ]
              },
              "parameters": {
                "enabled": {
                  "value": "[[parameters('enabled')]"
                },
                "alertResourceGroupName": {
                  "value": "[[parameters('alertResourceGroupName')]"
                },
                "alertResourceGroupTags": {
                  "value": "[[parameters('alertResourceGroupTags')]"
                },
                "alertResourceGroupLocation": {
                  "value": "[[parameters('alertResourceGroupLocation')]"
                }
              }
            }
          }
        }
      }
    }
  }
}

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "alertName": {
      "type": "string",
      "minLength": 1,
      "metadata": {
        "description": "Name of the alert"
      }
    },
    "alertDescription": {
      "type": "string",
      "defaultValue": "Indicates the overall health of this firewall",
      "metadata": {
        "description": "Description of alert"
      }
    },
    "targetResourceId": {
      "type": "string",
      "minLength": 1,
      "metadata": {
        "description": "List of Azure resource Ids seperated by a comma. For example - /subscriptions/00000000-0000-0000-0000-0000-00000000/resourceGroup/resource-group-name/Microsoft.compute/virtualMachines/vm-name"
      }
    },
    "targetResourceRegion": {
      "type": "string",
      "metadata": {
        "description": "Azure region in which target resources to be monitored are in (without spaces). For example: EastUS"
      }
    },
    "targetResourceType": {
      "type": "string",
      "minLength": 1,
      "metadata": {
        "description": "Resource type of target resources to be monitored."
      }
    },
    "isEnabled": {
      "type": "bool",
      "defaultValue": true,
      "metadata": {
        "description": "Specifies whether the alert is enabled"
      }
    },
    "alertSeverity": {
      "type": "int",
      "defaultValue": 0,
      "allowedValues": [
        0,
        1,
        2,
        3,
        4
      ],
      "metadata": {
        "description": "Severity of alert {0,1,2,3,4}"
      }
    },
    "operator": {
      "type": "string",
      "defaultValue": "LessThan",
      "allowedValues": [
        "Equals",
        "GreaterThan",
        "GreaterThanOrEqual",
        "LessThan",
        "LessThanOrEqual"
      ],
      "metadata": {
        "description": "Operator comparing the current value with the threshold value."
      }
    },
    "threshold": {
      "type": "string",
      "defaultValue": "90",
      "metadata": {
        "description": "The threshold value at which the alert is activated."
      }
    },
    "timeAggregation": {
      "type": "string",
      "defaultValue": "Average",
      "allowedValues": [
        "Average",
        "Minimum",
        "Maximum",
        "Total",
        "Count"
      ],
      "metadata": {
        "description": "How the data that is collected should be combined over time."
      }
    },
    "windowSize": {
      "type": "string",
      "defaultValue": "PT5M",
      "allowedValues": [
        "PT1M",
        "PT5M",
        "PT15M",
        "PT30M",
        "PT1H",
        "PT6H",
        "PT12H",
        "PT24H",
        "PT1D"
      ],
      "metadata": {
        "description": "Period of time used to monitor alert activity based on the threshold. Must be between one minute and one day. ISO 8601 duration format."
      }
    },
    "evaluationFrequency": {
      "type": "string",
      "defaultValue": "PT1M",
      "allowedValues": [
        "PT1M",
        "PT5M",
        "PT15M",
        "PT30M",
        "PT1H"
      ],
      "metadata": {
        "description": "how often the metric alert is evaluated represented in ISO 8601 duration format"
      }
    },
    "currentDateTimeUtcNow": {
      "type": "string",
      "defaultValue": "[utcNow()]",
      "metadata": {
          "description": "The current date and time using the utcNow function. Used for deployment name uniqueness"
      }
    },
    "telemetryOptOut": {
      "type": "string",
      "defaultValue": "No",
      "allowedValues": [
          "Yes",
          "No"
      ],
      "metadata": {
          "description": "The customer usage identifier used for telemetry purposes. The default value of False enables telemetry. The value of True disables telemetry."
      }
    }
  },
  "variables": {
    "pidDeploymentName": "[take(concat('pid-8bb7cf8a-bcf7-4264-abcb-703ace2fc84d-', uniqueString(resourceGroup().id, parameters('alertName'), parameters('currentDateTimeUtcNow'))), 64)]",
    "varTargetResourceId": "[split(parameters('targetResourceId'), ',')]"
  },
  "resources": [
    {
      "type": "Microsoft.Insights/metricAlerts",
      "apiVersion": "2018-03-01",
      "name": "[parameters('alertName')]",
      "location": "global",
      "tags": {
        "_deployed_by_amba": true
      },
      "properties": {
        "description": "[parameters('alertDescription')]",
        "scopes": "[variables('varTargetResourceId')]",
        "targetResourceType": "[parameters('targetResourceType')]",
        "targetResourceRegion": "[parameters('targetResourceRegion')]",
        "severity": "[parameters('alertSeverity')]",
        "enabled": "[parameters('isEnabled')]",
        "evaluationFrequency": "[parameters('evaluationFrequency')]",
        "windowSize": "[parameters('windowSize')]",
        "criteria": {
          "odata.type": "Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria",
          "allOf": [
            {
              "name": "1st criterion",
              "metricName": "FirewallHealth",
              "dimensions": [],
              "operator": "[parameters('operator')]",
              "threshold": "[parameters('threshold')]",
              "timeAggregation": "[parameters('timeAggregation')]",
              "criterionType": "StaticThresholdCriterion"
            }
          ]
        }
      }
    },
    {
      "condition": "[equals(parameters('telemetryOptOut'), 'No')]",
      "apiVersion": "2020-06-01",
      "name": "[variables('pidDeploymentName')]",
      "type": "Microsoft.Resources/deployments",
      "properties": {
          "mode": "Incremental",
          "template": {
              "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
              "contentVersion": "1.0.0.0",
              "resources": []
          }
      }
    }
  ]
}

@description('Name of the alert')
@minLength(1)
param alertName string

@description('Description of alert')
param alertDescription string = 'Indicates the overall health of this firewall'

@description('Array of Azure resource Ids. For example - /subscriptions/00000000-0000-0000-0000-0000-00000000/resourceGroup/resource-group-name/Microsoft.compute/virtualMachines/vm-name')
@minLength(1)
param targetResourceId array

@description('Azure region in which target resources to be monitored are in (without spaces). For example: EastUS')
param targetResourceRegion string

@description('Resource type of target resources to be monitored.')
@minLength(1)
param targetResourceType string

@description('Specifies whether the alert is enabled')
param isEnabled bool = true

@description('Severity of alert {0,1,2,3,4}')
@allowed([
  0
  1
  2
  3
  4
])
param alertSeverity int = 0

@description('Operator comparing the current value with the threshold value.')
@allowed([
  'Equals'
  'GreaterThan'
  'GreaterThanOrEqual'
  'LessThan'
  'LessThanOrEqual'
])
param operator string = 'LessThan'

@description('The threshold value at which the alert is activated.')
param threshold int = 90

@description('How the data that is collected should be combined over time.')
@allowed([
  'Average'
  'Minimum'
  'Maximum'
  'Total'
  'Count'
])
param timeAggregation string = 'Average'

@description('Period of time used to monitor alert activity based on the threshold. Must be between one minute and one day. ISO 8601 duration format.')
@allowed([
  'PT1M'
  'PT5M'
  'PT15M'
  'PT30M'
  'PT1H'
  'PT6H'
  'PT12H'
  'PT24H'
  'P1D'
])
param windowSize string = 'PT5M'

@description('how often the metric alert is evaluated represented in ISO 8601 duration format')
@allowed([
  'PT1M'
  'PT5M'
  'PT15M'
  'PT30M'
  'PT1H'
])
param evaluationFrequency string = 'PT1M'

@description('"The current date and time using the utcNow function. Used for deployment name uniqueness')
param currentDateTimeUtcNow string = utcNow()

@description('The customer usage identifier used for telemetry purposes. The default value of False enables telemetry. The value of True disables telemetry.')
@allowed([
  'Yes'
  'No'
])
param telemetryOptOut string = 'No'

resource metricAlert 'Microsoft.Insights/metricAlerts@2018-03-01' = {
  name: alertName
  location: 'global'
  tags: {
    _deployed_by_amba: 'true'
  }
  properties: {
    description: alertDescription
    scopes: targetResourceId
    targetResourceType: targetResourceType
    targetResourceRegion: targetResourceRegion
    severity: alertSeverity
    enabled: isEnabled
    evaluationFrequency: evaluationFrequency
    windowSize: windowSize
    criteria: {
      'odata.type': 'Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria'
      allOf: [
        {
          name: '1st criterion'
          metricName: 'FirewallHealth'
          dimensions: [[]]
          operator: operator
          threshold: threshold
          timeAggregation: timeAggregation
          criterionType: 'StaticThresholdCriterion'
        }
      ]
    }
  }
}

var ambaTelemetryPidName = 'pid-8bb7cf8a-bcf7-4264-abcb-703ace2fc84d-${uniqueString(resourceGroup().id, alertName, currentDateTimeUtcNow)}'
resource ambaTelemetryPid 'Microsoft.Resources/deployments@2020-06-01' =  if (telemetryOptOut == 'No') {
  name: ambaTelemetryPidName
  tags: {
    _deployed_by_amba: 'true'
  }
  properties: {
    mode: 'Incremental'
    template: {
      '$schema': 'https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#'
      contentVersion: '1.0.0.0'
      resources: []
    }
  }
}

{
  "type": "Microsoft.Authorization/policyDefinitions",
  "apiVersion": "2021-06-01",
  "name": "0ff72493-3822-4315-a146-8977a0963e39",
  "properties": {
    "policyType": "Custom",
    "mode": "All",
    "displayName": "Deploy AFW FirewallHealth Alert",
    "description": "Policy to Audit/Deploy AFW FirewallHealth Alert",
    "metadata": {
      "version": "1.0.0-preview",
      "category": "Network",
      "preview": true,
      "source": "https://github.com/Azure/azure-monitor-baseline-alerts/",
      "alzCloudEnvironments": [
        "AzureCloud"
      ],
      "_deployed_by_amba": "True"
    },
    "parameters": {
      "severity": {
        "type": "String",
        "metadata": {
          "displayName": "Severity",
          "description": "Severity of the Alert"
        },
        "allowedValues": [
          "0",
          "1",
          "2",
          "3",
          "4"
        ],
        "defaultValue": "0"
      },
      "windowSize": {
        "type": "String",
        "metadata": {
          "displayName": "Window Size",
          "description": "Window size for the alert"
        },
        "allowedValues": [
          "PT1M",
          "PT5M",
          "PT15M",
          "PT30M",
          "PT1H",
          "PT6H",
          "PT12H",
          "P1D"
        ],
        "defaultValue": "PT5M"
      },
      "evaluationFrequency": {
        "type": "String",
        "metadata": {
          "displayName": "Evaluation Frequency",
          "description": "Evaluation frequency for the alert"
        },
        "allowedValues": [
          "PT1M",
          "PT5M",
          "PT15M",
          "PT30M",
          "PT1H"
        ],
        "defaultValue": "PT1M"
      },
      "autoMitigate": {
        "type": "String",
        "metadata": {
          "displayName": "Auto Mitigate",
          "description": "Auto Mitigate for the alert"
        },
        "allowedValues": [
          "true",
          "false"
        ],
        "defaultValue": "true"
      },
      "enabled": {
        "type": "String",
        "metadata": {
          "displayName": "Alert State",
          "description": "Alert state for the alert"
        },
        "allowedValues": [
          "true",
          "false"
        ],
        "defaultValue": "true"
      },
      "threshold": {
        "type": "String",
        "metadata": {
          "displayName": "Threshold",
          "description": "Threshold for the alert"
        },
        "defaultValue": "90"
      },
      "effect": {
        "type": "String",
        "metadata": {
          "displayName": "Effect",
          "description": "Effect of the policy"
        },
        "allowedValues": [
          "deployIfNotExists",
          "disabled"
        ],
        "defaultValue": "deployIfNotExists"
      },
      "MonitorDisableTagName": {
        "type": "String",
        "metadata": {
          "displayName": "Monitoring disabled tag name",
          "description": "Tag name used to disable monitoring at the resource level. Set to true if monitoring should be disabled."
        },
        "defaultValue": "MonitorDisable"
      },
      "MonitorDisableTagValues": {
        "type": "Array",
        "metadata": {
          "displayName": "Monitoring disabled tag values(s)",
          "description": "Tag value(s) used to disable monitoring at the resource level. Set to true if monitoring should be disabled."
        },
        "defaultValue": [
          "true",
          "Test",
          "Dev",
          "Sandbox"
        ]
      }
    },
    "policyRule": {
      "if": {
        "allOf": [
          {
            "field": "type",
            "equals": "Microsoft.Network/azureFirewalls"
          },
          {
            "field": "[[concat('tags[', parameters('MonitorDisableTagName'), ']')]",
            "notIn": "[[parameters('MonitorDisableTagValues')]"
          }
        ]
      },
      "then": {
        "effect": "[[parameters('effect')]",
        "details": {
          "roleDefinitionIds": [
            "/providers/Microsoft.Authorization/roleDefinitions/b24988ac-6180-42a0-ab88-20f7382dd24c"
          ],
          "type": "Microsoft.Insights/metricAlerts",
          "existenceCondition": {
            "allOf": [
              {
                "field": "Microsoft.Insights/metricAlerts/criteria.Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria.allOf[*].metricNamespace",
                "equals": "Microsoft.Network/azureFirewalls"
              },
              {
                "field": "Microsoft.Insights/metricAlerts/criteria.Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria.allOf[*].metricName",
                "equals": "FirewallHealth"
              },
              {
                "field": "Microsoft.Insights/metricalerts/scopes[*]",
                "equals": "[[concat(subscription().id, '/resourceGroups/', resourceGroup().name, '/providers/Microsoft.Network/azureFirewalls/', field('fullName'))]"
              },
              {
                "field": "Microsoft.Insights/metricAlerts/enabled",
                "equals": "[[parameters('enabled')]"
              },
              {
                "field": "Microsoft.Insights/metricAlerts/evaluationFrequency",
                "equals": "[[parameters('evaluationFrequency')]"
              },
              {
                "field": "Microsoft.Insights/metricAlerts/windowSize",
                "equals": "[[parameters('windowSize')]"
              },
              {
                "field": "Microsoft.Insights/metricalerts/severity",
                "equals": "[[parameters('severity')]"
              },
              {
                "field": "Microsoft.Insights/metricAlerts/autoMitigate",
                "equals": "[[parameters('autoMitigate')]"
              },
              {
                "field": "Microsoft.Insights/metricAlerts/criteria.Microsoft-Azure-Monitor-SingleResourceMultipleMetricCriteria.allOf[*].timeAggregation",
                "equals": "Average"
              },
              {
                "field": "Microsoft.Insights/metricAlerts/criteria.Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria.allOf[*].StaticThresholdCriterion.operator",
                "equals": "LessThan"
              },
              {
                "field": "Microsoft.Insights/metricAlerts/criteria.Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria.allOf[*].StaticThresholdCriterion.threshold",
                "equals": "[[if(contains(field('tags'), '_amba-FirewallHealth-threshold-Override_'), field('tags._amba-FirewallHealth-threshold-Override_'), parameters('threshold'))]"
              }
            ]
          },
          "deployment": {
            "properties": {
              "mode": "incremental",
              "template": {
                "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
                "contentVersion": "1.0.0.0",
                "parameters": {
                  "resourceName": {
                    "type": "String",
                    "metadata": {
                      "displayName": "resourceName",
                      "description": "Name of the resource"
                    }
                  },
                  "resourceId": {
                    "type": "String",
                    "metadata": {
                      "displayName": "resourceId",
                      "description": "Resource ID of the resource emitting the metric that will be used for the comparison"
                    }
                  },
                  "severity": {
                    "type": "String"
                  },
                  "windowSize": {
                    "type": "String"
                  },
                  "evaluationFrequency": {
                    "type": "String"
                  },
                  "autoMitigate": {
                    "type": "String"
                  },
                  "enabled": {
                    "type": "String"
                  },
                  "threshold": {
                    "type": "String"
                  }
                },
                "variables": {},
                "resources": [
                  {
                    "type": "Microsoft.Insights/metricAlerts",
                    "apiVersion": "2018-03-01",
                    "name": "[[concat(parameters('resourceName'), '-FirewallHealth')]",
                    "location": "global",
                    "tags": {
                      "_deployed_by_amba": true
                    },
                    "properties": {
                      "description": "Metric Alert for Network azureFirewalls FirewallHealth",
                      "severity": "[[parameters('severity')]",
                      "enabled": "[[parameters('enabled')]",
                      "scopes": [
                        "[[parameters('resourceId')]"
                      ],
                      "evaluationFrequency": "[[parameters('evaluationFrequency')]",
                      "windowSize": "[[parameters('windowSize')]",
                      "criteria": {
                        "allOf": [
                          {
                            "name": "FirewallHealth",
                            "metricNamespace": "Microsoft.Network/azureFirewalls",
                            "metricName": "FirewallHealth",
                            "operator": "LessThan",
                            "threshold": "[[parameters('threshold')]",
                            "timeAggregation": "Average",
                            "criterionType": "StaticThresholdCriterion"
                          }
                        ],
                        "odata.type": "Microsoft.Azure.Monitor.SingleResourceMultipleMetricCriteria"
                      },
                      "autoMitigate": "[[parameters('autoMitigate')]",
                      "parameters": {
                        "severity": {
                          "value": "[[parameters('severity')]"
                        },
                        "windowSize": {
                          "value": "[[parameters('windowSize')]"
                        },
                        "evaluationFrequency": {
                          "value": "[[parameters('evaluationFrequency')]"
                        },
                        "autoMitigate": {
                          "value": "[[parameters('autoMitigate')]"
                        },
                        "enabled": {
                          "value": "[[parameters('enabled')]"
                        },
                        "threshold": {
                          "value": "[[parameters('threshold')]"
                        }
                      }
                    }
                  }
                ]
              },
              "parameters": {
                "resourceName": {
                  "value": "[[field('name')]"
                },
                "resourceId": {
                  "value": "[[field('id')]"
                },
                "severity": {
                  "value": "[[parameters('severity')]"
                },
                "windowSize": {
                  "value": "[[parameters('windowSize')]"
                },
                "evaluationFrequency": {
                  "value": "[[parameters('evaluationFrequency')]"
                },
                "autoMitigate": {
                  "value": "[[parameters('autoMitigate')]"
                },
                "enabled": {
                  "value": "[[parameters('enabled')]"
                },
                "threshold": {
                  "value": "[[if(contains(field('tags'), '_amba-FirewallHealth-threshold-Override_'), field('tags._amba-FirewallHealth-threshold-Override_'), parameters('threshold'))]"
                }
              }
            }
          }
        }
      }
    }
  }
}

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "alertName": {
      "type": "string",
      "minLength": 1,
      "metadata": {
        "description": "Name of the alert"
      }
    },
    "alertDescription": {
      "type": "string",
      "defaultValue": "Percentage of outbound SNAT ports currently in use",
      "metadata": {
        "description": "Description of alert"
      }
    },
    "targetResourceId": {
      "type": "string",
      "minLength": 1,
      "metadata": {
        "description": "List of Azure resource Ids seperated by a comma. For example - /subscriptions/00000000-0000-0000-0000-0000-00000000/resourceGroup/resource-group-name/Microsoft.compute/virtualMachines/vm-name"
      }
    },
    "targetResourceRegion": {
      "type": "string",
      "metadata": {
        "description": "Azure region in which target resources to be monitored are in (without spaces). For example: EastUS"
      }
    },
    "targetResourceType": {
      "type": "string",
      "minLength": 1,
      "metadata": {
        "description": "Resource type of target resources to be monitored."
      }
    },
    "isEnabled": {
      "type": "bool",
      "defaultValue": true,
      "metadata": {
        "description": "Specifies whether the alert is enabled"
      }
    },
    "alertSeverity": {
      "type": "int",
      "defaultValue": 1,
      "allowedValues": [
        0,
        1,
        2,
        3,
        4
      ],
      "metadata": {
        "description": "Severity of alert {0,1,2,3,4}"
      }
    },
    "operator": {
      "type": "string",
      "defaultValue": "GreaterThan",
      "allowedValues": [
        "Equals",
        "GreaterThan",
        "GreaterThanOrEqual",
        "LessThan",
        "LessThanOrEqual"
      ],
      "metadata": {
        "description": "Operator comparing the current value with the threshold value."
      }
    },
    "threshold": {
      "type": "string",
      "defaultValue": "80",
      "metadata": {
        "description": "The threshold value at which the alert is activated."
      }
    },
    "timeAggregation": {
      "type": "string",
      "defaultValue": "Average",
      "allowedValues": [
        "Average",
        "Minimum",
        "Maximum",
        "Total",
        "Count"
      ],
      "metadata": {
        "description": "How the data that is collected should be combined over time."
      }
    },
    "windowSize": {
      "type": "string",
      "defaultValue": "PT5M",
      "allowedValues": [
        "PT1M",
        "PT5M",
        "PT15M",
        "PT30M",
        "PT1H",
        "PT6H",
        "PT12H",
        "PT24H",
        "PT1D"
      ],
      "metadata": {
        "description": "Period of time used to monitor alert activity based on the threshold. Must be between one minute and one day. ISO 8601 duration format."
      }
    },
    "evaluationFrequency": {
      "type": "string",
      "defaultValue": "PT1M",
      "allowedValues": [
        "PT1M",
        "PT5M",
        "PT15M",
        "PT30M",
        "PT1H"
      ],
      "metadata": {
        "description": "how often the metric alert is evaluated represented in ISO 8601 duration format"
      }
    },
    "currentDateTimeUtcNow": {
      "type": "string",
      "defaultValue": "[utcNow()]",
      "metadata": {
          "description": "The current date and time using the utcNow function. Used for deployment name uniqueness"
      }
    },
    "telemetryOptOut": {
      "type": "string",
      "defaultValue": "No",
      "allowedValues": [
          "Yes",
          "No"
      ],
      "metadata": {
          "description": "The customer usage identifier used for telemetry purposes. The default value of False enables telemetry. The value of True disables telemetry."
      }
    }
  },
  "variables": {
    "pidDeploymentName": "[take(concat('pid-8bb7cf8a-bcf7-4264-abcb-703ace2fc84d-', uniqueString(resourceGroup().id, parameters('alertName'), parameters('currentDateTimeUtcNow'))), 64)]",
    "varTargetResourceId": "[split(parameters('targetResourceId'), ',')]"
  },
  "resources": [
    {
      "type": "Microsoft.Insights/metricAlerts",
      "apiVersion": "2018-03-01",
      "name": "[parameters('alertName')]",
      "location": "global",
      "tags": {
        "_deployed_by_amba": true
      },
      "properties": {
        "description": "[parameters('alertDescription')]",
        "scopes": "[variables('varTargetResourceId')]",
        "targetResourceType": "[parameters('targetResourceType')]",
        "targetResourceRegion": "[parameters('targetResourceRegion')]",
        "severity": "[parameters('alertSeverity')]",
        "enabled": "[parameters('isEnabled')]",
        "evaluationFrequency": "[parameters('evaluationFrequency')]",
        "windowSize": "[parameters('windowSize')]",
        "criteria": {
          "odata.type": "Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria",
          "allOf": [
            {
              "name": "1st criterion",
              "metricName": "SNATPortUtilization",
              "dimensions": [],
              "operator": "[parameters('operator')]",
              "threshold": "[parameters('threshold')]",
              "timeAggregation": "[parameters('timeAggregation')]",
              "criterionType": "StaticThresholdCriterion"
            }
          ]
        }
      }
    },
    {
      "condition": "[equals(parameters('telemetryOptOut'), 'No')]",
      "apiVersion": "2020-06-01",
      "name": "[variables('pidDeploymentName')]",
      "type": "Microsoft.Resources/deployments",
      "properties": {
          "mode": "Incremental",
          "template": {
              "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
              "contentVersion": "1.0.0.0",
              "resources": []
          }
      }
    }
  ]
}