问题描述
使用Azure Policy服务，对公司内部全部的订阅下的Activity Log，都需要配置导出到Log A Workspace中。
以下Policy规则可以实现此目的。
Policy内容说明
在Policy Rule部分中，选择资源的类型为 "Microsoft.Resources/subscriptions"， 效果使用 DeployIfNotExists (如果不存在，则通过修复任务进行修正。
在 existenceCondition 条件中，如果当前订阅已经启用了 diagnostic setting并且输出日志到同一个Log A workspace，表示满足Policy要求，不需要进行修正。
在 deployment 中，使用了 ARM 模板， 为订阅添加Diagnostic Setting并且所有的日志Category均启用。
因 deployment 操作，会修改诊断日志配置(属于Monitor服务)以及Log A Workspace，所以需要为这个ARM Deployment操作给与两个contributor权限， 即 roleDefinitionIds 中的内容。
使用三个输入参数 logAnalytics， effect， logsEnabled 作为Policy的判断条件。
Policy示例
{ "mode": "All", "policyRule": { "if": { "field": "type", "equals": "Microsoft.Resources/subscriptions" }, "then": { "effect": "[parameters('effect')]", "details": { "type": "Microsoft.Insights/diagnosticSettings", "deploymentScope": "subscription", "existenceScope": "subscription", "existenceCondition": { "allOf": [ { "field": "Microsoft.Insights/diagnosticSettings/logs.enabled", "equals": "[parameters('logsEnabled')]" }, { "field": "Microsoft.Insights/diagnosticSettings/workspaceId", "equals": "[parameters('logAnalytics')]" } ] }, "deployment": { "location": "chinaeast2", "properties": { "mode": "incremental", "template": { "$schema": "https://schema.management.azure.com/schemas/2018-05-01/subscriptionDeploymentTemplate.json#", "contentVersion": "1.0.0.0", "parameters": { "logAnalytics": { "type": "string" }, "logsEnabled": { "type": "string" } }, "variables": {}, "resources": [ { "name": "policy-enabled-ActivityLogs-to-logA", "type": "Microsoft.Insights/diagnosticSettings", "apiVersion": "2017-05-01-preview", "location": "Global", "properties": { "workspaceId": "[parameters('logAnalytics')]", "logs": [ { "category": "Administrative", "enabled": "[parameters('logsEnabled')]" }, { "category": "Security", "enabled": "[parameters('logsEnabled')]" }, { "category": "ServiceHealth", "enabled": "[parameters('logsEnabled')]" }, { "category": "Alert", "enabled": "[parameters('logsEnabled')]" }, { "category": "Recommendation", "enabled": "[parameters('logsEnabled')]" }, { "category": "Policy", "enabled": "[parameters('logsEnabled')]" }, { "category": "Autoscale", "enabled": "[parameters('logsEnabled')]" }, { "category": "ResourceHealth", "enabled": "[parameters('logsEnabled')]" } ] } } ], "outputs": {} }, "parameters": { "logAnalytics": { "value": "[parameters('logAnalytics')]" }, "logsEnabled": { "value": "[parameters('logsEnabled')]" } } } }, "roleDefinitionIds": [ "/providers/microsoft.authorization/roleDefinitions/749f88d5-cbae-40b8-bcfc-e573ddc772fa", "/providers/microsoft.authorization/roleDefinitions/92aaf0da-9dab-42b6-94a3-d43ce8d16293" ] } } }, "parameters": { "logAnalytics": { "type": "String", "metadata": { "displayName": "Primary Log Analytics workspace", "description": "If this workspace is outside of the scope of the assignment you must manually grant 'Log Analytics Contributor' permissions (or similar) to the policy assignment's principal ID.", "strongType": "omsWorkspace", "assignPermissions": true } }, "effect": { "type": "String", "metadata": { "displayName": "Effect", "description": "Enable or disable the execution of the policy" }, "allowedValues": [ "DeployIfNotExists", "Disabled" ], "defaultValue": "DeployIfNotExists" }, "logsEnabled": { "type": "String", "metadata": { "displayName": "Enable logs", "description": "Whether to enable logs stream to the Log Analytics workspace - True or False" }, "allowedValues": [ "True", "False" ], "defaultValue": "True" } } }
当在复杂的环境中面临问题，格物之道需：浊而静之徐清，安以动之徐生。 云中，恰是如此!
