# 消息通知服务 SMN 云服务在IAM预置了常用授权项，称为系统身份策略。如果IAM系统身份策略无法满足授权要求，管理员可以根据各服务支持的授权项，创建IAM自定义身份策略来进行精细的访问控制，IAM自定义身份策略是对系统身份策略的扩展和补充。 除IAM服务外，[Organizations](https://support.huaweicloud.com/productdesc-organizations/org_01_0011.html)服务中的[服务控制策略](https://support.huaweicloud.com/usermanual-organizations/org_03_0065.html)（Service Control Policy，以下简称SCP）也可以使用这些授权项元素设置访问控制策略。 SCP不直接进行授权，只划定权限边界。将SCP绑定到组织单元或者成员账号时，并没有直接对组织单元或成员账号授予操作权限，而是规定了成员账号或组织单元包含的成员账号的授权范围。IAM身份策略授予权限的有效性受SCP限制，只有在SCP允许范围内的权限才能生效。 IAM服务与Organizations服务在使用这些元素进行访问控制时，存在着一些区别，详情请参见：[IAM服务与Organizations服务权限访问控制的区别](https://support.huaweicloud.com/organizations_faq/org_06_0004.html)。 本章节介绍IAM服务身份策略授权场景中自定义身份策略和组织服务中SCP使用的元素，这些元素包含了操作（Action）、资源（Resource）和条件（Condition）。 - 如何使用这些元素编辑IAM自定义身份策略，请参考[创建自定义身份策略](https://support.huaweicloud.com/usermanual-iam5/iam_01_0917.html)。 - 如何使用这些元素编辑SCP自定义策略，请参考[创建SCP](https://support.huaweicloud.com/usermanual-organizations/org_03_0035.html)。 #### 操作（Action） 操作（Action）即为身份策略中支持的授权项。 - "访问级别"列描述如何对操作进行分类（List、Read和Write等）。此分类可帮助您了解在身份策略中相应操作对应的访问级别。 - "资源类型"列指每个操作是否支持资源级权限。 - 资源类型支持通配符号\*表示所有。如果此列没有值（-），则必须在身份策略语句的Resource元素中指定所有资源类型（"\*"）。 - 如果该列包含资源类型，则必须在具有该操作的语句中指定该资源的URN。 - 资源类型列中必需资源在表中用星号（\*）标识，表示使用此操作必须指定该资源类型。 关于SMN定义的资源类型的详细信息请参见[资源类型（Resource）]。 - "条件键"列包括了可以在身份策略语句的Condition元素中支持指定的键值。 - 如果该授权项资源类型列存在值，则表示条件键仅对列举的资源类型生效。 - 如果该授权项资源类型列没有值（-），则表示条件键对整个授权项生效。 - 如果此列条件键没有值（-），表示此操作不支持指定条件键。 关于SMN定义的条件键的详细信息请参见[条件（Condition）]。 - "别名"列包括了可以在身份策略中配置的策略授权项。通过这些授权项，可以控制支持策略授权的API访问。详细信息请参见[身份策略兼容性说明](https://support.huaweicloud.com/iam5_faq/iam_01_1103.html)。 您可以在身份策略语句的Action元素中指定以下SMN的相关操作。 表1SMN支持的授权项 | 授权项 | 描述 | 访问级别 | 资源类型（\*为必须） | 条件键 | 别名 | |:---|:---|:---|:---|:---|:---| | smn:topic:create | 授予创建主题的权限。 | Write | topic \* | - | - | | smn:topic:create | 授予创建主题的权限。 | Write | - | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:RequestTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:TagKeys](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - | | smn:topic:listTopic | 授予查询主题列表的权限。 | List | topic \* | - | - smn:topic:list | | smn:topic:listTopic | 授予查询主题列表的权限。 | List | - | [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:list | | smn:topic:updateTopic | 授予更新主题信息的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:update | | smn:topic:get | 授予查询主题详情的权限。 | Read | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:list | | smn:topic:delete | 授予删除主题的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - | | smn:topic:listAttributes | 授予查询主题策略的权限。 | List | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:list | | smn:topic:deleteAttribute | 授予删除主题策略的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:update | | smn:topic:updateAttribute | 授予更新主题策略的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:update | | smn:topic:updateAttribute | 授予更新主题策略的权限。 | Write | - | - [smn:TargetOrgPath] - [smn:TargetOrgId] - [smn:TargetAccountId] | - smn:topic:update | | smn:topic:subscribe | 授予主题下创建订阅的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:update | | smn:topic:subscribe | 授予主题下创建订阅的权限。 | Write | - | - [smn:Protocol] - [smn:Endpoint] | - smn:topic:update | | smn:topic:listSubscriptionsByTopic | 授予查询指定主题的订阅列表的权限。 | List | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:list | | smn:topic:listSubscriptions | 授予查询所有主题的订阅列表的权限。 | List | topic \* | - | - smn:topic:list | | smn:topic:deleteSubscription | 授予删除指定主题下的订阅的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:update | | smn:topic:updateSubscription | 授予更新指定主题下的订阅的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:update | | smn:topic:publish | 授予发送消息的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - | | smn:template:create | 授予创建模板的权限。 | Write | template \* | - | - | | smn:template:listTemplates | 授予查询模板列表的权限。 | List | template \* | - | - smn:template:list | | smn:template:update | 授予修改模板的权限。 | Write | template \* | - | - | | smn:template:get | 授予查询模板详情的权限。 | Read | template \* | - | - smn:template:list | | smn:template:delete | 授予删除模板的权限。 | Write | template \* | - | - | | smn:tag:create | 授予指定主题创建标签的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - | | smn:tag:create | 授予指定主题创建标签的权限。 | Write | - | - [g:RequestTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:TagKeys](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - | | smn:tag:delete | 授予删除主题标签的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:tag:update | | smn:tag:delete | 授予删除主题标签的权限。 | Write | - | - [g:RequestTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:TagKeys](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:tag:update | | smn:tag:batchModify | 授予批量修改主题标签的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:tag:update | | smn:tag:batchModify | 授予批量修改主题标签的权限。 | Write | - | - [g:RequestTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:TagKeys](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:tag:update | | smn:tag:list | 授予查询主题标签的权限。 | Read | topic \* | [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - | | smn:topic:createLogTank | 授予为主题关联日志组和日志流的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - | | smn:topic:listLogTank | 授予查询主题的日志组和日志流的权限。 | List | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:list | | smn:topic:updateLogTank | 授予更新主题的日志组和日志流的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:update | | smn:topic:deleteLogTank | 授予解除主题的日志组和日志流关系的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - smn:topic:update | | smn:topic:createKmsKey | 授予为主题关联KMS密钥的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - | | smn:topic:getKmsKey | 授予查询主题的KMS密钥的权限。 | List | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - | | smn:topic:updateKmsKey | 授予更新主题的KMS密钥的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - | | smn:topic:deleteKmsKey | 授予删除主题的KMS密钥的权限。 | Write | topic \* | - [g:EnterpriseProjectId](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) - [g:ResourceTag/\](https://support.huaweicloud.com/usermanual-iam5/iam_01_1287.html) | - | | smn:topic:createNotifyPolicy | 授予创建通知策略的权限 | Write | topic \* | - | - | | smn:topic:updateNotifyPolicy | 授予修改通知策略的权限 | Write | topic \* | - | - | | smn:topic:getNotifyPolicy | 授予查询通知策略的权限 | Read | topic \* | - | - | | smn:topic:deleteNotifyPolicy | 授予删除通知策略的权限 | Write | topic \* | - | - | | smn:application:create | 授予创建应用的权限。 | Write | application \* | - | - | | smn:application:delete | 授予删除应用的权限。 | Write | application \* | - | - | | smn:application:list | 授予查询应用的权限。 | List | application \* | - | - | | smn:application:get | 授予查询应用详情的权限。 | Read | application \* | - | - | | smn:application:publish | 授予发布应用下消息的权限。 | Write | application \* | - | - | | smn:application:createPlatform | 授予创建平台的权限。 | Write | application \* | - | - | | smn:application:deletePlatform | 授予删除平台的权限。 | Write | application \* | - | - | | smn:application:updatePlatform | 授予更新平台的权限。 | Write | application \* | - | - | | smn:application:listPlatform | 授予查询平台列表的权限。 | List | application \* | - | - | | smn:application:getPlatform | 授予查询平台详情的权限。 | Read | application \* | - | - | | smn:subscriptionUser:create | 授予创建订阅用户的权限。 | Write | subscription_user \* | - | - | | smn:subscriptionUser:create | 授予创建订阅用户的权限。 | Write | - | - [smn:Protocol] - [smn:Endpoint] | - | | smn:subscriptionUser:delete | 授予删除订阅用户的权限。 | Write | subscription_user \* | - | - | | smn:subscriptionUser:update | 授予更新订阅用户的权限。 | Write | subscription_user \* | - | - | | smn:subscriptionUser:list | 授予查询订阅用户列表的权限。 | List | subscription_user \* | - | - | SMN的API通常对应着一个或多个授权项。[表2]展示了API与授权项的关系，以及该API需要依赖的授权项。 表2API与授权项的关系 | API | 对应的授权项 | 依赖的授权项 | |:---|:---|:---| | POST /v2/{project_id}/notifications/topics | smn:topic:create | - | | GET /v2/{project_id}/notifications/topics | smn:topic:listTopic | - | | PUT /v2/{project_id}/notifications/topics/{topic_urn} | smn:topic:updateTopic | - | | GET /v2/{project_id}/notifications/topics/{topic_urn} | smn:topic:get | - | | DELETE /v2/{project_id}/notifications/topics/{topic_urn} | smn:topic:delete | - | | GET /v2/{project_id}/notifications/topics/{topic_urn}/attributes | smn:topic:listAttributes | - | | DELETE /v2/{project_id}/notifications/topics/{topic_urn}/attributes | smn:topic:deleteAttribute | - | | PUT /v2/{project_id}/notifications/topics/{topic_urn}/attributes/{name} | smn:topic:updateAttribute | - | | DELETE /v2/{project_id}/notifications/topics/{topic_urn}/attributes/{name} | smn:topic:deleteAttribute | - | | POST /v2/{project_id}/notifications/topics/{topic_urn}/subscriptions | smn:topic:subscribe | - | | GET /v2/{project_id}/notifications/topics/{topic_urn}/subscriptions | smn:topic:listSubscriptionsByTopic | - | | PUT /v2/{project_id}/notifications/topics/{topic_urn}/subscriptions/{subscription_urn} | smn:topic:updateSubscription | - | | DELETE /v2/{project_id}/notifications/subscriptions/{subscription_urn} | smn:topic:deleteSubscription | - | | DELETE /v2/{project_id}/notifications/subscriptions | smn:topic:deleteSubscription | - | | DELETE /v2/{project_id}/notifications/topics/{topic_urn}/subscriptions/{subscription_urn} | smn:topic:deleteSubscription | - | | DELETE /v2/{project_id}/notifications/topics/{topic_urn}/subscriptions | smn:topic:deleteSubscription | - | | GET /v2/{project_id}/notifications/subscriptions | smn:topic:listSubscriptions | - | | POST /v2/{project_id}/notifications/topics/{topic_urn}/publish | smn:topic:publish | - | | POST /v2/{project_id}/notifications/message_template | smn:template:create | - | | GET /v2/{project_id}/notifications/message_template | smn:template:listTemplates | - | | PUT /v2/{project_id}/notifications/message_template/{message_template_id} | smn:template:update | - | | GET /v2/{project_id}/notifications/message_template/{message_template_id} | smn:template:get | - | | DELETE /v2/{project_id}/notifications/message_template/{message_template_id} | smn:template:delete | - | | POST /v2/{project_id}/{resource_type}/{resource_id}/tags | smn:tag:create | - | | GET /v2/{project_id}/{resource_type}/{resource_id}/tags | smn:tag:list | - | | POST /v2/{project_id}/{resource_type}/{resource_id}/tags/action | smn:tag:batchModify | - smn:tag:create - smn:tag:delete | | DELETE /v2/{project_id}/{resource_type}/{resource_id}/tags/{key} | smn:tag:delete | - | | GET /v2/{project_id}/{resource_type}/tags | smn:tag:list | - | | POST /v2/{project_id}/{resource_type}/resource_instances/action | smn:tag:list | - | | GET /v2/{project_id}/notifications/topics/{topic_urn}/logtanks | smn:topic:listLogTank | - | | POST /v2/{project_id}/notifications/topics/{topic_urn}/logtanks | smn:topic:createLogTank | - | | PUT /v2/{project_id}/notifications/topics/{topic_urn}/logtanks/{logtank_id} | smn:topic:updateLogTank | - | | DELETE /v2/{project_id}/notifications/topics/{topic_urn}/logtanks/{logtank_id} | smn:topic:deleteLogTank | - | | POST /v2/{project_id}/notifications/subscriptions/filter_polices | smn:topic:updateSubscription | - | | PUT /v2/{project_id}/notifications/subscriptions/filter_polices | smn:topic:updateSubscription | - | | DELETE /v2/{project_id}/notifications/subscriptions/filter_polices | smn:topic:updateSubscription | - | | POST /v2/{project_id}/notifications/topics/{topic_urn}/subscriptions/from-subscription-users | smn:topic:subscribe | - | | POST /v2/{project_id}/notifications/topics/{topic_urn}/notify-policy | smn:topic:createNotifyPolicy | smn:topic:listSubscriptionsByTopic | | PUT /v2/{project_id}/notifications/topics/{topic_urn}/notify-policy/{notify_policy_id} | smn:topic:updateNotifyPolicy | smn:topic:listSubscriptionsByTopic | | GET /v2/{project_id}/notifications/topics/{topic_urn}/notify-policy | smn:topic:getNotifyPolicy | - | | DELETE /v2/{project_id}/notifications/topics/{topic_urn}/notify-policy/{notify_policy_id} | smn:topic:deleteNotifyPolicy | - | | GET /v2/{project_id}/notifications/topics/{topic_urn}/statistics | smn:topic:get | - | | POST /v2/{project_id}/notifications/topics/{topic_urn}/kms | smn:topic:createKmsKey | smn:topic:get | | PUT /v2/{project_id}/notifications/topics/{topic_urn}/kms/{id} | smn:topic:updateKmsKey | - smn:topic:get - smn:topic:getKmsKey | | GET /v2/{project_id}/notifications/topics/{topic_urn}/kms | smn:topic:getKmsKey | smn:topic:get | | DELETE /v2/{project_id}/notifications/topics/{topic_urn}/kms/{id} | smn:topic:deleteKmsKey | - smn:topic:get - smn:topic:getKmsKey | | - | smn:application:create | - | | - | smn:application:delete | - | | - | smn:application:list | - | | - | smn:application:get | - | | - | smn:application:publish | - | | - | smn:application:createPlatform | - | | - | smn:application:deletePlatform | - | | - | smn:application:updatePlatform | - | | - | smn:application:listPlatform | - | | - | smn:application:getPlatform | - | | POST /v2/{domain_id}/subscription-users | smn:subscriptionUser:create | - | | DELETE /v2/{domain_id}/subscription-users/{id} | smn:subscriptionUser:delete | - | | PUT /v2/{domain_id}/subscription-users/{id} | smn:subscriptionUser:update | - | | GET /v2/{domain_id}/subscription-users | smn:subscriptionUser:list | - | #### 资源类型（Resource） 资源类型（Resource）用于定义身份策略生效的资源范围。如[表3]中某项操作已指定了对应的资源类型，则在包含该操作的身份策略语句中选择填写对应资源的URN时，身份策略仅对该指定资源生效；未填写对应资源的URN时，身份策略将对指定资源类型下所有资源生效；如未指定资源类型，Resource默认取值为"\*"，身份策略将作用于所有资源。此外，您也可在身份策略中设置条件，进一步精细化限定资源类型。 SMN定义了以下可以在自定义身份策略的Resource元素中使用的资源类型。 表3SMN支持的资源类型 | 资源类型 | URN | |:---|:---| | application | smn::\:application:\ | | topic | smn:\:\:topic:\ | | subscription_user | smn::\:subscription_user:\ | | template | smn:\:\:template:\ | #### 条件（Condition） **条件键概述** 条件（Condition）是身份策略生效的特定条件，包括[条件键](https://support.huaweicloud.com/usermanual-iam5/iam_01_0934.html)和[运算符](https://support.huaweicloud.com/usermanual-iam5/iam_01_0934.html)。 - 条件键表示身份策略语句的Condition元素中的键值。根据适用范围，分为全局级条件键和服务级条件键。 - 全局级条件键（前缀为g:）适用于所有操作，在鉴权过程中，云服务不需要提供用户身份信息，系统将自动获取并鉴权。详情请参见：[全局条件键](https://support.huaweicloud.com/usermanual-iam5/iam_01_0934.html)。 - 服务级条件键（前缀通常为服务缩写，如smn:）仅适用于对应服务的操作，详情请参见[表4]。 - 单值/多值表示API调用时请求中与条件关联的值数。单值条件键在API调用时的请求中最多包含一个值，多值条件键在API调用时请求可以包含多个值。例如：g:SourceVpce是单值条件键，表示仅允许通过某个VPC终端节点发起请求访问某资源，一个请求最多包含一个VPC终端节点ID值。g:TagKeys是多值条件键，表示请求中携带的所有标签的key组成的列表，当用户在调用API请求时传入标签可以传入多个值。 - 运算符与条件键、条件值一起构成完整的条件判断语句，当请求信息满足该条件时，身份策略才能生效。支持的运算符请参见：[运算符](https://support.huaweicloud.com/usermanual-iam5/iam_01_0934.html)。 **SMN支持的服务级条件键** SMN定义了以下可以在自定义身份策略的Condition元素中使用的条件键，您可以使用这些条件键进一步细化身份策略语句应用的条件。 表4SMN支持的服务级条件键 | 服务级条件键 | 类型 | 单值/多值 | 说明 | |:---|:---|:---|:---| | smn:TargetOrgPath | string | 单值 | 主题策略授权的组织路径。 | | smn:TargetOrgId | string | 单值 | 主题策略授权的组织ID。 | | smn:TargetAccountId | string | 单值 | 主题策略授权的账号ID。 | | smn:Protocol | string | 单值 | 订阅终端协议。 | | smn:Endpoint | string | 单值 | 订阅终端地址。 |