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    SCF Policy Syntax

    Last updated: 2023-04-27 17:54:08
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      Policy Syntax

      You can create custom policies by using JSON syntax. SCF policies follow the CAM syntax structure and resource description method. You can check Creating Custom Policy for the direction. All resources are described in the six-segment style, as shown in the sample below:
      qcs::scf:region:uin/uin—id:namespace/namespace-name/function/function-name
      Note
      To configure the policy syntax, you also need to use the monitor APIs to get the monitoring information under the account (See sample policy).

      Sample Policies

      {	 
              "version":"2.0", 
              "statement": 
              [ 
                 { 
                    "effect":"allow", 
                    "action":
                    [
                      "scf:ListFunctions",
                      "scf:GetAccountSettings",
                      "monitor:*"
                    ], 
                    "resource":["*"]  
                 }, 
                { 
                   "effect": "allow",
                   "action": 
                   [
                      "scf:DeleteFunction",
                      "scf:CreateFunction",
                      "scf:InvokeFunction",
                      "scf:UpdateFunction",
                      "scf:GetFunctionLogs",
                      "scf:SetTrigger",
                      "scf:DeleteTrigger",
                      "scf:GetFunction",
                      "scf:ListVersion"
                  ],
                  "resource": 
                  [
                      "qcs::scf:ap-guangzhou:uin/******:namespace/default/function/Test1",
                      "qcs::scf:ap-guangzhou:uin/******:namespace/default/function/Test2"
                  ]
               }
            ] 
      }
      If the action needs to be associated with a resource, the resource can be defined as *, indicating that all resources are to be associated.
      If the action does not need to be associated with a resource, the resource needs to be defined as *.
      This sample allows the sub-account to have the operation permissions of certain functions under the root account. The resource in resource is described as a function under the root account.

      Specifying Conditions

      The access policy language allows you to specify conditions when granting permissions, such as limiting the user access source or authorization time. The list below contains supported condition operators as well as general condition keys and examples.
      Condition Operator
      Description
      Condition Name
      Example
      ip_equal
      IP is equal to
      qcs:ip
      {"ip_equal":{"qcs:ip ":"10.121.2.0/24"}}
      ip_not_equal
      IP is not equal to
      qcs:ip
      {"ip_not_equal":{"qcs:ip ":["10.121.1.0/24", "10.121.2.0/24"]}}
      date_not_equal
      Time is not equal to
      qcs:current_time
      {"date_not_equal":{"qcs:current_time":"2016-06-01T00:01:00Z"}}
      date_greater_than
      Time is later than
      qcs:current_time
      {"date_greater_than":{"qcs:current_time":"2016-06-01T00:01:00Z"}}
      date_greater_than_equal
      Time is later than or equal to
      qcs:current_time
      {"date_greater_than_equal":{"qcs:current_time":"2016-06-01T00:01:00Z"}}
      date_less_than
      Time is earlier than
      qcs:current_time
      {"date_less_than":{"qcs:current_time":"2016-06-01T 00:01:00Z"}}
      date_less_than_equal
      Time is earlier than or equal to
      qcs:current_time
      {"date_less_than":{"qcs:current_time":"2016-06-01T 00:01:00Z"}}
      date_less_than_equal
      Time is earlier than or equal to
      qcs:current_time
      {"date_less_than_equal":{"qcs:current_time":"2016-06-01T00:01:00Z"}}
      To allow access only by IPs in the 10.121.2.0/24 IP range, use the following syntax:
      "ip_equal":{"qcs:ip ":"10.121.2.0/24"}
      To allow access only by IPs 101.226.\\*\\*\\*.185 and 101.226.\\*\\*\\*.186, use the following syntax:
      "ip_equal":{
        "qcs:ip":[
          "101.226.***.185",
          "101.226.***.186"
        ]
      }

      User Policy Update

      SCF improved the preset permission policies in April 2020. The preset policies QcloudSCFFullAccess and QcloudSCFReadOnlyAccess were modified, and the QcloudAccessForScfRole policy was added for the configuration role SCF_QcsRole, as shown below:

      Preset policy QcloudSCFFullAccess

      Current permissions:
      {
          "version": "2.0",
          "statement": [
              {
                  "action":[
                      "scf:*",
                      "tag:*",
                      "cam:DescribeRoleList",
                      "cam:GetRole",
                      "cam:ListAttachedRolePolicies",
                      "apigw:DescribeServicesStatus",
                      "apigw:DescribeService",
                      "apigw:DescribeApisStatus",
                      "cmqtopic:ListTopicDetail",
                      "cmqqueue:ListQueueDetail",
                      "cmqtopic:GetSubscriptionAttributes",
                      "cmqtopic:GetTopicAttributes",
                      "cos:GetService",
                      "cos:HeadBucket",
                      "cos:HeadObject",
                      "vpc:DescribeVpcEx",
                      "vpc:DescribeSubnetEx",
                      "cls:getTopic",
                      "cls:getLogset",
                      "cls:listLogset",
                      "cls:listTopic",
                      "ckafka:List*",
                      "ckafka:Describe*",
                      "ckafka:ListInstance",
                      "monitor:GetMonitorData",
                      "monitor:DescribeBasicAlarmList",
                      "monitor:DescribeBaseMetrics",
                      "monitor:DescribeSortObjectList",
                      "monitor:DescribePolicyConditionList",
                      "cdb:DescribeDBInstances"
                  ],
                  "resource": "*",
                  "effect": "allow"
              }
          ]
      }

      Preset policy QcloudSCFReadOnlyAccess

      Current permissions:
      {
          "version": "2.0",
          "statement": [
              {
                  "action":[
                      "scf:Get*",
                      "scf:List*",
                      "ckafka:List*",
                      "ckafka:Describe*",
                      "monitor:GetMonitorData",
                      "monitor:DescribeBasicAlarmList",
                      "monitor:DescribeBaseMetrics",
                      "monitor:DescribeSortObjectList",
                      "cam:GetRole",
                      "cam:ListAttachedRolePolicies",
                      "vpc:DescribeVpcEx",
                      "vpc:DescribeSubnetEx",
                      "cls:getLogset",
                      "cls:getTopic",
                      "cls:listTopic",
                      "apigw:DescribeService",
                      "cmqtopic:GetTopicAttributes",
                      "cmqtopic:GetSubscriptionAttributes",
                      "cos:HeadBucket",
                      "cos:GetService",
                      "cos:GetObject"
                  ],
                  "resource": "*",
                  "effect": "allow"
              }
          ]
      }

      Preset policy QcloudAccessForScfRole

      Current permissions:
      {
          "version": "2.0",
          "statement": [
              {
                  "action":[
                      "cos:GetBucket*",
                      "cos:HeadBucket",
                      "cos:PutBucket*",
                      "apigw:*",
                      "cls:*",
                      "cos:List*",
                      "cos:Get*",
                      "cos:Head*",
                      "cos:OptionsObject",
                      "cmqqueue:*",
                      "cmqtopic:*",
                      "ckafka:List*",
                      "ckafka:Describe*",
                      "ckafka:AddRoute",
                      "ckafka:CreateRoute"
                  ],
                  "resource": "*",
                  "effect": "allow"
              }
          ]
      }
      The preset policy QcloudAccessForScfRole can:
      Write trigger configuration information to the bucket configuration when a COS trigger is configured.
      Read the trigger configuration information from the COS bucket.
      Read the code zip package from the bucket when the code is updated through COS.
      Create API Gateway services and APIs and publish services if an API Gateway trigger is configured.
      Create consumers if a CKafka trigger is configured.
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