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Resource Orchestration Service:ALIYUN::ACTIONTRAIL::Trail

Last Updated:Jun 16, 2026

Creates a trail that delivers events to Simple Log Service (SLS) or Object Storage Service (OSS).

Syntax

{
  "Type": "ALIYUN::ACTIONTRAIL::Trail",
  "Properties": {
    "Name": String,
    "OssBucketName": String,
    "RoleName": String,
    "OssKeyPrefix": String,
    "EventRW": String,
    "SlsProjectArn": String,
    "SlsWriteRoleArn": String
  }
}            

Properties

Property Name

Type

Required

Update Allowed

Description

Constraints

Name

String

Yes

No

The trail name.

The name must be 6 to 36 characters in length. It must start with a letter and can contain letters, digits, hyphens (-), and underscores (_).

Note

The trail name must be unique within an Alibaba Cloud account.

EventRW

String

No

Yes

The read/write type of events to deliver.

Valid values:

  • Read: read events only.

  • Write (default): write events only.

  • All: both read and write events.

OssBucketName

String

No

Yes

The name of the OSS bucket to which the trail delivers events.

The name must be 3 to 63 characters in length. It must start with a lowercase letter or a digit and can contain lowercase letters, digits, and hyphens (-).

Note
  • Make sure that you have created an OSS bucket. For more information, see Create a bucket.

  • Specify at least one of OssBucketName or SlsProjectArn.

OssKeyPrefix

String

No

Yes

The prefix of the log files stored in the OSS bucket.

The value must start with a letter and be 6 to 32 characters long. It can contain letters, numbers, hyphens (-), forward slashes (/), and underscores (_).

RoleName

String

No

Yes

The name of the service-linked role for ActionTrail.

Default value: AliyunServiceRoleForActionTrail.

SlsProjectArn

String

No

Yes

The Alibaba Cloud Resource Name (ARN) of the SLS project to which the trail delivers events.

Make sure that you have created an SLS project and a Logstore. The Logstore must be named in the actiontrail_<trail_name> format.

For more information, see Create a project and Create a standard Logstore.

Note

Specify at least one of OssBucketName or SlsProjectArn.

SlsWriteRoleArn

String

No

Yes

The ARN of the role that ActionTrail assumes to deliver management events to the SLS project.

None

Return value

Fn::GetAtt

Name: The name of the trail.

Examples

YAML format

ROSTemplateFormatVersion: '2015-09-01'
Parameters: {}
Resources:
  Role:
    Type: ALIYUN::RAM::Role
    Properties:
      RoleName: TestRole
      Policies:
        - PolicyName:
            Fn::Sub: ActionTrailPolicy-${ALIYUN::StackId}
          PolicyDocument:
            Version: '1'
            Statement:
              - Action:
                  - oss:GetBucketLocation
                  - oss:ListObjects
                  - oss:PutObject
                Resource:
                  - '*'
                Effect: Allow
              - Action:
                  - log:PostLogStoreLogs
                  - log:CreateLogstore
                  - Log:GetLogstore
                Resource:
                  - '*'
                Effect: Allow
              - Action:
                  - mns:PublishMessage
                Resource:
                  - '*'
                Effect: Allow
      AssumeRolePolicyDocument:
        Version: '1'
        Statement:
          - Action: sts:AssumeRole
            Effect: Allow
            Principal:
              Service:
                - actiontrail.aliyuncs.com
  Bucket:
    Type: ALIYUN::OSS::Bucket
    Properties:
      AccessControl: private
      BucketName: MyTestBucket
      DeletionForce: true
  SlsProject:
    Type: ALIYUN::SLS::Project
    Properties:
      Name: DemoSls
  SlsLogStore:
    Type: ALIYUN::SLS::Logstore
    DependsOn: SlsProject
    Properties:
      LogstoreName: ActiontrailTestTrail
      PreserveStorage: true
      ProjectName:
        Fn::GetAtt:
          - SlsProject
          - Name
      AppendMeta: true
      MaxSplitShard: 64
      AutoSplit: true
      EnableTracking: false
      ShardCount: 2
  Trail:
    DependsOn:
      - Role
      - Bucket
      - SlsLogStore
    Type: ALIYUN::ACTIONTRAIL::Trail
    Properties:
      SlsProjectArn:
        Fn::Sub: acs:log:${ALIYUN::Region}::project/DemoSls
      RoleName:
        Fn::GetAtt:
          - Role
          - RoleName
      EventRW: All
      OssKeyPrefix: TestFile
      OssBucketName:
        Fn::GetAtt:
          - Bucket
          - Name
      SlsWriteRoleArn:
        Fn::Sub: acs:ram::${ALIYUN::TenantId}:role/${Role.RoleName}
      Name: TestTrail
  TrailLogging:
    Type: ALIYUN::ACTIONTRAIL::TrailLogging
    Properties:
      Name:
        Fn::GetAtt:
          - Trail
          - Name
      Enable: true
Outputs:
  Name:
    Value:
      Fn::GetAtt:
        - Trail
        - Name

JSON format

{
  "ROSTemplateFormatVersion": "2015-09-01",
  "Parameters": {},
  "Resources": {
    "Role": {
      "Type": "ALIYUN::RAM::Role",
      "Properties": {
        "RoleName": "TestRole",
        "Policies": [
          {
            "PolicyName": {
              "Fn::Sub": "ActionTrailPolicy-${ALIYUN::StackId}"
            },
            "PolicyDocument": {
              "Version": "1",
              "Statement": [
                {
                  "Action": [
                    "oss:GetBucketLocation",
                    "oss:ListObjects",
                    "oss:PutObject"
                  ],
                  "Resource": [
                    "*"
                  ],
                  "Effect": "Allow"
                },
                {
                  "Action": [
                    "log:PostLogStoreLogs",
                    "log:CreateLogstore",
                    "Log:GetLogstore"
                  ],
                  "Resource": [
                    "*"
                  ],
                  "Effect": "Allow"
                },
                {
                  "Action": [
                    "mns:PublishMessage"
                  ],
                  "Resource": [
                    "*"
                  ],
                  "Effect": "Allow"
                }
              ]
            }
          }
        ],
        "AssumeRolePolicyDocument": {
          "Version": "1",
          "Statement": [
            {
              "Action": "sts:AssumeRole",
              "Effect": "Allow",
              "Principal": {
                "Service": [
                  "actiontrail.aliyuncs.com"
                ]
              }
            }
          ]
        }
      }
    },
    "Bucket": {
      "Type": "ALIYUN::OSS::Bucket",
      "Properties": {
        "AccessControl": "private",
        "BucketName": "MyTestBucket",
        "DeletionForce": true
      }
    },
    "SlsProject": {
      "Type": "ALIYUN::SLS::Project",
      "Properties": {
        "Name": "DemoSls"
      }
    },
    "SlsLogStore": {
      "Type": "ALIYUN::SLS::Logstore",
      "DependsOn": "SlsProject",
      "Properties": {
        "LogstoreName": "ActiontrailTestTrail",
        "PreserveStorage": true,
        "ProjectName": {
          "Fn::GetAtt": [
            "SlsProject",
            "Name"
          ]
        },
        "AppendMeta": true,
        "MaxSplitShard": 64,
        "AutoSplit": true,
        "EnableTracking": false,
        "ShardCount": 2
      }
    },
    "Trail": {
      "DependsOn": [
        "Role",
        "Bucket",
        "SlsLogStore"
      ],
      "Type": "ALIYUN::ACTIONTRAIL::Trail",
      "Properties": {
        "SlsProjectArn": {
          "Fn::Sub": "acs:log:${ALIYUN::Region}::project/DemoSls"
        },
        "RoleName": {
          "Fn::GetAtt": [
            "Role",
            "RoleName"
          ]
        },
        "EventRW": "All",
        "OssKeyPrefix": "TestFile",
        "OssBucketName": {
          "Fn::GetAtt": [
            "Bucket",
            "Name"
          ]
        },
        "SlsWriteRoleArn": {
          "Fn::Sub": "acs:ram::${ALIYUN::TenantId}:role/${Role.RoleName}"
        },
        "Name": "TestTrail"
      }
    },
    "TrailLogging": {
      "Type": "ALIYUN::ACTIONTRAIL::TrailLogging",
      "Properties": {
        "Name": {
          "Fn::GetAtt": [
            "Trail",
            "Name"
          ]
        },
        "Enable": true
      }
    }
  },
  "Outputs": {
    "Name": {
      "Value": {
        "Fn::GetAtt": [
          "Trail",
          "Name"
        ]
      }
    }
  }
}