Using an LTS Trigger

Prerequisites

• You have created a function. For details, see Creating a Function from Scratch.
• You have created an agency with the LTS FullAccess permission. For details about how to create an agency, see Configuring Agency Permissions.
• You have created a log group, for example, LogGroup1. For details, see section "Creating a Log Group".
• You have created a log stream, for example, LogTopic1. For details, see section "Creating a Log Stream".
• You have installed and configured an agent for collecting logs from servers, such as ECSs, to a specified log group. For details, see Installing the ICAgent.

Creating an LTS Trigger

1. Log in to the FunctionGraph console. In the navigation pane, choose Functions > Function List.
2. Click the function to be configured to go to the function details page.
3. Choose Configuration > Triggers and click Create Trigger.
   Figure 1 Creating a trigger
   

4. Set the following parameters:
   • Trigger Type: Select Log Tank Service (LTS).
   • Log Group: Select a log group, for example, LogGroup1.
   • Log Stream: Select a log stream, for example, LogStream1.

5. Click OK.

Configuring an LTS Event to Trigger the Function

When the size of an LTS event message exceeds 75 KB, it will be split into multiple messages by 75 KB to trigger the function.

1. Return to the FunctionGraph console. In the navigation pane, choose Functions > Function List.
2. Click the function to be configured to go to the function details page.
3. On the function details page, select a version.
4. On the Code tab page, click Test. The Configure Test Event dialog box is displayed.
5. Set the parameters described in Table 1 and click Save.

   Table 1 Test event information

   Parameter	Description
   Configure Test Event	You can choose to create a test event or edit an existing one. Use the default option Create new test event.
   Event Template	Select Log Tank Service (LTS) and use the built-in LTS event template.
   Event Name	The event name can contain 1 to 25 characters and must start with a letter and end with a letter or digit. Only letters, digits, underscores (_), and hyphens (-) are allowed. For example, lts-123test.
   Event data	The system automatically loads the built-in LTS event template, which is used in this example without modifications.

6. Click Test. The function test result is displayed.