Prerequisites

• You have created a function on FunctionGraph. For details, see Creating and Initializing a Function.
• You have created a log group, for example, LogGroup1. For details, see Creating a Log Group.
• You have created a log stream, for example, LogTopic1. For details, see 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, and choose Functions > Function List in the navigation pane.
2. Click the HelloWorld function.
3. On the displayed function details page, click the Triggers tab.
4. Click Create Trigger.
5. Set the following parameters:
   • Trigger Type: Select Log Tank Service (LTS).
   • Log Group: Select a log group, for example, LogGroup1.
   • Log Topic: Select a log topic, for example, LogTopic1.

6. Click OK.

Configuring an LTS Event to Trigger the Function

1. Log in to the FunctionGraph console, and choose Functions > Function List in the navigation pane.
2. Click the HelloWorld function.
3. On the displayed function details page, select a version and choose Select test event > Configure test event.
4. 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 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.

   

   The event template is as follows:

   {
       "lts": {
           "data": "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"
       }
   }

5. Click Test. The function test result is displayed, as shown in Figure 1.
   Figure 1 Test result