LTS Event Source¶
You can write FunctionGraph functions to process logs subscribed to Cloud Log Service. When Cloud Log Service collects subscribed logs, you can call FunctionGraph functions by passing the collected logs as parameters (LTS sample events). FunctionGraph function code can be customized, analyzed, or loaded into other systems.
For the use of LTS log triggers, please refer to Using a LTS Trigger.
Example LTS Event¶
{
"lts": {
"data": "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"
}
}
The data value in LTS is base64 encoded.
After decoding, the content is as follows:
{"logs":"[{\"message\":\"2018-08-08/08:08:08 [WRN] [test.go:08]This is a test message.\",\"time\":1530009653059,\"host_name\":\"ecs-test\",\"ip\":\"192.168.1.1\",\"path\":\"var/log/test.log\",\"log_uid\":\"663d6930-792d-11e8-8b08-286ed488ce70\",\"line_no\":1}]","owner":"6280e170bd934f60a4d851cf5ca05129","log_group_id":"97a9d284-4448-11e8-8fa4-286ed488ce70","log_topic_id":"1a9675a7-784d-11e8-9f70-286ed488ce70"}
Parameter description¶
Parameter |
Type |
Description |
|---|---|---|
data |
String |
Base64 encoded data |
Example¶
<?php
require_once __DIR__ . '/../vendor/autoload.php';
use OTC\fg_lts_event\LTSEvent;
function initializer($context)
{
$logger = $context->getLogger();
$output = 'Initializer called for function: ' . $context->getFunctionName();
$logger->debug($output);
return $output;
}
function handler($event, $context)
{
$logger = $context->getLogger();
$logger->info('Function name: ' . $context->getFunctionName());
$ltsEvent = new LTSEvent($event);
$logger->info('Logs: ' . json_encode($ltsEvent->getLogs()));
$output = [
'logs' => $ltsEvent->getLogs(),
];
return $output;
}
Full sample code is available in the samples-doc/scratch-event-lts.
