How do I instrument SLO burn rate with OpenTelemetry?

To instrument SLO (Service Level Objectives) burn rate with OpenTelemetry, you'll need to set up metrics to track the performance of your service against its SLOs. This process involves defining custom metrics that measure both the availability and error rates of your service, allowing you to visualize the SLO burn rate over time.

Here's a simple example of how to instrument SLO burn rate using OpenTelemetry in a PHP application:

getMeter("example-meter"); // Create a counter for tracking successful requests $successCounter = $meter->createUpDownCounter("successful_requests"); // Create a counter for tracking failed requests $failureCounter = $meter->createUpDownCounter("failed_requests"); // Function to simulate request handling function handleRequest($success) { global $successCounter, $failureCounter; if ($success) { $successCounter->add(1); } else { $failureCounter->add(1); } } // Simulate processing requests handleRequest(true); // A successful request handleRequest(false); // A failed request // You can further implement logic to calculate the burn rate // and expose these metrics through your observability stack. ?>

SLO burn rate OpenTelemetry metrics PHP application observability service level objectives instrumentation

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