ok, understood, To achieve this, you can create an HTTP Synthetic Monitor in Dynatrace. Start by navigating to Synthetic → Create HTTP monitor, and enter the URL of your endpoint that returns the JSON with certificate details. Once the monitor is set up, add a JavaScript validation step after the request. In this step, you’ll parse the JSON response and calculate how many days remain until the expiry date.
If the endpoint data is coming in logs instead of being accessible via a direct URL, then a Synthetic monitor won’t work because it needs an HTTP endpoint to call. In that case If the JSON snippet appears in your logs instead of an API endpoint, you can leverage Log Monitoring. The idea is to extract the expiry date from the log and turn it into a metric for alerting. First, create a log processing rule to capture the validity.to field as a custom attribute. Next, convert that date into a timestamp and calculate the difference from the current time. Once you have this value, push it as a custom metric (like, days_until_expiry). Finally, set up a custom alerting rule that triggers when days_until_expiry is less than 15
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