But as an alternative to writing custom scripts, you can use the Amazon CloudWatch agent procstat plugin, which continuously watches specified processes and reports their metrics to Amazon CloudWatch. In cases where you don’t want to introduce more observability logic into your application, it’s a common practice to write operating system scripts to watch for the liveness of specific processes. Applications can also expose a liveness or readiness endpoint that can be polled by external monitoring systems to check if it is running and functioning properly. One way is to instrument the application code to send heartbeats to an observer process at certain intervals. There are multiple ways to see if a service is running as expected. Critical processes and services in these instances can crash unexpectedly and when they do, it’s crucial for customers to be notified so they can maintain continued business operations.
Customers want to have visibility into processes running inside their Amazon Elastic Compute Cloud (Amazon EC2) instances.
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