F5 – Health Monitors and Using Vendors API or Keepalive Page

Monitoring a specific API endpoint like “http://cordero.me/api/gator/status” instead of the root website can have several advantages in the context of F5 Health Monitors:

Specificity: The API endpoint can provide more specific details about the status of your application or service. It can be designed to test database connectivity, verify that external services are reachable, or check other crucial parts of your application. The root website might just display static content, which doesn’t necessarily indicate the health of your backend systems.

Reduced Resource Load: An API endpoint can be designed to be lightweight and consume fewer server resources than loading the entire website, making it more efficient to monitor.

Better Control: An API endpoint for status allows developers to control what exactly constitutes a “healthy” service. If the API is responding as expected, the service is healthy. If not, it’s not healthy.

Easier Troubleshooting: If a problem occurs, monitoring a specific API endpoint can make it easier to diagnose and troubleshoot because you can focus on a specific part of your application or service.

Faster Response Times: API endpoints typically have faster response times than fully loaded webpages. This makes the health check more efficient and potentially allows for quicker detection of problems.

Flexibility: An API endpoint for status can be designed to return various types of responses (e.g., JSON, XML) which can include detailed health data if necessary. This is more flexible than relying on an HTTP status code from a website.

Remember, for effective monitoring, it is essential that the API endpoint you’re monitoring provides a good indication of the overall system health.

API or Keepalive Page

It is considered a good practice to have a specific API endpoint or a keepalive page that accurately reflects the health of your application.  For instance:


Whether you should use an API or a keepalive page largely depends on your specific needs:

API Endpoint for Health Status
• This is usually a RESTful endpoint returning JSON or XML data.
• It is beneficial when you need to monitor various aspects of your system, such as database connectivity, cache server status, third-party service availability, etc.
• It allows more granular control over what is being monitored and can provide detailed data on different components of the system.

Keepalive Page
• This is typically a simple webpage that returns a 200 OK HTTP status code when the site is up.
• It can be a good fit if you simply want to monitor if your website is accessible or not.
• However, it may not provide as much detailed information about the health of your overall application or system as an API endpoint would.

In both cases, remember to design these endpoints/pages to be lightweight and consume minimal resources. You don’t want your monitoring system to place an undue load on the services it’s monitoring.