Configure an HTTP/HTTPS monitor

Configure the request

• Enter an HTTP or HTTPS URL. The target can be up to 2048 characters.
• Choose a method: GET, POST, PUT, DELETE, HEAD, PATCH, or OPTIONS. GET is the default.
• Add custom header names up to 100 characters and values up to 2048 characters. Header values cannot contain line breaks.
• Add a request body for POST, PUT, or PATCH requests. The body limit is 10 KB.
• Set the request timeout from 1 to 60 seconds. The default is 10 seconds. Retries accept 1 to 10 attempts, with 3 as the default.
• Custom headers, request body, method, timeout, and retries are saved with the monitor but are not applied by the probe fleet yet: every check is a plain GET with a fleet-wide timeout and retry policy.

Validate the response

• Set expectedStatusCodes. The default is 2xx; you can use an individual code such as 200, a comma-separated list such as 200,201, or a range such as 200-299.
• Add responseContentMatch to require a text substring in the response body.
• Set the response-time threshold from 100 to 60000 ms. The default is 5000 ms.
• Set the uptime threshold from 1% to 100%. The default is 99%.

Check the certificate

Probes always verify the certificate while connecting to an HTTPS target; an invalid certificate fails the check. The sslValidation option is saved with the HTTP monitor configuration but does not change that behaviour yet.

Related

• Monitor types overview
• Creating a monitor
• SSL certificate checks