Health

Defines a recurring health check request for its backend. Results can be obtained via the backends.<label>.health variables. Changes in health states and related requests will be logged. Default User-Agent will be Couper / <version> health-check if not provided via headers attribute. An unhealthy backend will return with a backend_unhealthy error.

Block name	Context	Label
`beta_health`	`backend` block	no label

Attributes

Name	Type	Default	Description
`expected_status`	tuple (int)	`[200, 204, 301]`	One of wanted response status codes.
`expected_text`	string	-	Text which the response body must contain.
`failure_threshold`	number	`2`	Failed checks needed to consider backend unhealthy.
`headers`	object	-	Request HTTP header fields.
`interval`	string	`"1s"`	Time interval for recheck.
`path`	string	-	URL path with query on backend host.
`timeout`	string	`"1s"`	Maximum allowed time limit which is bounded by `interval`.