Docs The addons agent httpcheck

httpcheck

Fetch a URL and time every stage of it separately, because a slow resolver and a slow server wake up different people.

Parameters

Parameter	Default	Meaning
`url`REQUIRED		http or https.
`method`	`GET`
`headers`		Map of request headers.
`body`		Request body, sent as-is.
`expect_status`	`200`	Any other status is down.
`body_matches`		RE2 pattern the body must match, else down.
`max_ttfb`		Time to first byte above this is degraded.
`follow_redirects`	`true`

Key	Unit
`dns_ms`, `connect_ms`, `tls_ms`, `ttfb_ms`, `total_ms`	milliseconds, each stage on its own
`body_bytes`	bytes

{"name":"slow-ttfb","match":{"tags":["addon:httpcheck"]},
 "conditions":[{"key":"ttfb_ms","op":"gte","value":500}]}

{"name":"probe-down","match":{"tags":["addon:httpcheck"],"min_level":400},
 "fire_after":{"count":2,"window_minutes":5,"distinct_sources":true}}