MySQL Health Check: The Two Probes That Lie
A mysql health check built on mysqladmin ping reports success with the wrong password, and a socket probe matches the temporary server on first boot.
#health-checks
35 posts tagged "Health Checks".
Kafka Health Check: Brokers, Clients and Canaries
A kafka health check answers one of two questions: can the cluster serve traffic, or is this client still working. Here is the right probe for each.
HTTP Status Codes: Which Ones Should Page You
Most HTTP status codes are noise on a pager. Here is which ones should wake you, which belong in a ticket, and how to assert on them.
Go Health Check: Handler, Context and Drain Window
A go health check is code you write yourself, so the deadline, the dependency list and the drain window are yours to get right. Here is the working shape.
FastAPI Health Check: Async Routes That Tell the Truth
A FastAPI health check that blocks the event loop hurts more than it helps. Here are two async routes, concurrent dependency probes and a quiet access log.
Elasticsearch Health Check: Green, Yellow, Red
An elasticsearch health check returns green, yellow or red, and yellow is where the false alarms live. Here is what to check and what to assert.