Linux Monitoring Tools: The Four Tiers, and What Each Sees
Linux monitoring tools split into four tiers: terminal, agent, aggregator and external probe. Here is what each one can see, and where the blind spot is.
Knowledge hub
Cross-region confirmation, timing waterfalls, and the craft of quiet monitoring.
Kubernetes Monitoring Tools: Four Questions, Three Sources
Kubernetes monitoring tools split by which question they answer, not by rank. Here is what metrics-server, cAdvisor and kube-state-metrics each see.
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.
Incident Management Tools: Buy by the Minute, Not the List
Incident management tools compared by the minute of the outage they serve: detection, paging, coordination, customer comms, and the review the week after.
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.
Hosted Status Page: The Shared-Fate Test That Decides It
A hosted status page is worth it for one reason: it does not share your network, certificate, DNS zone or login. Here is how to check that it really doesn't.