Prometheus
Metrics
Human-readable text-based
Metrics entries: TYPE and HELP attributes
HELP -> description of what metric is
TYPE
COUNTER: how many times X happened
GAUGE: what is a current value of x now
HISTOGRAM: how long or how big
Some apps/components have /metrics
endpoint (e.g. Spring actuator), but some not. E.g. MySQL, Linux. This is how it is working (Exporters list 🔗HERE):
Alert Manager
Limits
single node, self containing -> hard to scale
Last updated