groups:
name: custom_rules
rules:
record: node_memory_MemFree_percent
expr: 100 – (100 * node_memory_MemFree_bytes / node_memory_MemTotal_bytes)
name: alert_rules
rules:
alert: InstanceDown_MEMCACHED_EXPORTER-10.25.52.163
labels:
severity: critical
expr: up{job= “MEMCACHED_EXPORTER-10.25.52.163”} == 0
for: 30s
annotations:
summary: “Instance [{{ $labels.instance }}] down”
description: “[{{ $labels.instance }}] of job [{{ $labels.job }}] has been down for more than 1 minute.”