3 Prometheus alerting rules for Apache. Exported via Lusitaniae/apache_exporter. These rules cover critical and warning conditions — copy and paste the YAML into your Prometheus configuration.
Alert thresholds depend on the nature of your applications. Some queries may have arbitrary tolerance thresholds. Building an efficient monitoring platform takes time. 😉
groups:
- name: LusitaniaeApacheExporter
rules:
- alert: ApacheDown
expr: apache_up == 0
for: 0m
labels:
severity: critical
annotations:
summary: Apache down (instance {{ $labels.instance }})
description: "Apache down\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: ApacheWorkersLoad
expr: (sum by (instance) (apache_workers{state="busy"}) / sum by (instance) (apache_scoreboard) ) * 100 > 80 and sum by (instance) (apache_scoreboard) > 0
for: 2m
labels:
severity: warning
annotations:
summary: Apache workers load (instance {{ $labels.instance }})
description: "Apache workers in busy state approach the max workers count 80% workers busy on {{ $labels.instance }}\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: ApacheRestart
expr: apache_uptime_seconds_total / 60 < 1
for: 0m
labels:
severity: info
annotations:
summary: Apache restart (instance {{ $labels.instance }})
description: "Apache has just been restarted.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" wget https://raw.githubusercontent.com/samber/awesome-prometheus-alerts/refs/heads/master/dist/rules/apache/lusitaniae-apache-exporter.yml
Apache down
- alert: ApacheDown
expr: apache_up == 0
for: 0m
labels:
severity: critical
annotations:
summary: Apache down (instance {{ $labels.instance }})
description: "Apache down\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" Apache workers in busy state approach the max workers count 80% workers busy on {{ $labels.instance }}
- alert: ApacheWorkersLoad
expr: (sum by (instance) (apache_workers{state="busy"}) / sum by (instance) (apache_scoreboard) ) * 100 > 80 and sum by (instance) (apache_scoreboard) > 0
for: 2m
labels:
severity: warning
annotations:
summary: Apache workers load (instance {{ $labels.instance }})
description: "Apache workers in busy state approach the max workers count 80% workers busy on {{ $labels.instance }}\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" Apache has just been restarted.
- alert: ApacheRestart
expr: apache_uptime_seconds_total / 60 < 1
for: 0m
labels:
severity: info
annotations:
summary: Apache restart (instance {{ $labels.instance }})
description: "Apache has just been restarted.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"