Alert thresholds depend on the nature of your applications. Some queries may have arbitrary tolerance thresholds. Building an efficient monitoring platform takes time. 😉
3 Prometheus alerting rules for Juniper. Exported via czerwonk/junos_exporter. These rules cover critical and warning conditions — copy and paste the YAML into your Prometheus configuration.
groups:
- name: CzerwonkJunosExporter
rules:
- alert: JuniperSwitchDown
expr: junos_up == 0
for: 0m
labels:
severity: critical
annotations:
summary: Juniper switch down (instance {{ $labels.instance }})
description: "The switch appears to be down\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: JuniperCriticalBandwidthUsage1GiB
expr: rate(junos_interface_transmit_bytes[1m]) * 8 > 1e+9 * 0.90
for: 1m
labels:
severity: critical
annotations:
summary: Juniper critical Bandwidth Usage 1GiB (instance {{ $labels.instance }})
description: "Interface is highly saturated. (> 0.90GiB/s)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: JuniperWarningBandwidthUsage1GiB
expr: rate(junos_interface_transmit_bytes[1m]) * 8 > 1e+9 * 0.80
for: 1m
labels:
severity: warning
annotations:
summary: Juniper warning Bandwidth Usage 1GiB (instance {{ $labels.instance }})
description: "Interface is getting saturated. (> 0.80GiB/s)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" wget https://raw.githubusercontent.com/samber/awesome-prometheus-alerts/refs/heads/master/dist/rules/juniper/czerwonk-junos-exporter.yml
The switch appears to be down
- alert: JuniperSwitchDown
expr: junos_up == 0
for: 0m
labels:
severity: critical
annotations:
summary: Juniper switch down (instance {{ $labels.instance }})
description: "The switch appears to be down\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" Interface is highly saturated. (> 0.90GiB/s)
- alert: JuniperCriticalBandwidthUsage1GiB
expr: rate(junos_interface_transmit_bytes[1m]) * 8 > 1e+9 * 0.90
for: 1m
labels:
severity: critical
annotations:
summary: Juniper critical Bandwidth Usage 1GiB (instance {{ $labels.instance }})
description: "Interface is highly saturated. (> 0.90GiB/s)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" Interface is getting saturated. (> 0.80GiB/s)
- alert: JuniperWarningBandwidthUsage1GiB
expr: rate(junos_interface_transmit_bytes[1m]) * 8 > 1e+9 * 0.80
for: 1m
labels:
severity: warning
annotations:
summary: Juniper warning Bandwidth Usage 1GiB (instance {{ $labels.instance }})
description: "Interface is getting saturated. (> 0.80GiB/s)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"