e3ee020d53
postfix-queue-check.sh:
- Reads mailq queue depth, writes postfix_queue_size{host=X} textfile metric
- Deployed on compute3 (systemd node_exporter) and compute5 (Docker)
- Cron: */5 * * * * as root on each host
- Prometheus alert: postfix_queue_size > 10 (uid: efl8kjns461a8f)
node-exporter-compute5-compose.yml:
- Added textfile volume mount /var/lib/node_exporter/textfile:/textfile:ro
- Added --collector.textfile.directory=/textfile flag
cert-expiry-check.sh:
- Also stored here for monitoring/ grouping
Phase 4D Grafana alert rules (all in Infrastructure Alerts folder):
cfl8jqdlhu680d TLS Cert Expiry Warning (30d) — break-tested ✓
afl8jqdoepwqod TLS Cert ACME Renewal Failure (14d) — no real certs in window
ffl8k2ry0nu2od Alertmanager Down — break-tested, fired ✓
efl8kjns461a8f Postfix Queue Backing Up — metric confirmed, 5m window
dfl8k2s0xjklcf Authelia Restart Loop — cadvisor-based proxy metric
Rules stored in grafana.db only — not yaml-provisioned (Phase 5 candidate)
22 lines
656 B
YAML
22 lines
656 B
YAML
# node-exporter - Host metrics exporter for Prometheus
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# Host: compute5 (192.168.99.196), Port: 9100
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services:
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node-exporter:
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image: prom/node-exporter:latest
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container_name: node-exporter
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restart: unless-stopped
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pid: host
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network_mode: host
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volumes:
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- /proc:/host/proc:ro
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- /sys:/host/sys:ro
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- /:/rootfs:ro
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- /var/lib/node_exporter/textfile:/textfile:ro
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command:
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- '--path.procfs=/host/proc'
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- '--path.sysfs=/host/sys'
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- '--path.rootfs=/rootfs'
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- '--collector.textfile.directory=/textfile'
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- '--collector.filesystem.mount-points-exclude=^/(sys|proc|dev|host|etc)($$|/)'
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