Case Study
Self-Healing Homelab: 47-Second Recovery, Zero Human Intervention
The Problem
A growing fleet of self-hosted services — Gitea, Wiki.js, Paperless-ngx, Prometheus, Grafana, Loki — spread across 13 hosts with no automated response to failures. Every container crash, disk pressure event, or expired certificate required manual SSH and diagnosis. At 2am, that means downtime until morning.
The Solution
OpsKern deployed its full operations stack on its own infrastructure: Prometheus for metrics, Alertmanager for routing, Loki for logs, and the OpsKern operations agent as the central coordinator. 94 alert rules watch for the failure modes that actually happen — host unreachable, disk pressure, systemd failures, TLS expiry, container health, backup staleness.
41 automated remediation mappings backed by 26 playbooks handle the most common failure types. When a known issue fires, the agent classifies it by risk tier, dispatches the right Ansible playbook, verifies the fix, and logs the outcome. Unknown issues get escalated with full context.
Backups run nightly via Restic across 3 repositories with 7-day, 4-week, 6-month, and 1-year retention. The NAS replicates 916 GB to Backblaze B2 daily. The agent verifies backup freshness at 07:00 UTC — if any host’s snapshot is stale, it alerts immediately.
The Results
A Docker container crashed at 2am on a Tuesday. The operations agent caught the alert, classified the failure, dispatched the correct Ansible playbook, and had the service back online in 47 seconds. No ticket. No escalation. No human involved.
| Metric | Before | After |
|---|---|---|
| Mean recovery time | 2-8 hours (next morning) | 47 seconds |
| Overnight incidents requiring human | All of them | Zero |
| Backup verification | Manual spot checks | Daily automated, every host |
| Configuration drift detection | None | Continuous, git-diffed |
| Prometheus targets scraped | 0 | 32 (every 15s) |
| Log retention | Ad-hoc | 90 days, centralized |
Why It Matters
Your infrastructure runs the same stack — same Ansible roles, same alert rules, same remediation playbooks. When something breaks in our environment, we find and fix it before it reaches yours.