blumeops/docs/reference/services/loki.md

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---
title: Loki
modified: 2026-02-08
tags:
- service
- observability
---
# Loki
Log aggregation system for BlumeOps infrastructure.
## Quick Reference
| Property | Value |
|----------|-------|
| **URL** | https://loki.ops.eblu.me |
| **Tailscale URL** | https://loki.tail8d86e.ts.net |
| **Namespace** | `monitoring` |
| **Image** | `grafana/loki:3.4.2` |
| **Storage** | 50Gi PVC |
| **Retention** | 31 days |
## Architecture
- Single-node deployment with filesystem storage
- TSDB index with 24h period
- Logs collected by [[alloy|Alloy]] and pushed via Loki API
- Queried via [[grafana]]
## Log Sources
**From Indri (via Alloy):**
- forgejo, tailscale (brew services)
- alloy, borgmatic, zot, jellyfin (LaunchAgents)
**From Kubernetes (via Alloy DaemonSet):**
- All pods in all namespaces
Add Fly.io proxy observability via embedded Alloy (#123) ## Summary - Embed Grafana Alloy in the Fly.io proxy container to collect nginx JSON access logs (→ Loki) and derive request rate, latency histogram, cache status, and bandwidth metrics (→ Prometheus) - Add nginx `stub_status` endpoint for connection-level metrics (active/reading/writing/waiting) - Create two Grafana dashboards: **Docs APM** (per-service view filtered by `host="docs.eblu.me"`) and **Fly.io Proxy Health** (aggregate proxy health across all upstream services) ## Changed Files | File | Change | |------|--------| | `fly/nginx.conf` | Add JSON `log_format` + `access_log`, add `stub_status` endpoint | | `fly/Dockerfile` | COPY Alloy binary from `grafana/alloy:v1.5.1`, COPY `alloy.river` config | | `fly/alloy.river` | **New** — Alloy config: log tailing, metric extraction, remote_write | | `fly/start.sh` | Start Alloy after Tailscale, before nginx | | `argocd/manifests/grafana-config/dashboards/configmap-docs-apm.yaml` | **New** — Docs APM dashboard | | `argocd/manifests/grafana-config/dashboards/configmap-flyio.yaml` | **New** — Fly.io Proxy Health dashboard | | `argocd/manifests/grafana-config/kustomization.yaml` | Register new dashboard configmaps | | `docs/reference/services/flyio-proxy.md` | Document observability setup | ## Deployment and Testing - [ ] `mise run fly-deploy` — rebuild container with Alloy - [ ] `curl https://docs.eblu.me/` — generate traffic - [ ] `fly logs -a blumeops-proxy` — verify Alloy startup - [ ] Query Prometheus: `flyio_nginx_http_requests_total{instance="flyio-proxy"}` - [ ] Query Loki: `{instance="flyio-proxy", job="flyio-nginx"}` - [ ] `argocd app sync grafana-config` — deploy dashboards - [ ] Verify dashboards show data in Grafana - [ ] `mise run services-check` — no regressions Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/123
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**From Fly.io proxy (via embedded Alloy):**
- nginx JSON access logs (`{instance="flyio-proxy", job="flyio-nginx"}`)
## Query Examples (LogQL)
```logql
{service="forgejo"} # All forgejo logs
{service="borgmatic", stream="stderr"} # Borgmatic errors
{host="indri"} |= "error" # All logs containing "error"
Add Fly.io proxy observability via embedded Alloy (#123) ## Summary - Embed Grafana Alloy in the Fly.io proxy container to collect nginx JSON access logs (→ Loki) and derive request rate, latency histogram, cache status, and bandwidth metrics (→ Prometheus) - Add nginx `stub_status` endpoint for connection-level metrics (active/reading/writing/waiting) - Create two Grafana dashboards: **Docs APM** (per-service view filtered by `host="docs.eblu.me"`) and **Fly.io Proxy Health** (aggregate proxy health across all upstream services) ## Changed Files | File | Change | |------|--------| | `fly/nginx.conf` | Add JSON `log_format` + `access_log`, add `stub_status` endpoint | | `fly/Dockerfile` | COPY Alloy binary from `grafana/alloy:v1.5.1`, COPY `alloy.river` config | | `fly/alloy.river` | **New** — Alloy config: log tailing, metric extraction, remote_write | | `fly/start.sh` | Start Alloy after Tailscale, before nginx | | `argocd/manifests/grafana-config/dashboards/configmap-docs-apm.yaml` | **New** — Docs APM dashboard | | `argocd/manifests/grafana-config/dashboards/configmap-flyio.yaml` | **New** — Fly.io Proxy Health dashboard | | `argocd/manifests/grafana-config/kustomization.yaml` | Register new dashboard configmaps | | `docs/reference/services/flyio-proxy.md` | Document observability setup | ## Deployment and Testing - [ ] `mise run fly-deploy` — rebuild container with Alloy - [ ] `curl https://docs.eblu.me/` — generate traffic - [ ] `fly logs -a blumeops-proxy` — verify Alloy startup - [ ] Query Prometheus: `flyio_nginx_http_requests_total{instance="flyio-proxy"}` - [ ] Query Loki: `{instance="flyio-proxy", job="flyio-nginx"}` - [ ] `argocd app sync grafana-config` — deploy dashboards - [ ] Verify dashboards show data in Grafana - [ ] `mise run services-check` — no regressions Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/123
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{instance="flyio-proxy"} |= "docs.eblu.me" # Fly.io proxy access logs for docs
```
## Related
- [[alloy|Alloy]] - Log collector
- [[grafana]] - Log visualization
- [[prometheus]] - Metrics counterpart