Erich Blume
a0dc7ec511
Instrument the flyio-proxy container with Grafana Alloy to collect nginx JSON access logs (→ Loki) and derive request/latency/cache metrics (→ Prometheus). Adds stub_status for connection-level metrics. Includes two Grafana dashboards: Docs APM (per-service) and Fly.io Proxy Health (aggregate). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
84 lines
2.4 KiB
Nginx Configuration File
84 lines
2.4 KiB
Nginx Configuration File
worker_processes auto;
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events {
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worker_connections 1024;
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}
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http {
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include /etc/nginx/mime.types;
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default_type application/octet-stream;
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# JSON access log for Alloy to tail → Loki + metric extraction
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log_format json_log escape=json
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'{'
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'"time":"$time_iso8601",'
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'"remote_addr":"$remote_addr",'
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'"request_method":"$request_method",'
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'"request_uri":"$request_uri",'
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'"status":$status,'
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'"body_bytes_sent":$body_bytes_sent,'
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'"request_time":$request_time,'
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'"upstream_response_time":"$upstream_response_time",'
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'"upstream_cache_status":"$upstream_cache_status",'
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'"http_host":"$http_host",'
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'"http_user_agent":"$http_user_agent"'
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'}';
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access_log /var/log/nginx/access.json.log json_log;
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# Rate limiting zones — define per-service zones as needed
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limit_req_zone $binary_remote_addr zone=general:10m rate=10r/s;
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# Proxy cache: 200MB, evict after 24h of no access
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proxy_cache_path /tmp/cache levels=1:2 keys_zone=services:10m
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max_size=200m inactive=24h;
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# --- docs.eblu.me (static site) ---
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server {
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listen 8080;
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server_name docs.eblu.me;
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limit_req zone=general burst=20 nodelay;
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location / {
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proxy_pass https://docs.tail8d86e.ts.net;
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proxy_ssl_verify off;
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proxy_ssl_server_name on;
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# Cache aggressively — static site only.
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# Do NOT use these settings for dynamic services.
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proxy_cache services;
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proxy_cache_valid 200 1d;
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proxy_cache_valid 404 1m;
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proxy_cache_use_stale error timeout updating;
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proxy_cache_lock on;
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# Prevent cache-busting: ignore query strings and
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# client cache-control headers.
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# Safe for static sites; breaks dynamic services.
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proxy_cache_key $host$uri;
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proxy_ignore_headers Cache-Control Set-Cookie;
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add_header X-Cache-Status $upstream_cache_status;
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}
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}
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# Catch-all: reject unknown hosts, but serve health check
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server {
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listen 8080 default_server;
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location /healthz {
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return 200 "ok\n";
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}
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location /stub_status {
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stub_status;
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allow 127.0.0.1;
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deny all;
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}
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location / {
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return 444;
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}
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}
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}
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