blumeops/fly/nginx.conf
Erich Blume c6f8fcd346
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Fix fly-deploy WARNING by starting nginx before Tailscale (#128)
## Summary
- Start nginx before Tailscale in `start.sh` so port 8080 is bound immediately, eliminating the "app is not listening on the expected address" WARNING during `fly deploy`
- Switch `proxy_pass` to use a variable with `resolver 100.100.100.100 valid=30s` so nginx can start without resolving MagicDNS names at config load time
- DNS results cached 30s per worker — no per-request lookup overhead

## Context
The WARNING was a race condition: Fly checks for listeners right after the machine starts, but `start.sh` ran ~5-10s of Tailscale setup before starting nginx. The health check always passed later, but the warning was noisy.

## Test plan
- [ ] Merge and let the deploy-fly workflow trigger
- [ ] Check runner logs for absence of the WARNING
- [ ] Verify `docs.eblu.me` still serves correctly
- [ ] Verify `/healthz` still passes

Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/128
2026-02-09 07:01:58 -08:00

91 lines
2.8 KiB
Nginx Configuration File

worker_processes auto;
events {
worker_connections 1024;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
# JSON access log for Alloy to tail → Loki + metric extraction
log_format json_log escape=json
'{'
'"time":"$time_iso8601",'
'"remote_addr":"$remote_addr",'
'"request_method":"$request_method",'
'"request_uri":"$request_uri",'
'"status":$status,'
'"body_bytes_sent":$body_bytes_sent,'
'"request_time":$request_time,'
'"upstream_response_time":"$upstream_response_time",'
'"upstream_cache_status":"$upstream_cache_status",'
'"http_host":"$http_host",'
'"http_user_agent":"$http_user_agent"'
'}';
access_log /var/log/nginx/access.json.log json_log;
# Rate limiting zones — define per-service zones as needed
limit_req_zone $binary_remote_addr zone=general:10m rate=10r/s;
# Proxy cache: 200MB, evict after 24h of no access
proxy_cache_path /tmp/cache levels=1:2 keys_zone=services:10m
max_size=200m inactive=24h;
# MagicDNS resolver — using a variable in proxy_pass defers upstream DNS
# resolution to request time, letting nginx start before Tailscale connects.
# Results are cached for 30s per worker to avoid per-request DNS lookups.
resolver 100.100.100.100 valid=30s;
resolver_timeout 5s;
# --- docs.eblu.me (static site) ---
server {
listen 8080;
server_name docs.eblu.me;
limit_req zone=general burst=20 nodelay;
location / {
set $upstream_docs https://docs.tail8d86e.ts.net;
proxy_pass $upstream_docs$request_uri;
proxy_ssl_verify off;
proxy_ssl_server_name on;
# Cache aggressively — static site only.
# Do NOT use these settings for dynamic services.
proxy_cache services;
proxy_cache_valid 200 1d;
proxy_cache_valid 404 1m;
proxy_cache_use_stale error timeout updating;
proxy_cache_lock on;
# Prevent cache-busting: ignore query strings and
# client cache-control headers.
# Safe for static sites; breaks dynamic services.
proxy_cache_key $host$uri;
proxy_ignore_headers Cache-Control Set-Cookie;
add_header X-Cache-Status $upstream_cache_status;
}
}
# Catch-all: reject unknown hosts, but serve health check
server {
listen 8080 default_server;
location /healthz {
return 200 "ok\n";
}
location /stub_status {
stub_status;
allow 127.0.0.1;
deny all;
}
location / {
return 444;
}
}
}