blumeops/fly/start.sh
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

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#!/bin/sh
set -e
# Start nginx immediately so port 8080 is bound before Fly's deploy checks.
# Upstream DNS resolution is deferred via resolver + variable in nginx.conf,
# so nginx starts cleanly even before Tailscale connects.
nginx -g "daemon off;" &
NGINX_PID=$!
echo "Nginx started (waiting for Tailscale before proxying)"
# Start tailscale daemon. Fly.io runs Firecracker microVMs which support
# TUN devices natively — no need for --tun=userspace-networking.
tailscaled --statedir=/var/lib/tailscale &
sleep 2
# Authenticate and join tailnet
tailscale up --authkey="${TS_AUTHKEY}" --hostname=flyio-proxy
# Wait for tailscale to be ready
until tailscale status > /dev/null 2>&1; do sleep 1; done
echo "Tailscale connected"
# Start Alloy for observability (logs → Loki, metrics → Prometheus)
alloy run /etc/alloy/config.alloy \
--server.http.listen-addr=127.0.0.1:12345 \
--storage.path=/tmp/alloy-data &
echo "Alloy started"
# Block on nginx — container exits if nginx stops
wait $NGINX_PID