Erich Blume
b667f21e10
The health check returned 200 immediately on nginx start, before Tailscale connected. Fly.io routed traffic to the new machine with a cold proxy cache and no MagicDNS, causing upstream DNS timeouts. Defer the health check by returning 503 until a sentinel file (/tmp/tailscale-ready) is created after Tailscale connects. This keeps the old machine serving traffic during the startup window. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
31 lines
1.1 KiB
Bash
31 lines
1.1 KiB
Bash
#!/bin/sh
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set -e
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# Start nginx immediately so port 8080 is bound (avoids connection refused).
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# Health check returns 503 until /tmp/tailscale-ready exists, so Fly.io
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# keeps the old machine serving traffic until Tailscale connects.
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nginx -g "daemon off;" &
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NGINX_PID=$!
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echo "Nginx started (waiting for Tailscale before proxying)"
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# Start tailscale daemon. Fly.io runs Firecracker microVMs which support
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# TUN devices natively — no need for --tun=userspace-networking.
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tailscaled --statedir=/var/lib/tailscale &
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sleep 2
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# Authenticate and join tailnet
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tailscale up --authkey="${TS_AUTHKEY}" --hostname=flyio-proxy
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# Wait for tailscale to be ready, then signal nginx health check
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until tailscale status > /dev/null 2>&1; do sleep 1; done
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touch /tmp/tailscale-ready
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echo "Tailscale connected"
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# Start Alloy for observability (logs → Loki, metrics → Prometheus)
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alloy run /etc/alloy/config.alloy \
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--server.http.listen-addr=127.0.0.1:12345 \
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--storage.path=/tmp/alloy-data &
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echo "Alloy started"
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# Block on nginx — container exits if nginx stops
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wait $NGINX_PID
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