Thomas SharedInboxandClaude Sonnet 4.6
4a99d47aa5
Connection drops consistently at ~50s suggest NAT/firewall idle timeout. Keepalive probes every 10s on the remote side prevent the RST. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
74 lines
2.1 KiB
Bash
Executable File
74 lines
2.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Establishes a secure tunnel to a remote Dagger Engine via stunnel.
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set -euo pipefail
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if [ -z "${DAGGER_STUNNEL_URL:-}" ]; then
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echo "Error: DAGGER_STUNNEL_URL must be set."
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exit 1
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fi
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# Parse host and port (e.g., example.com:8774 or just example.com)
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host=$(echo "$DAGGER_STUNNEL_URL" | cut -d: -f1)
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port=$(echo "$DAGGER_STUNNEL_URL" | cut -d: -f2)
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if [ "$host" == "$port" ]; then
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port="8774"
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fi
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echo "Probing $host:$port..."
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if ! nc -zw 3 "$host" "$port" 2>/dev/null; then
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echo "Error: No Dagger server responded on $host:$port"
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exit 1
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fi
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echo "Found active Dagger server on $host:$port"
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# 2. Setup TLS credentials (passed as env vars from secrets)
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mkdir -p /tmp/dagger-tls
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echo "$DAGGER_CA_CERT" > /tmp/dagger-tls/ca.crt
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echo "$DAGGER_CLIENT_CERT" > /tmp/dagger-tls/client.crt
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echo "$DAGGER_CLIENT_KEY" > /tmp/dagger-tls/client.key
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chmod 600 /tmp/dagger-tls/client.key
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# 3. Configure and start stunnel
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STUNNEL_CONF="/tmp/stunnel-dagger.conf"
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cat << EOF > "$STUNNEL_CONF"
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client = yes
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foreground = yes
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pid = /tmp/stunnel.pid
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; TCP keepalive on the remote side to prevent NAT/firewall from resetting the connection
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socket = r:SO_KEEPALIVE=1
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socket = r:TCP_KEEPIDLE=10
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socket = r:TCP_KEEPINTVL=5
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socket = r:TCP_KEEPCNT=3
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[dagger]
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accept = 127.0.0.1:1774
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connect = $host:$port
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CAfile = /tmp/dagger-tls/ca.crt
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cert = /tmp/dagger-tls/client.crt
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key = /tmp/dagger-tls/client.key
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verifyChain = yes
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EOF
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# Start stunnel in the background
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stunnel "$STUNNEL_CONF" &
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TUNNEL_PID=$!
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# Give it a moment to establish
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sleep 2
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if ! kill -0 "$TUNNEL_PID" 2>/dev/null; then
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echo "Error: stunnel failed to start"
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exit 1
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fi
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# 4. Export environment for subsequent CI steps
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if [ -n "${GITHUB_ENV:-}" ]; then
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echo "_EXPERIMENTAL_DAGGER_RUNNER_HOST=tcp://127.0.0.1:1774" >> "$GITHUB_ENV"
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echo "_DAGGER_RUNNER_HOST=tcp://127.0.0.1:1774" >> "$GITHUB_ENV"
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echo "Tunnel established. Dagger is configured to use the remote engine."
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else
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export _EXPERIMENTAL_DAGGER_RUNNER_HOST=tcp://127.0.0.1:1774
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export _DAGGER_RUNNER_HOST=tcp://127.0.0.1:1774
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echo "Tunnel established. Run: export _DAGGER_RUNNER_HOST=tcp://127.0.0.1:1774"
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fi
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