deploy_gce.sh

#!/usr/bin/env bash
# Deploy the LangCache demo to the GCE VM behind langcache.platformengineer.io.
# Run from the repo root on your laptop. Requires gcloud auth.
#
# Topology (since 2026-07): the demo runs ON the gabs-demos VM (the wildcard
# Caddy host, static IP gabs-demos-ip) as a plain docker container named
# langcache-demo, env in /root/langcache.env, Caddy proxying 127.0.0.1:7860.
#
# Usage: ./deploy_gce.sh [image-tag]   (default: v4.0.0-en)

set -euo pipefail

TAG="${1:-v4.0.0-en}"
IMAGE="langcache-demo:${TAG}"
VM="gabs-demos"
ZONE="us-central1-a"
PROJECT="central-beach-194106"
TARBALL="$(mktemp -d)/langcache-src.tgz"

echo ">> Packing source (no .env, no venv, no heavy artifacts)"
tar czf "$TARBALL" \
  --exclude='.git' --exclude='.venv' --exclude='.env' --exclude='.idea' \
  --exclude='__pycache__' --exclude='harness*' --exclude='*.pdf' --exclude='*.tar.gz' .

echo ">> Copying to VM"
gcloud compute scp --zone "$ZONE" --project "$PROJECT" "$TARBALL" "$VM:/tmp/langcache-src.tgz"

echo ">> Building ${IMAGE} and recreating the container (env stays in /root/langcache.env)"
gcloud compute ssh --zone "$ZONE" "$VM" --project "$PROJECT" --command "sudo sh -c '
  set -e
  test -s /root/langcache.env || { echo \"ERROR: /root/langcache.env missing on the VM\"; exit 1; }
  rm -rf /root/langcache-src && mkdir -p /root/langcache-src
  tar xzf /tmp/langcache-src.tgz -C /root/langcache-src
  cd /root/langcache-src
  docker build -t ${IMAGE} -t langcache-demo:latest .
  docker rm -f langcache-demo >/dev/null 2>&1 || true
  docker run -d --name langcache-demo --restart unless-stopped \
    -p 127.0.0.1:7860:7860 --env-file /root/langcache.env ${IMAGE}
'"

echo ">> Validating"
sleep 8
curl -fsS https://langcache.platformengineer.io/healthz && echo && echo "Deploy OK: https://langcache.platformengineer.io"