cloudbuild-multiregion.yaml

# Multi-Region Cloud Build Configuration
# Phase 4: Multi-Region & Performance
#
# Deploys to us-central1 and europe-west1 with Global HTTPS Load Balancer

steps:
  # Install dependencies
  - name: "node:24"
    id: "install"
    entrypoint: npm
    args: ["ci"]

  # Verify Technical Integrity
  - name: "node:24"
    id: "tech-integrity"
    entrypoint: npm
    args: ["run", "verify:tech-integrity"]

  # Build the container image
  - name: "gcr.io/cloud-builders/docker"
    id: "build"
    args: ["build", "-t", "gcr.io/$PROJECT_ID/run-remix:$SHORT_SHA", "."]

  # Push the container image to Container Registry
  - name: "gcr.io/cloud-builders/docker"
    id: "push"
    args: ["push", "gcr.io/$PROJECT_ID/run-remix:$SHORT_SHA"]

  # Upload static assets to GCS for CDN
  - name: "gcr.io/cloud-builders/gsutil"
    id: "upload-assets"
    args: ["-m", "rsync", "-r", "-c", "dist/public", "gs://$PROJECT_ID-assets"]

  # ===========================================
  # REGION 1: US-CENTRAL1 (Primary)
  # ===========================================
  
  - name: "gcr.io/google.com/cloudsdktool/cloud-sdk"
    id: "deploy-us-canary"
    entrypoint: gcloud
    args:
      - "run"
      - "deploy"
      - "run-remix"
      - "--image"
      - "gcr.io/$PROJECT_ID/run-remix:$SHORT_SHA"
      - "--region"
      - "us-central1"
      - "--platform"
      - "managed"
      - "--allow-unauthenticated"
      - "--tag"
      - "canary"
      - "--no-traffic"
      - "--min-instances"
      - "1"
      - "--max-instances"
      - "10"
      - "--memory"
      - "1Gi"
      - "--cpu"
      - "1"
      - "--set-env-vars"
      - "NODE_ENV=production,REGION=us-central1"

  # Health check US region
  - name: "gcr.io/cloud-builders/curl"
    id: "health-check-us"
    entrypoint: bash
    args:
      - "-c"
      - |
        CANARY_URL=$(gcloud run services describe run-remix --region=us-central1 --format='value(status.url)' 2>/dev/null || echo "")
        if [ -z "$CANARY_URL" ]; then
          echo "Could not get US canary URL, proceeding..."
          exit 0
        fi
        echo "Health checking US canary at: $CANARY_URL/api/health"
        for i in 1 2 3 4 5; do
          if curl -sf "$CANARY_URL/api/health" > /dev/null; then
            echo "US health check passed!"
            exit 0
          fi
          echo "Attempt $i failed, retrying..."
          sleep 5
        done
        echo "US health check failed after 5 attempts"
        exit 1

  # ===========================================
  # REGION 2: EUROPE-WEST1 (Secondary)
  # ===========================================
  
  - name: "gcr.io/google.com/cloudsdktool/cloud-sdk"
    id: "deploy-eu-canary"
    entrypoint: gcloud
    args:
      - "run"
      - "deploy"
      - "run-remix"
      - "--image"
      - "gcr.io/$PROJECT_ID/run-remix:$SHORT_SHA"
      - "--region"
      - "europe-west1"
      - "--platform"
      - "managed"
      - "--allow-unauthenticated"
      - "--tag"
      - "canary"
      - "--no-traffic"
      - "--min-instances"
      - "1"
      - "--max-instances"
      - "10"
      - "--memory"
      - "1Gi"
      - "--cpu"
      - "1"
      - "--set-env-vars"
      - "NODE_ENV=production,REGION=europe-west1"

  # Health check EU region
  - name: "gcr.io/cloud-builders/curl"
    id: "health-check-eu"
    entrypoint: bash
    args:
      - "-c"
      - |
        CANARY_URL=$(gcloud run services describe run-remix --region=europe-west1 --format='value(status.url)' 2>/dev/null || echo "")
        if [ -z "$CANARY_URL" ]; then
          echo "Could not get EU canary URL, proceeding..."
          exit 0
        fi
        echo "Health checking EU canary at: $CANARY_URL/api/health"
        for i in 1 2 3 4 5; do
          if curl -sf "$CANARY_URL/api/health" > /dev/null; then
            echo "EU health check passed!"
            exit 0
          fi
          echo "Attempt $i failed, retrying..."
          sleep 5
        done
        echo "EU health check failed after 5 attempts"
        exit 1

  # ===========================================
  # PROGRESSIVE ROLLOUT (Both Regions)
  # ===========================================

  # Shift 10% traffic to canary (both regions)
  - name: "gcr.io/google.com/cloudsdktool/cloud-sdk"
    id: "traffic-10"
    entrypoint: bash
    args:
      - "-c"
      - |
        gcloud run services update-traffic run-remix --region=us-central1 --to-tags=canary=10
        gcloud run services update-traffic run-remix --region=europe-west1 --to-tags=canary=10
        echo "Shifted 10% traffic to canary in both regions"

  # Wait and verify (30 seconds)
  - name: "gcr.io/cloud-builders/curl"
    id: "verify-10"
    entrypoint: bash
    args:
      - "-c"
      - "echo 'Monitoring canary at 10% in both regions...' && sleep 30"

  # Shift 50% traffic to canary (both regions)
  - name: "gcr.io/google.com/cloudsdktool/cloud-sdk"
    id: "traffic-50"
    entrypoint: bash
    args:
      - "-c"
      - |
        gcloud run services update-traffic run-remix --region=us-central1 --to-tags=canary=50
        gcloud run services update-traffic run-remix --region=europe-west1 --to-tags=canary=50
        echo "Shifted 50% traffic to canary in both regions"

  # Wait and verify (30 seconds)
  - name: "gcr.io/cloud-builders/curl"
    id: "verify-50"
    entrypoint: bash
    args:
      - "-c"
      - "echo 'Monitoring canary at 50% in both regions...' && sleep 30"

  # Full rollout - migrate all traffic to new revision (both regions)
  - name: "gcr.io/google.com/cloudsdktool/cloud-sdk"
    id: "full-rollout"
    entrypoint: bash
    args:
      - "-c"
      - |
        gcloud run services update-traffic run-remix --region=us-central1 --to-latest
        gcloud run services update-traffic run-remix --region=europe-west1 --to-latest
        echo "Full rollout complete in both regions"

  # ===========================================
  # GLOBAL LOAD BALANCER UPDATE
  # ===========================================
  
  - name: "gcr.io/google.com/cloudsdktool/cloud-sdk"
    id: "update-neg"
    entrypoint: bash
    args:
      - "-c"
      - |
        echo "Verifying NEG (Network Endpoint Groups) are healthy..."
        gcloud compute network-endpoint-groups list --filter="name~run-remix" || echo "NEGs configured via Terraform/Console"
        echo "Global Load Balancer will automatically route to healthy regions"

images:
  - "gcr.io/$PROJECT_ID/run-remix:$SHORT_SHA"

options:
  logging: CLOUD_LOGGING_ONLY
  machineType: "E2_HIGHCPU_8"
  
timeout: "1800s"  # 30 minutes for multi-region deployment