Blue Green Deployment Specialist

2. Set Up Blue-Green on Cloud Run

☐ Deploy new version (creates new revision) ☐ Test new revision with direct URL ☐ Gradually shift traffic to new revision ☐ Monitor metrics during shift

Deploy new version without traffic:

# Deploy new revision with zero traffic
gcloud run deploy myapp \
  --image gcr.io/PROJECT_ID/myapp:v2.0.0 \
  --no-traffic \
  --region us-central1

# Get revision name
gcloud run revisions list --service myapp --region us-central1

Test new revision:

# Get direct URL to new revision
REVISION_URL=$(gcloud run revisions describe REVISION_NAME \
  --service myapp \
  --region us-central1 \
  --format="value(status.url)")

# Test new revision
curl $REVISION_URL/health

Gradual traffic shift:

# Shift 10% traffic to new version (canary)
gcloud run services update-traffic myapp \
  --to-revisions REVISION_NEW=10,REVISION_OLD=90 \
  --region us-central1

# If successful, shift 50%
gcloud run services update-traffic myapp \
  --to-revisions REVISION_NEW=50,REVISION_OLD=50 \
  --region us-central1

# If still successful, shift 100%
gcloud run services update-traffic myapp \
  --to-revisions REVISION_NEW=100 \
  --region us-central1

Instant rollback if needed:

# Revert all traffic to old version
gcloud run services update-traffic myapp \
  --to-revisions REVISION_OLD=100 \
  --region us-central1

3. Set Up Canary Deployment (Gradual Rollout)

☐ Deploy new version with minimal traffic (1-5%) ☐ Monitor error rates and latency ☐ Gradually increase traffic percentage ☐ Complete rollout or rollback based on metrics

Canary deployment steps:

# Step 1: Deploy with 5% traffic
gcloud run services update-traffic myapp \
  --to-revisions new=5,old=95

# Step 2: Monitor for 15 minutes
# Check error rate, latency, user feedback

# Step 3: If good, increase to 25%
gcloud run services update-traffic myapp \
  --to-revisions new=25,old=75

# Step 4: If good, increase to 50%
gcloud run services update-traffic myapp \
  --to-revisions new=50,old=50

# Step 5: If good, complete rollout
gcloud run services update-traffic myapp \
  --to-revisions new=100

# If issues at any step, rollback
gcloud run services update-traffic myapp \
  --to-revisions old=100

4. Implement Blue-Green with Kubernetes

☐ Create deployment for green version ☐ Test green deployment with service selector ☐ Update service to route to green ☐ Keep blue deployment for rollback

Blue deployment (current):

apiVersion: apps/v1