liftoff

README

liftoff

Welcome to liftoff 🚀 Your go‑to CLI for multi‑region Cloud Run canary deployments! This README will guide you through installation, configuration, and usage with plenty of examples and emojis to keep things fun 🎉.

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🛠️ Installation

Make sure you have Go 1.20+ installed and your GOPATH configured. Then:

# Install the CLI
go install github.com/yourorg/liftoff/cmd/liftoff@latest

# Verify installation
liftoff --help

You can also build from source:

git clone https://github.com/yourorg/liftoff.git
cd liftoff
go build -o liftoff ./cmd/liftoff

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⚙️ Configuration

By default, liftoff saves your settings to $TMP/liftoff_config.json. You can override options via flags or environment variables.

Option	Env Var	Description	Default
--project	LIFTOFF_PROJECT	GCP project ID	none (required)
--service	LIFTOFF_SERVICE	Cloud Run service name	none (required)
--image	LIFTOFF_IMAGE	Container image URL for the canary revision	none (required)
--regions	LIFTOFF_REGIONS	Comma‑separated GCP regions (e.g. europe-west2,europe-west4)	europe-west2,europe-west4
--percentages	LIFTOFF_PCTS	Traffic percentages (e.g. 10,50,100)	10,50,100
--intervals	LIFTOFF_INTVLS	Seconds between rollout steps (e.g. 300,300)	300,300
--env-vars	LIFTOFF_ENV_VARS	Comma-separated KEY=VALUE pairs	none (required)

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Once you have liftoff installed, here are some example workflows:

🎯 Default canary rollout

liftoff canary \
  --project=my-gcp-project \
  --service=my-service \
  --image=gcr.io/my-gcp-project/my-app:canary

• Deploys no-traffic revisions in europe-west2 & europe-west4.
• Routes 10% → wait 5m → 50% → wait 5m → 100%.

🌐 Custom regions & speed

liftoff canary \
  --project=my-gcp-project \
  --service=api-service \
  --image=gcr.io/my-gcp-project/api:v2 \
  --regions=us-central1,asia-northeast1 \
  --percentages=5,25,50,100 \
  --intervals=60,120,180

• Targets us-central1 and asia-northeast1.
• Gradually shifts traffic 5% → wait 1m → 25% → wait 2m → 50% → wait 3m → 100%.

🌳 Environment variables

liftoff canary \
  --project=my-gcp-project \
  --service=api-service \
  --image=gcr.io/my-gcp-project/api:v2 \
  --regions=us-central1,asia-northeast1 \
  --percentages=5,25,50,100 \
  --intervals=60,120,180 \
  --env-vars=GOOGLE_PROJECT_ID=canary,DEBUG=true"

⚡ Instant full rollout

liftoff canary \
  --project=my-gcp-project \
  --service=static-site \
  --image=gcr.io/my-gcp-project/site:latest \
  --percentages=100 \
  --intervals=0

• Skips staging phases and sends 100% traffic immediately.

🛠️ Saving defaults per service

# Save defaults for 'internal-api'
liftoff config set internal-api \
  --project=my-gcp-project \
  --image=gcr.io/my-gcp-project/internal-api:canary \
  --regions=europe-west2,europe-west4 \
  --percentages=10,50,100 \
  --intervals=300,300

# View all saved configs
liftoff config view

🔍 Flags & Commands Reference

liftoff --help

liftoff canary --help

Key flags for canary:

• --project, -p : GCP project ID (required)
• --service, -s : Cloud Run service name (required)
• --image, -i : Container image URL (required)
• --regions : Regions list
• --percentages : Traffic split percentages
• --intervals : Seconds between shifts

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❤️ Contributing

We ❤️ pull requests!

1. Fork ✅
2. Create a feature branch 🌿
3. Write tests 🧪
4. Send PR 📬

Please follow our Contributing Guidelines.

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📜 License

MIT

Enjoy safe liftoffs! 🚀