This guide walks you through deploying a Rails app to DigitalOcean using Kamal.
deploy.yml – Main deployment configuration.secrets – Stores sensitive credentials (never commit this to Git!).In your secrets file:
| Variable | Description |
|---|---|
KAMAL_REGISTRY_PASSWORD |
Your Docker Hub personal access token (generate it in Docker Hub settings). |
RAILS_MASTER_KEY |
Found in config/master.key in your Rails app. This is required to decrypt Rails credentials. |
Example:
bash
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# From your password manager — never commit this!
KAMAL_REGISTRY_PASSWORD=your_dockerhub_token
RAILS_MASTER_KEY=your_master_key
⚠️ Security Tips:
config/master.key or .env files to GitHub.deploy.ymlSet this to your app name:
yaml
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service: twitterclone