Infrastructure & IaC
cloud-init Syntax Checker
Check cloud-init configurations for syntax errors, unsupported directives, and common misconfigurations before launch.
Calculations run locally in your browserTool
About this tool
cloud-init Syntax Checker
Validate cloud-init before the instance boots, not after.
• Infrastructure planning
• CI/CD validation
• Cost estimation
Next step
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FAQ
What does this tool tell you?
Validate cloud-init before the instance boots, not after.
What affects the result most?
cloud-init YAML: #cloud-config header required — plain YAML without header is not processed. write_files: content can be plain text, gzip+base64, or base64 — encoding field required for binary. runcmd: runs commands on first boot — not idempotent, not re-run on instance restart.
How should I use the result?
Treat the tool's output as a first-pass check, not a proof of correctness. A clean pass means no issues in the patterns this tool recognizes; a failure points to a specific problem you can investigate in your source. The underlying spec is the authoritative source for edge cases.
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