Working With JSON in Terraform: locals, jsondecode, and Data Sources
Work with JSON in Terraform: jsondecode/jsonencode functions, local values, data source output parsing, and generating JSON with templatefile.
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Tags: json, terraform, developer-tools
Working With JSON in Terraform: locals, jsondecode, and Data Sources Terraform is HCL-first, but JSON is everywhere in the infrastructure it manages — IAM policies, S3 bucket policies, Lambda environment variables, API Gateway configurations, and more. Understanding how Terraform parses, generates, and manipulates JSON is essential for writing clean, maintainable infrastructure code. jsondecode() for Parsing JSON Strings converts a JSON string into a Terraform value. This is most useful when you're reading JSON from a file, a data source, or an external output. A common use case is pulling configuration out of a JSON file that's maintained separately from Terraform: produces Terraform's native types: JSON objects become maps, arrays become lists, booleans become booleans. You can then use…
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