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Loading data values from a JSON file

JSON is valid YAML. That is, YAML syntax is a superset of JSON syntax.

So, YAML parsers naturally parse JSON.

$ ytt --data-value-yaml "stable_config=$( cat stable_config.json )" -f cluster-template-paving.yaml -f values.yml

Note: the values.yml needs to be present for ytt at the time of writing because data values specified on the command-line are each applied as an overlay with default matching (i.e. matches exactly one node).

#@ load("@ytt:data", "data")
foo: #@ data.values.stable_config.vpc_id
#@data/values
---
stable_config: {}
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