Mercator is a templating wrapper for the excellent Kubernetes Helm package manager.
Mercator’s "Projections" allow complex deployment configurations to be captured while minimizing duplication of value files. This is particularly helpful in cases where two disparate environments have a great deal of overlap, but not 100%, such as a test environment where hostnames or secrets may differ, but port exposures and deployment layouts are identical. It could also be used in deployments where a number of services are deployed from a shared chart.
Mercator acts as a "first-pass" templater, much like Helm. Projection information is captured in a .yaml
(default "projection.yaml")
file and referenced in a "source" values file (default "src.values.yaml") using the general syntax [[ .Projection.fieldName ]].