feat(core): add chart-values HTTP service#48
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Add chart-values-controller: an HTTP service that returns a chart's values.yaml before installation, so external in-cluster apps can preview chart parameters. The service reuses nelm-source-controller: on request it ensures an auxiliary HelmChart (Helm repos) or OCIRepository (OCI repos), waits for the artifact, downloads and extracts values.yaml, and caches it. - API: POST /v1/chart-values, async 202 + polling, stable machine-readable error codes with English messages. - Cache: content served from an emptyDir file cache keyed by the auxiliary resource name; a watch controller with a revision-change predicate keeps entries fresh, so ready charts are served without Kubernetes calls. - Atomic, lock-free cache writes (unique temp file + rename) safe under concurrent requests for the same chart. - TTL controller removes idle auxiliary resources and their cache entries. - Configurable max chart size via --max-chart-size-mb; guards against oversized artifacts and decompression bombs. - Auxiliary resources named tmp-<repo>-<chart>-<hash>. - Deployed as a single replica; kube-rbac-proxy fronts the API (TLS via the shared rootCA-signed cert, SubjectAccessReview auth) and metrics. Signed-off-by: Ilya Drey <ilya.drey@flant.com>
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Signed-off-by: Ilya Drey <ilya.drey@flant.com>
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Add chart-values-controller: an HTTP service that returns a chart's values.yaml before installation, so external in-cluster apps can preview chart parameters.
The service reuses nelm-source-controller: on request it ensures an auxiliary HelmChart (Helm repos) or OCIRepository (OCI repos), waits for the
artifact, downloads and extracts values.yaml, and caches it.
error codes with English messages.
resource name; a watch controller with a revision-change predicate keeps
entries fresh, so ready charts are served without Kubernetes calls.
shared rootCA-signed cert, SubjectAccessReview auth) and metrics.