The instructions below build a Docker image of Helm v2.15.1 and demonstrate how to run the helm template command to generate a Kubernetes YAML configuration file from a Helm Chart.
Clone this repo to helm-docker and switch to that working directory.
cd helm-docker
Build the Docker image by starting with Alpine and installing a downloaded Helm release (see Dockerfile):
docker build -t helm:v2.15.1 .
Change directory to the parent of the folder containing your Helm Chart definition files (e.g. my-chart). Then run the following, where your working directory is bind-mounted to the container's /apps working directory.
docker run --rm -v $(pwd):/apps helm:v2.15.1 template my-chart
You can output the results to a file config.yaml by redirection:
docker run --rm -v $(pwd):/apps helm:v2.15.1 template my-chart > config.yaml