The best way to learn how to make a good helm chart is to study the stable examples,
There are some command that intializes or packages the chart, on your behalf, but you still have to populate the directory with the information and resources for your chart, prior to running package or install/update.
helm create mychart - Creates a directory called mychart which contains a basic helm chart that deploys an image, and potentially exposes it via a service. You can see an example in the examples folder: examples/helm_create
helm package <path to chart> will create a zip file that you can then use as the source of your chart, and or store in scm as a release.
As a helm chart developer the best place to go for information related to building out helm charts is their documentation. https://docs.helm.sh/chart_template_guide/#the-chart-template-developer-s-guide
There you will find information about template functions, values files, built in objects, debugging, etc.
We have defined a chart in the app code repo, which can be updated with the code, and chart changes can be rolled out simultaneously.
Discuss resources included, and the templating that is occurring in this iteration.
https://github.com/redapt/favorite-beer/tree/master/spa-react-netcore-redis/voting/voting/k8s
NOTE Redis is included in this app Chart as a single helm package, this redis example is not a true HA configuration.
From this k8s folder in the app source code, with helm configured and installed to the cluster:
To use the default values:
helm upgrade --install beer Chart --set image.tag=v1 --namespace=default
You can target the denver-values using this command:
helm upgrade --install denver Chart -f denver-values.yaml --set image.tag=v1 --namespace=default