Yes, it’s possible to have multiple values files with Helm. Just use the --values flag (or -f).
Example:
helm install ./path --values ./internalValues.yaml --values ./customSettings.yaml
You can also pass in a single value using --set.
Example:
helm install ./path --set username=ADMIN --set password=${PASSWORD}
From the official documentation:
There are two ways to pass configuration data during install:
–values (or -f): Specify a YAML file with overrides. This can be specified multiple times and the rightmost file will take precedence
–set (and its variants –set-string and –set-file): Specify overrides on the command line.
If both are used, –set values are merged into –values with higher precedence. Overrides specified with –set are persisted in a configmap. Values that have been –set can be viewed for a given release with helm get values . Values that have been –set can be cleared by running helm upgrade with –reset-values specified.