This adds `releases[].labels` in which you can set arbitrary number of key-value pairs, so that commands like `helmfile sync --selector key=value` can be used to run the helmfile subcommand against a subnet of declared releases.
`labels` and `selector` are named as such on purpose of being consistent with terminology of Kubernetes and other tools in the K8S ecosystem, including kubectl, stern, helm, and so on.
Resolves#8
So that our user can start leveraging helmfile without too much confusion.
Includes two things:
- A "getting started" guide
- A basic description of the `sync` subcommand
This is important for deployments where the chart repo is protected by client cert validation.
helmfile.yaml is extended to support `certFile` and `keyFile`:
```
repositories:
- name: roboll
url: http://roboll.io/charts
certFile: optional_client_cert
keyFile: optional_client_key
```
Everything works the same if you don't provide values for them.
Regarding the implementation, the "helm repo add" command already supports the cert-file and key-file values, so we just have to pass them through.
Shane Starcher
KUOKA Yusuke
Daniel
Cedric Meury
Alex Withrow
Greg Burton
jayste
Karl Fischer
Justin Nauman
Nathan Vecchiarelli
rob boll