Support persistent storage for InfluxDB backend.

[vishh]

As of now InfluxDB pod uses local storage.

[pires]

+1

[vishh]

Excepting local disk none of the existing Storage solutions in kubernetes works for all the users. I am thinking the best way to address this issue is to provide a cookbook of storage recipes in the repo and make the users choose one based on their deployment.
We can simplify this by having a deployment binary with simple flags.
Any thoughts @pires ?

[jimmidyson]

I think by default we should be using an empty-dir volume, but as we're seeing with lots of things this is deployment/implementation specific. A deployment binary might be a good idea, but we really need this to be in the influxdb manifest at the very least.

[pires]

I agree with @jimmidyson. I think it's up to the user to adopt whatever storage strategy he/she is more comfortable with. In the end, I'd really like to see something like flocker coming into Kubernetes, but right now it's too early to decide on an approach other than empty-dir.

[piosz]

closing in favor of #1197