GRPC Server implementation of CSI spec for Cinder

This repo is an experimentation repo to try some different things with CSI and Cinder. The main idea here being to see if it's feasible to omit the shim layer and usage of Gophercloud (don't get me wrong, Gophercloud is awesome), but the idea here is that it should be possible to just drop in a replacement for Cinder's current REST API service (ie just run a GRPC server that implements the CSI spec).

We just use the standard grpc generation tools, just like we do with any CSI driver, but we generate the output files in Python instead of Golang.

As a result, we can just drop this server into a Cinder deployment and provide its endpoint to our CSI client and get CSI natively (ish) in Cinder.

The server file to do this is csi_server.py

The server file to do this is direct_server.py

NOTE All of this is offensively INCOMPLETE right now, this is just place to try some things out, and provide examples of ideas.

Not much here, but we can test basic connection to a csi client and the ability to send requests directly out to a running cinder install.

I used the rexray csc tool for this, here's the basic outline to try things out:

Update the cloud variables in the csi_server.py file to have the right endpoint and credential info for you, then just run the server:

or

  python ./direct_server.py

You should be greeted with a "now serving..." message when it's ready. Note that we serve up on prot 50051 for now.

Next grab the rexray csc (may be out of date, but good enough for a starting point): https://github.com/rexray/gocsi/tree/master/csc

Make and install the csc tool, then you can start messing around with things:

        --log-level=debug \
        -e tcp://10.117.33.4:50051 \
        muahuahhuah

Note the example above is specifying use of a tcp socket and the IP specified is the IP of the node running the csi_server.

You can also delete the volumes you created by UUID or Name:

        --log-level=debug \
        -e tcp://10.117.33.4:50051 \
        9813254f-d46e-4683-aa0d-998f9dc5fa0c

List is broken(well lots of things are missing or broken), but hey... PR's are WELCOME :)