Add a nfs storage driver

[stgraber]

nfs would be a small shim storage driver on top of our dir driver that would handle mounting the NFS share as needed on all servers within the cluster.

This should be restricted to only custom volumes and only filesystem type volumes for those as storing block/loop files on top of NFS seems like a bad idea and most NFS servers aren't quite POSIX enough to properly handle full containers (locking is always a bit weird).

[vivekkoya]

Hello, I can try this task. Can you please direct me to the relevant directories and files? Thanks

[stgraber]

The relevant files are in internal/server/storage/drivers/.

We did something similar to that with the lvmcluster driver which is just a tiny shim around the lvm driver.

In the case of nfs we should do something a bit more complete, so it should get its own file and own struct, but that struct should inherit from the dir struct and just override behavior where needed.

[stgraber]

hey @vivekkoya, how are things going? Need any help?

[vivekkoya]

Yes, I need help. I am mainly a java programmer studying in university. I am new to Go network programming. Do you recommend any resources to learn Go?

[stgraber]

https://go.dev/learn/ has some useful resources, especially the online sandbox that lets you play with some of the concepts at https://go.dev/tour/welcome/1.

The syntax shouldn't be much of an issue coming from Java, but the usual things to learn for Go are going to be:

• Synchronization (Go routines, channels, locking, ...)
• Different handling for return values (multiple variables being returned)
• Getting familiar with the Go standard library which has a LOT of common packages, types and functions