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csi-nfs's Introduction

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info Note: All hosted unstable and staged binaries older than 0.11.2-rc1 have been pruned due to quota restrictions.


The long-term goal of the REX-Ray project is to enable collaboration between organizations focused on creating enterprise-grade storage plugins for the Container Storage Interface (CSI). As a rapidly changing specification, CSI support within REX-Ray will be planned when CSI reaches version 1.0, currently projected for a late 2018 release. In the interim, there remains active engagement with the project to support the community.

REX-Ray provides a vendor agnostic storage orchestration engine. The primary design goal is to provide persistent storage for Docker, Kubernetes, and Mesos.

It is additionally available as a Go package, CLI tool, and Linux service which enables it to be used for additional use cases.

Documentation Docs

You will find complete documentation for REX-Ray at rexray.readthedocs.org, including licensing and support information. Documentation provided at RTD is based on the latest stable build. The /.docs directory in this repo will refer to the latest or specific commit.

Architecture

REX-Ray is available as a standalone process today and as a distributed model of client-server. The client performs a level abstraction of local host processes (request for volume attachment, discovery, format, and mounting of devices) while the server provides the necessary abstraction of the control plane for multiple storage platforms/

Storage Provider Support

The following storage providers and platforms are supported by REX-Ray.

Provider Storage Platform Docker Containerized
Amazon EC2 EBS
EFS
S3FS
Ceph RBD
Dell EMC Isilon
ScaleIO
DigitalOcean Block Storage
FittedCloud EBS Optimizer
Google GCE Persistent Disk
Microsoft Azure Unmanaged Disk
OpenStack Cinder
VirtualBox Virtual Media

Operating System Support

The following operating systems are supported by REX-Ray:

OS Command Line Service
Ubuntu 12+
Debian 6+
RedHat
CentOS 6+
CoreOS
TinyLinux (boot2docker)
OS X Yosemite+
Windows

Installation

The following command will install the REX-Ray client-server tool. If using CentOS, Debian, RHEL, or Ubuntu the necessary service manager is used to bootstrap the process on startup

curl -sSL https://rexray.io/install | sh -

Runtime - CLI

REX-Ray can be run as an interactive CLI to perform volume management capabilities.

$ export REXRAY_SERVICE=ebs
$ export EBS_ACCESSKEY=access_key
$ export EBS_SECRETKEY=secret_key
$ rexray volume ls
ID            Name  Status    Size
vol-6ac6c7d6        attached  8

Runtime - Service (Docker)

Additionally, it can be run as a service to support Docker, Mesos, and other platforms that can communicate through HTTP/JSON.

$ export REXRAY_SERVICE=ebs
$ export EBS_ACCESSKEY=access_key
$ export EBS_SECRETKEY=secret_key
$ rexray service start
Starting REX-Ray...SUCCESS!

  The REX-Ray daemon is now running at PID XX. To
  shutdown the daemon execute the following command:

    sudo /usr/bin/rexray stop

$ docker run -ti --volume-driver=rexray -v test:/test busybox
$ df -h /test

Runtime - Docker Plugin

Starting with Docker 1.13, Docker now supports a new plugin architecture in which plugins can be installed as containers.

$ docker plugin install rexray/ebs EBS_ACCESSKEY=access_key EBS_SECRETKEY=secret_key
Plugin "rexray/ebs:latest" is requesting the following privileges:
 - network: [host]
 - mount: [/dev]
 - allow-all-devices: [true]
 - capabilities: [CAP_SYS_ADMIN]
Do you grant the above permissions? [y/N] y
latest: Pulling from rexray/ebs
2ef3a0b3d192: Download complete
Digest: sha256:86a3bf7fdab857c955d7ef3fb94c01e350e34ba0f7fd3d0bd485e45f1592e1c2
Status: Downloaded newer image for rexray/ebs:latest
Installed plugin rexray/ebs:latest

$ docker plugin ls
ID                  NAME                   DESCRIPTION              ENABLED
450420731dc3        rexray/ebs:latest      REX-Ray for Amazon EBS   true

$ docker run -ti --volume-driver=rexray/ebs -v test:/test busybox
$ df -h /test

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csi-nfs's Issues

Problem mounting under Docker

@clintkitson was kind enough to toss in on rexray/rexray#1114 and once it was clear how to specify options, a lot more made sense.

That said, I think there may be a compatibility issue with the plugin as I built up in rexray/rexray#1114 (comment) over several comments. The mount is happening, but at a directory name that includes a :. Docker seems to be parsing that and dropping the colon and everything after it as it tries to map the external volume.

Specifying security type of mount

It's unclear how to specify a mount option such as sec=sys. When using a NFSv4 volume from a modern operating system, the negotiation will naturally take the highest level of security that is available.

Unfortunately, if that resolves to krb5, an arbitrary container is unlikely to have a ticket or the ability to acquire one. In that case, the contents of the volume will either be inaccessible or mapped to nobody. sec=sys is not ideal, but sufficient in a controlled security context.

Apologies if this is already addressed and I missed it in the documentation.

Perform bind-mounts of volumes

Right now the NFS plugin is mounting directly to the requested path. The desired workflow is what is implemented in blockdevices already, which is to mount the volume in a private directory, then to bind-mount the volume to target. It is likely that logic from blockdevices can be re-used.

gpkg: A specific commit hash for GoCSI dependency

Hi,

I think it makes sense to update the Gopkg.toml file with a specific commit hash for GoCSI:

[[constraint]]
  branch = "master"
  name = "github.com/codedellemc/gocsi"

I'd switch branch for version (which is recommended by the Gopkg docs) and point to a specific Git ref or tag. Otherwise this is a sliding dependency that will change every time the lock file is updated from the toml file.

does rexray/csi-nfs work with kubernetes?

i was able to create the volume with docker. But now i want to use that volume in a kubernetes cluster.

[root@csi-nfs-node1 docker]# docker volume create -d rexray/csi-nfs -o host=xxxxxx -o export=/data csi-nfs-volume

[root@csi-nfs-node1 docker]# docker volume ls
DRIVER VOLUME NAME
rexray/csi-nfs:latest csi-nfs-volume

I created both a pv and pvc. I notice that kubernetes does not like the driver name rexray/csi-nfs, so i removed rexray.

When i go to launch my nginx pod, it can't mount the volume. Wondering if anyone else tried it.
Thanks..

apiVersion: v1
kind: PersistentVolume
metadata:
creationTimestamp: null
labels:
io.kompose.service: csi-data-volume
name: csi-data-volume
spec:
storageClassName: manual
capacity:
storage: 100Mi
accessModes:

  • ReadWriteOnce
    csi:
    driver: csi-vfs
    volumeHandle: csi-volume

apiVersion: v1
kind: PersistentVolume
metadata:
creationTimestamp: null
labels:
io.kompose.service: csi-data-volume
name: csi-data-volume
spec:
storageClassName: manual
capacity:
storage: 100Mi
accessModes:

  • ReadWriteOnce
    csi:
    driver: csi-vfs
    volumeHandle: csi-nfs-volume

apiVersion: v1
kind: Pod
metadata:
name: nginx
spec:
containers:

  • name: nginx
    image: nginx:1.7.9
    ports:
    • containerPort: 80
      volumeMounts:
    • mountPath: "/work"
      name: data-volume
      volumes:
    • name: data-volume
      persistentVolumeClaim:
      claimName: csi-nfs-data-claim
      status: {}

CIFS support

I am looking for a way to do persistent storage for docker swarm, and understand that Rex-Ray and csi-nfs could be a solution. However, I only have access to a cifs drive.

Would it be possible to extend this driver to support other types of network filesystems as well? I guess it is just a matter of doing a few changes to the code.

README.md file is obsolete?

Today I tried to test the csi-nfs as a storage plugin, according to the README.md document, seem below csc command is out of date:

$ csc gets
0.0.0
$ csc getp -version 0.0.0
csi-nfs	0.1.0
$ csc cget -version 0.0.0
LIST_VOLUMES
$ showmount -e 192.168.75.2
Exports list on 192.168.75.2:
	/data                             192.168.75.1
$ mkdir /mnt/test
$ csc mnt -version 0.0.0 -targetPath /mnt/test -mode 1 host=192.168.75.2 export=/data
$ ls -al /mnt/test
total 1
drwxr-xr-x   2 root  wheel    18 Jul 22 20:25 .
drwxrwxrwt  85 root  wheel  2890 Aug 17 15:32 ..
-rw-r--r--   1 root  wheel     0 Jul 22 20:25 test
$ csc umount -version 0.0.0 -targetPath /mnt/test host=192.168.75.2 export=/data
$ ls -al /tmp/mnt
total 0
drwxr-xr-x   2 travis  wheel    68 Aug 16 15:01 .
drwxrwxrwt  85 root    wheel  2890 Aug 17 15:32 ..

The output of the csc in my system is:

# csc
NAME
    csc -- a command line container storage interface (CSI) client

SYNOPSIS
    csc [flags] CMD

AVAILABLE COMMANDS
    controller
    identity
    node

Use "csc -h,--help" for more information

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