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https://github.com/cirocosta/xfsvol
Local Docker Volumes with XFS Project Quota
https://github.com/cirocosta/xfsvol
docker docker-plugin go golang pquota quota storage volumes xfs
Last synced: about 7 hours ago
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Local Docker Volumes with XFS Project Quota
- Host: GitHub
- URL: https://github.com/cirocosta/xfsvol
- Owner: cirocosta
- Created: 2017-07-17T22:03:22.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2018-05-30T00:07:43.000Z (over 6 years ago)
- Last Synced: 2024-04-14T23:20:05.891Z (6 months ago)
- Topics: docker, docker-plugin, go, golang, pquota, quota, storage, volumes, xfs
- Language: Go
- Homepage:
- Size: 4.36 MB
- Stars: 30
- Watchers: 7
- Forks: 7
- Open Issues: 10
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
xfsvol 📂
Docker Volume Plugin for managing local XFS-based volumes
[](https://travis-ci.org/cirocosta/xfsvol)
## Quickstart
1. Create a mountpoint at `/mnt/xfs` and a directory `/mnt/xfs/volumes`.
For testing purposes this mountpoint can be a loopback device (note: use a loopback device for testing purposes only).
```sh
sudo dd if=/dev/zero of=/xfs.1G bs=1M count=1024
sudo losetup /dev/loop0 /xfs.1G
sudo mkfs -t xfs -n ftype=1 /dev/loop0
sudo mkdir -p /mnt/xfs/volumes
sudo mount /dev/loop0 /mnt/xfs -o pquota
```
2. Install the plugin
```
docker plugin install \
--grant-all-permissions \
--alias xfsvol \
cirocosta/xfsvol
docker plugin ls
ID NAME DESCRIPTION ENABLED
06545b643c6a xfsvol:latest Docker plugin to manage XFS-mounted volumes true
```
3. Create a named volume
```
docker volume create \
--driver xfsvol \
--opt size=10M \
myvolume1
```
4. Run a container with the volume attached
```
docker run -it \
-v myvolume1:/myvolume1 \
alpine /bin/sh
dd if=/dev/zero of=/myvolume1/file bs=1M count=100
(fail!)
```
5. Check the volumes list
```
docker volume ls
DRIVER VOLUME NAME
xfsvol:latest myvolume1 (1.004MB)
local dockerdev-go-pkg-cache-gopath
local dockerdev-go-pkg-cache-goroot-linux_amd64
local dockerdev-go-pkg-cache-goroot-linux_amd64_netgo
```
and the `xfsvolctl` utility:
```
sudo /usr/bin/xfsvolctl ls --root /mnt/xfs/volumes/
NAME QUOTA
ciro 1.004 MB
```
## `xfsvolctl`
This tool is made to help inspect the project quotas created under a given root path as well as create/delete others. It's usage is documented under `--help`:
```
xfsvolctl --help
NAME:
xfsvolctl - Controls the 'xfsvol' volume plugin
USAGE:
xfsvolctl [global options] command [command options] [arguments...]
VERSION:
0.0.0
COMMANDS:
ls Lists the volumes managed by 'xfsvol' plugin
create Creates a volume with XFS project quota enforcement
delete Deletes a volume managed by 'xfsvol' plugin
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS:
--help, -h show help
--version, -v print the version
```
### Under the hood
```
$ sudo mkdir -p /mnt/xfs/tmp/bbb
$ sudo strace -f xfsvolctl create \
--root /mnt/xfs/tmp/bbb \
--name ccc \
--size 1024 \
--inode 1024
stat("/mnt/xfs/tmp/bbb", {st_mode=S_IFDIR|0755, st_size=6, ...}) = 0
unlinkat(AT_FDCWD, "/mnt/xfs/tmp/bbb/backingFsBlockDev", 0) = -1 ENOENT (No such file or directory)
mknodat(AT_FDCWD, "/mnt/xfs/tmp/bbb/backingFsBlockDev", S_IFBLK|0600, makedev(7, 0)) = 0
quotactl(Q_XSETQLIM|PRJQUOTA, "/mnt/xfs/tmp/bbb/backingFsBlockDev", 1, {version=1, flags=XFS_PROJ_QUOTA, fieldmask=0xc, id=1, blk_hardlimit=0, blk_softlimit=0, ino_hardlimit=0, ino_softlimit=0, bcount=0, icount=0, ...}) = 0
...
mkdirat(AT_FDCWD, "/mnt/xfs/tmp/bbb/ccc", 0755) = 0
open("/mnt/xfs/tmp/bbb/ccc", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFDIR|0755, st_size=6, ...}) = 0
ioctl(3, FS_IOC_FSGETXATTR, 0xc4201a95e4) = 0
ioctl(3, FS_IOC_FSSETXATTR, 0xc4201a95e4) = 0
quotactl(Q_XSETQLIM|PRJQUOTA, "/mnt/xfs/tmp/bbb/backingFsBlockDev", 2, {version=1, flags=XFS_PROJ_QUOTA, fieldmask=0xc, id=2, blk_hardlimit=2, blk_softlimit=2, ino_hardlimit=1024, ino_softlimit=1024, bcount=0, icount=0, ...}) = 0
[pid 6833] ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0
// retrieving (ls)
[pid 8609] quotactl(Q_XGETQUOTA|PRJQUOTA, "/mnt/xfs/tmp/ddd/backingFsBlockDev", 2, {version=1, flags=XFS_PROJ_QUOTA, fieldmask=0, id=2, blk_hardlimit=8, blk_softlimit=8, ino_hardlimit=0, ino_softlimit=0, bcount=8, icount=104, ...}) = 0
```