Release v0.26.1

Release v0.26.0

- Fix disk partition discovery for brtfs
- Add ZFS support
- Add UDP metrics (collection disabled by default)
- Improve diskio prometheus metrics
- Update Prometheus godeps to v0.8
- Add overlay2 storage driver support

Release v0.24.2

Release v0.25.0

Release v0.24.0

Cherry-pick release

- Ensure minimum kernel version for thin_ls