On 05/22/2015 10:13 PM, Colin Walters wrote:
There's a new release of docker-storage-setup available via
this GPG signed git tag:
https://github.com/projectatomic/docker-storage-setup/releases/tag/v0.5
The changes are listed here:
https://github.com/projectatomic/docker-storage-setup/blob/e075395113b85d88c152e80c76d5560d89973882/NEWS.md
I'll build this into Fedora rawhide today, and I'd like to update the stable
stream
after it's gotten some testing.
Release notes reproduced below for convenience:
0.5
This release has many changes contributed primarily by Vivek Goyal.
Docker pool just uses 60%, and will auto-grow using LVM
docker-storage-setup: Reserve 60% of free space for data volume
docker-storage-setup: Enable automatic pool extension using lvm facilities
docker-storage-setup: Do not grow data volumes upon restart
These three changes mean that storage is now more dynamic in a more reliable
fashion.
Previously, the pool would use all configured space, which meant things like
Docker volumes or regular host storage would be limited to the OS default (for
Project Atomic, 3G). With this change, the root LV can be grown by the system
administrator dynamically.
The growing of the Docker pool is now managed by LVM dynamically, and will not
be automatically resized whenever d-s-s runs (normally once on boot).
Growpart logic reworked
In cloud environments, a "growpart" logic is common where the partition table
is changed on first boot with extra storage provided by the hypervisor.
However, one essentially never wants to do this with real physical disks.
The growpart logic is disabled by default, and virtualization images should be
tweaked to turn it on. For example, the Fedora spin-kickstarts git module has a
kickstart file with a %post that would be an appropriate place.
Performance optimizations
docker-storage-setup: Skip block zeroing in thin pool
docker-storage-setup: Use chunk size 512K by default
Will make Docker devicemapper usage faster.
Test results for different chunksizes can be found here
https://github.com/projectatomic/docker-storage-setup/issues/31#issuecomment-104387530
Cheers
Elvir Kuric
