On 07/17/2013 04:39 AM, Jaroslav Reznik wrote:
= Proposed Self Contained Change: Snapshot and Rollback Tool =
https://fedoraproject.org/wiki/Changes/Rollback
Change owner(s): Stephen Gallagher <sgall...@redhat.com>, Colin Walters
<walt...@redhat.com>
With the advent of thinly-provisioned LVM pools, it has become possible for us
to implement full-system LVM snapshotting for recording rollback points. We
are planning to support this for yum updates and eventually fedup upgrades
going forwards. This change request notes the addition of new tools provided
by the roller-derby project to present an interface and a CLI for managing and
initiating rollbacks.
== Detailed description ==
The roller-derby project will be providing a library and a CLI for creating,
labeling and managing LVM snapshots (plus non-LVM backups of /boot), oriented
primarily towards rpm-managed data, but useful beyond that. The yum plugin
"yum-plugin-fs-snapshot" will be updated to consume this library and save the
system state in a compatible format. The roller-derby CLI tool will provide an
interactive and scriptable interface for manipulating these snapshots and
determining when to remove older ones. It will also allow the tagging of
snapshots as "known-good", to be skipped when automatically-trimming for
space. The roller-derby project will likely provide a small daemon to keep
track of the available space in the LVM pool to proactively clean up snapshots
before the system runs out of space.
In order to prevent "loss" of data when rebooting into an snapshot, the
roller-derby CLI will allow saving a snapshot of the current state before
rolling back and will provide tools to allow mounting of that current state to
recover changes that have occurred since the rollback point.
== Scope ==
The scope of this project is the completion of the initial release of the
roller-derby project and the inclusion of thinly-provisioned LVM as an option
in the Anaconda installer [1].
Proposal owners: We need to complete the roller-derby project. Other than the
Anaconda change referenced above, all dependencies are available in Fedora
already.
Other developers: OS Installer Support for LVM Thin Provisioning
Release engineering: N/A (not a System Wide Change)
Policies and guidelines: N/A (not a System Wide Change)
[1] https://fedoraproject.org/wiki/Changes/InstallerLVMThinProvisioningSupport
I this project dead? I'm casting about to tools to manage lvm snapshots and
roller-derby sounded promising. Any other tools out there?
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