F20 Self Contained Change: Snapshot and Rollback Tool

[Orion Poplawski]

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 <sgallagh at redhat.com>, Colin Walters
> <walters at 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?


-- 
Orion Poplawski
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