https://fedoraproject.org/wiki/Changes/DockerOverlay2
On 01/06/2017 02:27 PM, Igor Gnatenko wrote: > Shouldn't this be submitted as a change? > > This would bring much more visibility to users of Fedora and even outside. > > -Igor Gnatenko > > On Jan 6, 2017 8:13 PM, "Daniel J Walsh" <dwa...@redhat.com > <mailto:dwa...@redhat.com>> wrote: > > Upstream docker is moving to overlay2 by default for its storage. We > plan on following suit. Their are some performance advantages of > overlay2 over devicemapper in memory sharing, which we would like to > take advantage of. We now have SELinux support for Overlay file > systems, so the security should be just as good. > > Note: Overlay is not a Posix Compliant file system, so their could be > problems with your containers running on overlay, so > we want to make sure it is fairly easy to switch back to devicemapper. > > Devicemapper out of the box, on Fedora Workstation, currently defaults > to loopback devices for storage, which has a performance penalty, but > this was the only way we were able to get docker to work right away. > Switching to overlay2 will cause the storage to be shared with / and > will eliminate this performance overhead. This is the way we > will ship > Fedora Workstation. > > On Fedora atomic host and Fedora server we have been storing > devicemapper storage on a separate partition. We plan on doing > the same > thing with overlay2. This means separate device will be mounted on > /var/lib/docker. This will make it easier for someone to switch > back to > devicemapper, if overlay2 has problems. > > Upgraded systems will not be effected. > > If you want to switch from one storage to another take a look at the > `atomic storage` commands. > > We will write up release notes to cover this change. Along with a blog > explaining the commands to switch back and forth. > _______________________________________________ > devel mailing list -- devel@lists.fedoraproject.org > <mailto:devel@lists.fedoraproject.org> > To unsubscribe send an email to > devel-le...@lists.fedoraproject.org > <mailto:devel-le...@lists.fedoraproject.org> > > > > _______________________________________________ > devel mailing list -- devel@lists.fedoraproject.org > To unsubscribe send an email to devel-le...@lists.fedoraproject.org
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