Category Archives: Uncategorized

unprivileged btrfs clones

In 14.04 you can create unprivileged container clones usign overlayfs. Depending on your use case, these can be ideal, since the delta between your cloned and original containers is directly accessible as ~/.local/share/lxc/clonename/delta0/, ready to rsync. However, that is not … Continue reading

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Xspice in containers

For some time I’ve been wanting to run ubuntu-desktop and others, remotely, in containers, using spice. Historically vnc has been the best way to do remote desktops, but spice should provide a far better experience. Unfortunately, Xspice has always failed … Continue reading

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Nested lxc

One of the core features of cgmanager is to easily, safely, and transparently support the cgroup requirements of container nesting. Processes can administer cgroups exactly the same way whether inside a container or not. This also makes nested lxc very … Continue reading

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Introducing cgmanager

LXC uses cgroups to track and constrain resource use by containers. Historically cgroups have been administered through a filesystem interface. A root owned task can mount the cgroup filesystem and change its current cgroup or the limits of its cgroup. … Continue reading

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Upcoming Qemu changes for 14.04

Qemu 2.0 is looking to be released on April 4. Ubuntu 14.04 closes on April 10, with release on April 17. How’s that for timing. Currently the qemu package in trusty has hundreds of patches, the majority of which fall … Continue reading

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Emulating tagged views in unity

I like tagged tiling window managers. I like tiling because it lets me avoid tedious window move+resize. I like tagged wm because I can add multiple tags to windows so that different tag views can show different subsets of my … Continue reading

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Quickly run Ubuntu cloud images locally using uvtool

We have long been able to test Ubuntu isos very easily by using ‘testdrive’. It syncs releases/architectures you are interested in and starts them in kvm. Very nice. But nowadays, in addition to the isos, we also distribute cloud images. … Continue reading

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