Author Archives: s3hh

RSS

When I saw the news that Google reader was going away, my first thought, like a lot of other people, was “woohoo, it’s going to be fun writing a new way to follow RSS.” This past weekend I looked at … Continue reading

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2013 Linux Security Summit CFP closing soon

Just a short reminder that if you were interested in submitting a talk for the linux security summit, the call for participation (at http://kernsec.org/wiki/index.php/Linux_Security_Summit_2013) will be closing tomorrow, Friday Jun 14. The summit will be held September 19-20 in New … Continue reading

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Introducing lxc-snap

lxc-snap: lxc container snapshot management tool BACKGROUND Lxc supports containers backed by overlayfs snapshots. The way this is typically done is to create a container backed by a regular directory, then create a new container which mounts the first container’s … Continue reading

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LXC – improved clone support

Recently I took some time to work on implementing container clones through the lxc API. lxc-clone previously existed as a shell script which could create snapshot clones of lvm and btrfs containers. There were several shortcomings to this: 1. clone … Continue reading

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gtd – managing projects

I learned about GTD 5 or 8 years ago, and pretty immediately was trying to use it. Ever since then I keep all of my information in one gtd folder, with Projects and Reference folders, a nextactions file, etc. I’ve … Continue reading

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Qemu updates in raring

The raring feature freeze took effect last week. What’s been happening with qemu in the meantime? A lot! I’ll touch on the following main changes in this post: package reorg, spice support, hugepages, uefi, and rbd support. * package reorg … Continue reading

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Experimenting with user namespaces

User namespaces are a really neat feature, but there are some subtleties involved which can make them perplexing to first play with. Here I’m going to show a few things you can do with them, with an eye to explaining … Continue reading

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User Namespaces LXC meeting

Last week we held an irc meeting to talk about user namespaces as they relate to lxc containers. The IRC log is posted at https://wiki.ubuntu.com/LxcUsernsIrcChat . I had two goals for this meeting. The first was to make sure that … Continue reading

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Call for testing: new qemu packages for raring

tl;dr If you use qemu, kvm, or qemu-user in raring, please test the candidate packages in ppa:serge-hallyn/crossc. Background The qemu and kvm projects historically had somewhat different code bases with some different features and advantages. For years they have been … Continue reading

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Full Ubuntu container confined in a user namespace

I’ve mentioned user namespaces here before, and shown how to play a bit with them. When a task is cloned into a new user namespace, the uids in the namespace can be mapped (1-1, in blocks) to uids on the … Continue reading

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