Non-root lxc for juju

Registered by Patricia Gaughen

Discuss non-root lxc for juju

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Direction:
Needs approval
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Definition:
New
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1. Currently in 14.04 root can create a container in a user namespace so that the container does not have any root privilege over the host.
2. Work is still to be done to finish enabling non-root users to create and start containers:
    a. The uidmap package allows use of subuid ranges by unprivileged users
    b. lxc ships a 'lxc-user-nic' program which allows unprivileged users to request a limited number of nics to be assigned to specified bridges and passed into a netns.
    c. lxc currently will avoid trying to create new cgroups for containers started by unprivileged users.

Creation of a container by an unprivileged user currently needs to be done using a modified ubuntu-cloud template, since debootstrap won't run if it cannot create devices.

We might want to consider allowing unprivileged users to create certain innocuous devices (this is a kernel patch) like /dev/null and /dev/zero. In lieu of that we currently bind-mount those devices into the container.

(?)

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