This patchset try to add userns support for libvirt lxc.
Since userns is nearly completed in linux-3.9, the old
kernel doesn't support userns, I add some New XML elements
to let people decide if enable userns.The userns is enabled
only when user configure the XML.
The format of user namespace related XML file like below:
<idmap>
<uid start='0' target='1000' count='10'>
<gid start='0' target='1000' count='10'>
</idmap>
it means the user in container (which uid:gid is 0:0) will
be mapped to the user in host (uid:gid is 1000:1000), count
is used to form an u/gid range: The users in container which
uid in [start, start + count -1] will be mapped.
You can have multiple lines to map differnet id ranges,
caution, you must make sure the root user of container has
been mapped.
This patchset also does the below jobs.
1, Because the uninit userns has no right to create devices,
we should create devices for container on host.
2, Changes the owner of fuse and tty device.
Change from v3:
1, fix some bugs that Daniel pointed out
2, reorder the patchset,introduce virLXCControllerChown first.
3, rebase
Change from v2:
1, Mount tmpfs on /stateDir/domain.dev
2, Create devices under /stateDir/doamin.dev/
3, Mount Move the /.oldroot/stateDir/doamin.dev/ on the /dev/ of container
4, Enhance the configuration, disallow the semi configuration
Gao feng (10):
LXC: Introduce New XML element for user namespace
LXC: enable user namespace only when user set the uidmap
LXC: sort the uidmap/gidmap of domain
LXC: introduce virLXCControllerSetupUserns and lxcContainerSetID
LXC: Creating devices for container on host side
LXC: controller: change the owner of tty devices to the root user of
container
LXC: controller: change the owner of /dev to the root user of
container
LXC: controller: change the owner of devices created on host
LXC: controller: change the owner of /dev/pts and ptmx to the root of
container
LXC: fuse: Change files owner to the root user of container
docs/formatdomain.html.in | 23 +++++
docs/schemas/domaincommon.rng | 31 ++++++
src/conf/domain_conf.c | 115 +++++++++++++++++++++
src/conf/domain_conf.h | 22 ++++
src/lxc/lxc_container.c | 173 +++++++++++++++++--------------
src/lxc/lxc_controller.c | 235 ++++++++++++++++++++++++++++++++++++++++--
src/lxc/lxc_fuse.c | 4 +
7 files changed, 516 insertions(+), 87 deletions(-)
--
1.8.1.4
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