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When booting a virtual machine with a kernel/initrd it is possible to pass command line arguments using the <cmdline>...args...</cmdline> element in the guest XML. These appear to the kernel / init process in /proc/cmdline. When booting a container we do not have a custom /proc/cmdline, but we can easily set an environment variable for it. Ideally we could pass individual arguments to the init process as a regular set of 'char *argv[]' parameters, but that would involve libvirt parsing the <cmdline> XML text. This can easily be added later, even if we add the env variable now * docs/drvlxc.html.in: Document env variables passed to LXC * src/conf/domain_conf.c: Add <cmdline> to be parsed for guests of type='exe' * src/lxc/lxc_container.c: Set LIBVIRT_LXC_CMDLINE env var
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>