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| author |   Daniel P. Berrange <berrange@redhat.com> | 2011-10-03 18:37:47 +0100 |
|---|---|---|
| committer | Daniel P. Berrange <berrange@redhat.com> | 2011-10-04 14:15:09 +0100 |
| commit | 652f88714454767a9c93bbb71740b897df8a795e (patch) | |
| tree | d3d5a41385f69911be361341bc9abf6e47a3874a /docs/drvlxc.html.in | |
| parent | Add support for bandwidth filtering on LXC guests (diff) | |
| download | libvirt-652f88714454767a9c93bbb71740b897df8a795e.tar.gz libvirt-652f88714454767a9c93bbb71740b897df8a795e.tar.bz2 libvirt-652f88714454767a9c93bbb71740b897df8a795e.zip | |
Allow passing of command line args to LXC container
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
Diffstat (limited to 'docs/drvlxc.html.in')
| -rw-r--r-- | docs/drvlxc.html.in | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/docs/drvlxc.html.in b/docs/drvlxc.html.in index 5ce218d92..47837d1a8 100644 --- a/docs/drvlxc.html.in +++ b/docs/drvlxc.html.in @@ -39,6 +39,23 @@ driver. On such kernels, it may be neccessary to unmount the blkio controller. </p> +<h2>Environment setup for the container init</h2> + +<p> +When the container "init" process is started, it will be given several useful +environment variables. +</p> + +<dl> +<dt>LIBVIRT_LXC_NAME</dt> +<dd>The name assigned to the container by libvirt</dd> +<dt>LIBVIRT_LXC_UUID</dt> +<dd>The UUID assigned to the container by libvirt</dd> +<dt>LIBVIRT_LXC_CMDLINE</dt> +<dd>The unparsed command line arguments specified in the container configuration</dd> +</dl> + + <h3>Example config version 1</h3> <p></p> <pre> |