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Describe some of the issues to be aware of when configuring LXC
guests with security isolation as a goal.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Mention that user namespace can be enabled using the UID/GID
mapping schema.
Fix typo in link anchor for container args in domain XML docs.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Add to the docs/drvlxc.html.in documentation to describe how to
configure systemd to auto-activate a container when a client
connects to a socket
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Update the LXC driver documentation to describe the way
containers are setup by default. Also describe the common
virsh commands for managing containers and a little about
the security. Placeholders for docs about configuring
containers still to be filled in.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The rule generating the HTML docs passing the --html flag
to xsltproc. This makes it use the legacy HTML parser, which
either ignores or tries to fix all sorts of broken XML tags.
There's no reason why we should be writing broken XML in
the first place, so removing --html and adding the XHTML
doctype to all files forces us to create good XML.
This adds the XHTML doc type and fixes many, many XML tag
problems it exposes.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
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
The "libvirt supports:" section on the main page of libvirt.org
contains a list of hypervisors with links that point to the sites of
the underlying virt technologies. The entry for KVM points to
http://www.linux-kvm.org/, for example. People coming to libvirt.org
for the first time are likely to know about those sites, and they're
probably interested in how libvirt manages those technologies. This
patch points those links to the libvirt driver pages instead. It also
consolidates KVM and QEMU as there is only one libvirt driver page for
them. Finally, it adds a line about networking support.
v2: incorporate Eric's feedback adding project links to driver pages.
website: Add project links to KVM/QEMU driver page
website: Add project links to Xen driver page
website: Add project links to LXC driver page
website: Add project links to OpenVZ driver page
website: Add project links to UML driver page
website: Add project links to Virtualbox driver page
website: Add project links to ESX driver page
website: Add project links to VMware driver page
The current LXC I/O controller looks for HUP to detect
when a guest has quit. This isn't reliable as during
initial bootup it is possible that 'init' will close
the console and let mingetty re-open it. The shutdown
of containers was also flakey because it only killed
the libvirt I/O controller and expected container
processes to gracefully follow.
Change the I/O controller such that when it see HUP
or an I/O error, it uses kill($PID, 0) to see if the
process has really quit.
Change the container shutdown sequence to use the
virCgroupKillPainfully function to ensure every
really goes away
This change makes the use of the 'cpu', 'devices'
and 'memory' cgroups controllers compulsory with
LXC
* docs/drvlxc.html.in: Document that certain cgroups
controllers are now mandatory
* src/lxc/lxc_controller.c: Check if PID is still
alive before quitting on I/O error/HUP
* src/lxc/lxc_driver.c: Use virCgroupKillPainfully
This patch is the result of running the following command in the docs
directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in
* docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
