On Linux, changing the nodeset on 'numatune' does not imply that
the guest memory will be migrated on the spot to the new nodeset.
The memory migration is tied on guest usage of the memory pages,
and an idle guest will take longer to have its memory migrated
to the new nodeset.
This is a behavior explained in detail in the Linux kernel
documentation in Documentation/admin-guide/cgroup-v1/cpusets.rst.
The user doesn't need this level of detail though - just needs
his/her expectations under check. Running 'numastat' and hoping
for instant memory migration from the previous nodeset to the new
one is not viable.
There's also parts of the memory that are locked by QEMU in the
same place, e.g. when VFIO devices are present. Let's also
mention it as another factor that impacts the results the
user might expect from NUMA memory migration with numatune.
https://bugzilla.redhat.com/show_bug.cgi?id=1640869
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Update the manpage for the 'server-update-tls' command
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Zhang Bo <oscar.zhangbo@huawei.com>
Signed-off-by: Wu Qingliang <wuqingliang4@huawei.com>
Simplify gathering the actual return value from a passed-through QMP
command when using 'qemu-monitor-command' by adding '--return-value'
switch which just extracts the 'return' section and alternatively
reports an error if the section is not present.
This simplifies gathering of some test data where the full reply would
need to be trimmed just for the actual return value.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Mention that we actually by default use QMP and clarify the rest
of the documentation.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
We currently note that the QEMU embedded driver is experimental
in the drvqemu.html file, but we should do the same in the
virt-qemu-run man page.
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
You can't have two links with the same text when using named
link references (a single "_"). If you need multiple links
with the same text you must use anonymous link references
(a double "_").
There are also some duplicate section headers causing the
same problem with duplicate link targets.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Simplify human usage of secret-set-value by adding --interactive which
will read the value of the secret from the terminal.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Allow using the contents of --file without base64 decoding.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Print a warning if users pass in secrets as command line arguments and
mention it in the man page.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The necessity to specify the secret value as command argument is
insecure. Allow reading the secret from a file.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Users might want to get the raw value instead of dealing with base64
encoding. This might be useful for redirection to file and also for
simple human-readable secrets.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Fix a documentation generation error:
System Message: WARNING/2 (<stdin>, line 15); backlink
Inline literal start-string without end-string.
As well as the 'independant' typo.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Fixes: d600667278
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
The previous "QEMU shim" proof of concept was taking an approach of only
caring about initial spawning of the QEMU process. It was then
registered with the libvirtd daemon who took over management of it. The
intent was that later libvirtd would be refactored so that the shim
retained control over the QEMU monitor and libvirt just forwarded APIs
to each shim as needed. This forwarding of APIs would require quite alot
of significant refactoring of libvirtd to achieve.
This impl thus takes a quite different approach, explicitly deciding to
keep the VMs completely separate from those seen & managed by libvirtd.
Instead it uses the new "qemu:///embed" URI scheme to embed the entire
QEMU driver in the shim, running with a custom root directory.
Once the driver is initialization, the shim starts a VM and then waits
to shutdown automatically when QEMU shuts down, or should kill QEMU if
it is terminated itself. This ought to use the AUTO_DESTROY feature but
that is not yet available in embedded mode, so we rely on installing a
few signal handlers to gracefully kill QEMU. This isn't reliable if
we crash of course, but you can restart with the same root dir.
Note this program does not expose any way to manage the QEMU process,
since there's no RPC interface enabled. It merely starts the VM and
cleans up when the guest shuts down at the end. This program is
installed to /usr/bin/virt-qemu-run enabling direct use by end users.
Most use cases will probably want to integrate the concept directly
into their respective application codebases. This standalone binary
serves as a nice demo though, and also provides a way to measure
performance of the startup process quite simply.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reported at build time by lintian:
manpage-section-mismatch usr/share/man/man8/virt-sanlock-cleanup.8.gz:3 8 != 1
And indeed the rst file says 1 while the makefile say 8:
if WITH_SANLOCK
manpages8_rst += manpages/virt-sanlock-cleanup.rst
else ! WITH_SANLOCK
8 "System administration commands and daemons" seems to match, so fix
the rst file to match.
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Our virsh already has 'domhostname' command. Add '--source'
argument to it so that users can chose between 'lease' and
'agent' sources. Also, implement completer for the argument.
Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Add documentation for additional reason why snapshot-revert might need
to be forced. This explains why restoring an inactive snapshot while
there is managed saved state is refused by default.
Signed-off-by: Michael Weiser <michael.weiser@gmx.de>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reformat explanations of the snapshot-revert force reasons in
preparation for more to be added. This is a simple reformat without any
wording changes.
Signed-off-by: Michael Weiser <michael.weiser@gmx.de>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Trivially replace usages of qemu and lxc in the virsh manpage with their
more heavily used and (according to Wikipedia) correct upper-case
spellings QEMU and LXC.
Signed-off-by: Michael Weiser <michael.weiser@gmx.de>
Suggested-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Document that --diskspec DISK,snapshot=no disables snapshot for the
given disk.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Some versions of the rst2man convertor are buggy failing to
cope with syntax highlighting in code blocks.
This isn't something we really need for the man page code
blocks, so we can just delete the highlighting directive.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The keycodemap tool is told to generate docs in rst format now
instead of pod.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This was a semi-automated conversion. First it was run through pod2rst,
and then it was manually editted to use a rst structure that matches
expectations of rst2man.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This was a semi-automated conversion. First it was run through pod2rst,
and then it was manually editted to use a rst structure that matches
expectations of rst2man.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This was a semi-automated conversion. First it was run through pod2rst,
and then it was manually editted to use a rst structure that matches
expectations of rst2man.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This was a semi-automated conversion. First it was run through pod2rst,
and then it was manually editted to use a rst structure that matches
expectations of rst2man.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This was a semi-automated conversion. First it was run through pod2rst,
and then it was manually editted to use a rst structure that matches
expectations of rst2man.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This was a semi-automated conversion. First it was run through pod2rst,
and then it was manually editted to use a rst structure that matches
expectations of rst2man.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This was a semi-automated conversion. First it was run through pod2rst,
and then it was manually editted to use a rst structure that matches
expectations of rst2man.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This was a semi-automated conversion. First it was run through pod2rst,
and then it was manually editted to use a rst structure that matches
expectations of rst2man.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This was a semi-automated conversion. First it was run through pod2rst,
and then it was manually editted to use a rst structure that matches
expectations of rst2man.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This was a semi-automated conversion. First it was run through pod2rst,
and then it was manually editted to use a rst structure that matches
expectations of rst2man.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The rst2man tool is provided by python docutils, and as the name
suggests, it converts RST documents into man pages.
The intention is that our current POD docs will be converted to
RST format, allowing one more use of Perl to be eliminated from
libvirt.
The manual pages will now all be kept in the docs/manpages/ directory,
which enables us to include the man pages in the published website.
This is good for people searching for libvirt man pages online as it
makes it more likely google will send them to the libvirt.org instead
of some random third party man page site with outdated content.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
