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kbase: debuglogs: Add a 'TL;DR' section for enabling logging in most common case

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The document grew a bit too much explaining all the mistakes we've seen
the users do when configuring logging. Add a section distilling the
configuration of the most basic scenario which we can refer to when
upstream issues are reported. The scenario is for a runtime setting of
logging into a file applied to the 'virtqemud' daemon.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Peter Krempa 2023-04-17 13:31:25 +02:00
parent 883b427acf
commit d405caae87
1 changed files with 16 additions and 0 deletions
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docs/kbase/debuglogs.rst
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@ -16,6 +16,22 @@ server side that matters as nearly all interesting work takes place there.
Moreover, libvirt catches stderr of all running domains. These can be useful as
well.
TL;DR - Enable debug logs for most common scenario
===================================================
This applies to the most common scenario of ``system`` instance of
``virtqemud``. Log setting is not persisted, so a restart of ``virtqemud`` or
the system clears this setting::
# virt-admin -c virtqemud:///system daemon-log-outputs "3:journald 1:file:/var/log/libvirt/libvirtd.log"
# virt-admin -c virtqemud:///system daemon-log-filters "3:remote 4:event 3:util.json 3:util.object 3:util.dbus 3:util.netlink 3:node_device 3:rpc 3:access 1:*"
# # optionally disable timeout of the daemon
# virt-admin -c virtqemud:///system daemon-timeout 0
For any other configuration please read the rest of the document. If you want
to persist the log level and log outputs settings edit
``/etc/libvirt/virtqemud.conf`` and look for ``log-filters`` and ``log-outputs``
Logging settings in libvirt
===========================