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dev-manual: note on using journald without syslog

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journald is not a syslog provider, so using journald exclusively amounts
to just preventing a syslog provider from being specified on a system
where journald is active.

Various spots where this has popped up:
* https://stackoverflow.com/q/48746397
* https://lists.yoctoproject.org/g/yocto/topic/82883035#53548

(From yocto-docs rev: aba38d5dc2db708ed6e8fc6dca4d869fe7fe855c)

Signed-off-by: Nicholas Sielicki <nicholas.sielicki@legrand.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Nicholas Sielicki
2022-03-16 11:28:57 -05:00
committed by Richard Purdie
parent 154e69f118
commit 2fd4d2cb70
1 changed files with 14 additions and 0 deletions
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documentation/dev-manual/common-tasks.rst
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@@ -7910,6 +7910,20 @@ image cannot use this package group. However, it can install SysVinit
and the appropriate packages will have support for both systemd and and the appropriate packages will have support for both systemd and
SysVinit. SysVinit.
Using systemd-journald without a traditional syslog daemon
----------------------------------------------------------
Counter-intuitively, ``systemd-journald`` is not a syslog runtime or provider,
and the proper way to use systemd-journald as your sole logging mechanism is to
effectively disable syslog entirely by setting these variables in your distribution
configuration file::
VIRTUAL-RUNTIME_syslog = ""
VIRTUAL-RUNTIME_base-utils-syslog = ""
Doing so will prevent ``rsyslog`` / ``busybox-syslog`` from being pulled in by
default, leaving only ``journald``.
Selecting a Device Manager Selecting a Device Manager
========================== ==========================