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Diffstat (limited to 'man/journald.conf.xml')
| -rw-r--r-- | man/journald.conf.xml | 70 |
1 files changed, 44 insertions, 26 deletions
diff --git a/man/journald.conf.xml b/man/journald.conf.xml index 85146b0d82..abfe3130dd 100644 --- a/man/journald.conf.xml +++ b/man/journald.conf.xml @@ -97,7 +97,7 @@ needed, so that its existence controls where log data goes. <literal>none</literal> turns off all storage, all log data received will be dropped. Forwarding to other targets, such as - the console, the kernel log buffer or a syslog daemon will + the console, the kernel log buffer, or a syslog socket will still work however. Defaults to <literal>auto</literal>.</para></listitem> </varlistentry> @@ -220,27 +220,19 @@ journald will stop using more space, but it will not be removing existing files to go reduce footprint either.</para> - <para><varname>SystemMaxFileSize=</varname> - and - <varname>RuntimeMaxFileSize=</varname> - control how large individual journal - files may grow at maximum. This - influences the granularity in which - disk space is made available through - rotation, i.e. deletion of historic - data. Defaults to one eighth of the - values configured with + <para><varname>SystemMaxFileSize=</varname> and + <varname>RuntimeMaxFileSize=</varname> control how large + individual journal files may grow at maximum. This influences + the granularity in which disk space is made available through + rotation, i.e. deletion of historic data. Defaults to one + eighth of the values configured with <varname>SystemMaxUse=</varname> and - <varname>RuntimeMaxUse=</varname>, so - that usually seven rotated journal - files are kept as history. Specify - values in bytes or use K, M, G, T, P, - E as units for the specified sizes - (equal to 1024, 1024²,... bytes). - Note that size limits are enforced - synchronously when journal files are - extended, and no explicit rotation - step triggered by time is + <varname>RuntimeMaxUse=</varname>, so that usually seven + rotated journal files are kept as history. Specify values in + bytes or use K, M, G, T, P, E as units for the specified sizes + (equal to 1024, 1024²,... bytes). Note that size limits are + enforced synchronously when journal files are extended, and no + explicit rotation step triggered by time is needed.</para></listitem> </varlistentry> @@ -308,13 +300,13 @@ daemon, to the kernel log buffer (kmsg), to the system console, or sent as wall messages to all logged-in users. These options take boolean arguments. If forwarding to syslog - is enabled but no syslog daemon is running, the respective - option has no effect. By default, only forwarding wall is - enabled. These settings may be overridden at boot time with - the kernel command line options + is enabled but nothing reads messages from the socket, + forwarding to syslog has no effect. By default, only + forwarding to wall is enabled. These settings may be + overridden at boot time with the kernel command line options <literal>systemd.journald.forward_to_syslog=</literal>, <literal>systemd.journald.forward_to_kmsg=</literal>, - <literal>systemd.journald.forward_to_console=</literal> and + <literal>systemd.journald.forward_to_console=</literal>, and <literal>systemd.journald.forward_to_wall=</literal>. When forwarding to the console, the TTY to log to can be changed with <varname>TTYPath=</varname>, described @@ -366,6 +358,32 @@ </refsect1> <refsect1> + <title>Forwarding to traditional syslog daemons</title> + + <para> + Journal events can be transfered to a different logging daemon + in two different ways. In the first method, messages are + immediately forwarded to a socket + (<filename>/run/systemd/journal/syslog</filename>), where the + traditional syslog daemon can read them. This method is + controlled by <varname>ForwardToSyslog=</varname> option. In a + second method, a syslog daemon behaves like a normal journal + client, and reads messages from the journal files, similarly to + <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>. + In this method, messages do not have to be read immediately, + which allows a logging daemon which is only started late in boot + to access all messages since the start of the system. In + addition, full structured meta-data is available to it. This + method of course is available only if the messages are stored in + a journal file at all. So it will work if + <varname>Storage=none</varname> is set. It should be noted that + usualy the <emphasis>second</emphasis> method is used by syslog + daemons, so the <varname>Storage=</varname> option, and not the + <varname>ForwardToSyslog=</varname> option, is relevant for them. + </para> + </refsect1> + + <refsect1> <title>See Also</title> <para> <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |