diff options
Diffstat (limited to 'src/grp-journal/systemd-journald')
11 files changed, 1108 insertions, 0 deletions
diff --git a/src/grp-journal/systemd-journald/Makefile b/src/grp-journal/systemd-journald/Makefile new file mode 100644 index 0000000000..4f05218d88 --- /dev/null +++ b/src/grp-journal/systemd-journald/Makefile @@ -0,0 +1,85 @@ +# -*- Mode: makefile; indent-tabs-mode: t -*- +# +# This file is part of systemd. +# +# Copyright 2010-2012 Lennart Poettering +# Copyright 2010-2012 Kay Sievers +# Copyright 2013 Zbigniew Jędrzejewski-Szmek +# Copyright 2013 David Strauss +# Copyright 2016 Luke Shumaker +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. +# +# systemd is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public License +# along with systemd; If not, see <http://www.gnu.org/licenses/>. +include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk +include $(topsrcdir)/build-aux/Makefile.head.mk + +systemd_journald_SOURCES = \ + src/journal/journald.c \ + src/journal/journald-server.h + +systemd_journald_LDADD = \ + libjournal-core.la \ + libsystemd-shared.la + +rootlibexec_PROGRAMS += \ + systemd-journald + +dist_systemunit_DATA += \ + units/systemd-journald.socket \ + units/systemd-journald-dev-log.socket \ + units/systemd-journald-audit.socket + +nodist_systemunit_DATA += \ + units/systemd-journald.service + +dist_pkgsysconf_DATA += \ + src/journal/journald.conf + +nodist_catalog_DATA = \ + catalog/systemd.bg.catalog \ + catalog/systemd.be.catalog \ + catalog/systemd.be@latin.catalog \ + catalog/systemd.fr.catalog \ + catalog/systemd.it.catalog \ + catalog/systemd.pl.catalog \ + catalog/systemd.pt_BR.catalog \ + catalog/systemd.ru.catalog \ + catalog/systemd.zh_CN.catalog \ + catalog/systemd.zh_TW.catalog \ + catalog/systemd.catalog + +EXTRA_DIST += \ + $(nodist_catalog_DATA:.catalog=.catalog.in) + +# Note that we don't use @@ for replacement markers here, but %%. This is +# because the catalog uses @@ already for its runtime replacement handling and +# we don't want to conflict with that. +$(outdir)/%.catalog: catalog/%.catalog.in + $(AM_V_GEN)$(MKDIR_P) $(dir $@) && \ + $(SED) -e 's~%SUPPORT_URL%~$(SUPPORT_URL)~' < $< > $@ + +SOCKETS_TARGET_WANTS += \ + systemd-journald.socket \ + systemd-journald-dev-log.socket \ + systemd-journald-audit.socket + +SYSINIT_TARGET_WANTS += \ + systemd-journald.service + +EXTRA_DIST += \ + units/systemd-journald.service.in + +gperf_gperf_sources += \ + src/journal/journald-gperf.gperf + +include $(topsrcdir)/build-aux/Makefile.tail.mk diff --git a/src/grp-journal/systemd-journald/journald.c b/src/grp-journal/systemd-journald/journald.c new file mode 100644 index 0000000000..cd887feed8 --- /dev/null +++ b/src/grp-journal/systemd-journald/journald.c @@ -0,0 +1,120 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <unistd.h> + +#include <systemd/sd-daemon.h> +#include <systemd/sd-messages.h> + +#include "basic/formats-util.h" +#include "basic/sigbus.h" +#include "journald-kmsg.h" +#include "journald-server.h" +#include "journald-syslog.h" +#include "sd-journal/journal-authenticate.h" + +int main(int argc, char *argv[]) { + Server server; + int r; + + if (argc > 1) { + log_error("This program does not take arguments."); + return EXIT_FAILURE; + } + + log_set_target(LOG_TARGET_SAFE); + log_set_facility(LOG_SYSLOG); + log_parse_environment(); + log_open(); + + umask(0022); + + sigbus_install(); + + r = server_init(&server); + if (r < 0) + goto finish; + + server_vacuum(&server, false, false); + server_flush_to_var(&server); + server_flush_dev_kmsg(&server); + + log_debug("systemd-journald running as pid "PID_FMT, getpid()); + server_driver_message(&server, SD_MESSAGE_JOURNAL_START, + LOG_MESSAGE("Journal started"), + NULL); + + for (;;) { + usec_t t = USEC_INFINITY, n; + + r = sd_event_get_state(server.event); + if (r < 0) + goto finish; + if (r == SD_EVENT_FINISHED) + break; + + n = now(CLOCK_REALTIME); + + if (server.max_retention_usec > 0 && server.oldest_file_usec > 0) { + + /* The retention time is reached, so let's vacuum! */ + if (server.oldest_file_usec + server.max_retention_usec < n) { + log_info("Retention time reached."); + server_rotate(&server); + server_vacuum(&server, false, false); + continue; + } + + /* Calculate when to rotate the next time */ + t = server.oldest_file_usec + server.max_retention_usec - n; + } + +#ifdef HAVE_GCRYPT + if (server.system_journal) { + usec_t u; + + if (journal_file_next_evolve_usec(server.system_journal, &u)) { + if (n >= u) + t = 0; + else + t = MIN(t, u - n); + } + } +#endif + + r = sd_event_run(server.event, t); + if (r < 0) { + log_error_errno(r, "Failed to run event loop: %m"); + goto finish; + } + + server_maybe_append_tags(&server); + server_maybe_warn_forward_syslog_missed(&server); + } + + log_debug("systemd-journald stopped as pid "PID_FMT, getpid()); + server_driver_message(&server, SD_MESSAGE_JOURNAL_STOP, + LOG_MESSAGE("Journal stopped"), + NULL); + +finish: + server_done(&server); + + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} diff --git a/src/grp-journal/systemd-journald/journald.conf b/src/grp-journal/systemd-journald/journald.conf new file mode 100644 index 0000000000..2541b949be --- /dev/null +++ b/src/grp-journal/systemd-journald/journald.conf @@ -0,0 +1,41 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. +# +# Entries in this file show the compile time defaults. +# You can change settings by editing this file. +# Defaults can be restored by simply deleting this file. +# +# See journald.conf(5) for details. + +[Journal] +#Storage=auto +#Compress=yes +#Seal=yes +#SplitMode=uid +#SyncIntervalSec=5m +#RateLimitIntervalSec=30s +#RateLimitBurst=1000 +#SystemMaxUse= +#SystemKeepFree= +#SystemMaxFileSize= +#SystemMaxFiles=100 +#RuntimeMaxUse= +#RuntimeKeepFree= +#RuntimeMaxFileSize= +#RuntimeMaxFiles=100 +#MaxRetentionSec= +#MaxFileSec=1month +#ForwardToSyslog=no +#ForwardToKMsg=no +#ForwardToConsole=no +#ForwardToWall=yes +#TTYPath=/dev/console +#MaxLevelStore=debug +#MaxLevelSyslog=debug +#MaxLevelKMsg=notice +#MaxLevelConsole=info +#MaxLevelWall=emerg diff --git a/src/grp-journal/systemd-journald/journald.conf.xml b/src/grp-journal/systemd-journald/journald.conf.xml new file mode 100644 index 0000000000..fef4fde898 --- /dev/null +++ b/src/grp-journal/systemd-journald/journald.conf.xml @@ -0,0 +1,411 @@ +<?xml version='1.0'?> <!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> + +<!-- + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +--> + +<refentry id="journald.conf" + xmlns:xi="http://www.w3.org/2001/XInclude"> + <refentryinfo> + <title>journald.conf</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Lennart</firstname> + <surname>Poettering</surname> + <email>lennart@poettering.net</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>journald.conf</refentrytitle> + <manvolnum>5</manvolnum> + </refmeta> + + <refnamediv> + <refname>journald.conf</refname> + <refname>journald.conf.d</refname> + <refpurpose>Journal service configuration files</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename>/etc/systemd/journald.conf</filename></para> + <para><filename>/etc/systemd/journald.conf.d/*.conf</filename></para> + <para><filename>/run/systemd/journald.conf.d/*.conf</filename></para> + <para><filename>/usr/lib/systemd/journald.conf.d/*.conf</filename></para> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para>These files configure various parameters of the systemd + journal service, + <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> + + </refsect1> + + <xi:include href="standard-conf.xml" xpointer="main-conf" /> + + <refsect1> + <title>Options</title> + + <para>All options are configured in the + <literal>[Journal]</literal> section:</para> + + <variablelist> + + <varlistentry> + <term><varname>Storage=</varname></term> + + <listitem><para>Controls where to store journal data. One of + <literal>volatile</literal>, + <literal>persistent</literal>, + <literal>auto</literal> and + <literal>none</literal>. If + <literal>volatile</literal>, journal + log data will be stored only in memory, i.e. below the + <filename>/run/log/journal</filename> hierarchy (which is + created if needed). If <literal>persistent</literal>, data + will be stored preferably on disk, i.e. below the + <filename>/var/log/journal</filename> hierarchy (which is + created if needed), with a fallback to + <filename>/run/log/journal</filename> (which is created if + needed), during early boot and if the disk is not writable. + <literal>auto</literal> is similar to + <literal>persistent</literal> but the directory + <filename>/var/log/journal</filename> is not created if + 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 socket will + still work however. Defaults to + <literal>auto</literal>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>Compress=</varname></term> + + <listitem><para>Takes a boolean value. If enabled (the + default), data objects that shall be stored in the journal and + are larger than a certain threshold are compressed before they + are written to the file system.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>Seal=</varname></term> + + <listitem><para>Takes a boolean value. If enabled (the + default), and a sealing key is available (as created by + <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s + <option>--setup-keys</option> command), Forward Secure Sealing + (FSS) for all persistent journal files is enabled. FSS is + based on <ulink + url="https://eprint.iacr.org/2013/397">Seekable Sequential Key + Generators</ulink> by G. A. Marson and B. Poettering + (doi:10.1007/978-3-642-40203-6_7) and may be used to protect + journal files from unnoticed alteration.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>SplitMode=</varname></term> + + <listitem><para>Controls whether to split up journal files per user. Split-up journal files are primarily + useful for access control: on UNIX/Linux access control is managed per file, and the journal daemon will assign + users read access to their journal files. This setting takes one of <literal>uid</literal>, + <literal>login</literal> or <literal>none</literal>. If <literal>uid</literal>, all regular users will get each + their own journal files regardless of whether their processes possess login sessions or not, however system + users will log into the system journal. If <literal>login</literal>, actually logged-in users will get each + their own journal files, but users without login session and system users will log into the system + journal. Note that in this mode, user code running outside of any login session will log into the system log + instead of the split-out user logs. Most importantly, this means that information about core dumps of user + processes collected via the + <citerefentry><refentrytitle>systemd-coredump</refentrytitle><manvolnum>8</manvolnum></citerefentry> subsystem + will end up in the system logs instead of the user logs, and thus not be accessible to the owning users. If + <literal>none</literal>, journal files are not split up by user and all messages are instead stored in the + single system journal. In this mode unprivileged users generally do not have access to their own log data. Note + that splitting up journal files by user is only available for journals stored persistently. If journals are + stored on volatile storage (see above), only a single journal file for all user IDs is kept. Defaults to + <literal>uid</literal>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>RateLimitIntervalSec=</varname></term> + <term><varname>RateLimitBurst=</varname></term> + + <listitem><para>Configures the rate limiting that is applied + to all messages generated on the system. If, in the time + interval defined by <varname>RateLimitIntervalSec=</varname>, + more messages than specified in + <varname>RateLimitBurst=</varname> are logged by a service, + all further messages within the interval are dropped until the + interval is over. A message about the number of dropped + messages is generated. This rate limiting is applied + per-service, so that two services which log do not interfere + with each other's limits. Defaults to 1000 messages in 30s. + The time specification for + <varname>RateLimitIntervalSec=</varname> may be specified in the + following units: <literal>s</literal>, <literal>min</literal>, + <literal>h</literal>, <literal>ms</literal>, + <literal>us</literal>. To turn off any kind of rate limiting, + set either value to 0.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>SystemMaxUse=</varname></term> + <term><varname>SystemKeepFree=</varname></term> + <term><varname>SystemMaxFileSize=</varname></term> + <term><varname>SystemMaxFiles=</varname></term> + <term><varname>RuntimeMaxUse=</varname></term> + <term><varname>RuntimeKeepFree=</varname></term> + <term><varname>RuntimeMaxFileSize=</varname></term> + <term><varname>RuntimeMaxFiles=</varname></term> + + <listitem><para>Enforce size limits on the journal files + stored. The options prefixed with <literal>System</literal> + apply to the journal files when stored on a persistent file + system, more specifically + <filename>/var/log/journal</filename>. The options prefixed + with <literal>Runtime</literal> apply to the journal files + when stored on a volatile in-memory file system, more + specifically <filename>/run/log/journal</filename>. The former + is used only when <filename>/var</filename> is mounted, + writable, and the directory + <filename>/var/log/journal</filename> exists. Otherwise, only + the latter applies. Note that this means that during early + boot and if the administrator disabled persistent logging, + only the latter options apply, while the former apply if + persistent logging is enabled and the system is fully booted + up. <command>journalctl</command> and + <command>systemd-journald</command> ignore all files with + names not ending with <literal>.journal</literal> or + <literal>.journal~</literal>, so only such files, located in + the appropriate directories, are taken into account when + calculating current disk usage.</para> + + <para><varname>SystemMaxUse=</varname> and + <varname>RuntimeMaxUse=</varname> control how much disk space + the journal may use up at most. + <varname>SystemKeepFree=</varname> and + <varname>RuntimeKeepFree=</varname> control how much disk + space systemd-journald shall leave free for other uses. + <command>systemd-journald</command> will respect both limits + and use the smaller of the two values.</para> + + <para>The first pair defaults to 10% and the second to 15% of + the size of the respective file system, but each value is + capped to 4G. If the file system is nearly full and either + <varname>SystemKeepFree=</varname> or + <varname>RuntimeKeepFree=</varname> are violated when + systemd-journald is started, the limit will be raised to the + percentage that is actually free. This means that if there was + enough free space before and journal files were created, and + subsequently something else causes the file system to fill up, + journald will stop using more space, but it will not be + removing existing files to reduce the footprint again, + either.</para> + + <para><varname>SystemMaxFileSize=</varname> and + <varname>RuntimeMaxFileSize=</varname> control how large + individual journal files may grow at most. 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.</para> + + <para>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> + + <para><varname>SystemMaxFiles=</varname> and + <varname>RuntimeMaxFiles=</varname> control how many + individual journal files to keep at most. Note that only + archived files are deleted to reduce the number of files until + this limit is reached; active files will stay around. This + means that, in effect, there might still be more journal files + around in total than this limit after a vacuuming operation is + complete. This setting defaults to 100.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>MaxFileSec=</varname></term> + + <listitem><para>The maximum time to store entries in a single + journal file before rotating to the next one. Normally, + time-based rotation should not be required as size-based + rotation with options such as + <varname>SystemMaxFileSize=</varname> should be sufficient to + ensure that journal files do not grow without bounds. However, + to ensure that not too much data is lost at once when old + journal files are deleted, it might make sense to change this + value from the default of one month. Set to 0 to turn off this + feature. This setting takes time values which may be suffixed + with the units <literal>year</literal>, + <literal>month</literal>, <literal>week</literal>, + <literal>day</literal>, <literal>h</literal> or + <literal>m</literal> to override the default time unit of + seconds.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>MaxRetentionSec=</varname></term> + + <listitem><para>The maximum time to store journal entries. + This controls whether journal files containing entries older + then the specified time span are deleted. Normally, time-based + deletion of old journal files should not be required as + size-based deletion with options such as + <varname>SystemMaxUse=</varname> should be sufficient to + ensure that journal files do not grow without bounds. However, + to enforce data retention policies, it might make sense to + change this value from the default of 0 (which turns off this + feature). This setting also takes time values which may be + suffixed with the units <literal>year</literal>, + <literal>month</literal>, <literal>week</literal>, + <literal>day</literal>, <literal>h</literal> or <literal> + m</literal> to override the default time unit of + seconds.</para></listitem> + </varlistentry> + + + <varlistentry> + <term><varname>SyncIntervalSec=</varname></term> + + <listitem><para>The timeout before synchronizing journal files + to disk. After syncing, journal files are placed in the + OFFLINE state. Note that syncing is unconditionally done + immediately after a log message of priority CRIT, ALERT or + EMERG has been logged. This setting hence applies only to + messages of the levels ERR, WARNING, NOTICE, INFO, DEBUG. The + default timeout is 5 minutes. </para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>ForwardToSyslog=</varname></term> + <term><varname>ForwardToKMsg=</varname></term> + <term><varname>ForwardToConsole=</varname></term> + <term><varname>ForwardToWall=</varname></term> + + <listitem><para>Control whether log messages received by the + journal daemon shall be forwarded to a traditional syslog + 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 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_wall=</literal>. When + forwarding to the console, the TTY to log to can be changed + with <varname>TTYPath=</varname>, described + below.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>MaxLevelStore=</varname></term> + <term><varname>MaxLevelSyslog=</varname></term> + <term><varname>MaxLevelKMsg=</varname></term> + <term><varname>MaxLevelConsole=</varname></term> + <term><varname>MaxLevelWall=</varname></term> + + <listitem><para>Controls the maximum log level of messages + that are stored on disk, forwarded to syslog, kmsg, the + console or wall (if that is enabled, see above). As argument, + takes one of + <literal>emerg</literal>, + <literal>alert</literal>, + <literal>crit</literal>, + <literal>err</literal>, + <literal>warning</literal>, + <literal>notice</literal>, + <literal>info</literal>, + <literal>debug</literal>, + or integer values in the range of 0–7 (corresponding to the + same levels). Messages equal or below the log level specified + are stored/forwarded, messages above are dropped. Defaults to + <literal>debug</literal> for <varname>MaxLevelStore=</varname> + and <varname>MaxLevelSyslog=</varname>, to ensure that the all + messages are written to disk and forwarded to syslog. Defaults + to + <literal>notice</literal> for <varname>MaxLevelKMsg=</varname>, + <literal>info</literal> for <varname>MaxLevelConsole=</varname>, + and <literal>emerg</literal> for + <varname>MaxLevelWall=</varname>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>TTYPath=</varname></term> + + <listitem><para>Change the console TTY to use if + <varname>ForwardToConsole=yes</varname> is used. Defaults to + <filename>/dev/console</filename>.</para></listitem> + </varlistentry> + + </variablelist> + + </refsect1> + + <refsect1> + <title>Forwarding to traditional syslog daemons</title> + + <para> + Journal events can be transferred to a different logging daemon + in two different ways. With 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 the <varname>ForwardToSyslog=</varname> option. With 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>. + With this, 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 not work if + <varname>Storage=none</varname> is set. It should be noted that + usually 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>, + <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> diff --git a/src/grp-journal/systemd-journald/systemd-journald-audit.socket b/src/grp-journal/systemd-journald/systemd-journald-audit.socket new file mode 100644 index 0000000000..541f2cf38d --- /dev/null +++ b/src/grp-journal/systemd-journald/systemd-journald-audit.socket @@ -0,0 +1,20 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[Unit] +Description=Journal Audit Socket +Documentation=man:systemd-journald.service(8) man:journald.conf(5) +DefaultDependencies=no +Before=sockets.target +ConditionSecurity=audit +ConditionCapability=CAP_AUDIT_READ + +[Socket] +Service=systemd-journald.service +ReceiveBuffer=128M +ListenNetlink=audit 1 +PassCredentials=yes diff --git a/src/grp-journal/systemd-journald/systemd-journald-dev-log.socket b/src/grp-journal/systemd-journald/systemd-journald-dev-log.socket new file mode 100644 index 0000000000..ffd44bb507 --- /dev/null +++ b/src/grp-journal/systemd-journald/systemd-journald-dev-log.socket @@ -0,0 +1,32 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[Unit] +Description=Journal Socket (/dev/log) +Documentation=man:systemd-journald.service(8) man:journald.conf(5) +DefaultDependencies=no +Before=sockets.target + +# Mount and swap units need this. If this socket unit is removed by an +# isolate request the mount and swap units would be removed too, +# hence let's exclude this from isolate requests. +IgnoreOnIsolate=yes + +[Socket] +Service=systemd-journald.service +ListenDatagram=/run/systemd/journal/dev-log +Symlinks=/dev/log +SocketMode=0666 +PassCredentials=yes +PassSecurity=yes + +# Increase both the send and receive buffer, so that things don't +# block early. Note that journald internally uses the this socket both +# for receiving syslog messages, and for forwarding them to any other +# syslog, hence we bump both values. +ReceiveBuffer=8M +SendBuffer=8M diff --git a/src/grp-journal/systemd-journald/systemd-journald.service.in b/src/grp-journal/systemd-journald/systemd-journald.service.in new file mode 100644 index 0000000000..08ace8ae44 --- /dev/null +++ b/src/grp-journal/systemd-journald/systemd-journald.service.in @@ -0,0 +1,34 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[Unit] +Description=Journal Service +Documentation=man:systemd-journald.service(8) man:journald.conf(5) +DefaultDependencies=no +Requires=systemd-journald.socket +After=systemd-journald.socket systemd-journald-dev-log.socket systemd-journald-audit.socket syslog.socket +Before=sysinit.target + +[Service] +Type=notify +Sockets=systemd-journald.socket systemd-journald-dev-log.socket systemd-journald-audit.socket +ExecStart=@rootlibexecdir@/systemd-journald +Restart=always +RestartSec=0 +NotifyAccess=all +StandardOutput=null +CapabilityBoundingSet=CAP_SYS_ADMIN CAP_DAC_OVERRIDE CAP_SYS_PTRACE CAP_SYSLOG CAP_AUDIT_CONTROL CAP_AUDIT_READ CAP_CHOWN CAP_DAC_READ_SEARCH CAP_FOWNER CAP_SETUID CAP_SETGID CAP_MAC_OVERRIDE +WatchdogSec=3min +FileDescriptorStoreMax=1024 +MemoryDenyWriteExecute=yes +SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io + +# Increase the default a bit in order to allow many simultaneous +# services being run since we keep one fd open per service. Also, when +# flushing journal files to disk, we might need a lot of fds when many +# journal files are combined. +LimitNOFILE=16384 diff --git a/src/grp-journal/systemd-journald/systemd-journald.service.xml b/src/grp-journal/systemd-journald/systemd-journald.service.xml new file mode 100644 index 0000000000..2810638bc2 --- /dev/null +++ b/src/grp-journal/systemd-journald/systemd-journald.service.xml @@ -0,0 +1,276 @@ +<?xml version='1.0'?> <!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> + +<!-- + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +--> + +<refentry id="systemd-journald.service"> + + <refentryinfo> + <title>systemd-journald.service</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Lennart</firstname> + <surname>Poettering</surname> + <email>lennart@poettering.net</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>systemd-journald.service</refentrytitle> + <manvolnum>8</manvolnum> + </refmeta> + + <refnamediv> + <refname>systemd-journald.service</refname> + <refname>systemd-journald.socket</refname> + <refname>systemd-journald-dev-log.socket</refname> + <refname>systemd-journald-audit.socket</refname> + <refname>systemd-journald</refname> + <refpurpose>Journal service</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename>systemd-journald.service</filename></para> + <para><filename>systemd-journald.socket</filename></para> + <para><filename>systemd-journald-dev-log.socket</filename></para> + <para><filename>systemd-journald-audit.socket</filename></para> + <para><filename>/usr/lib/systemd/systemd-journald</filename></para> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><filename>systemd-journald</filename> is a system service + that collects and stores logging data. It creates and maintains + structured, indexed journals based on logging information that is + received from a variety of sources:</para> + + <itemizedlist> + <listitem><para>Kernel log messages, via kmsg</para></listitem> + + <listitem><para>Simple system log messages, via the libc + <citerefentry project='man-pages'><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry> + call</para></listitem> + + <listitem><para>Structured system log messages via the native + Journal API, see + <citerefentry><refentrytitle>sd_journal_print</refentrytitle><manvolnum>4</manvolnum></citerefentry></para></listitem> + + <listitem><para>Standard output and standard error of system + services</para></listitem> + + <listitem><para>Audit records, via the audit + subsystem</para></listitem> + </itemizedlist> + + <para>The daemon will implicitly collect numerous metadata fields + for each log messages in a secure and unfakeable way. See + <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry> + for more information about the collected metadata. + </para> + + <para>Log data collected by the journal is primarily text-based + but can also include binary data where necessary. All objects + stored in the journal can be up to 2^64-1 bytes in size.</para> + + <para>By default, the journal stores log data in + <filename>/run/log/journal/</filename>. Since + <filename>/run/</filename> is volatile, log data is lost at + reboot. To make the data persistent, it is sufficient to create + <filename>/var/log/journal/</filename> where + <filename>systemd-journald</filename> will then store the + data:</para> + + <programlisting>mkdir -p /var/log/journal +systemd-tmpfiles --create --prefix /var/log/journal</programlisting> + + <para>See + <citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> + for information about the configuration of this service.</para> + </refsect1> + + <refsect1> + <title>Signals</title> + + <variablelist> + <varlistentry> + <term>SIGUSR1</term> + + <listitem><para>Request that journal data from + <filename>/run/</filename> is flushed to + <filename>/var/</filename> in order to make it persistent (if + this is enabled). This must be used after + <filename>/var/</filename> is mounted, as otherwise log data + from <filename>/run</filename> is never flushed to + <filename>/var</filename> regardless of the configuration. The + <command>journalctl --flush</command> command uses this signal + to request flushing of the journal files, and then waits for + the operation to complete. See + <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry> + for details.</para></listitem> + </varlistentry> + + <varlistentry> + <term>SIGUSR2</term> + + <listitem><para>Request immediate rotation of the journal + files. The <command>journalctl --rotate</command> command uses + this signal to request journal file + rotation.</para></listitem> + </varlistentry> + + <varlistentry> + <term>SIGRTMIN+1</term> + + <listitem><para>Request that all unwritten log data is written + to disk. The <command>journalctl --sync</command> command uses + this signal to trigger journal synchronization, and then waits + for the operation to complete.</para></listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>Kernel Command Line</title> + + <para>A few configuration parameters from + <filename>journald.conf</filename> may be overridden on the kernel + command line:</para> + + <variablelist class='kernel-commandline-options'> + <varlistentry> + <term><varname>systemd.journald.forward_to_syslog=</varname></term> + <term><varname>systemd.journald.forward_to_kmsg=</varname></term> + <term><varname>systemd.journald.forward_to_console=</varname></term> + <term><varname>systemd.journald.forward_to_wall=</varname></term> + + <listitem><para>Enables/disables forwarding of collected log + messages to syslog, the kernel log buffer, the system console + or wall. + </para> + + <para>See + <citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> + for information about these settings.</para> + </listitem> + + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>Access Control</title> + + <para>Journal files are, by default, owned and readable by the + <literal>systemd-journal</literal> system group but are not + writable. Adding a user to this group thus enables her/him to read + the journal files.</para> + + <para>By default, each logged in user will get her/his own set of + journal files in <filename>/var/log/journal/</filename>. These + files will not be owned by the user, however, in order to avoid + that the user can write to them directly. Instead, file system + ACLs are used to ensure the user gets read access only.</para> + + <para>Additional users and groups may be granted access to journal + files via file system access control lists (ACL). Distributions + and administrators may choose to grant read access to all members + of the <literal>wheel</literal> and <literal>adm</literal> system + groups with a command such as the following:</para> + + <programlisting># setfacl -Rnm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/</programlisting> + + <para>Note that this command will update the ACLs both for + existing journal files and for future journal files created in the + <filename>/var/log/journal/</filename> directory.</para> + </refsect1> + + <refsect1> + <title>Files</title> + + <variablelist> + <varlistentry> + <term><filename>/etc/systemd/journald.conf</filename></term> + + <listitem><para>Configure + <command>systemd-journald</command> + behavior. See + <citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>. + </para></listitem> + </varlistentry> + + <varlistentry> + <term><filename>/run/log/journal/<replaceable>machine-id</replaceable>/*.journal</filename></term> + <term><filename>/run/log/journal/<replaceable>machine-id</replaceable>/*.journal~</filename></term> + <term><filename>/var/log/journal/<replaceable>machine-id</replaceable>/*.journal</filename></term> + <term><filename>/var/log/journal/<replaceable>machine-id</replaceable>/*.journal~</filename></term> + + <listitem><para><command>systemd-journald</command> writes + entries to files in + <filename>/run/log/journal/<replaceable>machine-id</replaceable>/</filename> + or + <filename>/var/log/journal/<replaceable>machine-id</replaceable>/</filename> + with the <literal>.journal</literal> suffix. If the daemon is + stopped uncleanly, or if the files are found to be corrupted, + they are renamed using the <literal>.journal~</literal> + suffix, and <command>systemd-journald</command> starts writing + to a new file. <filename>/run</filename> is used when + <filename>/var/log/journal</filename> is not available, or + when <option>Storage=volatile</option> is set in the + <citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> + configuration file.</para></listitem> + </varlistentry> + + <varlistentry> + <term><filename>/dev/kmsg</filename></term> + <term><filename>/dev/log</filename></term> + <term><filename>/run/systemd/journal/dev-log</filename></term> + <term><filename>/run/systemd/journal/socket</filename></term> + <term><filename>/run/systemd/journal/stdout</filename></term> + + <listitem><para>Sockets and other paths that + <command>systemd-journald</command> will listen on that are + visible in the file system. In addition to these, journald can + listen for audit events using netlink.</para></listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd-journal</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-coredump</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry project='die-net'><refentrytitle>setfacl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd_journal_print</refentrytitle><manvolnum>4</manvolnum></citerefentry>, + <command>pydoc systemd.journal</command> + </para> + </refsect1> + +</refentry> diff --git a/src/grp-journal/systemd-journald/systemd-journald.socket b/src/grp-journal/systemd-journald/systemd-journald.socket new file mode 100644 index 0000000000..71737014ca --- /dev/null +++ b/src/grp-journal/systemd-journald/systemd-journald.socket @@ -0,0 +1,26 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[Unit] +Description=Journal Socket +Documentation=man:systemd-journald.service(8) man:journald.conf(5) +DefaultDependencies=no +Before=sockets.target + +# Mount and swap units need this. If this socket unit is removed by an +# isolate request the mount and swap units would be removed too, +# hence let's exclude this from isolate requests. +IgnoreOnIsolate=yes + +[Socket] +ListenStream=/run/systemd/journal/stdout +ListenDatagram=/run/systemd/journal/socket +SocketMode=0666 +PassCredentials=yes +PassSecurity=yes +ReceiveBuffer=8M +Service=systemd-journald.service diff --git a/src/grp-journal/systemd-journald/systemd-journald.sysusers b/src/grp-journal/systemd-journald/systemd-journald.sysusers new file mode 100644 index 0000000000..dcb01f606a --- /dev/null +++ b/src/grp-journal/systemd-journald/systemd-journald.sysusers @@ -0,0 +1,8 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +g systemd-journal - - diff --git a/src/grp-journal/systemd-journald/systemd-journald.tmpfiles.m4 b/src/grp-journal/systemd-journald/systemd-journald.tmpfiles.m4 new file mode 100644 index 0000000000..2e8bd8cbef --- /dev/null +++ b/src/grp-journal/systemd-journald/systemd-journald.tmpfiles.m4 @@ -0,0 +1,55 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +# See tmpfiles.d(5) for details + +d /run/log 0755 root root - + +z /run/log/journal 2755 root systemd-journal - - +Z /run/log/journal/%m ~2750 root systemd-journal - - +m4_ifdef(`HAVE_ACL',`m4_dnl +m4_ifdef(`ENABLE_ADM_GROUP',`m4_dnl +m4_ifdef(`ENABLE_WHEEL_GROUP',`` +a+ /run/log/journal/%m - - - - d:group:adm:r-x,d:group:wheel:r-x +a+ /run/log/journal/%m - - - - group:adm:r-x,group:wheel:r-x +a+ /run/log/journal/%m/*.journal* - - - - group:adm:r--,group:wheel:r-- +'',`` +a+ /run/log/journal/%m - - - - d:group:adm:r-x +a+ /run/log/journal/%m - - - - group:adm:r-x +a+ /run/log/journal/%m/*.journal* - - - - group:adm:r-- +'')',`m4_dnl +m4_ifdef(`ENABLE_WHEEL_GROUP',`` +a+ /run/log/journal/%m - - - - d:group:wheel:r-x +a+ /run/log/journal/%m - - - - group:wheel:r-x +a+ /run/log/journal/%m/*.journal* - - - - group:wheel:r-- +'')')')m4_dnl + +z /var/log/journal 2755 root systemd-journal - - +z /var/log/journal/%m 2755 root systemd-journal - - +z /var/log/journal/%m/system.journal 0640 root systemd-journal - - +m4_ifdef(`HAVE_ACL',`m4_dnl +m4_ifdef(`ENABLE_ADM_GROUP',`m4_dnl +m4_ifdef(`ENABLE_WHEEL_GROUP',`` +a+ /var/log/journal - - - - d:group:adm:r-x,d:group:wheel:r-x +a+ /var/log/journal - - - - group:adm:r-x,group:wheel:r-x +a+ /var/log/journal/%m - - - - d:group:adm:r-x,d:group:wheel:r-x +a+ /var/log/journal/%m - - - - group:adm:r-x,group:wheel:r-x +a+ /var/log/journal/%m/system.journal - - - - group:adm:r--,group:wheel:r-- +'', `` +a+ /var/log/journal - - - - d:group:adm:r-x +a+ /var/log/journal - - - - group:adm:r-x +a+ /var/log/journal/%m - - - - d:group:adm:r-x +a+ /var/log/journal/%m - - - - group:adm:r-x +a+ /var/log/journal/%m/system.journal - - - - group:adm:r-- +'')',`m4_dnl +m4_ifdef(`ENABLE_WHEEL_GROUP',`` +a+ /var/log/journal - - - - d:group:wheel:r-x +a+ /var/log/journal - - - - group:wheel:r-x +a+ /var/log/journal/%m - - - - d:group:wheel:r-x +a+ /var/log/journal/%m - - - - group:wheel:r-x +a+ /var/log/journal/%m/system.journal - - - - group:wheel:r-- +'')')')m4_dnl |