Use imjournal for rsyslogd instead of sharing /dev/log with journal (#1369439)

Resolves: rhbz#1369439

Rsyslogd used to read messages from /dev/log together with systemd-journald
which resulted in NetworkManager messages not being passed to syslog due to a
race condition during starting NetworkManager and rsyslogd service. So use
imjournal rsyslog plugin that picks messages from journald instead of using the
/dev/log socket. Same as regular RHEL 7 system.

share/config_files/common/rsyslog.conf

@@ -1,7 +1,24 @@
+# rsyslog configuration file
+
+# For more information see /usr/share/doc/rsyslog-*/rsyslog_conf.html
+# If you experience problems, see http://www.rsyslog.com/doc/troubleshoot.html
+
 #### MODULES ####
-$ModLoad imuxsock.so          # provides support for local system logging
+
+# The imjournal module bellow is now used as a message source instead of imuxsock.
+$ModLoad imuxsock # provides support for local system logging (e.g. via logger command)
 $SystemLogRateLimitInterval 0 # disables message dropping, we need all of them
-$ModLoad imklog.so            # provides kernel logging support
+$ModLoad imjournal # provides access to the systemd journal
+$ModLoad imklog # reads kernel messages (the same are read from journald)
+#$ModLoad immark  # provides --MARK-- message capability
+
+# Provides UDP syslog reception
+#$ModLoad imudp
+#$UDPServerRun 514
+
+# Provides TCP syslog reception
+#$ModLoad imtcp
+#$InputTCPServerRun 514
 
 $ModLoad imfile
 $InputFileName /tmp/X.log
@@ -15,10 +32,29 @@ $InputFileStateFile anaconda-tb-statefile
 $InputFileFacility local1
 $InputRunFileMonitor
 
+
 #### GLOBAL DIRECTIVES ####
+
+# Where to place auxiliary files
+#$WorkDirectory /var/lib/rsyslog
+
 # Use default timestamp format
 $ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat
 
+# File syncing capability is disabled by default. This feature is usually not required,
+# not useful and an extreme performance hit
+#$ActionFileEnableSync on
+
+# Include all config files in /etc/rsyslog.d/
+$IncludeConfig /etc/rsyslog.d/*.conf
+
+# Turn off message reception via local log socket;
+# local messages are retrieved through imjournal now.
+$OmitLocalLogging on
+
+# File to store the position in the journal
+$IMJournalStateFile imjournal.state
+
 #### TEMPLATES ####
 
 $template anaconda_tty4, "%syslogseverity-text:::uppercase% %programname%:%msg%\n"
@@ -26,24 +62,29 @@ $template anaconda_syslog, "%timestamp:8:$:date-rfc3164%,%timestamp:1:3:date-sub
 $template virtio_ForwardFormat, "<%PRI%>%TIMESTAMP:::date-rfc3339% localhost %syslogtag:1:32%%msg:::sp-if-no-1st-sp%%msg%\n"
 
 #### RULES ####
+
 # log everything except anaconda-specific records from local1 (those are stored
 # directly into files via python logging)
+
 *.*;\
 authpriv.none;\
 local1.none             /tmp/syslog;anaconda_syslog
                         & /dev/tty4;anaconda_tty4
 
+
 # ### begin forwarding rule ###
 # The statement between the begin ... end define a SINGLE forwarding
 # rule. They belong together, do NOT split them. If you create multiple
 # forwarding rules, duplicate the whole block!
+# Remote Logging (we use TCP for reliable delivery)
 #
 # An on-disk queue is created for this action. If the remote host is
 # down, messages are spooled to disk and sent when it is up again.
+#$ActionQueueFileName fwdRule1 # unique name prefix for spool files
 $ActionQueueMaxDiskSpace 1m     # space limit (use as much as possible)
 $ActionQueueSaveOnShutdown off  # do not save messages to disk on shutdown
-$ActionQueueType LinkedList     # run asynchronously
-$ActionResumeRetryCount -1      # infinite retries if host is down
+#$ActionQueueType LinkedList   # run asynchronously
+#$ActionResumeRetryCount -1    # infinite retries if host is down
 # remote host is: name/ip:port, e.g. 192.168.0.1:514, port optional
+#*.* @@remote-host:514
 # ### end of the forwarding rule ###
-