syslog changes Multi NPU platforms

files/build_templates/docker_image_ctl.j2

@@ -27,6 +27,22 @@ link_namespace() {
 }
 {%- endif %}
 
+function updateSyslogConf()
+{
+    # On multiNPU platforms, change the syslog target ip to docker0 ip to allow logs from containers
+    # running on the namespace to reach the rsyslog service running on the host
+    # Also update the container name  
+    if [[ ($NUM_ASIC -gt 1) ]]; then
+        TARGET_IP=$(docker network inspect bridge --format={{ "'{{(index .IPAM.Config 0).Gateway}}'" }})
+        CONTAINER_NAME="{{docker_container_name}}$DEV"
+        TMP_FILE="/tmp/rsyslog.$CONTAINER_NAME.conf"
+
+        sonic-cfggen -t /usr/share/sonic/templates/rsyslog-container.conf.j2 -a "{\"target_ip\": \"$TARGET_IP\", \"container_name\": \"$CONTAINER_NAME\" }"  > $TMP_FILE
+        docker cp $TMP_FILE {{docker_container_name}}$DEV:/etc/rsyslog.conf
+        rm -rf $TMP_FILE
+    fi
+}
+
 function getMountPoint()
 {
     echo $1 | python -c "import sys, json, os; mnts = [x for x in json.load(sys.stdin)[0]['Mounts'] if x['Destination'] == '/usr/share/sonic/hwsku']; print '' if len(mnts) == 0 else os.path.basename(mnts[0]['Source'])" 2>/dev/null
@@ -68,6 +84,7 @@ function preStartAction()
 {%- else %}
     : # nothing
 {%- endif %}
+    updateSyslogConf
 }
 
 function postStartAction()

files/build_templates/sonic_debian_extension.j2

@@ -235,6 +235,7 @@ echo "warmboot-finalizer.service" | sudo tee -a $GENERATED_SERVICE_FILE
 sudo cp $IMAGE_CONFIGS/rsyslog/rsyslog-config.service $FILESYSTEM_ROOT_USR_LIB_SYSTEMD_SYSTEM
 sudo cp $IMAGE_CONFIGS/rsyslog/rsyslog-config.sh $FILESYSTEM_ROOT/usr/bin/
 sudo cp $IMAGE_CONFIGS/rsyslog/rsyslog.conf.j2 $FILESYSTEM_ROOT_USR_SHARE_SONIC_TEMPLATES/
+sudo cp $IMAGE_CONFIGS/rsyslog/rsyslog-container.conf.j2 $FILESYSTEM_ROOT_USR_SHARE_SONIC_TEMPLATES/
 sudo cp $IMAGE_CONFIGS/rsyslog/rsyslog.d/* $FILESYSTEM_ROOT/etc/rsyslog.d/
 echo "rsyslog-config.service" | sudo tee -a $GENERATED_SERVICE_FILE
 

files/image_config/rsyslog/rsyslog-config.sh

@@ -1,4 +1,23 @@
 #!/bin/bash
 
-sonic-cfggen -d -t /usr/share/sonic/templates/rsyslog.conf.j2 >/etc/rsyslog.conf
+PLATFORM=`sonic-cfggen -H -v DEVICE_METADATA.localhost.platform`
+
+# Parse the device specific asic conf file, if it exists
+ASIC_CONF=/usr/share/sonic/device/$PLATFORM/asic.conf
+if [ -f "$ASIC_CONF" ]; then
+    source $ASIC_CONF
+fi
+
+# On Multi NPU platforms we need to start  the rsyslog server on the docker0 ip address
+# for the syslogs from the containers in the namespaces to work.
+# on Single NPU platforms we continue to use loopback adddres
+
+if [[ ($NUM_ASIC -gt 1) ]]; then
+    udp_server_ip=$(ip -o -4 addr list docker0 | awk '{print $4}' | cut -d/ -f1)
+else
+    udp_server_ip=$(ip -o -4 addr list lo scope host | awk '{print $4}' | cut -d/ -f1)
+fi
+
+sonic-cfggen -d -t /usr/share/sonic/templates/rsyslog.conf.j2 -a "{\"udp_server_ip\": \"$udp_server_ip\"}"  >/etc/rsyslog.conf
+
 systemctl restart rsyslog

files/image_config/rsyslog/rsyslog-container.conf.j2

@@ -0,0 +1,76 @@
+#
+#  /etc/rsyslog.conf    Configuration file for rsyslog.
+#
+#                       For more information see
+#                       /usr/share/doc/rsyslog-doc/html/rsyslog_conf.html
+
+
+#################
+#### MODULES ####
+#################
+
+$ModLoad imuxsock # provides support for local system logging
+
+#
+# Set a rate limit on messages from the container
+#
+$SystemLogRateLimitInterval 300
+$SystemLogRateLimitBurst 20000
+
+#$ModLoad imklog  # provides kernel logging support
+#$ModLoad immark  # provides --MARK-- message capability
+
+# provides UDP syslog reception
+#$ModLoad imudp
+#$UDPServerRun 514
+
+# provides TCP syslog reception
+#$ModLoad imtcp
+#$InputTCPServerRun 514
+
+
+###########################
+#### GLOBAL DIRECTIVES ####
+###########################
+
+# Set remote syslog server
+template (name="ForwardFormatInContainer" type="string" string="<%PRI%>%TIMESTAMP:::date-rfc3339% %HOSTNAME% {{container_name}}#%syslogtag%%msg:::sp-if-no-1st-sp%%msg%")
+*.* action(type="omfwd" target="{{target_ip}}" port="514" protocol="udp" Template="ForwardFormatInContainer")
+
+#
+# Use traditional timestamp format.
+# To enable high precision timestamps, comment out the following line.
+#
+#$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat
+
+# Define a custom template
+$template SONiCFileFormat,"%TIMESTAMP%.%timestamp:::date-subseconds% %HOSTNAME% %syslogseverity-text:::uppercase% {{container_name}}#%syslogtag%%msg:::sp-if-no-1st-sp%%msg:::drop-last-lf%\n"
+$ActionFileDefaultTemplate SONiCFileFormat
+
+#
+# Set the default permissions for all log files.
+#
+$FileOwner root
+$FileGroup adm
+$FileCreateMode 0640
+$DirCreateMode 0755
+$Umask 0022
+
+#
+# Where to place spool and state files
+#
+$WorkDirectory /var/spool/rsyslog
+
+#
+# Include all config files in /etc/rsyslog.d/
+#
+$IncludeConfig /etc/rsyslog.d/*.conf
+
+#
+# Suppress duplicate messages and report "message repeated n times"
+#
+$RepeatedMsgReduction on
+
+###############
+#### RULES ####
+###############

files/image_config/rsyslog/rsyslog.conf.j2

@@ -19,7 +19,7 @@ $ModLoad imklog   # provides kernel logging support
 
 # provides UDP syslog reception
 $ModLoad imudp
-$UDPServerAddress 127.0.0.1 # bind to localhost before udp server run
+$UDPServerAddress {{udp_server_ip}}  #bind to localhost before udp server run
 $UDPServerRun 514
 
 # provides TCP syslog reception