[swss]: Run tunnel_pkt_handler on dualtor only (#11626)

At SWSS docker init time, check the device subtype and enable tunnel packet handler only if it is dualtor

Signed-off-by: Lawrence Lee <lawlee@microsoft.com>

dockers/docker-orchagent/Dockerfile.j2

@@ -74,7 +74,7 @@ RUN apt-get purge -y          \
 
 COPY ["files/arp_update", "/usr/bin"]
 COPY ["arp_update.conf", "files/arp_update_vars.j2", "/usr/share/sonic/templates/"]
-COPY ["ndppd.conf", "/usr/share/sonic/templates/"]
+COPY ["ndppd.conf", "tunnel_packet_handler.conf", "/usr/share/sonic/templates/"]
 COPY ["enable_counters.py", "tunnel_packet_handler.py", "/usr/bin/"]
 COPY ["docker-init.sh", "orchagent.sh", "swssconfig.sh", "buffermgrd.sh", "/usr/bin/"]
 COPY ["supervisord.conf", "/etc/supervisor/conf.d/"]

dockers/docker-orchagent/docker-init.sh

@@ -13,6 +13,7 @@ CFGGEN_PARAMS=" \
     -t /usr/share/sonic/templates/wait_for_link.sh.j2,/usr/bin/wait_for_link.sh \
 "
 VLAN=$(sonic-cfggen $CFGGEN_PARAMS)
+SUBTYPE=$(sonic-cfggen -d -v "DEVICE_METADATA['localhost']['subtype']")
 
 chmod +x /usr/bin/wait_for_link.sh
 
@@ -27,4 +28,8 @@ if [ "$VLAN" != "" ]; then
     cp /usr/share/sonic/templates/ndppd.conf /etc/supervisor/conf.d/
 fi
 
+if [ "$SUBTYPE" == "DualToR" ]; then
+    cp /usr/share/sonic/templates/tunnel_packet_handler.conf /etc/supervisor/conf.d/
+fi
+
 exec /usr/local/bin/supervisord

dockers/docker-orchagent/supervisord.conf

@@ -205,13 +205,3 @@ stdout_logfile=syslog
 stderr_logfile=syslog
 dependent_startup=true
 dependent_startup_wait_for=swssconfig:exited
-
-[program:tunnel_packet_handler]
-command=/usr/bin/tunnel_packet_handler.py
-priority=12
-autostart=false
-autorestart=unexpected
-stdout_logfile=syslog
-stderr_logfile=syslog
-dependent_startup=true
-dependent_startup_wait_for=swssconfig:exited

dockers/docker-orchagent/tunnel_packet_handler.conf

@@ -0,0 +1,9 @@
+[program:tunnel_packet_handler]
+command=/usr/bin/tunnel_packet_handler.py
+priority=12
+autostart=false
+autorestart=unexpected
+stdout_logfile=syslog
+stderr_logfile=syslog
+dependent_startup=true
+dependent_startup_wait_for=swssconfig:exited