Merge swss and syncd into single service (sonic-net#334)

Current implementation of swss and syncd causes a lot
of problems in terms of dependencies and synchronization.
Instead of handling them in separate services, we now
start and stop them both as a single entity.

Signed-off-by: marian-pritsak <marianp@mellanox.com>

files/build_templates/sonic_debian_extension.j2

@@ -184,8 +184,10 @@ sudo chroot $FILESYSTEM_ROOT service docker stop
 sudo cp {{script}} $FILESYSTEM_ROOT/usr/bin/
 {% endfor %}
 {% for service in installer_services.split(' ') -%}
-sudo cp {{service}} $FILESYSTEM_ROOT/etc/systemd/system/
-sudo LANG=C chroot $FILESYSTEM_ROOT systemctl enable {{service}}
+if [ -f {{service}} ]; then
+    sudo cp {{service}} $FILESYSTEM_ROOT/etc/systemd/system/
+    sudo LANG=C chroot $FILESYSTEM_ROOT systemctl enable {{service}}
+fi
 {% endfor %}
 sudo LANG=C chroot $FILESYSTEM_ROOT fuser -km /sys || true
 sudo LANG=C chroot $FILESYSTEM_ROOT umount -lf /sys

files/build_templates/swss.service.j2

@@ -1,18 +1,40 @@
 [Unit]
-Description=switch state service container
+Description=switch state service
 Requires=database.service
 After=database.service
 
 [Service]
-User={{ sonicadmin_user }}
 # Wait for redis server start before database clean
 ExecStartPre=/bin/bash -c "while true; do if [ \"$(/usr/bin/docker exec database redis-cli ping)\" == \"PONG\" ]; then break; fi; sleep 1; done"
 ExecStartPre=/usr/bin/docker exec database redis-cli -n 0 FLUSHDB
 ExecStartPre=/usr/bin/docker exec database redis-cli -n 1 FLUSHDB
 ExecStartPre=/usr/bin/docker exec database redis-cli -n 2 FLUSHDB
-ExecStart=/usr/bin/{{docker_container_name}}.sh start
+
+{% if sonic_hwsku == 'ACS-MSN2700' %}
+ExecStartPre=/etc/init.d/sxdkernel start
+ExecStartPre=/usr/bin/mst start
+ExecStartPre=/etc/mlnx/msn2700 start
+{% elif sonic_hwsku == 'AS7512' %}
+ExecStartPre=-/etc/init.d/xpnet.sh stop
+ExecStartPre=/etc/init.d/xpnet.sh start
+{% endif %}
+
+# systemd allows only one parent process within service,
+# so we spawn both dockers from single bash parent
+ExecStart=/bin/bash -c "/usr/bin/{{docker_container_name}}.sh start & /usr/bin/syncd.sh start & wait -n 0"
+
 ExecStop=/usr/bin/{{docker_container_name}}.sh stop
 ExecStopPost=/usr/bin/syncd.sh stop
 
+{% if sonic_hwsku == 'ACS-MSN2700' %}
+ExecStopPost=/etc/mlnx/msn2700 stop
+ExecStopPost=/etc/init.d/sxdkernel stop
+ExecStopPost=/usr/bin/mst stop
+{% elif sonic_hwsku == 'AS7512' %}
+ExecStopPost=/etc/init.d/xpnet.sh stop
+ExecStopPost=/etc/init.d/xpnet.sh start
+{% endif %}
+
+
 [Install]
 WantedBy=multi-user.target

slave.mk

@@ -322,7 +322,9 @@ $(addprefix $(TARGET_PATH)/, $(SONIC_INSTALLERS)) : $(TARGET_PATH)/% : .platform
 		export docker_container_name="$($(docker)_CONTAINER_NAME)"
 		export docker_image_run_opt="$($(docker)_RUN_OPT)"
 		j2 files/build_templates/docker_image_ctl.j2 > $($(docker)_CONTAINER_NAME).sh
-		j2 files/build_templates/$($(docker)_CONTAINER_NAME).service.j2 > $($(docker)_CONTAINER_NAME).service
+		if [ -f files/build_templates/$($(docker)_CONTAINER_NAME).service.j2 ]; then
+			j2 files/build_templates/$($(docker)_CONTAINER_NAME).service.j2 > $($(docker)_CONTAINER_NAME).service
+		fi
 		chmod +x $($(docker)_CONTAINER_NAME).sh
 	)
 
@@ -342,8 +344,8 @@ $(addprefix $(TARGET_PATH)/, $(SONIC_INSTALLERS)) : $(TARGET_PATH)/% : .platform
 	TARGET_MACHINE=$($*_MACHINE) IMAGE_TYPE=$($*_IMAGE_TYPE) DEBUG_BUILD=$(DEBUG_BUILD) ./build_image.sh $(LOG)
 
 	$(foreach docker, $($*_DOCKERS), \
-		rm $($(docker)_CONTAINER_NAME).sh
-		rm $($(docker)_CONTAINER_NAME).service
+		rm -f $($(docker)_CONTAINER_NAME).sh
+		rm -f $($(docker)_CONTAINER_NAME).service
 	)
 
 	$(if $($*_DOCKERS),