Chassisd to monitor cards in a modular chassis (#5523)

HLD: Azure/SONiC#646

Introducing chassisd process to monitor status of the control, line and fabric cards in a modular chassis.

- Why I did it
Modular Chassis has control-cards, line-cards and fabric-cards along with other peripherals. Chassisd will be a central entity that has visibility of the entire chassis.

- How I did it
Chassisd process will monitor cards in the main thread. Another configuation_handling_task is created to listen to CONFIG_DB for admin_status up/down events. The monitored status is persisted in REDIS-DB.

dockers/docker-platform-monitor/docker-pmon.supervisord.conf.j2

@@ -38,6 +38,19 @@ startsecs=0
 dependent_startup=true
 dependent_startup_wait_for=rsyslogd:running
 
+{% if not skip_chassisd and IS_MODULAR_CHASSIS == 1 %}
+[program:chassisd]
+command=/usr/local/bin/chassisd
+priority=3
+autostart=false
+autorestart=false
+stdout_logfile=syslog
+stderr_logfile=syslog
+startsecs=0
+dependent_startup=true
+dependent_startup_wait_for=rsyslogd:running
+{% endif %}
+
 {% if not skip_sensors and HAVE_SENSORS_CONF == 1 %}
 [program:lm-sensors]
 command=/usr/bin/lm-sensors.sh

dockers/docker-platform-monitor/docker_init.sh

@@ -5,9 +5,11 @@ mkdir -p /etc/supervisor/conf.d/
 
 SENSORS_CONF_FILE="/usr/share/sonic/platform/sensors.conf"
 FANCONTROL_CONF_FILE="/usr/share/sonic/platform/fancontrol"
+MODULAR_CHASSISDB_CONF_FILE="/usr/share/sonic/platform/chassisdb.conf"
 
 HAVE_SENSORS_CONF=0
 HAVE_FANCONTROL_CONF=0
+IS_MODULAR_CHASSIS=0
 
 if [ -e $SENSORS_CONF_FILE ]; then
     HAVE_SENSORS_CONF=1
@@ -17,7 +19,11 @@ if [ -e $FANCONTROL_CONF_FILE ]; then
     HAVE_FANCONTROL_CONF=1
 fi
 
-confvar="{\"HAVE_SENSORS_CONF\":$HAVE_SENSORS_CONF, \"HAVE_FANCONTROL_CONF\":$HAVE_FANCONTROL_CONF}"
+if [ -e $MODULAR_CHASSISDB_CONF_FILE ]; then
+    IS_MODULAR_CHASSIS=1
+fi
+
+confvar="{\"HAVE_SENSORS_CONF\":$HAVE_SENSORS_CONF, \"HAVE_FANCONTROL_CONF\":$HAVE_FANCONTROL_CONF, \"IS_MODULAR_CHASSIS\":$IS_MODULAR_CHASSIS}"
 
 if [ -e /usr/share/sonic/platform/pmon_daemon_control.json ];
 then

rules/docker-platform-monitor.mk

@@ -6,7 +6,8 @@ DOCKER_PLATFORM_MONITOR_DBG = $(DOCKER_PLATFORM_MONITOR_STEM)-$(DBG_IMAGE_MARK).
 
 $(DOCKER_PLATFORM_MONITOR)_PATH = $(DOCKERS_PATH)/$(DOCKER_PLATFORM_MONITOR_STEM)
 
-$(DOCKER_PLATFORM_MONITOR)_DEPENDS += $(LIBSENSORS) $(LM_SENSORS) $(FANCONTROL) $(SENSORD) $(LIBSWSSCOMMON) $(PYTHON_SWSSCOMMON) $(SMARTMONTOOLS)
+$(DOCKER_PLATFORM_MONITOR)_DEPENDS += $(LIBSENSORS) $(LM_SENSORS) $(FANCONTROL) $(SENSORD) $(LIBSWSSCOMMON) $(PYTHON_SWSSCOMMON) $(PYTHON3_SWSSCOMMON) $(SMARTMONTOOLS)
+
 $(DOCKER_PLATFORM_MONITOR)_PYTHON_WHEELS += $(SONIC_PLATFORM_COMMON_PY2)
 $(DOCKER_PLATFORM_MONITOR)_PYTHON_WHEELS += $(SONIC_PLATFORM_COMMON_PY3)
 $(DOCKER_PLATFORM_MONITOR)_PYTHON_WHEELS += $(SWSSSDK_PY2)
@@ -21,6 +22,8 @@ $(DOCKER_PLATFORM_MONITOR)_PYTHON_WHEELS += $(SONIC_PSUD)
 $(DOCKER_PLATFORM_MONITOR)_PYTHON_WHEELS += $(SONIC_SYSEEPROMD)
 $(DOCKER_PLATFORM_MONITOR)_PYTHON_WHEELS += $(SONIC_THERMALCTLD)
 $(DOCKER_PLATFORM_MONITOR)_PYTHON_WHEELS += $(SONIC_XCVRD)
+$(DOCKER_PLATFORM_MONITOR)_PYTHON_WHEELS += $(SONIC_CHASSISD_PY3)
+
 ifeq ($(PDDF_SUPPORT),y)
 $(DOCKER_PLATFORM_MONITOR)_PYTHON_WHEELS += $(PDDF_PLATFORM_API_BASE_PY2)
 endif

rules/sonic-chassisd.dep

@@ -0,0 +1,10 @@
+SPATH       := $($(SONIC_CHASSISD_PY3)_SRC_PATH)
+DEP_FILES   := $(SONIC_COMMON_FILES_LIST) rules/sonic-chassisd.mk rules/sonic-chassisd.dep
+DEP_FILES   += $(SONIC_COMMON_BASE_FILES_LIST)
+SMDEP_FILES := $(addprefix $(SPATH)/,$(shell cd $(SPATH) && git ls-files))
+
+$(SONIC_CHASSISD_PY3)_CACHE_MODE  := GIT_CONTENT_SHA
+$(SONIC_CHASSISD_PY3)_DEP_FLAGS   := $(SONIC_COMMON_FLAGS_LIST)
+$(SONIC_CHASSISD_PY3)_DEP_FILES   := $(DEP_FILES)
+$(SONIC_CHASSISD_PY3)_SMDEP_FILES := $(SMDEP_FILES)
+$(SONIC_CHASSISD_PY3)_SMDEP_PATHS := $(SPATH)

rules/sonic-chassisd.mk

@@ -0,0 +1,8 @@
+# sonic-chassisd (SONiC Chassis mgmt daemon) wheel package
+
+SONIC_CHASSISD_PY3 = sonic_chassisd-1.0-py3-none-any.whl
+$(SONIC_CHASSISD_PY3)_SRC_PATH = $(SRC_PATH)/sonic-platform-daemons/sonic-chassisd
+$(SONIC_CHASSISD_PY3)_DEPENDS = $(SONIC_PY_COMMON_PY3)
+$(SONIC_CHASSISD_PY3)_DEBS_DEPENDS = $(LIBSWSSCOMMON) $(PYTHON3_SWSSCOMMON)
+$(SONIC_CHASSISD_PY3)_PYTHON_VERSION = 3
+SONIC_PYTHON_WHEELS += $(SONIC_CHASSISD_PY3)