[201911][Monit] Monitor critical processes in PMon contianer. (#7438)

Signed-off-by: Yong Zhao yozhao@microsoft.com

Why I did it
This PR aims to monitor the critical processes in PMon container by Monit in 201911 branch.

How I did it
I created a template configuration file of Monit and it will be rendered to generate Monit configuration file of PMon container
by a service generate_monit_config.service.

How to verify it
I verified this on a Mellanox device str-msn2700-03 and an Arista device str-a7050-acs-1.

Which release branch to backport (provide reason below if selected)
 201811
[x ] 201911
 202006
 202012

dockers/docker-platform-monitor/base_image_files/monit_pmon.j2

@@ -0,0 +1,61 @@
+{# This template file is used to generate Monit configuration file of platform monitor container -#}
+
+###############################################################################
+## Monit configuration file for PMon container
+## process list:
+{% if not skip_fancontrol and HAVE_FANCONTROL_CONF == 1 %}
+##  fancontrol
+{% endif %}
+{% if not skip_ledd %}
+##  ledd
+{% endif %}
+{% if not skip_psud %}
+##  psud
+{% endif %}
+{% if not skip_sensors and HAVE_SENSORS_CONF == 1 %}
+##  sensord
+{% endif %}
+{% if not skip_syseepromd %}
+##  syseepromd
+{% endif %}
+{% if not skip_thermalctld %}
+##  thermalctld
+{% endif %}
+{% if not skip_xcvrd %}
+##  xcvrd
+{% endif %}
+###############################################################################
+{% if not skip_fancontrol and HAVE_FANCONTROL_CONF == 1 %}
+check program pmon|fancontrol with path "/usr/bin/process_checker pmon /bin/bash /usr/sbin/fancontrol"
+    if status != 0 for 5 times within 5 cycles then alert repeat every 1 cycles
+{% endif %}
+
+{% if not skip_ledd %}
+check program pmon|ledd with path "/usr/bin/process_checker pmon /usr/bin/python /usr/bin/ledd"
+    if status != 0 for 5 times within 5 cycles then alert repeat every 1 cycles
+{% endif %}
+
+{% if not skip_psud %}
+check program pmon|psud with path "/usr/bin/process_checker pmon /usr/bin/python /usr/bin/psud"
+    if status != 0 for 5 times within 5 cycles then alert repeat every 1 cycles
+{% endif %}
+
+{% if not skip_sensors and HAVE_SENSORS_CONF == 1 %}
+check program pmon|sensord with path "/usr/bin/process_checker pmon /usr/sbin/sensord -f daemon"
+    if status != 0 for 5 times within 5 cycles then alert repeat every 1 cycles
+{% endif %}
+
+{% if not skip_syseepromd %}
+check program pmon|syseepromd with path "/usr/bin/process_checker pmon /usr/bin/python /usr/bin/syseepromd"
+    if status != 0 for 5 times within 5 cycles then alert repeat every 1 cycles
+{% endif %}
+
+{% if not skip_thermalctld %}
+check program pmon|thermalctld with path "/usr/bin/process_checker pmon /usr/bin/python /usr/bin/thermalctld"
+    if status != 0 for 5 times within 5 cycles then alert repeat every 1 cycles
+{% endif %}
+
+{% if not skip_xcvrd %}
+check program pmon|xcvrd with path "/usr/bin/process_checker pmon /usr/bin/python /usr/bin/xcvrd"
+    if status != 0 for 5 times within 5 cycles then alert repeat every 1 cycles
+{%- endif -%}

files/image_config/monit/generate_monit_config

@@ -1,12 +1,39 @@
 #!/bin/bash
 
 # Generate the following files from templates:
-# 1. Monit configuration file of radv container
+# 1. Monit configuration file of dhcp_relay container
-# 2. Monit configuration file of dhcp_relay container
+# 2. Monit configuration file of PMon container
+# 3. Monit configuration file of radv container
 
 CFGGEN_PARAMS=" \
     -d \
-    -t /usr/share/sonic/templates/monit_radv.j2,/etc/monit/conf.d/monit_radv \
     -t /usr/share/sonic/templates/monit_dhcp_relay.j2,/etc/monit/conf.d/monit_dhcp_relay \
+    -t /usr/share/sonic/templates/monit_radv.j2,/etc/monit/conf.d/monit_radv \
 "
 sonic-cfggen $CFGGEN_PARAMS
+
+PLATFORM=$(sonic-cfggen -d -v DEVICE_METADATA.localhost.platform 2> /dev/null)
+
+if [[ $? == 0 && $PLATFORM != "" ]]; then
+    SENSORS_CONF_FILE="/usr/share/sonic/device/$PLATFORM/sensors.conf" 
+    FANCONTROL_CONF_FILE="/usr/share/sonic/device/$PLATFORM/fancontrol" 
+
+    HAVE_SENSORS_CONF=0
+    HAVE_FANCONTROL_CONF=0
+
+    if [ -e $SENSORS_CONF_FILE ]; then
+        HAVE_SENSORS_CONF=1
+    fi	
+
+    if [ -e $FANCONTROL_CONF_FILE ]; then
+        HAVE_FANCONTROL_CONF=1
+    fi
+
+    confvar="{\"HAVE_SENSORS_CONF\":$HAVE_SENSORS_CONF, \"HAVE_FANCONTROL_CONF\":$HAVE_FANCONTROL_CONF}"
+
+    if [ -e /usr/share/sonic/device/$PLATFORM/pmon_daemon_control.json ]; then
+        sonic-cfggen -j /usr/share/sonic/device/$PLATFORM/pmon_daemon_control.json -a "$confvar" -t /usr/share/sonic/template/monit_pmon.j2,/etc/monit/conf.d/monit_pmon
+    else
+        sonic-cfggen -a "$confvar" -t /usr/share/sonic/template/monit_pmon.j2,/etc/monit/conf.d/monit_pmon
+    fi
+fi

rules/docker-platform-monitor.mk

@@ -46,4 +46,5 @@ $(DOCKER_PLATFORM_MONITOR)_BASE_IMAGE_FILES += cmd_wrapper:/usr/bin/sensors
 $(DOCKER_PLATFORM_MONITOR)_BASE_IMAGE_FILES += cmd_wrapper:/usr/sbin/smartctl
 $(DOCKER_PLATFORM_MONITOR)_BASE_IMAGE_FILES += cmd_wrapper:/usr/sbin/iSmart
 $(DOCKER_PLATFORM_MONITOR)_BASE_IMAGE_FILES += cmd_wrapper:/usr/sbin/SmartCmd
+$(DOCKER_PLATFORM_MONITOR)_BASE_IMAGE_FILES += monit_pmon.j2:/usr/share/sonic/templates
 $(DOCKER_PLATFORM_MONITOR)_FILES += $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)