[config reload]Config Reload Enhancement (#13969)

#### Why I did it
Implementing code changes for sonic-net/SONiC#1203

#### How I did it
Removed the timers and delayed target since the delayed services would start based on event driven approach.
Cleared port table during config reload and cold reboot scenario.
Modified yang model, init_cfg.json to change has_timer to delayed

#### How to verify it
Running regression

files/build_templates/init_cfg.json.j2

@@ -55,11 +55,11 @@
 {%- if include_macsec == "y" %}{% do features.append(("macsec", "{% if 'type' in DEVICE_METADATA['localhost'] and DEVICE_METADATA['localhost']['type'] == 'SpineRouter' and DEVICE_RUNTIME_METADATA['MACSEC_SUPPORTED'] %}enabled{% else %}disabled{% endif %}", false, "enabled")) %}{% endif %}
 {%- if include_system_telemetry == "y" %}{% do features.append(("telemetry", "enabled", true, "enabled")) %}{% endif %}
     "FEATURE": {
-{# has_timer field if set, will start the feature systemd .timer unit instead of .service unit #}
-{%- for feature, state, has_timer, autorestart in features %}
+{# delayed field if set, will start the feature systemd .timer unit instead of .service unit #}
+{%- for feature, state, delayed, autorestart in features %}
         "{{feature}}": {
             "state": "{{state}}",
-            "has_timer" : {{has_timer | lower()}},
+            "delayed" : {{delayed | lower()}},
             "has_global_scope": {% if feature + '.service' in installer_services.split(' ') %}true{% else %}false{% endif %},
 {%- if feature in ["lldp"] %}
             "has_per_asic_scope": {% raw %}"{% if not DEVICE_RUNTIME_METADATA['ETHERNET_PORTS_PRESENT'] or ('CHASSIS_METADATA' in DEVICE_RUNTIME_METADATA and DEVICE_RUNTIME_METADATA['CHASSIS_METADATA']['module_type'] in ['supervisor']) %}False{% else %}True{% endif %}"{% endraw %},

files/build_templates/snmp.service.j2

@@ -2,7 +2,7 @@
 Description=SNMP container
 Requires=updategraph.service
 Requisite=swss.service
-After=updategraph.service swss.service syncd.service
+After=updategraph.service swss.service syncd.service interfaces-config.service
 BindsTo=sonic.target
 After=sonic.target
 Before=ntp-config.service

files/build_templates/sonic_debian_extension.j2

@@ -852,19 +852,6 @@ if [ -f {{service}} ]; then
     echo "{{service}}" | sudo tee -a $GENERATED_SERVICE_FILE
 fi
 {% endfor %}
-{% for timer in installer_timers.split(' ') -%}
-if [ -f {{timer}} ]; then
-    sudo cp {{timer}} $FILESYSTEM_ROOT_USR_LIB_SYSTEMD_SYSTEM
-
-    {% if "@" in timer %}
-    MULTI_INSTANCE="{{timer}}"
-    SINGLE_INSTANCE=${MULTI_INSTANCE/"@"}
-    sudo cp $SINGLE_INSTANCE $FILESYSTEM_ROOT_USR_LIB_SYSTEMD_SYSTEM
-    {% endif %}
-
-    echo "{{timer}}" | sudo tee -a $GENERATED_SERVICE_FILE
-fi
-{% endfor %}
 if [ -f iccpd.service ]; then
     sudo LANG=C chroot $FILESYSTEM_ROOT systemctl disable iccpd.service
 fi
@@ -898,30 +885,9 @@ sudo LANG=C cp $SCRIPTS_DIR/write_standby.py $FILESYSTEM_ROOT/usr/local/bin/writ
 # Copy mark_dhcp_packet script
 sudo LANG=C cp $SCRIPTS_DIR/mark_dhcp_packet.py $FILESYSTEM_ROOT/usr/local/bin/mark_dhcp_packet.py
 
-# Copy systemd timer configuration
-# It implements delayed start of services
-sudo cp $BUILD_TEMPLATES/snmp.timer $FILESYSTEM_ROOT_USR_LIB_SYSTEMD_SYSTEM
-echo "snmp.timer" | sudo tee -a $GENERATED_SERVICE_FILE
-
-{% if include_system_telemetry == 'y' %}
-sudo cp $BUILD_TEMPLATES/telemetry.timer $FILESYSTEM_ROOT_USR_LIB_SYSTEMD_SYSTEM
-echo "telemetry.timer" | sudo tee -a $GENERATED_SERVICE_FILE
-{% endif %}
-
-{% if include_mgmt_framework == 'y' %}
-sudo cp $BUILD_TEMPLATES/mgmt-framework.timer $FILESYSTEM_ROOT_USR_LIB_SYSTEMD_SYSTEM
-echo "mgmt-framework.timer" | sudo tee -a $GENERATED_SERVICE_FILE
-{% endif %}
-
-sudo cp $BUILD_TEMPLATES/pmon.timer $FILESYSTEM_ROOT_USR_LIB_SYSTEMD_SYSTEM
-echo "pmon.timer" | sudo tee -a $GENERATED_SERVICE_FILE
-
 sudo cp $BUILD_TEMPLATES/sonic.target $FILESYSTEM_ROOT_USR_LIB_SYSTEMD_SYSTEM
 sudo LANG=C chroot $FILESYSTEM_ROOT systemctl enable sonic.target
 
-sudo cp $BUILD_TEMPLATES/sonic-delayed.target $FILESYSTEM_ROOT_USR_LIB_SYSTEMD_SYSTEM
-sudo LANG=C chroot $FILESYSTEM_ROOT systemctl enable sonic-delayed.target
-
 sudo LANG=C DEBIAN_FRONTEND=noninteractive chroot $FILESYSTEM_ROOT apt-get purge -y python3-dev
 sudo LANG=C DEBIAN_FRONTEND=noninteractive chroot $FILESYSTEM_ROOT apt-get purge -y build-essential libssl-dev swig
 sudo LANG=C DEBIAN_FRONTEND=noninteractive chroot $FILESYSTEM_ROOT apt-get purge -y libcairo2-dev libdbus-1-dev libgirepository1.0-dev libsystemd-dev pkg-config

files/scripts/swss.sh

@@ -275,6 +275,8 @@ stop() {
     if [[ x"$WARM_BOOT" != x"true" ]] && [[ x"$FAST_BOOT" != x"true" ]]; then
         /usr/bin/${SERVICE}.sh stop $DEV
         debug "Stopped ${SERVICE}$DEV service..."
+        $SONIC_DB_CLI APPL_DB DEL PORT_TABLE:PortInitDone
+        debug "Cleared PortInitDone from APPL_DB..."
     else
         debug "Killing Docker swss..."
         /usr/bin/docker kill swss &> /dev/null || debug "Docker swss is not running ($?) ..."

slave.mk

@@ -1343,14 +1343,6 @@ $(addprefix $(TARGET_PATH)/, $(SONIC_INSTALLERS)) : $(TARGET_PATH)/% : \
 				$(eval $(docker:-dbg.gz=.gz)_GLOBAL = yes)
 			)
 		fi
-		if [ -f files/build_templates/$($(docker:-dbg.gz=.gz)_CONTAINER_NAME).timer.j2 ]; then
-			j2 files/build_templates/$($(docker:-dbg.gz=.gz)_CONTAINER_NAME).timer.j2 > $($(docker:-dbg.gz=.gz)_CONTAINER_NAME).timer
-
-			# Set the flag GLOBAL_TIMER for all the global system-wide dockers timers.
-			$(if $(shell ls files/build_templates/$($(docker:-dbg.gz=.gz)_CONTAINER_NAME).timer.j2 2>/dev/null),\
-				$(eval $(docker:-dbg.gz=.gz)_GLOBAL_TIMER = yes)
-			)
-		fi
 		# Any service template, inside instance directory, will be used to generate .service and @.service file.
 		if [ -f files/build_templates/per_namespace/$($(docker:-dbg.gz=.gz)_CONTAINER_NAME).service.j2 ]; then
 			export multi_instance="true"
@@ -1361,16 +1353,6 @@ $(addprefix $(TARGET_PATH)/, $(SONIC_INSTALLERS)) : $(TARGET_PATH)/% : \
 			export multi_instance="false"
 			j2 files/build_templates/per_namespace/$($(docker:-dbg.gz=.gz)_CONTAINER_NAME).service.j2 > $($(docker:-dbg.gz=.gz)_CONTAINER_NAME).service
 		fi
-		# Any timer template, inside instance directory, will be used to generate .timer and @.timer file.
-		if [ -f files/build_templates/per_namespace/$($(docker:-dbg.gz=.gz)_CONTAINER_NAME).timer.j2 ]; then
-			export multi_instance="true"
-			j2 files/build_templates/per_namespace/$($(docker:-dbg.gz=.gz)_CONTAINER_NAME).timer.j2 > $($(docker:-dbg.gz=.gz)_CONTAINER_NAME)@.timer
-			$(if $(shell ls files/build_templates/per_namespace/$($(docker:-dbg.gz=.gz)_CONTAINER_NAME).timer.j2 2>/dev/null),\
-				$(eval $(docker:-dbg.gz=.gz)_TEMPLATE_TIMER = yes)
-			)
-			export multi_instance="false"
-			j2 files/build_templates/per_namespace/$($(docker:-dbg.gz=.gz)_CONTAINER_NAME).timer.j2 > $($(docker:-dbg.gz=.gz)_CONTAINER_NAME).timer
-		fi
 		# Any service template, inside share_image directory, will be used to generate -chassis.service file.
 		# TODO: need better way to name the image-shared service
 		if [ -f files/build_templates/share_image/$($(docker:-dbg.gz=.gz)_CONTAINER_NAME).service.j2 ]; then
@@ -1407,20 +1389,7 @@ $(addprefix $(TARGET_PATH)/, $(SONIC_INSTALLERS)) : $(TARGET_PATH)/% : \
 			$(eval SERVICES += "$(addsuffix -chassis.service, $($(docker:-dbg.gz=.gz)_CONTAINER_NAME))")
 		)
 	)
-	# Marks template timers with an "@" according to systemd convention
-	# If the $($docker)_TEMPLATE_TIMER) variable is set, the timer will be treated as a template
-	# If the $($docker)_GLOBAL_TIMER) and $($docker)_TEMPLATE_TIMER) variables are set the timer will be added both as a global and template timer.
-	$(foreach docker, $($*_DOCKERS),\
-		$(if $($(docker:-dbg.gz=.gz)_TEMPLATE_TIMER),\
-			$(if $($(docker:-dbg.gz=.gz)_GLOBAL_TIMER),\
-				$(eval TIMERS += "$(addsuffix .timer, $($(docker:-dbg.gz=.gz)_CONTAINER_NAME))")\
-			)\
-			$(eval TIMERS += "$(addsuffix @.timer, $($(docker:-dbg.gz=.gz)_CONTAINER_NAME))"),\
-			$(eval TIMERS += "$(addsuffix .timer, $($(docker:-dbg.gz=.gz)_CONTAINER_NAME))")
-		)
-	)
 	export installer_services="$(SERVICES)"
-	export installer_timers="$(TIMERS)"
 
 	export installer_extra_files="$(foreach docker, $($*_DOCKERS), $(foreach file, $($(docker:-dbg.gz=.gz)_BASE_IMAGE_FILES), $($(docker:-dbg.gz=.gz)_PATH)/base_image_files/$(file)))"
 

src/sonic-yang-models/tests/files/sample_config_db.json

@@ -1735,7 +1735,7 @@
                 "auto_restart": "enabled",
                 "has_global_scope": "False",
                 "has_per_asic_scope": "True",
-                "has_timer": "False",
+                "delayed": "False",
                 "high_mem_alert": "disabled",
                 "state": "enabled",
                 "set_owner": "local",
@@ -1746,7 +1746,7 @@
                 "auto_restart": "always_enabled",
                 "has_global_scope": "true",
                 "has_per_asic_scope": "true",
-                "has_timer": "false",
+                "delayed": "false",
                 "high_mem_alert": "disabled",
                 "state": "always_enabled",
                 "set_owner": "local",
@@ -1757,7 +1757,7 @@
                 "auto_restart": "enabled",
                 "has_global_scope": "true",
                 "has_per_asic_scope": "false",
-                "has_timer": "true",
+                "delayed": "true",
                 "high_mem_alert": "disabled",
                 "state": "enabled",
                 "set_owner": "kube",
@@ -1768,7 +1768,7 @@
                 "auto_restart": "enabled",
                 "has_global_scope": "false",
                 "has_per_asic_scope": "true",
-                "has_timer": "false",
+                "delayed": "false",
                 "high_mem_alert": "disabled",
                 "state": "enabled",
                 "set_owner": "local",
@@ -1779,7 +1779,7 @@
                 "auto_restart": "enabled",
                 "has_global_scope": "false",
                 "has_per_asic_scope": "true",
-                "has_timer": "false",
+                "delayed": "false",
                 "high_mem_alert": "disabled",
                 "state": "enabled",
                 "set_owner": "local",
@@ -1790,7 +1790,7 @@
                 "auto_restart": "enabled",
                 "has_global_scope": "false",
                 "has_per_asic_scope": "{% if not DEVICE_RUNTIME_METADATA['ETHERNET_PORTS_PRESENT'] or ('CHASSIS_METADATA' in DEVICE_RUNTIME_METADATA and DEVICE_RUNTIME_METADATA['CHASSIS_METADATA']['module_type'] in ['supervisor']) %}False{% else %}True{% endif %}",
-                "has_timer": "false",
+                "delayed": "false",
                 "high_mem_alert": "disabled",
                 "state": "enabled",
                 "set_owner": "kube",
@@ -1801,7 +1801,7 @@
                 "auto_restart": "enabled",
                 "has_global_scope": "false",
                 "has_per_asic_scope": "true",
-                "has_timer": "false",
+                "delayed": "false",
                 "high_mem_alert": "disabled",
                 "state": "{% if not (DEVICE_METADATA is defined and DEVICE_METADATA['localhost'] is defined and DEVICE_METADATA['localhost']['type'] is defined and DEVICE_METADATA['localhost']['type'] != 'ToRRouter') %}enabled{% else %}disabled{% endif %}",
                 "set_owner": "kube",

src/sonic-yang-models/tests/yang_model_tests/tests_config/feature.json

@@ -7,7 +7,7 @@
                         "name": "database",
                         "state": "always_enabled",
                         "auto_restart": "always_enabled",
-                        "has_timer": "False",
+                        "delayed": "False",
                         "has_global_scope": "True",
                         "has_per_asic_scope": "True",
                         "set_owner": "local",
@@ -18,7 +18,7 @@
                         "name": "swss",
                         "state": "always_enabled",
                         "auto_restart": "always_enabled",
-                        "has_timer": "false",
+                        "delayed": "false",
                         "has_global_scope": "false",
                         "has_per_asic_scope": "true",
                         "set_owner": "local",
@@ -29,7 +29,7 @@
                         "name": "syncd",
                         "state": "always_enabled",
                         "auto_restart": "always_enabled",
-                        "has_timer": "false",
+                        "delayed": "false",
                         "has_global_scope": "false",
                         "has_per_asic_scope": "true",
                         "set_owner": "local",
@@ -40,7 +40,7 @@
                         "name": "snmp",
                         "state": "enabled",
                         "auto_restart": "enabled",
-                        "has_timer": "false",
+                        "delayed": "false",
                         "has_global_scope": "true",
                         "has_per_asic_scope": "false",
                         "set_owner": "kube",
@@ -51,7 +51,7 @@
                         "name": "lldp",
                         "state": "disabled",
                         "auto_restart": "disabled",
-                        "has_timer": "false",
+                        "delayed": "false",
                         "has_global_scope": "false",
                         "has_per_asic_scope": "{% if not DEVICE_RUNTIME_METADATA['ETHERNET_PORTS_PRESENT'] or ('CHASSIS_METADATA' in DEVICE_RUNTIME_METADATA and DEVICE_RUNTIME_METADATA['CHASSIS_METADATA']['module_type'] in ['supervisor']) %}False{% else %}True{% endif %}",
                         "set_owner": "kube",
@@ -62,7 +62,7 @@
                         "name": "dhcp_relay",
                         "state": "{% if not (DEVICE_METADATA is defined and DEVICE_METADATA['localhost'] is defined and DEVICE_METADATA['localhost']['type'] is defined and DEVICE_METADATA['localhost']['type'] != 'ToRRouter') %}enabled{% else %}disabled{% endif %}",
                         "auto_restart": "disabled",
-                        "has_timer": "false",
+                        "delayed": "false",
                         "has_global_scope": "false",
                         "has_per_asic_scope": "true",
                         "set_owner": "kube",
@@ -81,7 +81,7 @@
                         "name": "lldp",
                         "state": "disabled",
                         "auto_restart": "disabled",
-                        "has_timer": "false",
+                        "delayed": "false",
                         "has_global_scope": "false",
                         "has_per_asic_scope": "{% if not DEVICE_RUNTIME_METADATA['ETHERNET_PORTS_PRESENT'] or ('CHASSIS_METADATA' in DEVICE_RUNTIME_METADATA and DEVICE_RUNTIME_METADATA['CHASSIS_METADATA']['module_type'] in ['supervisor']) %}False{% else %}True{% endif %}",
                         "set_owner": "invalid",
@@ -100,7 +100,7 @@
                         "name": "lldp",
                         "state": "disabled",
                         "auto_restart": "disabled",
-                        "has_timer": "false",
+                        "delayed": "false",
                         "has_global_scope": "false",
                         "has_per_asic_scope": "{% if not DEVICE_RUNTIME_METADATA['ETHERNET_PORTS_PRESENT'] or ('CHASSIS_METADATA' in DEVICE_RUNTIME_METADATA and DEVICE_RUNTIME_METADATA['CHASSIS_METADATA']['module_type'] in ['supervisor']) %}False{% else %}True{% endif %}",
                         "check_up_status": "false",
@@ -119,7 +119,7 @@
                         "name": "database",
                         "state": "always_enabled",
                         "auto_restart": "always_enabled",
-                        "has_timer": "FALSE",
+                        "delayed": "FALSE",
                         "has_global_scope": "TRUE",
                         "has_per_asic_scope": "TRUE",
                         "check_up_status": "FALSE",

src/sonic-yang-models/yang-models/sonic-feature.yang

@@ -57,9 +57,9 @@ module sonic-feature{
                     default "enabled";
                 }
 
-                leaf has_timer {
-                    description "This configuration identicates if there is
-                                timer associated to this feature";
+                leaf delayed {
+                    description "This configuration identicates if the feature needs to be delayed until
+                                 system initialization";
                     type stypes:boolean_type;
                     default "false";
                 }