Add debug docker for SNMP. (sonic-net#3467)

rules/docker-snmp-sv2.mk

@@ -1,14 +1,27 @@
 # docker image for snmp agent
 
-DOCKER_SNMP_SV2 = docker-snmp-sv2.gz
+DOCKER_SNMP_SV2_STEM = docker-snmp-sv2
+DOCKER_SNMP_SV2 = $(DOCKER_SNMP_SV2_STEM).gz
+DOCKER_SNMP_SV2_DBG = $(DOCKER_SNMP_SV2_STEM)-$(DBG_IMAGE_MARK).gz
+
 $(DOCKER_SNMP_SV2)_PATH = $(DOCKERS_PATH)/docker-snmp-sv2
 ## TODO: remove LIBPY3_DEV if we can get pip3 directly
 $(DOCKER_SNMP_SV2)_DEPENDS += $(SNMP) $(SNMPD) $(PY3) $(LIBPY3_DEV)
+
+$(DOCKER_SNMP_SV2)_DBG_DEPENDS = $($(DOCKER_CONFIG_ENGINE)_DBG_DEPENDS)
+$(DOCKER_SNMP_SV2)_DBG_DEPENDS += $(LIBSNMP_DBG)
+
+$(DOCKER_SNMP_SV2)_DBG_IMAGE_PACKAGES = $($(DOCKER_CONFIG_ENGINE)_DBG_IMAGE_PACKAGES)
+
 $(DOCKER_SNMP_SV2)_PYTHON_WHEELS += $(SONIC_PLATFORM_COMMON_PY3) $(SWSSSDK_PY3) $(ASYNCSNMP_PY3)
 $(DOCKER_SNMP_SV2)_LOAD_DOCKERS += $(DOCKER_CONFIG_ENGINE)
+
 SONIC_DOCKER_IMAGES += $(DOCKER_SNMP_SV2)
 SONIC_INSTALL_DOCKER_IMAGES += $(DOCKER_SNMP_SV2)
 
+SONIC_DOCKER_DBG_IMAGES += $(DOCKER_SNMP_SV2_DBG)
+SONIC_INSTALL_DOCKER_DBG_IMAGES += $(DOCKER_SNMP_SV2_DBG)
+
 $(DOCKER_SNMP_SV2)_CONTAINER_NAME = snmp
 $(DOCKER_SNMP_SV2)_RUN_OPT += --net=host --privileged -t
 $(DOCKER_SNMP_SV2)_RUN_OPT += -v /etc/sonic:/etc/sonic:ro