[docker-syncd]: Restart SwSS, syncd and dependent services if a criti…

…cal process in syncd container exits unexpectedly (sonic-net#3534) Add the same mechanism I developed for the SwSS service in sonic-net#2845 to the syncd service. However, in order to cause the SwSS service to also exit and restart in this situation, I developed a docker-wait-any program which the SwSS service uses to wait for either the swss or syncd containers to exit.
zhenggen-xu · zhenggen-xu · Nov 6, 2019 · Nov 6, 2019 · Nov 6, 2019 · Nov 6, 2019
commit 85b0de3df1125ad291afe0c7c93628dd45f226db
diff --git a/files/build_templates/sonic_debian_extension.j2 b/files/build_templates/sonic_debian_extension.j2
@@ -218,6 +218,9 @@ sudo cp $IMAGE_CONFIGS/hostname/hostname-config.service  $FILESYSTEM_ROOT/etc/sy
 echo "hostname-config.service" | sudo tee -a $GENERATED_SERVICE_FILE
 sudo cp $IMAGE_CONFIGS/hostname/hostname-config.sh $FILESYSTEM_ROOT/usr/bin/
 
+# Copy miscellaneous scripts
+sudo cp $IMAGE_CONFIGS/misc/docker-wait-any $FILESYSTEM_ROOT/usr/bin/
+
 # Copy updategraph script and service file
 j2 files/build_templates/updategraph.service.j2 | sudo tee $FILESYSTEM_ROOT/etc/systemd/system/updategraph.service
 sudo cp $IMAGE_CONFIGS/updategraph/updategraph $FILESYSTEM_ROOT/usr/bin/

diff --git a/files/image_config/misc/docker-wait-any b/files/image_config/misc/docker-wait-any
@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+
+"""
+    docker-wait-any
+    This script takes one or more Docker container names as arguments,
+    and it will block indefinitely while all of the specified containers
+    are running. If any of the specified containers stop, the script will
+    exit.
+    This script was created because the 'docker wait' command is lacking
+    this functionality. It will block until ALL specified containers have
+    stopped running. Here, we spawn multiple threads and wait on one
+    container per thread. If any of the threads exit, the entire
+    application will exit.
+    NOTE: This script is written against docker-py version 1.6.0. Newer
+    versions of docker-py have a different API.
+"""
+
+import sys
+import threading
+from docker import Client
+
+# Instantiate a global event to share among our threads
+g_thread_exit_event = threading.Event()
+
+
+def usage():
+    print("Usage: {} <container_name> [<container_name> ...]".format(sys.argv[0]))
+    sys.exit(1)
+
+
+def wait_for_container(docker_client, container_name):
+    docker_client.wait(container_name)
+
+    print("No longer waiting on container '{}'".format(container_name))
+
+    # Signal the main thread to exit
+    g_thread_exit_event.set()
+
+
+def main():
+    thread_list = []
+
+    docker_client = Client(base_url='unix://var/run/docker.sock')
+
+    # Ensure we were passed at least one argument
+    if len(sys.argv) < 2:
+        usage()
+
+    container_names = sys.argv[1:]
+
+    for container_name in container_names:
+        t = threading.Thread(target=wait_for_container, args=[docker_client, container_name])
+        t.daemon = True
+        t.start()
+        thread_list.append(t)
+
+    # Wait until we receive an event signifying one of the containers has stopped
+    g_thread_exit_event.wait()
+    sys.exit(0)
+
+if __name__ == '__main__':
+    main()
diff --git a/files/scripts/swss.sh b/files/scripts/swss.sh
@@ -131,7 +131,22 @@ start() {
 
 wait() {
     start_peer_and_dependent_services
-    /usr/bin/${SERVICE}.sh wait
+
+    # Allow some time for peer container to start
+    # NOTE: This assumes Docker containers share the same names as their
+    # corresponding services
+    for SECS in {1..60}; do
+        RUNNING=$(docker inspect -f '{{.State.Running}}' ${PEER})
+        if [[ x"$RUNNING" == x"true" ]]; then
+            break
+        else
+            sleep 1
+        fi
+    done
+
+    # NOTE: This assumes Docker containers share the same names as their
+    # corresponding services
+    /usr/bin/docker-wait-any ${SERVICE} ${PEER}
 }
 
 stop() {

diff --git a/platform/barefoot/docker-syncd-bfn-rpc.mk b/platform/barefoot/docker-syncd-bfn-rpc.mk
@@ -3,6 +3,7 @@
 DOCKER_SYNCD_BFN_RPC = docker-syncd-bfn-rpc.gz
 $(DOCKER_SYNCD_BFN_RPC)_PATH = $(PLATFORM_PATH)/docker-syncd-bfn-rpc
 $(DOCKER_SYNCD_BFN_RPC)_DEPENDS += $(SYNCD_RPC) $(LIBTHRIFT)
+$(DOCKER_SYNCD_BFN_RPC)_FILES += $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)
 ifeq ($(INSTALL_DEBUG_TOOLS), y)
 $(DOCKER_SYNCD_BFN_RPC)_DEPENDS += $(SYNCD_RPC_DBG) \
                                    $(LIBSWSSCOMMON_DBG) \

diff --git a/platform/barefoot/docker-syncd-bfn/Dockerfile.j2 b/platform/barefoot/docker-syncd-bfn/Dockerfile.j2
@@ -29,6 +29,8 @@ debs/{{ deb }}{{' '}}
 
 COPY ["start.sh", "/usr/bin/"]
 COPY ["supervisord.conf", "/etc/supervisor/conf.d/"]
+COPY ["files/supervisor-proc-exit-listener", "/usr/bin"]
+COPY ["critical_processes", "/etc/supervisor/"]
 
 ## Clean up
 RUN apt-get clean -y; apt-get autoclean -y; apt-get autoremove -y

diff --git a/platform/barefoot/docker-syncd-bfn/critical_processes b/platform/barefoot/docker-syncd-bfn/critical_processes
@@ -0,0 +1 @@
+syncd
diff --git a/platform/broadcom/docker-syncd-brcm-rpc.mk b/platform/broadcom/docker-syncd-brcm-rpc.mk
@@ -9,7 +9,7 @@ $(DOCKER_SYNCD_BRCM_RPC)_DEPENDS += $(SYNCD_RPC_DBG) \
                                     $(LIBSAIMETADATA_DBG) \
                                     $(LIBSAIREDIS_DBG)
 endif
-$(DOCKER_SYNCD_BRCM_RPC)_FILES += $(DSSERVE) $(BCMCMD)
+$(DOCKER_SYNCD_BRCM_RPC)_FILES += $(DSSERVE) $(BCMCMD) $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)
 $(DOCKER_SYNCD_BRCM_RPC)_LOAD_DOCKERS += $(DOCKER_SYNCD_BASE)
 SONIC_DOCKER_IMAGES += $(DOCKER_SYNCD_BRCM_RPC)
 SONIC_STRETCH_DOCKERS += $(DOCKER_SYNCD_BRCM_RPC)

diff --git a/platform/broadcom/docker-syncd-brcm/Dockerfile.j2 b/platform/broadcom/docker-syncd-brcm/Dockerfile.j2
@@ -26,6 +26,8 @@ COPY ["files/dsserve", "files/bcmcmd", "start.sh", "bcmsh", "/usr/bin/"]
 RUN chmod +x /usr/bin/dsserve /usr/bin/bcmcmd
 
 COPY ["supervisord.conf", "/etc/supervisor/conf.d/"]
+COPY ["files/supervisor-proc-exit-listener", "/usr/bin"]
+COPY ["critical_processes", "/etc/supervisor/"]
 
 ## Clean up
 RUN apt-get clean -y; apt-get autoclean -y; apt-get autoremove -y

diff --git a/platform/broadcom/docker-syncd-brcm/critical_processes b/platform/broadcom/docker-syncd-brcm/critical_processes
@@ -0,0 +1,2 @@
+dsserve
+syncd
diff --git a/platform/broadcom/docker-syncd-brcm/supervisord.conf b/platform/broadcom/docker-syncd-brcm/supervisord.conf
@@ -3,6 +3,12 @@ logfile_maxbytes=1MB
 logfile_backups=2
 nodaemon=true
 
+[eventlistener:supervisor-proc-exit-listener]
+command=/usr/bin/supervisor-proc-exit-listener
+events=PROCESS_STATE_EXITED
+autostart=true
+autorestart=unexpected
+
 [program:start.sh]
 command=/usr/bin/start.sh
 priority=1
@@ -15,7 +21,7 @@ stderr_logfile=syslog
 command=/usr/sbin/rsyslogd -n
 priority=2
 autostart=false
-autorestart=false
+autorestart=unexpected
 stdout_logfile=syslog
 stderr_logfile=syslog
 

diff --git a/platform/cavium/docker-syncd-cavm-rpc.mk b/platform/cavium/docker-syncd-cavm-rpc.mk
@@ -3,6 +3,7 @@
 DOCKER_SYNCD_CAVM_RPC = docker-syncd-cavm-rpc.gz
 $(DOCKER_SYNCD_CAVM_RPC)_PATH = $(PLATFORM_PATH)/docker-syncd-cavm-rpc
 $(DOCKER_SYNCD_CAVM_RPC)_DEPENDS += $(SYNCD_RPC) $(LIBTHRIFT) $(CAVM_LIBSAI) $(XP_TOOLS) $(REDIS_TOOLS)
+$(DOCKER_SYNCD_CAVM_RPC)_FILES += $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)
 ifeq ($(INSTALL_DEBUG_TOOLS), y)
 $(DOCKER_SYNCD_CAVM_RPC)_DEPENDS += $(SYNCD_RPC_DBG) \
                                     $(LIBSWSSCOMMON_DBG) \

diff --git a/platform/cavium/docker-syncd-cavm.mk b/platform/cavium/docker-syncd-cavm.mk
@@ -3,6 +3,7 @@
 DOCKER_SYNCD_CAVM = docker-syncd-cavm.gz
 $(DOCKER_SYNCD_CAVM)_PATH = $(PLATFORM_PATH)/docker-syncd-cavm
 $(DOCKER_SYNCD_CAVM)_DEPENDS += $(SYNCD) $(CAVM_LIBSAI) $(XP_TOOLS) $(REDIS_TOOLS)
+$(DOCKER_SYNCD_CAVM)_FILES += $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)
 ifeq ($(INSTALL_DEBUG_TOOLS), y)
 $(DOCKER_SYNCD_CAVM)_DEPENDS += $(SYNCD_DBG) \
                                 $(LIBSWSSCOMMON_DBG) \

diff --git a/platform/cavium/docker-syncd-cavm/Dockerfile.j2 b/platform/cavium/docker-syncd-cavm/Dockerfile.j2
@@ -23,6 +23,8 @@ debs/{{ deb }}{{' '}}
 
 COPY ["start.sh", "/usr/bin/"]
 COPY ["supervisord.conf", "/etc/supervisor/conf.d/"]
+COPY ["files/supervisor-proc-exit-listener", "/usr/bin"]
+COPY ["critical_processes", "/etc/supervisor/"]
 
 COPY ["profile.ini", "/etc/ssw/AS7512/"]
 

diff --git a/platform/cavium/docker-syncd-cavm/critical_processes b/platform/cavium/docker-syncd-cavm/critical_processes
@@ -0,0 +1 @@
+syncd
diff --git a/platform/cavium/docker-syncd-cavm/supervisord.conf b/platform/cavium/docker-syncd-cavm/supervisord.conf
@@ -3,6 +3,12 @@ logfile_maxbytes=1MB
 logfile_backups=2
 nodaemon=true
 
+[eventlistener:supervisor-proc-exit-listener]
+command=/usr/bin/supervisor-proc-exit-listener
+events=PROCESS_STATE_EXITED
+autostart=true
+autorestart=unexpected
+
 [program:start.sh]
 command=/usr/bin/start.sh
 priority=1
@@ -15,7 +21,7 @@ stderr_logfile=syslog
 command=/usr/sbin/rsyslogd -n
 priority=2
 autostart=false
-autorestart=false
+autorestart=unexpected
 stdout_logfile=syslog
 stderr_logfile=syslog
 

diff --git a/platform/centec/docker-syncd-centec-rpc.mk b/platform/centec/docker-syncd-centec-rpc.mk
@@ -3,6 +3,7 @@
 DOCKER_SYNCD_CENTEC_RPC = docker-syncd-centec-rpc.gz
 $(DOCKER_SYNCD_CENTEC_RPC)_PATH = $(PLATFORM_PATH)/docker-syncd-centec-rpc
 $(DOCKER_SYNCD_CENTEC_RPC)_DEPENDS += $(SYNCD_RPC) $(LIBTHRIFT)
+$(DOCKER_SYNCD_CENTEC_RPC)_FILES += $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)
 ifeq ($(INSTALL_DEBUG_TOOLS), y)
 $(DOCKER_SYNCD_CENTEC_RPC)_DEPENDS += $(SYNCD_RPC_DBG) \
                                       $(LIBSWSSCOMMON_DBG) \

diff --git a/platform/centec/docker-syncd-centec.mk b/platform/centec/docker-syncd-centec.mk
@@ -3,6 +3,7 @@
 DOCKER_SYNCD_CENTEC = docker-syncd-centec.gz
 $(DOCKER_SYNCD_CENTEC)_PATH = $(PLATFORM_PATH)/docker-syncd-centec
 $(DOCKER_SYNCD_CENTEC)_DEPENDS += $(SYNCD)
+$(DOCKER_SYNCD_CENTEC)_FILES += $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)
 ifeq ($(INSTALL_DEBUG_TOOLS), y)
 $(DOCKER_SYNCD_CENTEC)_DEPENDS += $(SYNCD_DBG) \
                                   $(LIBSWSSCOMMON_DBG) \

diff --git a/platform/centec/docker-syncd-centec/Dockerfile.j2 b/platform/centec/docker-syncd-centec/Dockerfile.j2
@@ -24,6 +24,8 @@ RUN apt-get install -f kmod
 
 COPY ["start.sh", "/usr/bin/"]
 COPY ["supervisord.conf", "/etc/supervisor/conf.d/"]
+COPY ["files/supervisor-proc-exit-listener", "/usr/bin"]
+COPY ["critical_processes", "/etc/supervisor/"]
 
 ## Clean up
 RUN apt-get clean -y; apt-get autoclean -y; apt-get autoremove -y

diff --git a/platform/centec/docker-syncd-centec/critical_processes b/platform/centec/docker-syncd-centec/critical_processes
@@ -0,0 +1 @@
+syncd
diff --git a/platform/centec/docker-syncd-centec/supervisord.conf b/platform/centec/docker-syncd-centec/supervisord.conf
@@ -3,6 +3,12 @@ logfile_maxbytes=1MB
 logfile_backups=2
 nodaemon=true
 
+[eventlistener:supervisor-proc-exit-listener]
+command=/usr/bin/supervisor-proc-exit-listener
+events=PROCESS_STATE_EXITED
+autostart=true
+autorestart=unexpected
+
 [program:start.sh]
 command=/usr/bin/start.sh
 priority=1
@@ -15,7 +21,7 @@ stderr_logfile=syslog
 command=/usr/sbin/rsyslogd -n
 priority=2
 autostart=false
-autorestart=false
+autorestart=unexpected
 stdout_logfile=syslog
 stderr_logfile=syslog
 

diff --git a/platform/marvell-arm64/docker-syncd-mrvl-rpc.mk b/platform/marvell-arm64/docker-syncd-mrvl-rpc.mk
@@ -3,6 +3,7 @@
 DOCKER_SYNCD_MRVL_RPC = docker-syncd-mrvl-rpc.gz
 $(DOCKER_SYNCD_MRVL_RPC)_PATH = $(PLATFORM_PATH)/docker-syncd-mrvl-rpc
 $(DOCKER_SYNCD_MRVL_RPC)_DEPENDS += $(SYNCD_RPC) $(LIBTHRIFT)
+$(DOCKER_SYNCD_MRVL_RPC)_FILES += $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)
 ifeq ($(INSTALL_DEBUG_TOOLS), y)
 $(DOCKER_SYNCD_MRVL_RPC)_DEPENDS += $(SYNCD_RPC_DBG) \
                                     $(LIBSWSSCOMMON_DBG) \

diff --git a/platform/marvell-arm64/docker-syncd-mrvl/Dockerfile.j2 b/platform/marvell-arm64/docker-syncd-mrvl/Dockerfile.j2
@@ -28,6 +28,8 @@ debs/{{ deb }}{{' '}}
 
 COPY ["start.sh", "/usr/bin/"]
 COPY ["supervisord.conf", "/etc/supervisor/conf.d/"]
+COPY ["files/supervisor-proc-exit-listener", "/usr/bin"]
+COPY ["critical_processes", "/etc/supervisor/"]
 
 ## Clean up
 RUN apt-get clean -y; apt-get autoclean -y; apt-get autoremove -y

diff --git a/platform/marvell-arm64/docker-syncd-mrvl/critical_processes b/platform/marvell-arm64/docker-syncd-mrvl/critical_processes
@@ -0,0 +1 @@
+syncd
diff --git a/platform/marvell-armhf/docker-syncd-mrvl-rpc.mk b/platform/marvell-armhf/docker-syncd-mrvl-rpc.mk
@@ -3,6 +3,7 @@
 DOCKER_SYNCD_MRVL_RPC = docker-syncd-mrvl-rpc.gz
 $(DOCKER_SYNCD_MRVL_RPC)_PATH = $(PLATFORM_PATH)/docker-syncd-mrvl-rpc
 $(DOCKER_SYNCD_MRVL_RPC)_DEPENDS += $(SYNCD_RPC) $(LIBTHRIFT)
+$(DOCKER_SYNCD_MRVL_RPC)_FILES += $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)
 ifeq ($(INSTALL_DEBUG_TOOLS), y)
 $(DOCKER_SYNCD_MRVL_RPC)_DEPENDS += $(SYNCD_RPC_DBG) \
                                     $(LIBSWSSCOMMON_DBG) \

diff --git a/platform/marvell-armhf/docker-syncd-mrvl/Dockerfile.j2 b/platform/marvell-armhf/docker-syncd-mrvl/Dockerfile.j2
@@ -28,6 +28,8 @@ debs/{{ deb }}{{' '}}
 
 COPY ["start.sh", "/usr/bin/"]
 COPY ["supervisord.conf", "/etc/supervisor/conf.d/"]
+COPY ["files/supervisor-proc-exit-listener", "/usr/bin"]
+COPY ["critical_processes", "/etc/supervisor/"]
 
 ## Clean up
 RUN apt-get clean -y; apt-get autoclean -y; apt-get autoremove -y

diff --git a/platform/marvell-armhf/docker-syncd-mrvl/critical_processes b/platform/marvell-armhf/docker-syncd-mrvl/critical_processes
@@ -0,0 +1 @@
+syncd
diff --git a/platform/marvell/docker-syncd-mrvl-rpc.mk b/platform/marvell/docker-syncd-mrvl-rpc.mk
@@ -3,6 +3,7 @@
 DOCKER_SYNCD_MRVL_RPC = docker-syncd-mrvl-rpc.gz
 $(DOCKER_SYNCD_MRVL_RPC)_PATH = $(PLATFORM_PATH)/docker-syncd-mrvl-rpc
 $(DOCKER_SYNCD_MRVL_RPC)_DEPENDS += $(SYNCD_RPC) $(LIBTHRIFT)
+$(DOCKER_SYNCD_MRVL_RPC)_FILES += $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)
 ifeq ($(INSTALL_DEBUG_TOOLS), y)
 $(DOCKER_SYNCD_MRVL_RPC)_DEPENDS += $(SYNCD_RPC_DBG) \
                                     $(LIBSWSSCOMMON_DBG) \

diff --git a/platform/marvell/docker-syncd-mrvl/Dockerfile.j2 b/platform/marvell/docker-syncd-mrvl/Dockerfile.j2
@@ -23,6 +23,8 @@ debs/{{ deb }}{{' '}}
 
 COPY ["start.sh", "syncd.sh", "/usr/bin/"]
 COPY ["supervisord.conf", "/etc/supervisor/conf.d/"]
+COPY ["files/supervisor-proc-exit-listener", "/usr/bin"]
+COPY ["critical_processes", "/etc/supervisor/"]
 
 ## Clean up
 RUN apt-get clean -y; apt-get autoclean -y; apt-get autoremove -y

diff --git a/platform/marvell/docker-syncd-mrvl/critical_processes b/platform/marvell/docker-syncd-mrvl/critical_processes
@@ -0,0 +1 @@
+syncd
diff --git a/platform/marvell/docker-syncd-mrvl/supervisord.conf b/platform/marvell/docker-syncd-mrvl/supervisord.conf
@@ -3,6 +3,12 @@ logfile_maxbytes=1MB
 logfile_backups=2
 nodaemon=true
 
+[eventlistener:supervisor-proc-exit-listener]
+command=/usr/bin/supervisor-proc-exit-listener
+events=PROCESS_STATE_EXITED
+autostart=true
+autorestart=unexpected
+
 [program:start.sh]
 command=/usr/bin/start.sh
 priority=1
@@ -15,7 +21,7 @@ stderr_logfile=syslog
 command=/usr/sbin/rsyslogd -n
 priority=2
 autostart=false
-autorestart=false
+autorestart=unexpected
 stdout_logfile=syslog
 stderr_logfile=syslog
 

diff --git a/platform/mellanox/docker-syncd-mlnx-rpc.mk b/platform/mellanox/docker-syncd-mlnx-rpc.mk
@@ -3,6 +3,7 @@
 DOCKER_SYNCD_MLNX_RPC = docker-syncd-mlnx-rpc.gz
 $(DOCKER_SYNCD_MLNX_RPC)_PATH = $(PLATFORM_PATH)/docker-syncd-mlnx-rpc
 $(DOCKER_SYNCD_MLNX_RPC)_DEPENDS += $(SYNCD_RPC) $(LIBTHRIFT)
+$(DOCKER_SYNCD_MLNX_RPC)_FILES += $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)
 ifeq ($(INSTALL_DEBUG_TOOLS), y)
 $(DOCKER_SYNCD_MLNX_RPC)_DEPENDS += $(SYNCD_RPC_DBG) \
                                     $(LIBSWSSCOMMON_DBG) \

diff --git a/platform/mellanox/docker-syncd-mlnx/Dockerfile.j2 b/platform/mellanox/docker-syncd-mlnx/Dockerfile.j2
@@ -35,5 +35,7 @@ RUN apt-get clean -y && \
 
 COPY ["start.sh", "/usr/bin/"]
 COPY ["supervisord.conf", "/etc/supervisor/conf.d/"]
+COPY ["files/supervisor-proc-exit-listener", "/usr/bin"]
+COPY ["critical_processes", "/etc/supervisor/"]
 
 ENTRYPOINT ["/usr/bin/supervisord"]
diff --git a/platform/mellanox/docker-syncd-mlnx/critical_processes b/platform/mellanox/docker-syncd-mlnx/critical_processes
@@ -0,0 +1 @@
+syncd
diff --git a/platform/mellanox/docker-syncd-mlnx/supervisord.conf b/platform/mellanox/docker-syncd-mlnx/supervisord.conf
@@ -3,6 +3,12 @@ logfile_maxbytes=1MB
 logfile_backups=2
 nodaemon=true
 
+[eventlistener:supervisor-proc-exit-listener]
+command=/usr/bin/supervisor-proc-exit-listener
+events=PROCESS_STATE_EXITED
+autostart=true
+autorestart=unexpected
+
 [program:start.sh]
 command=/usr/bin/start.sh
 priority=1
@@ -15,7 +21,7 @@ stderr_logfile=syslog
 command=/usr/sbin/rsyslogd -n
 priority=2
 autostart=false
-autorestart=false
+autorestart=unexpected
 stdout_logfile=syslog
 stderr_logfile=syslog
 

diff --git a/platform/nephos/docker-syncd-nephos/Dockerfile.j2 b/platform/nephos/docker-syncd-nephos/Dockerfile.j2
@@ -36,6 +36,8 @@ COPY ["files/dsserve", "files/npx_diag", "start.sh", "/usr/bin/"]
 RUN chmod +x /usr/bin/npx_diag /usr/bin/dsserve
 
 COPY ["supervisord.conf", "/etc/supervisor/conf.d/"]
+COPY ["files/supervisor-proc-exit-listener", "/usr/bin"]
+COPY ["critical_processes", "/etc/supervisor/"]
 
 ## Clean up
 RUN apt-get clean -y; apt-get autoclean -y; apt-get autoremove -y

diff --git a/platform/nephos/docker-syncd-nephos/critical_processes b/platform/nephos/docker-syncd-nephos/critical_processes
@@ -0,0 +1,2 @@
+dsserve
+syncd
diff --git a/platform/nephos/docker-syncd-nephos/supervisord.conf b/platform/nephos/docker-syncd-nephos/supervisord.conf
@@ -3,6 +3,12 @@ logfile_maxbytes=1MB
 logfile_backups=2
 nodaemon=true
 
+[eventlistener:supervisor-proc-exit-listener]
+command=/usr/bin/supervisor-proc-exit-listener
+events=PROCESS_STATE_EXITED
+autostart=true
+autorestart=unexpected
+
 [program:start.sh]
 command=/usr/bin/start.sh
 priority=1
@@ -15,7 +21,7 @@ stderr_logfile=syslog
 command=/usr/sbin/rsyslogd -n
 priority=2
 autostart=false
-autorestart=false
+autorestart=unexpected
 stdout_logfile=syslog
 stderr_logfile=syslog
 

diff --git a/platform/template/docker-syncd-base.mk b/platform/template/docker-syncd-base.mk
@@ -7,6 +7,8 @@ DOCKER_SYNCD_BASE_DBG = $(DOCKER_SYNCD_BASE_STEM)-$(DBG_IMAGE_MARK).gz
 
 $(DOCKER_SYNCD_BASE)_PATH = $(PLATFORM_PATH)/docker-syncd-$(DOCKER_SYNCD_PLATFORM_CODE)
 
+$(DOCKER_SYNCD_BASE)_FILES += $(SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT)
+
 $(DOCKER_SYNCD_BASE)_LOAD_DOCKERS += $(DOCKER_CONFIG_ENGINE_STRETCH)
 
 $(DOCKER_SYNCD_BASE)_DBG_DEPENDS += $($(DOCKER_CONFIG_ENGINE_STRETCH)_DBG_DEPENDS)