[gearbox] support gearbox feature on docker-sonic-vs (#8765)

Author: jimmyzhai

device/virtual/x86_64-kvm_x86_64-r0/brcm_gearbox_vs/context_config.json

@@ -7,6 +7,9 @@
             "dbCounters" : "COUNTERS_DB",
             "dbFlex": "FLEX_COUNTER_DB",
             "dbState" : "STATE_DB",
+            "zmq_enable": false,
+            "zmq_endpoint": "tcp://127.0.0.1:5555",
+            "zmq_ntf_endpoint": "tcp://127.0.0.1:5556",
             "switches": [
                 {
                     "index" : 0,
@@ -21,10 +24,13 @@
             "dbCounters" : "GB_COUNTERS_DB",
             "dbFlex": "GB_FLEX_COUNTER_DB",
             "dbState" : "STATE_DB",
+            "zmq_enable": false,
+            "zmq_endpoint": "tcp://127.0.0.1:5565",
+            "zmq_ntf_endpoint": "tcp://127.0.0.1:5566",
             "switches": [
                 {
                     "index" : 1,
-                    "hwinfo" : ""
+                    "hwinfo": "mdio0_0_0/0"
                 }
             ]
         }

platform/vs/docker-sonic-vs/Dockerfile.j2

@@ -175,6 +175,7 @@ COPY ["buffermgrd.sh", "/usr/bin/"]
 
 COPY ["platform.json", "/usr/share/sonic/device/x86_64-kvm_x86_64-r0/"]
 COPY ["hwsku.json", "/usr/share/sonic/device/x86_64-kvm_x86_64-r0/Force10-S6000/"]
+COPY ["hwsku.json", "/usr/share/sonic/device/x86_64-kvm_x86_64-r0/brcm_gearbox_vs/"]
 
 # Workaround the tcpdump issue
 RUN mv /usr/sbin/tcpdump /usr/bin/tcpdump

platform/vs/docker-sonic-vs/start.sh

@@ -109,6 +109,11 @@ fi
 
 /usr/bin/configdb-load.sh
 
+if [ "$HWSKU" = "brcm_gearbox_vs" ]; then
+    supervisorctl start gbsyncd
+    supervisorctl start gearsyncd
+fi
+
 supervisorctl start syncd
 
 supervisorctl start portsyncd

platform/vs/docker-sonic-vs/supervisord.conf

@@ -43,6 +43,23 @@ autorestart=false
 stdout_logfile=syslog
 stderr_logfile=syslog
 
+[program:gbsyncd]
+command=/usr/bin/syncd -s -p /usr/share/sonic/hwsku/pai.profile -x /usr/share/sonic/hwsku/context_config.json -g 1
+priority=4
+autostart=false
+autorestart=false
+stdout_logfile=syslog
+stderr_logfile=syslog
+
+[program:gearsyncd]
+command=/usr/bin/gearsyncd -p /usr/share/sonic/hwsku/gearbox_config.json
+startsecs=0
+priority=5
+autostart=false
+autorestart=false
+stdout_logfile=syslog
+stderr_logfile=syslog
+
 [program:portsyncd]
 command=/usr/bin/portsyncd
 priority=5