Fail the setup if we can't connect to VPP; exit the daemon with non-zero value to force restart by systemd

agentx/agent.py

@@ -38,7 +38,9 @@ class Agent(object):
 
     def run(self):
         self.logger.info('Calling setup')
-        self.setup()
+        if not self.setup():
+            self.logger.error('Setup failed - exiting')
+            return
 
         self.logger.info('Initial update')
         self._update()

vpp-snmp-agent.py

@@ -238,5 +238,7 @@ def main():
     except KeyboardInterrupt:
         a.stop()
 
+    sys.exit(-1)
+
 if __name__ == "__main__":
     main()