[GitHub] ustcweizhou commented on issue #3179: Redundant VRouter guest network on wrong interface

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ustcweizhou commented on issue #3179: Redundant VRouter guest network on wrong interface
URL: https://github.com/apache/cloudstack/issues/3179#issuecomment-468691499
 
 
   @DennisKonrad 
   when apply a new configuration in VR, it will create a file in VR and execute the update in VR.
   see code in ./core/src/com/cloud/agent/resource/virtualnetwork/VirtualRoutingResource.java below
   ```
       private ExecutionResult applyConfigToVR(String routerAccessIp, ConfigItem c, Duration timeout) {
           if (c instanceof FileConfigItem) {
               FileConfigItem configItem = (FileConfigItem)c;
               return _vrDeployer.createFileInVR(routerAccessIp, configItem.getFilePath(), configItem.getFileName(), configItem.getFileContents());
           } else if (c instanceof ScriptConfigItem) {
               ScriptConfigItem configItem = (ScriptConfigItem)c;
               return _vrDeployer.executeInVR(routerAccessIp, configItem.getScript(), configItem.getArgs(), timeout);
           }
           throw new CloudRuntimeException("Unable to apply unknown configitem of type " + c.getClass().getSimpleName());
       }
   ```
   
   json files will be created in server, then scp to VR through 169.254.X.X/port 3922 on VR.
   then execute /opt/cloud/bin/update_config.py in VR
   json file will be processed in following part
   ```
   def process_file():
       logging.info("Processing JSON file %s" % sys.argv[1])
       qf = QueueFile()
       qf.setFile(sys.argv[1])
       qf.load(None)
   ```
   QueueFile is defined in /opt/cloud/bin/merge.py
   ips.json will be updated if json file contains new ip.
   

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