[GitHub] [cloudstack] ustcweizhou opened a new pull request #3477: RvR: Set up metadata/password/dhcp server on gateway IP instead of guest IP in RVR

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ustcweizhou opened a new pull request #3477: RvR: Set up metadata/password/dhcp server on gateway IP instead of guest IP in RVR
URL: https://github.com/apache/cloudstack/pull/3477
 
 
   ## Description
   
   When we create a vm in the network with redundant VRs, the lease file in the vm (for example /var/lib/dhcp/dhclient.eth0.leases) shows the dhcp-server-identifier is the guest ip (not vip/gateway) of master VR. That's the ip ipaddress where the vm fetch password and metadata from.
   if we stop the master VR (then backup will be master) or restart the network with cleanup (VRs will be created), the guest ip of master VR changes so vm are not able to get metadata/ssh-key using the ips in dhcp lease file.
   
   Setting up metadata/password/dhcp server on gateway instead of guest IP in redundant VRs will fix the issues.
   
   FIxes: #3409 
   
   ## Types of changes
   <!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
   - [ ] Breaking change (fix or feature that would cause existing functionality to change)
   - [ ] New feature (non-breaking change which adds functionality)
   - [X] Bug fix (non-breaking change which fixes an issue)
   - [ ] Enhancement (improves an existing feature and functionality)
   - [ ] Cleanup (Code refactoring and cleanup, that may add test cases)
   
   ## Screenshots (if appropriate):
   
   ## How Has This Been Tested?
   <!-- Please describe in detail how you tested your changes. -->
   <!-- Include details of your testing environment, and the tests you ran to -->
   <!-- see how your change affects other areas of the code, etc. -->
   
   
   <!-- Please read the [CONTRIBUTING](https://github.com/apache/cloudstack/blob/master/CONTRIBUTING.md) document -->
   

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