[NETVIRT-1176] IPv6 behavior inconsistent while using 3 Node Neutron HA Created: 26/Mar/18  Updated: 16/May/18  Resolved: 16/May/18

Status: Resolved
Project: netvirt
Component/s: General
Affects Version/s: None
Fix Version/s: Oxygen

Type: Bug Priority: Medium
Reporter: balakrishnan k Assignee: Unassigned
Resolution: Cannot Reproduce Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified


 Description   

When HA Proxy load balances neutron requests as well as ODL requests

-------             --------             --------              -------  
 HA     ----->  ODL    ------>  ODL   --------> ODL   
           <-----    N                    N                     N     
--------            --------             --------              --------                                N- neutron

 

in the above environment.

VM's not getting IP(IPV6) while creating VM instance multiple times.

 Comments   
Comment by yogalakshmi swetha [ 28/Mar/18 ]

We tested using the above topology and found a lot of inconsistent behavior

The issues we faced are :

  1. Ip is not assigned many a time when we create 3-4 instances
  2. Instance related flow entries are  missed, specially the security group flow entries. Due to this vm login fails,although vm has got Ip
  3. The co-existence of ipv4 and ipv6 vm's seems to have issues. When we created ipv4 vm's after creating 4-5 ipv6 vm's the ipv4 vm doesn't get it's Ip
Comment by Vinh Nguyen [ 16/May/18 ]

The issues are not reproducible with the same topology, using oxygen/master branch. The VMs are created successfully as long as compute resource are available. 

I am able to created > 10 VMs (IPv6/IPv4) on a openstack node with 16G RAM. All VMS are allocated with IP addresses properly.

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