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[Zhixin Li <lizhixin@xxxxxxxxxxx>]

Public bug reported:

I have a mitaka enviroment with one controller host, one network host
and two computer hosts. All the l3 agents of my computer hosts and
network host are configed as dvr_snat mode. I created a dvr+ha router
and boot a vm with one of subnet associated with this router. This vm
accesses the internet normally before or after associating a floating ip
with it. But when I disassociated the floating ip, the vm can not access
the internet any more.

Pre-conditions:
  run L3 agent with dvr_snat mode on network nodes and compute nodes

How to reprocude:
  create a dvr+ha router
  create a subnet and associate this subnet with the router
  create a vm with the subnet
  associate a floating ip with the vm and then disassociate it
  the vm can not access internet

Analysis:
  I found that the ip rule "36709: from 10.10.30.4 lookup 16"(this ip is the vm's fixed ip) is still in the router's qrouter namespace on the compute host, although I diassociated the floating ip. Then I debug the code and found dvr_edge_ha_router can not execute code into remove_floating_ip function.

** Affects: neutron
     Importance: Undecided
     Assignee: Zhixin Li (lizhixin)
         Status: New


** Tags: l3-dvr-backlog l3-ha

** Changed in: neutron
     Assignee: (unassigned) => Zhixin Li (lizhixin)

** Description changed:

  I have a mitaka enviroment with one controller host, one network host
  and two computer hosts. All the l3 agents of my computer hosts and
  network host are configed as dvr_snat mode. I created a dvr+ha router
  and boot a vm with one of subnet associated with this router. This vm
  accesses the internet normally before or after associating a floating ip
  with it. But when I disassociated the floating ip, the vm can not access
  the internet any more.
  
- 
  Pre-conditions:
-     run L3 agent with dvr_snat mode on network nodes and compute nodes
+   run L3 agent with dvr_snat mode on network nodes and compute nodes
  
  How to reprocude:
-     create a dvr+ha router
-     create a subnet and associate this subnet with the router
-     create a vm with the subnet
-     associate a floating ip with the vm and then disassociate it
-     the vm can not access internet
+   create a dvr+ha router
+   create a subnet and associate this subnet with the router
+   create a vm with the subnet
+   associate a floating ip with the vm and then disassociate it
+   the vm can not access internet
  
  Analysis:
-     I found that the ip rule "36709: from 10.10.30.4 lookup 16"(this ip is the vm's fixed ip) is still in the router's qrouter namespace on the compute host, although I diassociated the floating ip. Then I debug the code and found dvr_edge_ha_router can not execute code into remove_floating_ip function.
+   I found that the ip rule "36709: from 10.10.30.4 lookup 16"(this ip is the vm's fixed ip) is still in the router's qrouter namespace on the compute host, although I diassociated the floating ip. Then I debug the code and found dvr_edge_ha_router can not execute code into remove_floating_ip function.

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https://bugs.launchpad.net/bugs/1644415

Title:
  dvr_edge_ha_router disassociates floatingip incompletely

Status in neutron:
  New

Bug description:
  I have a mitaka enviroment with one controller host, one network host
  and two computer hosts. All the l3 agents of my computer hosts and
  network host are configed as dvr_snat mode. I created a dvr+ha router
  and boot a vm with one of subnet associated with this router. This vm
  accesses the internet normally before or after associating a floating
  ip with it. But when I disassociated the floating ip, the vm can not
  access the internet any more.

  Pre-conditions:
    run L3 agent with dvr_snat mode on network nodes and compute nodes

  How to reprocude:
    create a dvr+ha router
    create a subnet and associate this subnet with the router
    create a vm with the subnet
    associate a floating ip with the vm and then disassociate it
    the vm can not access internet

  Analysis:
    I found that the ip rule "36709: from 10.10.30.4 lookup 16"(this ip is the vm's fixed ip) is still in the router's qrouter namespace on the compute host, although I diassociated the floating ip. Then I debug the code and found dvr_edge_ha_router can not execute code into remove_floating_ip function.

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