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unable to ping between VMs launched on separate compute nodes

asked 2014-02-20 04:36:40 -0500

Govardhan gravatar image

updated 2014-02-20 04:41:13 -0500

I have the following agents installed on compute node

q-agt, q-dhcp, q-l3, q-meta, n-cpu

I am using openvswitch plugin with tunnels enabbled.

I have lauched on VM on controller+compute node and another VM on separate compute node in private network. The VMs are launched successfully but I can't ping between VMs.

ip netns list gives qdhcp-ceff42c2-8ba0-493f-9763-da3e5e31d721

Please let me know if i miss anything

Thanks in advance :)

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answered 2014-02-20 05:49:16 -0500

Sadique Puthen gravatar image

Thinks to check:

  1. Verify both instances have got an ip address from dhcp. Login to the instance and run "ifconfig" or its equivalent to verify the interface has an ip.
  2. Verify security group rules allow icmp
  3. Verify the bridges and ports and properly created on both compute nodes.

There are more things to check, but you can start with above. Are you using ovs or linuxbridge?

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Hi Sadique Puthen, Initially the VM launched in separate compute node fails to get the ip from dhcp. Later I have installed q-dhcp agent in separate compute node. Now the VM (launched on separate node) is getting ip address from dhcp. 1) Yes both the instances are getting ip addresses in my case and 2) Security groups rules to allow ALL ICMP is added 3) I observered br-int, br-ex and br-tun bridges on both controller and compute nodes I am using ovs plugin. And in controller node i have seen two namespaces both qdhcp and qrouter. But in compute node only qdhcp is there. Does it require qrouter also inorder to establish communication b/w VMs ??. If so, please tell me which service/agent i am missing to do that ?

Govardhan gravatar imageGovardhan ( 2014-02-20 07:39:12 -0500 )edit

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Asked: 2014-02-20 04:36:40 -0500

Seen: 640 times

Last updated: Feb 20 '14