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steps to troubleshoot virtual machine

asked 2018-01-16 04:29:37 -0500

deepak2112 gravatar image

1) virtual machine is not communicating with each other. 2) virtual machine is not able to communicate with external networking. 3) Virtual machine is not getting IP . what are the steps to be taken for troubleshooting ..

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Point 3 is the cause for points 2 and 1.

You need to find out how traffic flows from the DHCP server to the instance, and where it is blocked. Without knowing your setup, all I can offer is the Networking Guide:

Bernd Bausch gravatar imageBernd Bausch ( 2018-01-16 09:15:39 -0500 )edit

my vm are not pinging from each other , where i need to look on this.!!

deepak2112 gravatar imagedeepak2112 ( 2018-01-17 04:44:13 -0500 )edit

They are not pinging because, as you say:

3) Virtual machine is not getting IP

Bernd Bausch gravatar imageBernd Bausch ( 2018-01-17 05:27:57 -0500 )edit

they got ip address but are not pinging.!!

deepak2112 gravatar imagedeepak2112 ( 2018-01-17 05:36:41 -0500 )edit

enable ALL ICMP ingress on your security rules, that will help pinging between VM's.

TijoV gravatar imageTijoV ( 2018-01-17 07:34:37 -0500 )edit

3 answers

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answered 2018-01-16 04:49:29 -0500

Deepa gravatar image

check your rules ?Which all rules have you added

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answered 2018-01-17 04:16:07 -0500

ShyamBiradar gravatar image
  1. Virtual machine not getting Ip: You need to check if neutron dhcp agent is running well with "neutron agent-list" command and also openvswitch agent should also work fine.

  2. External connectivity: i) Check your network topology carefully, make sure you assigned a gateway to neutron router and both internal and external interfaces are up ii) Check neutron agent-list and make sure all agents are up iii) Check port map with ovs command(ovs-vsctl show) to make sure tunneling is setup correctly if you are using openvswitch iv) Check firewalls on compute and neutron node

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answered 2018-01-18 01:34:16 -0500

TijoV gravatar image

Please read this link it will give you the required information

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Asked: 2018-01-16 04:29:37 -0500

Seen: 116 times

Last updated: Jan 18 '18