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cant reach internet from instances in icehouse

asked 2014-12-26 18:55:47 -0500

beinghuman gravatar image

Hi Everyone, I am having issues in reaching the internet from any of the instacnes created on the open-stack dashboard. Below are additional details

I have created 2 instances with following IP's. Instance1 - IP: Instance2- IP:

Host IP:

I can ping the GW or the floating IP's from the instances but i cant ping the host IP or the internet from instances. Same applies from host side as i cant ping any of the floating IP's from the host.

I currently do not have any FW rules on host and on the instances i am allowing all traffic.

Can someone please help me with this issue. Any help is appreciated.

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answered 2014-12-29 13:50:31 -0500

beinghuman gravatar image

Hi Teju, Thanks for replying to my thread. I am getting following error when i run your commands,

stack@openstack:~$ neutron net-create ext-net --shared --router:external=True --os-stack You must provide a username or user ID via --os-username, env[OS_USERNAME] or --os-user_id, env[OS_USER_ID] stack@openstack:~$ neutron net-create ext-net --shared --router:external=True --os-username stack OS Password: You must provide a project_id or project_name (with project_domain_name or project_domain_id) via --os-project-id (env[OS_PROJECT_ID]) --os-project-name (env[OS_PROJECT_NAME]), --os-project-domain-id (env[OS_PROJECT_DOMAIN_ID]) --os-project-domain-name (env[OS_PROJECT_DOMAIN_NAME])

Can we not do this from the openstack dashboard?

Thanks again for your reply.

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You need to give credentials of the user. Make changes according to your set up info export OS_USERNAME=admin export OS_PASSWORD=ADMIN_PASS export OS_TENANT_NAME=admin export OS_AUTH_URL=http://controller:35357/v2.0

rajiv-kumar gravatar imagerajiv-kumar ( 2014-12-30 07:31:00 -0500 )edit

answered 2014-12-29 02:26:07 -0500

teju gravatar image

updated 2014-12-29 02:28:30 -0500

Hi.Below are the instructions I followed. Hope this helps

  1. Create external network

    neutron net-create ext-net --shared --router:external=True

  2. Set the gateway_external_network_id and external_network_bridge in /etc/neutron/l3_agent.ini gateway_external_network_id = EXTERNAL_NTWK_UUID

    external_network_bridge = br-ex

  3. Restart l3 agent

service neutron-l3-agent restart

  1. Create subnet in the external network

neutron subnet-create ext-net --name ext-subnet \ --allocation-pool start=FLOATING_IP_START,end=FLOATING_IP_END \ --disable-dhcp --gateway EXTERNAL_NETWORK_GATEWAY EXTERNAL_NETWORK_CIDR

  1. Set the external network as gateway to the router

    neutron router-gateway-set ROUTER_NAME EXTERNAL_NETWORK_NAME

  2. Get a floating IP from the floating IP pool

    neutron floatingip-create ext-net

  3. Associate the floating IP to an instance

    nova floating-ip-associate INSTANCE_NAME FLOATING_IP

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Asked: 2014-12-26 18:55:47 -0500

Seen: 417 times

Last updated: Dec 29 '14