QA:Testcase OpenStack floating IPs

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Contents

Description

Set up Floating IPs with OpenStack

Setup

Follow QA:Testcase_launch_an_instance_on_OpenStack

Make sure that nova is configured with the correct public network interface. The default is eth0, but you can change it like:

$> echo '--public_interface=em1' | sudo tee -a /etc/nova/nova.conf
$> sudo service openstack-nova-network restart

Ensure that ICMP (ping) and SSH are allowed to your instances.

$> euca-authorize -P icmp -t -1:-1 default 
$> euca-authorize -P tcp -p 22 default 

How to test

If you've followed all of the test cases, the private network used for OpenStack instances is 10.0.0.0/24. The purpose of this functionality is to be able to assign a pool of floating public IP addresses to instances, as well.

The details of this test case are a bit specific to the environment you are using to test. For this documentation, we're going to assume that the the OpenStack server's public interface is on the 192.168.122.0/24 subnet. We are going to take an unused address from this subnet, 192.168.122.150, and define it as a floating IP address to be used by OpenStack.

$> sudo nova-manage floating create 192.168.122.150/31

Allocate an address to use for an instance:

$> euca-allocate-address
ADDRESS	192.168.122.150

Associate the allocated address with a running instance:

$> euca-associate-address -i i-00000001 192.168.122.150
ADDRESS	192.168.122.150	i-00000001

Expected Results

Verify that the public IP address got assigned to your public network interface on the OpenStack server.

$> ip addr
...
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
   link/ether 52:54:00:db:c8:51 brd ff:ff:ff:ff:ff:ff
   inet 192.168.122.58/24 brd 192.168.122.255 scope global eth0
   inet 192.168.122.150/32 scope global eth0

Verify that you can now ssh into the instance using the newly assigned address:

$> cd ~/novacreds
$> ssh -i nova_key.priv -o UserKnownHostsFile=/dev/null root@192.168.122.150

Check for new errors in the logs:

$> grep -i error /var/log/nova/*.log

If you would like, you can now disassociate and release the address assigned for testing.

$> euca-disassociate-address 192.168.122.150
ADDRESS	192.168.122.150
$> euca-release-address 192.168.122.150
ADDRESS	192.168.122.150