Comment 16 for bug 1399168

Release note for 5.1.1:

ISSUE: Virtual Machines fail to start due to slow processing of IP tables rules

SUMMARY: In some larger scale environments, virtual machines fail to launch due to slow processing of IP tables rules. Environments with large numbers of compute nodes and VMs can lead to large IP tables in total if they apllied. Slow processing of large IP tables can lead to service timeouts that may prevent virtual machines from launching.

The problem is fixed in python-neutron package from MOS 5.1.2 (attached to the LP ticket).

Steps to apply patches on CentOS environments:
(should be done one by one on all compute nodes, then on all controllers, also one by one)

Upload package python-neutron-2014.1.3-fuel5.1.2.mira2.noarch.rpm to current node:
Execute the following on the node:
Run the following commands:
[root@node-2 ~]# rpm -Uvh --nodeps python-neutron-2014.1.3-fuel5.1.2.mira2.noarch.rpm
warning: python-neutron-2014.1.3-fuel5.1.2.mira2.noarch.rpm: Header V3 RSA/SHA1 Signature, key ID bf906159: NOKEY
Preparing... ########################################### [100%]
 1:python-neutron ########################################### [100%]
Make sure step 2 doesn’t produce any errors
On computes nodes do: service neutron-openvswitch-agent restart
On one of controller nodes: crm resource restart clone_p_neutron-openvswitch-agent