20 articles Openstack

What is an Addresspair and How it configure in Openstack HA Instances

Address Pair Allowed-address-pairs allow you to specify mac_address/ip_address (CIDR) pairs that pass through a port regardless of subnet. This enables the use of protocols such as VRRP, which floats an IP address between two instances to enable fast data plane failover. Use Case. Consider, you are building a HA cluster for your App / DB…

Live Migration failure: Cannot get interface MTU on ‘qbrXXXXXXXX-XX’

Some times, when you are doing a live migration , it will ended up with the following error in the nova-compute.log of hypervisor. The reason for this as follows. The Interface was removed by the user, but LIBVIRT doesnt acknowledged about this. But nova did. So, when nova initiates a live migration, libvirt is looking…

How to check the Status of your Backend Services Mirantis Openstack.

echo “show stat” | socat /var/lib/haproxy/stats stdio | grep BACKEND | awk -F , ‘{print $1, $2, $18}’ Output will be stats BACKEND UP horizon BACKEND UP keystone-1 BACKEND UP keystone-2 BACKEND UP nova-api-1 BACKEND UP nova-api-2 BACKEND UP nova-metadata-api BACKEND UP cinder-api BACKEND UP glance-api BACKEND UP neutron BACKEND UP glance-registry BACKEND UP mysqld…