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…

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…

Traffic policing in Running VMs – Openstack

One of the major issued facing by a cloud administrator is to control the traffic in/out in a virtual machine. There is two methods you can control this, first one is to inject a special meta-data into the flavor. Second method is to apply special controls on the virtual interface of a running virtual machine.…