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…

Extend the root partition of your VM online – without LVM

One of the Major issue facing by Cloud User is, the root disk will be small even you are using a high flavor. Suppose your flavor disk is 160GB, but root disk on the VM is 8GB. So, how can I extend the root partition online without unmount, and LVM. Here is the solution. I…