Change root password on kvm qcow2 image

How to change root password on kvm qcow2 image guestfish is an interactive shell that you can use from the command line or from shell scripts to access guest virtual machine file systems. All of the functionality of the libguestfs API is available from the shell. We will use the guestfish tool to modify the […]
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Add Compute Node on Existing OpenStack using Packstack

While single-node configurations are acceptable for small environments, testing or POCs most production environments will require a multi-node configuration for various reasons. As we know multi-node configurations group similar OpenStack services and provide scalability as well as the possibility for high availability. One of the great things about OpenStack is the architecture. Every service is […]
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internal DNS resolution with neutron network

The Networking service enables users to control the name assigned to ports by the internal DNS. We will check to enable internal DNS resolution with neutron network on openstack cloud. The internal DNS functionality offered by the Networking service and its interaction with the Compute service. Integration of the Compute service and the Networking service […]
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cloud-init and key pair error openstack

Recently we have received the following errors in OpenStack console and  The ssh key could not be injected and the cloud-init cannot contact the server. [ 43.395174] vdb: unknown partition table [ 113.888499] cloud-init[774]: 2016-08-29 20:01:03,415 – url_helper.py[WARNING]: Calling ‘http://169.254.169.254/2009-04-04/meta-data/instance-id’ failed [50/120s]: unexpected error [‘NoneType’ object has no attribute ‘status_code’] [ 164.924980] cloud-init[774]: 2016-08-29 20:01:54,454 – […]
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Enable Nested virtualization openstack cloud

Nested virtualization is guest operating system is itself a hypervisor that virtualizes not just processors and memory but also storage, networking hardware assists, and other resources. The VM hypervisor represents the first implementation of practical nested virtualization with hardware assists for performance. There are a number of hypervisors support nested virtualization though not as efficiently […]
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Install openstack liberty using packstack

Packstack is a utility that uses Puppet modules to deploy various parts of OpenStack on multiple pre-installed servers over SSH automatically. This utility is still in the early stages, a lot of the configuration options have yet to be added Currently its support Fedora, Red Hat Enterprise Linux (RHEL) and compatible derivatives of both are […]
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LDAP integration with openstack Keystone

Keystone supports integration with an existing LDAP directory for authentication and authorization services. I have tested this schema with Ubuntu 14.04, CentOS 6.4 openLDAP with openstack icehouse and its successfully connected. Use the following steps to LDAP integration with openstack Keystone. Install LDAP on Ubuntu or Centos sudo apt-get install slapd ldap-utils sudo dpkg-reconfigure slapd set […]
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How to change keystone API V2 to V3

The Keystone Identity Service allows clients to obtain tokens that can be used to access OpenStack cloud services. This document is intended for software developers interested in developing applications that utilize the Keystone Identity Service API for authentication. The OpenStack Identity API is implemented using a RESTful web service interface. All requests to authenticate and […]
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