Posted in Cloud, Openstack

Compare Openstack Vs VMware

I came across some good info about the difference between two major Iaas provider Openstack and VMware. So thought of sharing with this blog. Couple of differences are as follows.

 

VMware vs Openstack

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Posted in Cloud, Linux, Openstack

Basic Cinder (volume) service functionality in Openstack – Part2

We saw volume creation with related issues and probable solutions.

Now we will see volume attach to VM. Create partition on it. Remove it and detach volume from VM.

Attach created volume to testvm. Following is command-line requirement for cinder volume-attach.

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Volume ID will get it from cinder-list use auto to autoassign the new device.

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You can check volume status is changed to in-use now and also changed attached with VM ID.

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Continue reading “Basic Cinder (volume) service functionality in Openstack – Part2”

Posted in Cloud, Linux, Openstack

Basic Cinder (volume) service functionality in Openstack – Part1

In this post I am going to show you basic functionality of openstack cinder (volume) service functionality by creating volume on internal storage. Attaching that volume to VM. Create partition on that volume in client machine and test partition remove and detaching volume from VM.

Lets take one running state vm for cinder testing as we can do this operation on the fly. I have one VM name testvm.

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Check the disk and partitions on the VM. I can access the testvm using private IP and public IP. Lets access it using private IP using unique network namespace.

First check private-net network ID and test the ping to private IP of VM using network namespace. For more details about basic networking in openstack check my last blog posts.

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Posted in Linux, Openstack

Failed to start OpenStack Identity Service (code-named Keystone).

When you installed Openstack using packstack you might have faced openstack-keystone service issue. When try it to restart it fails with code-name keystone error.

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I have done some research on it and found the solution.

The issue is with Openstack Keystone Service which we have configured using httpd deamon in answers.cfg file ( configuration file used to install Openstack using packstack)

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Now openstack-keystone service will not start as http service is already in started mode and we haven’t created any relation between openstack-keystone and http service.

So to start openstack-keystone service we have to create symbolic link and point openstack-keystone service to http service.

Continue reading “Failed to start OpenStack Identity Service (code-named Keystone).”

Posted in Cloud, network, Openstack

Basic networking in Openstack Part 1

Once you install Openstack in single node or multinode setup next thing is to setup network. To understand networking in Openstack is little tedious job. This post is to describe basic Openstack networking concept by creating internal/external networking and testing the same.

First delete all default network like public and private which were created by default after Openstack installation using

#neutron net-delete <net-name>

Let us create new internal network first.

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Create subnet for network private-net with subnet address 10.0.0.0/24

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Posted in Linux, Uncategorized

Graphical/Desktop UI for Centos 7/RHEL 7

Many times we need graphical UI to open/run some applications. So following are simple and quick steps to create graphical UI on Centos7/RHEL7.

First check you have yum repository configured to access local or internet repository

#yum repolist

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Graphical UI filesets will install in group so that all required/dependent filesets will install automatically. Check all available groups in yum repository using group list

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Posted in Linux, Openstack

Multinode Openstack Installation on Centos 7/RHEL 7

This post describing multinode OpenStack installation on centos7/rhel7 for Liberty release. If you want to do single node installation please refer my earlier post.

We are installing OpenStack onto 3 nodes controller,compute and network using packstack utility

Following is 3 node Openstack Architecture and related Openstack services running on respective nodes. I am using two network one is management network of 192.168.56.* which is used for internal communication between nodes and one external network used to assign public IP to VM and to access instances/VM from outside. I am also using NATed DHCP ip on each nodes to download required filesets from internet.

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Posted in Linux, Openstack

Openstack Liberty install using packstack on Centos 7/RHEL 7

This post is a quickstart guide to install OpenStack Liberty release using packstack on CentOS7.

This is very basic POC setup where all components will be installed on one node only. I will create another post for multinode installation setup.

  1. Install CentOS using minimal install Software Selection.

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