Month: December 2016

Bash, Cloud Computing

Create tenant in OpenStack Newton using command line interface

Dec 28, 2016 by Grzegorz Juszczak 0 Comments , , , , , , , ,

Create tenant in Openstack Newton using command line interface
OpenStack comes out of the box with it’s dashboard called Horizon. Horizon provides GUI, which let us manage our OpenStack environment in pretty easy and inuitive way. However basic tasks, like tenant creation or instance commissioning, can be time consuming when performed in Horizon. Using command line interface with previously prepared command templates can be more efficient and faster.

In this tutorial we present how to create Project Tenant in OpenStack Newton using command line intrerface and launch Cirros based Instances inside the Tenant.

Some time ago OpenStack Community introduced new tool called OpenStackClient (OSC) with it’s openstack command utility to unify OpenStack management, which encompasses the following components: Compute, Identity, Image, Object Storage and Block Storage APIs. So far keystone command utility was withdrawn from OpenStack as deprecated and replaced by mentioned openstack command utility. In this tutorial for Newton release we are going to use openstack commands where possible to become familiar with OpenStackClient CLI.
Read More

Cloud Computing

Install OpenStack Newton All In One with Heat Service on CentOS 7

Dec 11, 2016 by Grzegorz Juszczak 10 Comments , , , , , , , , ,

Install OpenStack Newton All In One with Heat Service on CentOS 7
In OpenStack all-in-one configuration all OpenStack nodes (controller node, compute node, network node) are installed on a single machine. All in one configuration can be quickly deployed for testing purposes and is often recommended for developers to test their applications on top of OpenStack environment.

In this tutorial we install OpenStack Newton release from RDO repository including Heat Orchestration service on single node (all-in-one installation) based on CentOS 7 / RHEL 7 using packstack installer script.
Read More

Linux

Install Ansible on Fedora via DNF from RPM packages

Dec 10, 2016 by Grzegorz Juszczak 0 Comments , , , , , , ,

Install Ansible on Fedora via Yum from RPM packages
Ansible is a simple open-source automation tool that can automate cloud deployment, application deployment or Linux OS maintenance. Comparing Ansible to other automation tools (i.e. Puppet), it’s the simplest tool, because it’s agentless. Ansible once installed on a control node, connects to a managed node via SSH, which doesn’t require any client applications installed on that node.

Installation of Ansible on Fedora based control node is pretty simple and straightforward, since it can be installed from RPM packages. In this tutorial we are installing Ansible on Fedora 23 via dnf package manager.
Read More

Linux

GRUB 2 Custom Splash Screen on RHEL 7 UEFI and Legacy ISO Image

Dec 4, 2016 by Grzegorz Juszczak 0 Comments , , , , , , , , ,

GRUB 2 Custom Splash Screen on RHEL 7 UEFI and Legacy ISO Image
GRUB2 Linux Boot Loader provides few customization options, that can transform it into an attention drawing eye candy. It’s main feature is the possibility to customize the splash screen being displayed with GRUB 2 menu entries upon system boot. This feature can be used not only in GRUB2 installed on hard disk for already installed operating systems, but also in GRUB2 Boot Loader placed on ISO image when booting from ISO/CD/DVD. This is pretty useful as well, when we want to create customized ISO image with the company logo based on some Linux Distro, which provides a company product.

In this tutorial we present how to create:

  1. GRUB2 custom splash screen on RHEL 7 / CentOS 7 ISO image for UEFI Boot
  2. GRUB2 custom splash screen on RHEL 7 / CentOS 7 ISO image for Legacy BIOS Boot

Read More