Blog Grid

RAID 1 configuration on HP Proliant Gen 9 server using HP SSA

Mount WebDAV remote storage in Fedora Linux using davfs2 driver
HPE Smart Storage Administrator is a tool that allows to quickly configure and manage storage controllers on HPE Proliant servers. HPE SSA offers a simple, intuitive and easy to use GUI interface to quickly create, modify and erase storage arrays based on physical drives installed in the server. HPE SSA replaces the HPE Array Configuration Utility (ACU), and has an updated design for HPE ProLiant servers that enhances the storage experience.

In this short tutorial we will create one of the simplest storage arrays, which is RAID 1 based on two physical drives. RAID 1 (mirroring) provides a replication on all physical drives by writing data to all of them at the same time, it gives us fault-tolerance of N-1 drives where N is a number of used physical drives.
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Deploy project tenant in OpenStack using Heat orchestration stack

Deploy tenant in OpenStack using Heat Orchestration service stack
Heat is an OpenStack Orchestration service, which implements an orchestration engine to launch multiple composite cloud applications based on templates in the form of text files that can be treated like code. Heat service is able to read YAML (.yaml, .yml) files and perform different tasks inside OpenStack environment included in YAML components. Using Heat Orchestration we can create instances, networks or even whole tenants with just single mouse click in OpenStack dashboard (Horizon), if we have previously prepared YAML file with Heat instructions to be performed in OpenStack cloud.

In this tutorial we will create example .yaml file for Heat orchestration containing instructions and components needed to deploy project tenant in OpenStack and launch instances inside the tenant. Next, we will create our stack on single OpenStack all-in-one node based on CentOS 7.3 operating system.
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Fedora DNF rollback RPM package update, removal, installation

DNF rollback RPM package update, removal or installation
DNF is a next generation package manager for RPM-based Linux distributions, commonly used in newest Fedora releases. DNF is a Yum succesor, which provides Yum backward compatibility, but one of aspects, which make DNF a powerful package manager is the ability to manage transaction history.

Using DNF, we can easily undo or redo RPM package upgrade, installation and removal. This gives us the opportunity to rollback the system, if we feel, that our recent RPM package operations disordered the system.

Below we presents, how to work with DNF transaction history on Fedora 24.
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Mount WebDAV remote storage in Fedora Linux using davfs2 driver

Mount WebDAV remote storage in Fedora Linux using davfs2 driver
WebDAV (Web Distributed Authoring and Versioning) is an extension of the Hypertext Transfer Protocol (HTTP) that allows clients to perform remote Web content authoring operations. The WebDAV protocol provides a framework for users to create, change, copy, move, lock and version the files on a server, typically a web server or web share. This type of protocol is used by some hosting providers (like my favorite HostUpon) in cPanel software, to provide quick and easy access to the files stored in hosting account disk space.

In this tutorial we are mounting remote WebDAV resource in Fedora release 24 via davfs2 file system driver.
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Install Jenkins on Fedora 23 from RPM via DNF package manager

Jenkins is a popular and open source automation server written in Java, which helps automate the non-human part of the whole software development process. Jenkins supports BASH shell scripts, can be integrated with version control systems and it’s builds can be scheduled via a cron-like mechanism.

In this tutorial we are installing Jenkins stable version from RPM package via Jenkins dedicated repository using DNF package manager.
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Create tenant in OpenStack Newton using command line interface

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.
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