RHEL

Get started building Node.js v4 applications in docker containers on Red Hat Enterprise Linux in under 15 minutes. Introduction and Prerequisites In this tutorial, you will learn how to start building Node.js v4 applications in docker containers on Red Hat Enterprise Linux. In order to build and run containers you will first install docker on your Red Hat Enterprise Linux 7 system. You will use the Node.js v4 container image from Red Hat Software Collections (RHSCL) 2.2 as the basis...

Get started developing with Python on Red Hat Enterprise Linux in under 10 minutes. Introduction and Prerequisites In this tutorial, you will see how to get started with Python development on Red Hat Enterprise Linux by creating a simple Hello World application. The tutorial should take 5 to 10 minutes to complete. On Red Hat Enterprise Linux, Python is installed by default. You can skip directly to Hello Word and your first application, or continue reading to learn more about...

Get started developing with Java 8 on Red Hat Enterprise Linux in under 10 minutes. Introduction and Prerequisites In this tutorial, you will see how to get started with Java development on Red Hat Enterprise Linux by creating a simple Hello World application. You will install a Java Development Kit (JDK), and learn what Java packages are available. The whole tutorial should take less than 10 minutes to complete. You will need a Red Hat Enterprise Linux 7 system with...

Get started developing with native PHP on Red Hat Enterprise Linux in under 10 minutes. Introduction and Prerequisites In this tutorial, you will see how to get started with PHP development on Red Hat Enterprise Linux by creating a simple Hello World application. The tutorial should take 5 to 10 minutes to complete. Before you begin, you will need a current Red Hat Enterprise Linux 6 or 7 workstation or server subscription that allows you to download software and get...

It's been a while since Red Hat released version 3.3 of OpenShift Container Platform, this version is full of features. One of my favorites is the support for Pipelines (Tech Preview for now) that lets you easily integrate Jenkins builds on your OpenShift (Origin) Platform. OpenShift Pipelines OpenShift Pipelines are based on the Jenkins Pipeline plugin. ( https://jenkins.io/solutions/pipeline/) Integrating Jenkins Pipelines into OpenShift unlocks all the features for the CI/CD world enabling its users to easily manage repeatable tasks in...

Microsoft announced the first "alpha" release of the new MSBuild-based .NET Core tools. .NET Core SDK which can be downloaded from the Red Hat Developer Program site consists of .NET Core Runtime and .NET Core command line tools (.NET Core CLI). (Reminder - you must have a Red Hat Enterprise Linux subscription first. If you don't, you can go here for a no-cost subscription.) The MSBuild tool is included in .NET Core 1.0 preview 3 (not in the latest release...

With the release of Red Hat JBoss Developer Studio 10.2, it is now possible to install Red Hat JBoss Developer Studio as an RPM. It is available as a tech preview. The purpose of this article is to describe the steps you should follow in order to install Red Hat JBoss Developer Studio. Red Hat Software Collections JBoss Developer Studio RPM relies on Red Hat Software Collections. You don’t need to install Red Hat Software Collections but you need to...

Get started building Ruby applications in docker formatted containers using the Red Hat Container Development CDK (CDK) 2. Introduction and Prerequisites In this tutorial, you will learn how to start building Ruby applications in docker formatted containers using the Red Hat Container Development Kit (CDK) 2 on Red Hat Enterprise Linux. You need to have CDK 2 installed and should have downloaded the Red Hat Enterprise Linux vagrant box for your system. See the CDK 2 Installation Guide for more...

Get started building Python applications in docker formatted containers using the Red Hat Container Development CDK (CDK) 2 Introduction and Prerequisites In this tutorial, you will learn how to start building Python 3 applications in docker formatted containers using the Red Hat Container Development Kit (CDK) 2 on Red Hat Enterprise Linux. You need to have CDK 2 installed and should have downloaded the Red Hat Enterprise Linux vagrant box for your system. See the CDK 2 Installation Guide for...

Get started building PHP applications in docker formatted containers using the Red Hat Container Development CDK (CDK) 2. Introduction and Prerequisites In this tutorial, you will learn how to start building PHP applications in docker formatted containers using the Red Hat Container Development Kit (CDK) 2 on Red Hat Enterprise Linux. You need to have CDK 2 installed and should have downloaded the Red Hat Enterprise Linux vagrant box for your system. See the CDK 2 Installation Guide for more...

Get started building Node.js applications in docker formatted containers using the Red Hat Container Development CDK (CDK) 2. Just 3 easy steps. Introduction and Prerequisites In this tutorial, you will learn how to start building Node.js applications in docker formatted containers using the Red Hat Container Development Kit (CDK) 2 on Red Hat Enterprise Linux. You need to have CDK 2 installed and should have downloaded the Red Hat Enterprise Linux vagrant box for your system. See the CDK 2...

Microsoft announced SQL Server on Linux public preview, so now you can try SQL Server on your Red Hat Enterprise Linux server. I'll describe how to start SQL Server on RHEL. Install and connect with CLI on RHEL Microsoft publishes a step-by-step document how to Install SQL Server on Red Hat Enterprise Linux. It's only 7 steps to install and run. # systemctl status mssql-server ● mssql-server.service - Microsoft(R) SQL Server(R) Database Engine Loaded: loaded (/usr/lib/systemd/system/mssql-server.service; enabled; vendor preset: disabled)...

Containers are one of the top trend today. Starting working or playing with them could be really hard also if you've well understood the theory at their base. With this article I'll try to show you some useful tips and tricks to start into containers world, thanks also to the great web interface provided by the Cockpit project. Cockpit overview Cockpit is an interactive server admin interface. You'll find below some a of its great features: Cockpit comes “out of...

It's been a while since our last deep-dive into the Docker project graph driver performance. Over two years, in fact! In that time, Red Hat engineers have made major strides in improving container storage: Introduced the docker-storage-setup package to help make configuring devicemapper-based storage a snap. Introduced full support for overlay FS in RHEL7.2+ when used with containers Introduced overlay2 as Tech Preview mode Gotten SELinux support to both overlay and overlay2 merged into upstream kernel 4.9 Added a warning...

MACsec is an IEEE standard for security in wired ethernet LANs. This blog , will give an overview of what MACsec is, how it differs from other security standards, and present some ideas about how it can be used. MACsec is a Layer 2 protocol that relies on GCM-AES-128 to offer integrity and confidentiality, and operates over ethernet. It can secure all traffic within a LAN, including DHCP and ARP, as well as traffic from higher layer protocols. It is...

Open vSwitch is a software switch responsible for providing network connectivity to virtual machines or containers. Since it is programmable, it brings a challenge to understand what is going on in the network. Open vSwitch (OVS) is an OpenFlow virtual switch, so before talking about OVS itself, it is necessary to introduce OpenFlow a bit. OpenFlow is an open standard protocol that allows separation of the packet forwarding (data plane) from the high level routing decisions (control plane). The control...

Microservices are becoming a new trend, thanks to the modularity and granularity they provide on top of advantages like releasing applications in a continuous manner. There are various platforms and projects that are rising which aims to make writing and managing microservices easy. Keeping that in mind, I thought, why not make a demo application that can give an example of how microservices are built and how they interact. In this article, I will be building a small application using...

P/Invoke(Platform Invocation Service) is one of the features of CLI (Common Language Interface) on .NET Framework. P/Invoke enables managed code to call a native function in DLL (Dynamic Link Library). It's a powerful tool for .NET Framework to execute existing C-style functions easily. .NET Core also has a P/Invoke feature and it means we can call a native function in .so file (Linux) and . file (Max OSX). I will show you the short example P/Invoke in .NET Core on...

Red Hat Enterprise Linux (RHEL) is not Ubuntu. Out of the box, it seems the default packages installed for developers are somewhat limited. To provide exceptional long-term stability, Red Hat takes a different approach to default packages and software repositories (repos). Development tools aren't installed unless specifically selected. The repos that are initially enabled only contain packages that Red Hat supports over the long term lifecycle of RHEL. Because RHEL’s default repos don’t have as large a selection of development...

Over the last couple of weeks, I've been working on some Red Hat JBoss BPM Suite workshop material. One part of the workshop is a four-hour lab that guides the attendees through the development of JBoss BPM Suite 6.x processes, rules and applications (note that this workshop is available to our customers, please contact your Red Hat account manager or local Red Hat sales representative for more information), but I'm going to be sharing part of the story with you...

Being able to edit your C# (or F# for that matter) code on your Linux VM from Visual Studio in Windows is pretty great. As a Windows developer, you're able to work in an environment you know and trust while still being able to experiment -- and hopefully produce production code -- in Linux, where you may not be quite up to speed. Yet. Visual Studio, that familiar, productive and helpful IDE, is at your fingertips even though your code...

In the process of writing my posts ( #1 and #2) on . NET Core and RHEL, it was made clear to me by several friends that I had neglected to use the de facto standard for continuous integration on Linux, Jenkins. Always happy to try out new (to me) tools, I settled in for what I was assured would be a simple configuration to test out my previous work in this bastion of automation. What is Jenkins? The first...

From a developer’s perspective, “incident management” can be a pretty ambiguous term. While the first thing that comes to mind is receiving and responding to alerts, most IT professionals know it is so much more than that. Effective incident management starts with data collection and continues through alerting, escalation, collaboration, and resolution. At the server level, the most important pieces of incident management are infrastructure monitoring and log management, the vast majority of which are easily configurable on a Red...

Around this time last year, Fedora 22 brought a major update for anyone working under the Fedora hood -- Yum was deprecated and replaced by DNF. It brings some significant changes: Faster, more mathematically correct method for solving dependency resolution A “clean”, well documented Python API with C bindings & Python 3 support Isn’t this a Release by Another Name? No, DNF marks a shift, and not just a fork to Python 3, C support and cleaner docs. The move...