How to manually copy SSH public keys to servers on Red Hat Enterprise Linux

How to manually copy SSH public keys to servers on Red Hat Enterprise Linux

lufimtse
By Leo Ufimtsev

We often use ssh-copy-id to copy ssh keys from our local Linux computers to RHEL servers in order to connect without typing in a password. This is not only for convenience; it enables you to script and automate tasks that involve remote machines.  Also, using ssh keys correctly is considered a best practice.  If you are conditioned to respond with your password every time you are prompted, you might not notice a prompt that isn’t legitimate (for example, spoofed).

What about when you can’t use ssh-copy-id or the target user ID doesn’t have a password (for example, an Ansible service user)? This article explains how to do it manually and avoid the common pitfall of forgetting to set the proper permissions.

Continue reading “How to manually copy SSH public keys to servers on Red Hat Enterprise Linux”

Share

Spring Boot-enabled business process automation with Red Hat Process Automation Manager

duncandoyle
By Duncan Doyle

With the release of version 7.1 of Red Hat Process Automation Manager (RHPAM), the platform now supports the deployment of the process automation manager runtime as a “capability” within Spring Boot applications. As Maciej Swiderski, the project lead for jBPM.org (the upstream community project for RHPAM) explained earlier this year, the KIE (Knowledge Is Everything) platform on which RHPAM is built provides Spring Boot Starters to quickly build a business application or microservice with process and case execution capabilities using a minimal amount of code.

Continue reading “Spring Boot-enabled business process automation with Red Hat Process Automation Manager”

Share
Analyzing and reducing SystemTap’s startup cost for scripts

Analyzing and reducing SystemTap’s startup cost for scripts

wcohen2013
By William Cohen

SystemTap is a powerful tool for investigating system issues, but for some SystemTap instrumentation scripts, the startup times are too long. This article describes how to analyze and reduce SystemTap’s startup costs for scripts.

We can use SystemTap to investigate this problem and provide some hard data on the time required for each of the passes that SystemTap uses to convert a SystemTap script into instrumentation. SystemTap has a set of probe points marking the start and end of passes from 0 to 5:

  • pass0: Parsing command-line arguments
  • pass1: Parsing scripts
  • pass2: Elaboration
  • pass3: Translation to C
  • pass4: Compilation of C code into kernel module
  • pass5: Running the instrumentation

Continue reading “Analyzing and reducing SystemTap’s startup cost for scripts”

Share
How to run Kafka on Openshift, the enterprise Kubernetes, with AMQ Streams

How to run Kafka on Openshift, the enterprise Kubernetes, with AMQ Streams

hguerrero
By Hugo Guerrero

On October 25th Red Hat announced the general availability of their AMQ Streams Kubernetes Operator for Apache Kafka. Red Hat AMQ Streams focuses on running Apache Kafka on Openshift providing a massively-scalable, distributed, and high performance data streaming platform. AMQ Streams, based on the Apache Kafka and Strimzi projects, offers a distributed backbone that allows microservices and other applications to share data with extremely high throughput. This backbone enables:

  • Publish and subscribe: Many to many dissemination in a fault tolerant, durable manner.
  • Replayable events: Serves as a repository for microservices to build in-memory copies of source data, up to any point in time.
  • Long-term data retention: Efficiently stores data for immediate access in a manner limited only by disk space.
  • Partition messages for more horizontal scalability: Allows for organizing messages to maximum concurrent access.

One of the most requested items from developers and architects is how to get started with a simple deployment option for testing purposes. In this guide we will use Red Hat Container Development Kit, based on minishift, to start an Apache Kafka cluster on Kubernetes.

Continue reading “How to run Kafka on Openshift, the enterprise Kubernetes, with AMQ Streams”

Share
How to install Ansible Tower on Red Hat OpenShift

How to install Ansible Tower on Red Hat OpenShift

mnaldini
By Michele Naldini

In this article, I will show how to install and manage Red Hat Ansible Tower on Red Hat OpenShift Container Platform. Ansible Tower helps you scale IT automation, manage complex deployments, and improve productivity. You can centralize and control your IT infrastructure with a visual dashboard, and it provides role-based access control, job scheduling, integrated notifications, graphical inventory management, and more.

As you may know, Ansible Tower 3.3, the latest release of this automation platform, was released a few weeks ago and added new features. From the release notes you’ll see that Ansible Tower 3.3 added support for a container-based installation on top of OpenShift or Kubernetes.

In this blog, we’ll see how easy it is to set up Ansible Tower 3.3 on OpenShift and have it running as a container in just a few minutes.

Continue reading “How to install Ansible Tower on Red Hat OpenShift”

Share
Welcome Apache Kafka to the Kubernetes Era!

Welcome Apache Kafka to the Kubernetes Era!

hguerrero
By Hugo Guerrero

We have pretty exciting news this week as Red Hat is announcing the General Availability of their Apache Kafka Kubernetes operator. Red Hat AMQ Streams delivers the mechanisms for managing Apache Kafka on top of OpenShift, our enterprise distribution for Kubernetes.

Everything started last May 2018 when David Ingham (@dingha) unveiled the Developer Preview as new addition to the Red Hat AMQ offering. Red Hat AMQ Streams focuses on running Apache Kafka on OpenShift. In the microservices world, where several components need to rely on a high throughput communication mechanism, Apache Kafka has made a name for itself for being a leading real-time, distributed messaging platform for building data pipelines and streaming applications.

Continue reading “Welcome Apache Kafka to the Kubernetes Era!”

Share
GCC 8 and tools now in beta for Red Hat Enterprise Linux 6 and 7

GCC 8 and tools now in beta for Red Hat Enterprise Linux 6 and 7

mikeguerette
By Mike Guerette

We are pleased to announce the immediate availability of Red Hat Developer Toolset 8 beta for Red Hat Enterprise Linux 6 and 7.  The key new components for this release are:

  • GCC 8.2.1
  • GDB 8.2
  • Updated components such as SystemTap, Valgrind, OProfile, and many more

Like other tools, these are installable via yum from the Red Hat Enterprise Linux 6 or 7 Devtools or RHSCL channel.  For more details, see the “New Features” section below.

Continue reading “GCC 8 and tools now in beta for Red Hat Enterprise Linux 6 and 7”

Share
Clang/LLVM 6.0, Go 1.10, and Rust 1.29 now in beta for Red Hat Enterprise Linux

Clang/LLVM 6.0, Go 1.10, and Rust 1.29 now in beta for Red Hat Enterprise Linux

mikeguerette
By Mike Guerette

We are pleased to announce the immediate availability of these three compiler toolsets now in beta for Red Hat Enterprise Linux 7.  Upon the GA release, these versions will become officially supported Red Hat offerings:

  • Clang/LLVM 6.0
  • Go 1.10
  • Rust 1.29

These toolsets can be installed from the Red Hat Enterprise Linux 7 Devtools channel.  See the “New compiler details” below to learn about the new features.

Continue reading “Clang/LLVM 6.0, Go 1.10, and Rust 1.29 now in beta for Red Hat Enterprise Linux”

Share
Newest PHP, Varnish Cache, MySQL, NGINX, Node.js, and Git now in beta

Newest PHP, Varnish Cache, MySQL, NGINX, Node.js, and Git now in beta

mikeguerette
By Mike Guerette

We are pleased to announce the immediate availability Red Hat Software Collections 3.2 beta, which adds these components to Red Hat Enterprise Linux 7:

  • PHP 7.2
  • Varnish Cache 6.0
  • MySQL 8.0
  • NGINX 1.14
  • Node.js 10
  • Git 2.18
  • Update of Apache HTTP server 2.4

These beta versions are available on Red Hat Enterprise Linux 7 (Devtools or RHSCL channel) for x86_64, s390x, aarch64, and ppc64le.  Read more details about each component in the “New Components details” section.

Continue reading “Newest PHP, Varnish Cache, MySQL, NGINX, Node.js, and Git now in beta”

Share
Modern web applications on OpenShift: Part 2 — Using chained builds

Modern web applications on OpenShift: Part 2 — Using chained builds

lholmqui
By Lucas Holmquist

In the previous post, we took a quick look at a new source-to-image (S2I) builder image designed for building and deploying modern web applications on OpenShift. While the last post was focused on getting your app deployed quickly, this post will look at how to use the S2I image as a “pure” builder image and combine it with an OpenShift chained build.

Continue reading “Modern web applications on OpenShift: Part 2 — Using chained builds”

Share