cli

Intro to Podman (Red Hat Enterprise Linux 7.6 Beta)

Intro to Podman (Red Hat Enterprise Linux 7.6 Beta)

Red Hat Enterprise Linux (RHEL) 7.6 Beta was released a few days ago and one of the first new features I noticed is Podman. Podman complements Buildah and Skopeo by offering an experience similar to the Docker command line: allowing users to run standalone (non-orchestrated) containers. And Podman doesn’t require a daemon to run containers and pods, so we can easily say goodbye to big fat daemons.

Podman implements almost all the Docker CLI commands (apart from the ones related to Docker Swarm, of course). For container orchestration, I suggest you take a look at Kubernetes and Red Hat OpenShift.

Podman consists of just a single command to run on the command line. There are no daemons in the background doing stuff, and this means that Podman can be integrated into system services through systemd.

We’ll cover some real examples that show how easy it can be to transition from the Docker CLI to Podman.

Continue reading “Intro to Podman (Red Hat Enterprise Linux 7.6 Beta)”

Share
JBoss EAP 7 Domain deployments – Part 3:  Domain deployment with Common Language Interface CLI.

JBoss EAP 7 Domain deployments – Part 3: Domain deployment with Common Language Interface CLI.

In this series of articles, I will present several ways to deploy an application on an EAP Domain. The series consists of four parts. Each one will be a standalone article, but the series as a whole will present a range of useful topics for working with JBoss EAP.

In part one, we set up a simple EAP domain with the following topology:

JBoss EAP Simple Domain

JBoss EAP Simple Domain

In part two, we reviewed the EAP management console deployment mechanism, and deployed the helloworld-html5 EAP Quickstart on the main-server-group ( Server11 and Server21).

When it comes to interactions with a continuous deployment software factory, however, we need more powerful and flexible tools to organize the build and deployment process — the management console is not a good fit for build automation.

To solve this problem, JBoss EAP provides users with both a CLI tool and a simple REST API to perform complex administration tasks.

In this article, we will use the EAP CLI to deploy the helloworld-html5 Application on the secondary-server-group.

Continue reading “JBoss EAP 7 Domain deployments – Part 3: Domain deployment with Common Language Interface CLI.”

Share
Offline CLI with JBoss EAP 7

Offline CLI with JBoss EAP 7

Over the years, I’ve come across many command line interfaces (CLI) to larger applications, each with varying levels of access and power. Having a CLI at all is a great first step for an application, as it opens up a much wider range of possibilities: administration, extension, and trust.

CLIs also promote scriptability – the ability to create and maintain repeatable scripts, and the easier it is to develop said scripts, the better. Sometimes scripts can solve issues that developers of the app never thought of. (Pro tip: find good user experience designers who know the product and are comfortable on the command line, then put them in charge of the CLI user experience. Your users will love you.

Continue reading “Offline CLI with JBoss EAP 7”

Share