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How To Reuse Your Ansible Roles To Build Docker Images With Packer

In this article, I will show you how to reuse your Ansible roles to build Docker images using Packer.
If you are like me, you have probably used Ansible for a while. You probably have Ansible roles that you use to install and manage software on-premise and VM. Now you want to reuse those roles to build your own custom Docker images to use for development, testing, or production.

This is possible and very useful with minor changes to the Ansible roles. In fact, with Docker, you start with a very minimalistic environment and you can't take for granted some components that you will find preinstalled on major Linux distros.

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Continuous Profiling in Kubernetes Using Pyroscope

Developers typically need to look at performance bottlenecks in production applications to determine the cause of the problem. To do this, you usually need information that can be collected through logs and code tools. Unfortunately, this approach is usually time-consuming and does not provide enough details about the underlying problem.

A modern and more advanced approach is to apply and use profiling techniques and tools that highlight the slowest application code, that is, the area consuming most of your resources.

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Using LoopBack Connectors With IBM App Connect Enterprise

IBM® App Connect Enterprise provides a LoopBackRequest node, which enables you to issue synchronous requests to backend data sources by using LoopBack® connectors such as MongoDB, Cloudant®, or PostgreSQL.

In this article, we provide detailed information on the installation and configuration of the required LoopBack® connectors for use with IBM® App Connect Enterprise in container-based deployment in Cloud Pak for Integration. We will primarily cover Cloudant and CouchDB databases; however, a similar technique can be applied to other databases like MongoDB and PostgreSQL.

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How to Create a Development Environment on Alpine Linux

Alpine Linux has gained great popularity in recent years and is probably the most favored Linux for Docker. Originally designed for routers, it is a secure, fast, feather-light Linux: a basic Alpine base image takes as little as 5 MB, orders of magnitude less than other popular Linux distros. That fact makes it an ideal choice as the base system of Docker images, where small size is desirable, and specifically for OpenJDK Docker images that otherwise take up several hundred MBs.

In this post, I’ll cover my experience in setting up an Alpine Linux workstation for C++ and Java development, with some hopefully useful Alpine know-hows, tips and resources.

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Understanding Docker Concepts

Hey guys,

As a fresher, I faced a lot of challenges understanding docker concepts like how docker containers work and what they actually are. But as I grew and practiced Docker and its concepts I understood their actual meaning and how they form and how they actually are managed. Through this above video, I have tried my level best to give it a try to make you guys understand what docker container actually means and some basic docker command to shoot. Please avoid the audio quality as I made the entire video with minimum equipment. 

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Docker Images and Containers

When we work with Docker, it is important to have basic knowledge of docker images and containers. Docker containers are created using docker images. We are going to look into basic commands to create docker containers using images.

Docker Image

An image is a read-only template with instructions for creating a Docker container. It is a combination of file system and parameters. Often, an image is based on another image with some additional customization.
We can use existing images or create our own images.