Docker - DevOps Blog

Docker

A collection of 51 posts

10 Essential DevOps Tools You Should Learn in 2024

10 Essential DevOps Tools You Should Learn in 2024

The DevOps landscape is constantly evolving, with new tools and technologies emerging at a rapid pace. If you visit the DevOps roadmap on roadmap.sh, a popular site that provides developer roadmaps, you'll come across a diagram outlining the tools and technologies used in DevOps. The sheer number

CNCF Tool Interview Series(Episode 04): Docker

CNCF Tool Interview Series(Episode 04): Docker

The Interview Interviewer: Welcome back to our CNCF Tool Interview Series Episode 04, where today we're setting sail with Docker, a name that's synonymous with container technology in the cloud-native world. Docker has not only simplified the development process but has also been a cornerstone in

How Dockerfile Works

How Dockerfile Works

A Dockerfile is a text file that contains instructions on how to build a Docker image

Where Docker Images are Stored

Where Docker Images are Stored

One question that often arises for both newcomers and seasoned Docker users alike is: "Where are Docker images stored?" Understanding the storage location of Docker images is crucial for managing disk space and optimizing Docker performance. Whether you're running Docker on macOS, Windows, or Linux, this

Docker Compose Command Not Found: 3 Possible Causes & Fixes

Docker Compose Command Not Found: 3 Possible Causes & Fixes

While using Docker Compose, one error that you might encounter is: "Docker Compose Not Found". This error might seem daunting at first glance; however, it usually points to a few common issues that are relatively straightforward to resolve. In this blog post, we'll explore three common

How to Fix Docker Build Requires Exactly 1 Argument

How to Fix Docker Build Requires Exactly 1 Argument

In this blog post, we'll discuss what causes the docker build requires exactly 1 argument” error and how to resolve it.

Docker Build Args: What Are They and How to Use Them

Docker Build Args: What Are They and How to Use Them

While building Docker images, there are times when you might need to customize various aspects of the build process. This could involve choosing specific versions of software, enabling or disabling features, or adjusting other build-time configurations to suit your needs. This is where Docker build args come into the picture.

How Kubernetes Works with Docker

Demystifying Container Orchestration: How Kubernetes Works with Docker

As a developer, you've probably heard of application containerization. Containers provide a lightweight and isolated runtime that ensures applications inside them run consistently across different environments. But as the number and complexity of containerized applications grow, so do the challenges of managing them. How do you ensure that

Kubernetes vs. Docker Swarm

Kubernetes vs. Docker Swarm: A Comprehensive Comparison (2023)

Containers make application deployment and scaling easy and fast, and that makes them a perfect fit for modern applications. To get the most out of containerization, you need a good container orchestration tool. Currently, two of the most popular orchestration tools are Kubernetes and Docker Swarm. In this article, we

How to Clear Docker Logs for a Container

How to Clear Docker Logs for a Container

When Docker containers run, they continuously generate log entries, recording everything from system errors to operational information. These logs are essential for troubleshooting and monitoring the health and performance of containers. However, without proper management, these log files can grow to consume significant disk space, potentially leading to issues with

How to Keep Docker Container Running

How to Keep Docker Container Running

Docker containers are generally designed to run a specific task or process and will remain active for the duration of that process. When the process finishes, the container exits. However, there are scenarios where you might want to keep the Docker container running indefinitely. This could be for debugging, development,

Introduction to DevOps Tools: From Idea to Execution

Introduction to DevOps Tools: From Idea to Execution

Welcome to the world of DevOps, where a plethora of tools like Docker, Kubernetes, Ansible, Terraform, Git, GitHub, Jenkins, Prometheus, and Grafana play pivotal roles. For anyone new to this domain, the sheer number of tools and technologies can be overwhelming. This blog aims to demystify these tools by narrating

3 Best Ways to Run Docker in Docker Container

3 Best Ways to Run Docker in Docker Container

Docker is a popular tool for building, running, and managing containers. But what if you want to run Docker inside a Docker container, for instance, in a CI pipeline? How can you achieve that? In this article, I will show you three different methods to run Docker in a Docker

How to Build a Docker Image With Dockerfile From Scratch

How to Build a Docker Image With Dockerfile From Scratch

Containers have become the preferred method for packaging and deploying applications in modern software development. Among container platforms, Docker has emerged as the most popular choice for building and managing these containers. Before we can run an application as a container using Docker, we must first build a Docker image.

How to Pass Environment Variables to Docker Containers?

How to Pass Environment Variables to Docker Containers?

Containerized applications can run seamlessly across a variety of environments, including development, testing, and production. As these applications move from one environment to another, they often require some configurations to be adjusted to meet each environment's unique needs. For example, in a development environment, enabling verbose debugging can

How to Use Docker CP Command With Examples?

How to Use Docker CP Command With Examples

In Docker, the docker cp command is a powerful tool that provides a way to copy data in and out of a container. This makes it useful for performing tasks such as debugging and data backup. In this blog post, we'll explore how to use the docker cp

Why and How to Tag a Docker Image?

Docker Image Tag

Why and How to Tag a Docker Image?

Learning to properly tag Docker images in a production environment is crucial. Meaningful and consistent image tags not only help users easily identify and select the appropriate image versions for their needs but also enhance clarity and streamline workflows within the team. In this blog post, we’ll learn why

Docker Entrypoint vs CMD: What Is the Difference and How to Choose?

Docker Entrypoint vs. CMD: What Is the Difference and How to Choose?

Docker is a platform that lets us run and manage applications inside containers. Before we can run an application inside a container, we must create a Docker image of the application using Dockerfiles. A Dockerfile is a text file containing instructions that Docker executes to create the image. Each instruction

How to Remove Unused and Dangling Docker Images?

How to Remove Unused and Dangling Docker Images

A Docker image is a static file that contains everything needed to run an application, including the application code, libraries, dependencies, and the runtime environment. In this blog post, we’ll learn how to remove unused and dangling Docker images. But first, let’s understand what they are. What Is

How to Create Docker Image From a Container?

How to Create Docker Image From a Container

Docker is a platform that helps run applications inside containers. One of its powerful features is that you can create custom Docker images from containers. Now, you might be wondering, why bother creating an image from a container when you can just use Dockerfiles? One important reason is when you

How to Get Docker Container IP Address From the Host?

How to Get Docker Container IP Address From the Host

In this blog post, we’ll explore various methods for finding the IP address of a Docker container that was started with the default container networking. When we say that a container was started with the default container networking, it means that the container is using the built-in Docker networking

How to Create Docker Images?

How to Create Docker Images?

App deployment has become easier because of containerization. But what is containerization? Let's understand it using an example. Think of a laptop box. It contains a laptop, a charger, a power cable, and a battery. The laptop is dependent on the charger and its accessories. This box has

What's new in Docker + Wasm Technical Preview 2?

What's New in Docker + Wasm Technical Preview 2

Back in October 2022, the Docker organization had some pretty exciting news. They released a technical preview of Docker Desktop that had a new ability: to run Wasm bytecode. At the end of March 2023, we got another interesting release: Docker + Wasm Technical Preview 2. Let's see what

What Is Containerization?

What Is Containerization?

Containerization is a modern technology that has drastically transformed the software deployment process. It involves packaging software applications and all their dependencies into a single, self-contained unit known as a container. What is a container? A container is a package containing all the necessary dependencies required to run an application.