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Docker containers are designed to be disposable and easily replaceable. Therefore, whenever the base image of a container receives an update, we should pull the updated image and start a new instance of the container. This article will disc...

Every service container in Docker joins the default network. Other containers on that network can access it, and they can discover it using the hostname that is the same as the container name. This article will discuss adding hostnames to o...

Environment variables are provided to applications in the form of key-value pairs. We can think of these variables as metadata that provides information to configure or run an application. For example, when developing an application that in...

In Docker, there are multiple ways to check the status of a container. When displaying this information, we can also check if the Docker container is running. This article will discuss the commands to check if a Docker container is running....

Docker provides some commands that we can use to restart the container when it is stopped while it was previously running in the background. In this article, we will learn how to restart a docker container with an Nginx server running in th...

In this article, we will understand the difference between containers and images by showing the components that make up containers and images and the features that make them different. Understanding Docker layers To create a custom image, w...

Docker provides us with some useful commands that we can use to manage our images and containers, but some commands are not obvious. For example, we can use the Docker command docker ps to display a list of running containers, or use the do...

A container is a running version of our application, and critical information is only accessible when the container is running. For example, we might want to know where the logs for a container are stored. To do this, we have to enter the r...

IP address refers to Internet Protocol address, a numerical value with the syntax 192.168.0.1. IP address uniquely identifies a device connected to a network, and it also helps us access applications running on different devices on the inte...

Before we implement our application, we need to understand the difference between Dockerfile and compose.yaml files. When creating a custom image for our application, we typically use a file called a Dockerfile and docker run run the contai...

By default, a single network is created by Docker Compose in our application and each container is added there as a service. Every container on the network can be accessed and found by containers on the single network. We can configure our...

Logs are information recorded by the application when a specific event or state occurs. They help us monitor the application and take necessary actions. For example, when we deploy an application to a production environment, logs can help u...

Docker containers work by leveraging network drivers that are created during the installation of Docker. The default drivers available to us include bridge and host networking. When we create containers without specifying a network, they ar...

Docker makes it easier for developers to build, test, and deploy applications without worrying about dependencies by packaging them in standardized units called containers. Docker-compose is an advanced, must-have tool for managing multi-co...

After several iterations, Docker Registry was upgraded from version 1 to version 2. Especially being new, some commands needed to be included or adequately documented on its official documentation website. An example is getting a list of im...