Month: August 2021

Docker Storage Basics File System When you install Docker on a host, it automatically creates a directory: /var/lib/docker. This becomes the default file path for the storage of Docker files and objects. The directory has subfolders such as aufs, containers, images, volumes, and more. Files related to images are stored in the images subfolder, while…

Docker Daemon Security Security within the IT landscape is as critical as maintaining a strong armed-force for a country. To ensure that the IT landscape of an organization is secured from external threats, organizations lay heightened emphasis to avoid security attacks that can potentially bring down business operations within days. Without ensuring your Docker Daemon…

Introduction to Docker Networking Default Networks When you install Docker on a host machine, it automatically creates 3 types of networks: none, bridge, and host networks. The Bridge network is the default network that Docker attaches to containers once they are created. This is a private internal network, whose IP address is typically 172.17.0.1, and…

Introduction to the Docker Engine In this section, we introduce the Docker Engine, including its architecture, installation, and configuration. We will then go through basic container operations, then finally explore various ways of configuring and troubleshooting the Docker Daemon.  Docker Engine Architecture Docker was first released for public use in 2013. The first release of…

We use images in Docker to package, share and transport applications and preconfigured server environments. An image is, in essence, a template that contains the set of instructions we use to create and run containers on the Docker platform. This section tackles the operations involved in creating, running, and managing images in Docker. The Docker…

Introduction to Kubernetes Kubernetes is the most popular container orchestration tool that integrates seamlessly with Docker. The DCA certification test emphasizes specifically on services, architecture, and commands used in Kubernetes, so it is crucial to develop a firm grasp of the framework. The Kubernetes section of the DCA exam preparation tutorials combines the Kubernetes for…

Introduction to Container Orchestration An essential part of preparing for the Docker Certified Associate (DCA) exam is to familiarize yourself with Container Orchestration. Container Orchestration requires a set of tools and scripts that you can use to host, configure, and manage containers in a production environment.  Deploying in Docker typically involves running various applications on…