Docker
Docker VII: DockerFile
DockerFile Reference: https://docs.docker.com/reference/dockerfile/ Best practices for Dockerfile instructions: https://docs.docker.com/develop/develop-images/instructions/
Docker
Docker VI: Other Ways to Make Docker Images
Import from rootfs archive Format: docker import [options] <file>|<URL>|- [<repository name>[:<label>]] The tarball can be a local file, a remote web file, or even from standard input. The tarball will be expanded in the mirror / directory and submitted directly as the first layer of the mirror. Let’s say we Read more
Docker
Docker V: Customize Docker Image using Dockerfile
From the previous docker commit, we saw that customizing an image is really just customizing the configuration/files that are added at each layer. If we could write each layer of modify, install, build, and manipulate commands into a script, and use that script to build and customize the image, then Read more
Docker
Docker IV: Understand Mirror Composition with ‘commit’ command
Note: The docker commit command has some special applications beyond learning, such as saving the scene after an intrusion. However, do not use docker commit to customise images; customising images should be done using Dockerfile. Images are the foundation of containers, and every time you run docker run you specify Read more
Docker
Docker III: Image – Basic Usage
Fetch Mirrors The command to fetch an image from the Docker image repository is docker pull. the command format is: $ docker pull [options] [Docker Registry address[:port number]/] repository name[:label] The specific options can be seen with the docker pull –help command, here we talk about the format of the Read more
Docker
Docker II: Basic Concepts
Image As we all know, the operating system is divided into kernel and userspace. For Linux, after the kernel starts, it mounts a root filesystem to provide userspace support. A Docker image is the equivalent of a root filesystem. For example, the official ubuntu:18.04 image contains a complete root filesystem Read more
Docker
Install Docker Engine on Ubuntu and Set Up Auto Startup on Boot
Official Doc: https://docs.docker.com/engine/install/ubuntu/ Run the following command to uninstall all conflicting packages: for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do sudo apt-get remove $pkg; done Set up Docker’s apt repository. # Add Docker's official GPG key: sudo apt-get update sudo apt-get install ca-certificates curl sudo install -m Read more
Backend Development
Docker(IV) – Deploy a simple project
I have a directory ‘hello-docker’ as our project. And I’ll create a file ‘app.js’ in it with following cods. Now, let’s write our Dockerfile, which contains the instructions for packaging our application. Typically, we start from a base image. This base image has a bunch of files. We are going Read more
Backend Development
Dockers(III) – Docker Workflow
There is an application. We take this application and dockerize it, which means we make a small change so that it can be run by Docker. How? We just add a docker file to it. A docker file is a plain text file that includes instructions that docker uses to Read more
Backend Development
Docker(II) – Install Docker
Download Docker Download Docker on https://docs.docker.com/get-docker/ 2. Install WSL2 Open Powershell as administrator and enter: Download the Linux kernel update package Set WSL 2 as the default version: 3. Install Linux distribution Open the Microsoft Store and select your preferred Linux distribution. 4. Restart Restart your computer and open Docker. Read more