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
Docker I: What is Docker and Why Docker?
What is Docker? Docker was originally started as an internal project by dotCloud founder Solomon Hykes while he was in France. It is based on years of innovation in dotCloud’s cloud services technology and was open-sourced under the Apache 2.0 licence in March 2013, with the main project code maintained 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…