Docker creating an image | Build and run your image | Docker Fundamentals

Docker create an image from a container | Creating your own image | How to create Docker Image from a Container and Dockerfile.

#docker #image #dockers

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Docker creating an image | Build and run your image | Docker Fundamentals

Docker creating an image | Build and run your image | Docker Fundamentals

Docker create an image from a container | Creating your own image | How to create Docker Image from a Container and Dockerfile.

#docker #image #dockers

I am Developer

1597647163

Laravel 7/6 Create Thumbnail from Image | Intervention Image Thumbnail

Laravel create thumbnail from image. Here, i will show you how to upload image and create thumbnail of uploaded image in laravel using intervention package.

Also using laravel intervention image thumbnai, you can resize the image size in laravel.

Laravel intervention image upload with Thumbnail and save to storage

  1. Install Laravel App
  2. Setup Database
  3. Install laravel intervention image thumbnail
  4. Generate migration file and model
  5. Make Route For Save and Display Image And Thumbnail
  6. Create Controller For Store Image & Thumbnail
  7. Create Blade View
  8. Make Folder
  9. Start Development Server

https://www.tutsmake.com/laravel-intervention-image-upload-using-ajax/

#laravel intervention image thumbnail #laravel create thumbnail from image #create thumbnail of image laravel 7/6 #laravel 7. x and 6. x - image upload with create thumbnail image

Docker manifest - A peek into image's manifest.json files

docker manifest – An experimental feature !

The image manifest provides a configuration and a set of layers for a container image.

This is an experimental feature. To enable this feature in the Docker CLI, one can edit the config.json file found in ~/.docker/config.json like :

{
        "auths": {
                "https://index.docker.io/v1/": {
                        "auth": "XXXXXXX"
                }
        },
        "HttpHeaders": {
                "User-Agent": "Docker-Client/19.03.8 (linux)"
        },
        "experimental": "enabled",
        "debug": true
}

What is ‘docker manifest’ ?

The docker manifest command does not work independently to perform any action. In order to work with the docker manifest or manifest list, we use sub-commands along with it. This manifest sub-command can enable us to interact with the image manifests. Furthermore, it also gives information about the OS and the architecture, that a particular image was built for.

A single manifest comprises of information about an image, it’s size, the layers and digest.

A manifest list is a list of image layers (manifests) that are, created by specifying one or more image names. It can then be used in the same way as an image name in docker pull and docker run commands.

Commands to get started with :

After enabling this feature, one would be able to access the following command :

docker-manifest-enter image description here

These commands are easy to use. It basically avoids the need for pulling and running and then testing the images locally, from a docker registry.

Next, to inspect an image manifest, follow this syntax,

 docker manifest inspect image-name

enter image description here

.

#devops #docker #devops #docker #docker learning #docker-image

Iliana  Welch

Iliana Welch

1595249460

Docker Explained: Docker Architecture | Docker Registries

Following the second video about Docker basics, in this video, I explain Docker architecture and explain the different building blocks of the docker engine; docker client, API, Docker Daemon. I also explain what a docker registry is and I finish the video with a demo explaining and illustrating how to use Docker hub

In this video lesson you will learn:

  • What is Docker Host
  • What is Docker Engine
  • Learn about Docker Architecture
  • Learn about Docker client and Docker Daemon
  • Docker Hub and Registries
  • Simple demo to understand using images from registries

#docker #docker hub #docker host #docker engine #docker architecture #api

August  Murray

August Murray

1615158300

Tips for Optimizing Docker Builds

In this post, I’m going to address a few often-overlooked concepts that will help with optimizing the Docker image development and build process.

Docker images are used as the primary image in the Docker executor. They are the blueprints for containers, providing the instructions for how a container is spawned. In this post, I’m going to address a few often-overlooked concepts that will help with optimizing the Docker image development and build process.

How Do You Build a Docker Image?

Let’s start with a brief description of the Docker build process. It is a process triggered by running the docker build command using the Docker CLI tool.

The docker build command builds a Docker image based on the instructions specified in a file known as a Dockerfile. The Dockerfile is a text document that contains all the ordered commands a user would call on the command line to assemble an image.

A Docker image consists of read-only layers. Each layer represents a Dockerfile instruction. The layers are stacked, and each one is a delta of the changes from the previous layer. I think of these layers as a form of cache. Updates are only made to the layers that change versus updating every layer on every change.

The example below depicts the contents of a Dockerfile:

Each instruction in this file represents a separate layer in a Docker image. Below is a brief explanation of each instruction:

  • FROM creates a layer from the ubuntu:18.04 Docker image
  • COPY adds files from your Docker client’s current directory
  • RUN builds your application with make
  • CMD specifies what command to run within the container

These four commands will create layers in Docker images when they are executed during the build process.

If you’re interested in learning more about images and layers, you can read about them here.

#cloud #docker #docker image #image building