Aliyah  Murray

Aliyah Murray

1625104500

How to Install Jenkins on Docker | Jenkins Docker in Docker #17

Bu videoda Docker üzerinde Jenkins’i bir Container olarak çalıştırmayı öğrendik. Jenkins kurulumu yapılırken nelere dikkat etmek gerektiğinin altını çizdik. Özellikle Jenkins dokümanı içerisinde açıklama olarak bulunmayan “DockerInDocker” kavramını da açıklayarak videoya devam ettik.

In this video, we learned how to run Jenkins on Docker as a Container. We highlighted what should be considered when installing Jenkins. We continued the video by explaining the concept of “DockerInDocker”, which is not included in the Jenkins document as a description. The solution to the problem below is explained in the video.

Hatanın çözümü videoda belirtilmiştir.;
touch: cannot touch ‘/var/jenkins_home/copy_reference_file.log’: Permission denied
Can not write to /var/jenkins_home/copy_reference_file.log. Wrong volume permissions?

#dockertutorial #whatisdocker #jenkinscontainer

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#jenkinscontainer #whatisdocker #dockertutorial

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Buddha Community

How to Install Jenkins on Docker | Jenkins Docker in Docker #17
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

Jenkins Is Getting Old — It’s Time to Move On

By far, Jenkins is the most adopted tool for continuous integration, owning nearly 50% of the market share. As so many developers are using it, it has excellent community support, like no other Jenkins alternative. With that, it has more than 1,500 plugins available for continuous integration and delivery purposes.

We love and respect Jenkins. After all, it’s the first tool we encountered at the beginning of our automation careers. But as things are rapidly changing in the automation field, Jenkins is** left behind with his old approach**. Even though many developers and companies are using it, most of them aren’t happy with it. Having used it ourselves on previous projects, we quickly became frustrated by its lack of functionality, numerous maintenance issues, dependencies, and scaling problems.

We decided to investigate if other developers face the same problems and quickly saw the need to create a tool ourselves. We asked some developers at last year’s AWS Summit in Berlin about this. Most of them told us that they chose Jenkins because it’s free in the first place. However, many of them expressed interest in trying to use some other Jenkins alternative.

#devops #continuous integration #jenkins #devops adoption #jenkins ci #jenkins pipeline #devops continuous integration #jenkins automation #jenkins scripts #old technology

August  Murray

August Murray

1615016400

Docker: Installing Docker and Understanding basic docker commands

Now since we have understood the basic architecture of Docker in my previous tutorial titled Docker: Understanding Docker Architecture and Components, lets now learn how to install Docker and run some basic commands.

Pre-requisites

  1. For our demonstration, we will be using centos-07.
  2. We will be using 1 machine for our lab with the below IP details:

192.168.33.61 docker.unixlab.com

3. The memory should be at least 2 GB and there should be at least 2 core CPU.

Understanding Basic docker commands:

The First thing we are going to do is to run the **“docker run hello-world” **command.

This command tries to find the “hello-world” image locally and if not found, it then downloads an image from the docker hub and runs the container out of this image.

#automation #containerization #docker-container #docker #docker-image

Docker Architecture Overview & Docker Components [For Beginners]

If you have recently come across the world of containers, it’s probably not a bad idea to understand the underlying elements that work together to offer containerisation benefits. But before that, there’s a question that you may ask. What problem do containers solve?

After building an application in a typical development lifecycle, the developer sends it to the tester for testing purposes. However, since the development and testing environments are different, the code fails to work.

Now, predominantly, there are two solutions to this – either you use a Virtual Machine or a containerised environment such as Docker. In the good old times, organisations used to deploy VMs for running multiple applications.

So, why did they started adopting containerisation over VMs? In this article, we will provide detailed explanations of all such questions.

#docker containers #docker engine #docker #docker architecture

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