Docker: Installation

Installation

First you had to decide which version you need to install, like Windows or Mac

Here I will install Mac version:

1 go to docker.com and get the Stable version: https://docs.docker.com/docker-for-mac/install/#download-docker-for-mac

 

2. once download, go to Application, and click docker.dmg, then you will be start running installation

3. Once you see your docker has show on the right top menu bar, yes, that’s how easy it is, you had installed it already

 

4 open terminal, type

$docker –version

 

Once you see the version has been record, yes you are done

5 then go to top right menu Docker, right click to search Preference, here you could have further setting like start Docker as you log in or File Sharing path etc, but with Mac basically you could just leave as default setting

 

6 (Optional but recommend ) Install Kitematic, which is GUI interface allowed you easy to use Docker without typing lots command code

 

login your account docker hub

 

Then you all set, wow you have great interface to get any Docker image, container

 

So you are all done, you could use those command to check your images or containers:

$ docker images

$ docker ps -a

7 Create your first image

go to Kitematic, choice one of your image, here I tried hello-world-nginx

once created, Kitematic will pop to runing page, click web preview part

voila, how easy it is you had create your first page in your localhost:

8 Modified your first container page

stick on Kitematic, under volumes block , click right it will show the file path to running this image:

 

modified your index.html file

<p>Ok, so try out if it is working</p>

Once your process, Docker will stop running, so you just had to restart

then go to the browser check, it is had modified

 

Then type:

$ docker images

REPOSITORY                    TAG                 IMAGE ID            CREATED             SIZE

kitematic/hello-world-nginx   latest              03b4557ad7b9        2 years ago         7.91MB

You will see you had a Repository hello-world-nginx

Next, play how to install nginx web server

 

 

 

Docker introduction

As sometime we need to run the project over the Virtual Machines (server), there’s has VMware, Microsoft or any other cloud VM, for VM introduction you could see more details here, or about what use virtuabox 

And this is our founder Alex who build the dev env for php environment, you could download here and install to play with

So Docker == VM ? yes you could say so, but ! Docker === VM

Why? compare other VM container, Docker could be:

A adapte any environment, either in Windows or MAC ( this is the key point, how many developers sacrificed huge time to play around with !!!), or in cloud, dedicated or any virtue server, so it’s easy to move your project from dedicated to cloud

B Faster deployed, developer could work under the container and it is very faster and easy to deployer your project

C Easy Management, compare traditional vm, for updating job it will take lots of time and configuration, for Docker it become more easier

 

Here is funny image but quick for you to get understand :

Conception of Docker

  • Image:  like vm’s Guest OS or any env like ubuntu ( which includ Apache or any other applications), image could build Docker container

image is R\O, read only

  • Container:  create by image, each image could create serveral different containers , container could be run, start, stop and delete, when container running it will build by container layer and with R\W mode, you could take container as simple Linux env

  • Registry: it is like github, stock images as each repositories, so you could install image from pull or you could make your own image to push

 

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