Docker_Dev

This is the documentation of my lab results when learning about the docker compose

Docker is one of the tools to use containers, what is containers ? containers is

a lightweight, stand-alone, executable package of a
piece of software that includes everything needed to
run it: code, runtime, system tools, system libraries,
settings.

Why using Docker ?

lightweight

• Containers running on a single machine share that machine's operatng system kernel; they start instantly and use less compute and RAM.
• Images are constructed from flesystem layers and share common fles. his minimizes disk usage and image downloads are much faster.

Standard

• Containers are based on open standards and run on all major Linux distributons, Microsof Windows, and on any infrastructure including VMs, bare-metal and in the cloud.

Secure

• Docker containers isolate applicatons from one another and from the underlying infrastructure. Docker provides the strongest default isolaton to limit app issues to a single container instead of the entre machine.

For comparison with Virtual machines as we have used, we can see the following picture :

for full documentation, access this

Let's Hand on

Requirements:

• Virtual Machine with Linux Or Windows (sample using ubuntu 16.04)
• Internet connection
• Requires enthusiasm and patience

Installation

1. Using Ubuntu

sudo apt -y install docker.io
sudo systemctl status docker

2. Using CentOs

yum -y install docker

3. Using Windows and Mac

• Download File installer this

4. Verify Docker install

docker --version
docker version
docker info

Simple Lab

1. First Applicatons

docker run hello-world
#list images
docker image ls
#show list Container active or inactive
docker container ls -a

2. Try another application

docker run docker/whalesay cowsay nameapp
#show image list
docker image ls

Other images, you can see on this