Docker is an open platform for developing, shipping, and running applications, allowing for faster and more efficient software delivery by separating applications from infrastructure. It offers advantages over virtual machines, including reduced resource usage, quicker deployment, and no need for an entire operating system to run, enhancing memory efficiency. Docker involves the use of images, containers, and Dockerfiles, streamlining the process of application management and execution.

1. Docker

2. Content
 Docker
 Virtual Machine
 Difference bw Docker and VM
 Advantage
 Docker Files
 Docker Image
 Docker Containers

3. Docker
 Docker is an open platform for developing,
shipping, and running applications.
 Docker enables you to separate your
applications from your infrastructure so you
can deliver software quickly.
 With Docker, you can manage your
infrastructure in the same ways you manage
your applications.
 Docker reduce the delay between writing code
and running it in production.

4. DOCKER ARCHITECTURE

5. Why docker?
Virtual Machine
 A virtual machine is capable of performing
tasks such as running applications and
programs
 A host can have several virtual machines
running at a specific time.
 Docker containers are much smaller and
require far fewer resources than a VM.
 The lightweight architecture of Docker
containers is less resource-intensive than

6. The docker containers are suited for situations
where you want to run multiple applications
over a single operating system

7. Difference between Docker and VM
DOCKER VIRTUAL MACHINE
Boot-Time Boots in a few seconds. It takes a few minutes
for VMs to boot.
Runs on Dockers make use of the
execution engine.
VMs make use of the
hypervisor .
Memory Efficiency No space is needed to
virtualize, hence less
memory.
Requires entire OS to be
loaded before starting
the surface, so less
efficient.
Deployment Deploying is easy as only
a single image,
containerized can be
used across all
platforms.
Deployment is
comparatively lengthy as
separate instances are
responsible for
execution.

8. Advantage
 App run separately from each other (Isolate
from each other)
 Less OS maintenance.
 Efficient.
 Fast deployment.
 Docker provides speed & efficiency over the
traditional virtualized hardware.
 Each & every separate app have their own
dependencies.

9. Example For Docker

16. How Docker Works?
Three different stages for containers working in a
dockerized environment.
 Docker Image
 Docker Containers
 Dockerfile

17. Docker Images
# docker pull nginx

18. List docker images
# docker images

19. Docker container
 Clones/Copy the above docker image and
make it as a containers which is then ready to
execute.
Create Docker Container
# docker run -d --name clx_server1 -p 80:80 nginx:latest

20. Docker container
 List running Docker containers
# docker ps
 List all Docker containers
# docker ps –a

21. Start Container
 Start a Container
# docker start clx_server1
 Stop a Container
# docker stop clx_server1

22. Docker File

23. Build Docker File
 Build docker image from Dockerfile
# docker build -t webserver .

24. Thank You