Docker is a frontier technology for DevOPs who spend a large amount of their time maintaining applications running on multiple geo-graphically distributed servers. Docker offers features to compose the applications in a single package and allow DevOPs engineer to control these applications' status right away.

1. Md. Armanuzzaman
Akhter Al Amin
Md. Shakil Zaman
Docker container basics and efficacy of
Kubernetes regarding container
management

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What is ?
image source: https://www.researchgate.net/publication/318816158_An_Introduction_to_Docker_and_Analysis_of_its_Performance

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Docker Components
Docker
Docker Client and
Server
Docker Images
Docker Container
Docker Registries

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Docker Architecture
Docker Networking
image source: https://docs.docker.com/engine/docker-overview/

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Example Dockerfile

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What if we have Microservice system like this?
For n number of
μ-service container, I
have to run and stop
containers by hand?
Container 1
Container 2
Container 3

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Docker Compose
One YML file solves multi container problem
Compose files typically are like this:
version: '3'
services:
service 1:
build: .
ports:
- "5000:5000"
service 2:
build: .
ports:
- "5001:5001"
redis:
image: "redis:latest"
rabbitMQ:
image:"rabbitMQ:latest"
Service based
Scaling problem
fixed….

9. Docker Swarm
image source: https://hackernoon.com/docker-swarm-kubernetess-clever-little-borther-49ac3d0a853

10. Features of Docker Swarm
• Cluster management integrated with Docker Engine
• Decentralized design
• Scaling
• Desired state reconciliation
• Load balancing
• Secure by default

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Dockerhub
These are the
steps of
deployment cycle
where Dockerhub
comes into play
image source: https://trishnag.wordpress.com/2016/04/28/publish-docker-image-with-automated-build/

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Virtual Machine vs Docker
Virtual Machine Docker
image source: https://nickjanetakis.com/blog/comparing-virtual-machines-vs-docker-containers

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Advantage of Docker Container
● Speed
● Portability
● Scalability
● Rapid Delivery
● Density

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Disadvantage of Docker Container
● Security concern
● Dependency on Operating system
● Not compatible with older machines
● Difficult to manage

15. Kubernetes
• Cluster management Tool
• Decentralized design
• Scaling
• Desired state reconciliation
• Load balancing
• Secure by default
Isn’t this the same
thing we saw for
Docker Swarm?

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Yes it is...
▪ Robustness, Maturity and Community Support
▪ Autoscaling
▪ Self healing
▪ GUI available
▪ Built-in Logging and Monitoring tool
▪ Example: Pokemon Go saved by K8s

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References
[1] Joy, A. M. (2015). Performance comparison between Linux containers and virtual machines. Paper presented at the Computer Engineering
and Applications (ICACEA), 2015 International Conference on Advances in.
[2] Russell, B. (2015). Passive Benchmarking with docker LXC, KVM & OpenStack.
[3] Scheepers, M. J. (2014). Virtualization and containerization of application infrastructure: A comparison.
[4] Turnbull, J. (2014). The Docker Book: Containerization is the new virtualization.
[5] Docker official Documentation
[6] https://geekflare.com/docker-architecture/