Kubernetes: https://youtu.be/KnjnQj-FvfQ
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An RSVP app designed to be deployed by the dockers on the Kubernetes Minikube Cluster. Front end with flask framework and MongoDB as a backend database. Youtube video:https://youtu.be/KnjnQj-FvfQ
![References
[1]"Compare Kubernetes vs Docker Swarm", Platform9, 2018. [Online]. Available:
https://platform9.com/blog/kubernetes-docker-swarm-compared/. [Accessed: 31- Oct- 2018].
[2]"Production-Grade Container Orchestration", Kubernetes.io, 2018. [Online]. Available: https://kubernetes.io.
[Accessed: 31- Oct- 2018].
[3]S. Ravindra, M. Fredrickson and S. Dyer, "Kubernetes vs. Docker Swarm: What’s the Difference?", The New
Stack, 2018. [Online]. Available: https://thenewstack.io/kubernetes-vs-docker-swarm-whats-the-difference/.
[Accessed: 31- Oct- 2018].
[4]"Understanding the Kubernetes Architecture with a Use-Case", Edureka Blog, 2018. [Online]. Available:
https://www.edureka.co/blog/kubernetes-architecture/. [Accessed: 31- Oct- 2018].](https://image.slidesharecdn.com/kubernetesrahul-181221061759/85/Kubernetes-https-youtu-be-KnjnQj-FvfQ-27-320.jpg)
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Kubernetes: https://youtu.be/KnjnQj-FvfQ
- 1. Kubernetes Presented by: Diana Chiu Jiayin Liu Rahul Malhotra Meet Maniar Nidhi Patel Guided by: Omar Abdul Wahab COEN 424/6313 Programming on the Cloud
- 2. Background "Google's Borg system is a cluster manager that runs hundreds of thousands of jobs, from many thousands of different applications, across a number of clusters each with up to tens of thousands of machines." - Abstarct of Google’s Borg Paper
- 3. What is Kubernetes? •The name kubernetes originated from Greek, which means “helmsman” or “Pilot.” •It is also known as K8s where K is the first character and last 8 letters are replaced by substring “ubernete”. ● Kubernetes are originally developed by Google in 2014 and now, it is a part of the Cloud Native Computing Foundation project. It is written in go language. ● It is used to group multiple containers into one unit in order to facilitate management and deployment of multiple containers.
- 4. Container Orchestration First, what is container? - One kind of way to deliver and package multiple applications with High-performing , scalable applications on any kind of infrastructure.
- 5. Need to deploy containers over cluster for large scalable applications. At production stage of the application, we need to ensure that our application should run as per following: - Fault-tolerant - On-demand scalability - Optimal resource use - Inter-application communication - Accessibility from external environment - Fast update/rollback Container Orchestration is used to meet all above requirements
- 6. Container Orchestrators Kubernetes, Docker Swarm, Amazon ECS, etc... What can a container orchestrator do? - Bind hosts to a cluster - Assign and schedule containers to run on hosts - Help communication between containers running on different hosts - Bind similar container to manage them as services - Keep track of usage and storage - Enable secure access to apps in containers Ref : https://coderise.io/wp-content/uploads/2018/01/orchestration-1073x550.png
- 7. Docker proved to be all of the following: ● Faster ● Reliable ● Efficient ● Light-weight ● Scalable But...Docker Swarm was not easily Scalable..
- 8. It was not scalable because…. ● Container could not communicate with each other ● Container had to be deployed appropriately ● Containers had to be managed carefully ● Auto scaling was not possible ● Distributing traffic was still challenging
- 9. How does Kubernetes Work https://upload.wikimedia.org/wikipedia/commons/thumb/b/be/Kubernetes.png/600px-
- 10. Master: Controls the cluster and nodes in it. Nodes: Hold the containers inside them; containers are inside separate PODS. PODS : are logical collection of containers which need to interact with each other for an application Ref : https://d1jnx9ba8s6j9r.cloudfront.net/blog/wp-content/uploads/2018/05/kubernetes-architecture- 768x345.png Wait, What are the basic components?
- 11. How should I define states of cluster?
- 12. Reference: https://www.edureka.co/blog/kubernetes-vs-docker/ One can set desired cluster using two methods: 1. Command Line Interface(CLI) -It uses kubectl to serve the purpose. 2. Kubernetes API. -It uses API directly to communicate with the cluster and set or change desired cluster sets.
- 13. All right. What is Master Node then? - API server - Controller Manager - Scheduler - etcd
- 14. API Server: is management and communication center for master node and its object such as pods, services, volumes and others. The server takes REST commands from user/operator, then executes requests Controller Manager : manages and attempting to change the current state of the cluster to the desired state Scheduler : schedules work mainly for worker nodes. The scheduler has information of workers’ resource usage and constraints. It schedules the work in terms of Pod and Service etcd : is an operator consists of key value for storing cluster states and mainly manages to maintain healthy state of the cluster
- 15. What about Worker Node? - Container runtime Executes & manages container images - Kubelet Communicates with Master Node, run containers - Kube-proxy It runs on each node and provides networking services on each node.
- 16. Kubernetes Objects • Unit of deployment, group of containers deployed on the same hostPod • Logical interface of service/microserviceService • Preserves container dataVolume • Virtual clusterNamespace
- 18. Ref: https://blog.csdn.net/M2l0ZgSsVc7r69eFdTj/article/details/79329738
- 19. Kubernetes VS Docker Swarm Similarities - Open source projects - Various storage options - Load balancing and DNS - Monitoring - Support high availability
- 20. Differences Scalability: - Kubernetes Provides strong cluster state health guarantee Slower scaling & deployment rate - Docker Swarm Deploy container faster compared to Kubernetes Fast on-demand scaling for smaller cluster
- 21. Application Definition: - Kubernetes Application deployed as pods + deployment + services Deployment replicated in multiple nodes - Docker Swarm Application deployed as services (microservices) Auto-scaling: - Kubernetes: available - Docker Swarm: Not directly available
- 22. Overall... Kubernetes: - Higher complexity, flexible but complex installation, stable support for high demand and large scale application Docker Swarm: - Simple solution for smaller scale application, quick setup
- 23. Features of Kubernetes Automatic binpacking Self- Healing Horizontal scaling Service discovery and Load Balancing Automatic rollouts and rollbacks Secrets and configuration management Storage orchestration Batch execution
- 24. Advantages of Kubernetes Deals with large data volume Auto-scaling Analyzes server load to scale up/down Logging and monitoring Quickly analyze logs to debug failures Monitoring keeps Master constantly aware of Worker Nodes health Provides GUI
- 25. Limitations of Kubernetes •Management tools need to be installed separately Complex installation and setup procedures •Newly created process takes time to initialize before becoming available to user Long process initialization & slower container management
- 26. Demo ● Please follow the link mentioned here to understand working of Kubernetes. https://www.dropbox.com/s/h67wxttmcb83kd6/final-demo-2018-11-20_01.06.20.mp4?raw=1
- 27. References [1]"Compare Kubernetes vs Docker Swarm", Platform9, 2018. [Online]. Available: https://platform9.com/blog/kubernetes-docker-swarm-compared/. [Accessed: 31- Oct- 2018]. [2]"Production-Grade Container Orchestration", Kubernetes.io, 2018. [Online]. Available: https://kubernetes.io. [Accessed: 31- Oct- 2018]. [3]S. Ravindra, M. Fredrickson and S. Dyer, "Kubernetes vs. Docker Swarm: What’s the Difference?", The New Stack, 2018. [Online]. Available: https://thenewstack.io/kubernetes-vs-docker-swarm-whats-the-difference/. [Accessed: 31- Oct- 2018]. [4]"Understanding the Kubernetes Architecture with a Use-Case", Edureka Blog, 2018. [Online]. Available: https://www.edureka.co/blog/kubernetes-architecture/. [Accessed: 31- Oct- 2018].
- 28. Thank You