CNCF Hyderabad Meetup: Getting Started with Tekton

https://medium.com/@_nancychauhan/adopting-tekton-cloud-native-ci-solution-67fb229f4992

1. Getting Started with Tekton Nancy Chauhan Software Developer @Grofers H Y D E R A B A D
2. © 2020 Cloud Native Computing Foundation 2 $ whoami • Developer @Grofers • Loves to make cool things ranging from hardware to infra. • Blog: nancychauhan.in • Speaks her mind at @_nancychauhan(Twitter Handle)
3. © 2020 Cloud Native Computing Foundation 3 Agenda • What is Cloud Native CI/CD • Containers and CI/CD • Kubernetes and CI/CD • Tekton • Tekton triggers
4. © 2020 Cloud Native Computing Foundation 4 • Cloud computing adoption has accelerated rapidly. • Public cloud spending: $500 billion by 2023 according to IDC • Devops Culture Shift : Cloud Native
5. © 2020 Cloud Native Computing Foundation 5 What does Cloud Native mean? The Linux Foundation offers the following definition: “Cloud native computing uses an open-source software stack to deploy applications as microservices, packaging each part into its own container and dynamically orchestrating those containers to optimize resource utilization.”
6. © 2020 Cloud Native Computing Foundation 6 What is Cloud Native CI/CD?
7. © 2020 Cloud Native Computing Foundation 7 Containers Microservices in containers • Ease for building, packaging and running applications. • Fast startup times. • Saving in operational cost as compared to VMS.
8. © 2020 Cloud Native Computing Foundation 8 With the rise of containerization, both build and deployment stages in CI/CD pipelines continue to be containerized. It has led to the rise and development of various CI and CD tools for the Cloud-Native landscape.
9. © 2020 Cloud Native Computing Foundation 9 Containers and CI/CD • All dependencies you need are in container • All we need is to run the container
10. © 2020 Cloud Native Computing Foundation 10 Most popular way to go cloud native consists of Containers + Kubernetes
11. © 2020 Cloud Native Computing Foundation 11 Kubernetes • Platform for managing containers • Better use of resources – Scaling up and down while demand – Serverless models mean you only pay for compute you need • Standardisation
12. © 2020 Cloud Native Computing Foundation 12 Kubernetes and CI/CD While running CI/CD pipelines in Kubernetes, some of the challenges we are going to face are: 1. Images instead of binaries 2. Clusters: Many environments 3. Microservices instead of monoliths (Managing dependencies between all services is going to be challenging) 4. Ephemeral environments.
13. © 2020 Cloud Native Computing Foundation 13 Hence, we need a solution to these challenges in the form of cloud-native CI/CD tools. Some of the tools listed in the cloud-native landscape are Spinnaker, Argo CD, Tekton, and Jenkins X. Let’s take a deep dive into Tekton now!
14. © 2020 Cloud Native Computing Foundation 14
15. © 2020 Cloud Native Computing Foundation 15 Brains of CI/CD and putting it onto Kubernetes
16. © 2020 Cloud Native Computing Foundation 16 Tekton provides us with composable, declarative, reproducible, and Cloud-Native tools to easily build the pipelines. Tekton adds a few CRDs and custom resources to your Kubernetes cluster which can be used to make CI/CD pipelines.
17. © 2020 Cloud Native Computing Foundation 17 Tekton Pipelines features • Portability • Decoupled – Run pipeline with your own resources – Run a piece of pipeline ( task ) on their own • Tekton pipelines is implemented as K8s CRDs
18. © 2020 Cloud Native Computing Foundation 18 Tekton Building blocks
19. © 2020 Cloud Native Computing Foundation 19 To invoke these we have:
20. © 2020 Cloud Native Computing Foundation 20 Basic Pipeline Structure
21. © 2020 Cloud Native Computing Foundation 21 Tekton as replacement for Jenkins/Gitlab ETC • Tekton needs PipelineRun and TaskRun to execute • Tekton Events is a separate project that runs pipelines on events • Events can be webhooks, Github code push etc. • Event listeners receive webhooks and match against trigger binding. • Trigger bindings populate a pipelinerun using trigger templates
22. © 2020 Cloud Native Computing Foundation 22
23. © 2020 Cloud Native Computing Foundation 23 Advantages 1. Tekton is cloud-native, runs on an existing Kubernetes cluster. 2. Tekton provides an out-of-the-box solution for monitoring. 3. Easy to build pipeline using reusable tasks and steps.
24. © 2020 Cloud Native Computing Foundation 24 Disadvantages: 1. No out-of-the-box support for authentication. 2. Pipeline configuration is stored separately from code. To change the pipeline configuration, developers need to apply Kubernetes manifests manually.
25. Thank you H Y D E R A B A D