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Design Patterns for Pods and Containers in Kubernetes - Webinar by zekeLabs
The document provides an overview of design patterns for pods and containers in Kubernetes, detailing prerequisites, patterns such as sidecar, ambassador, and adapter, as well as their use cases. It also covers multi-pod application patterns including leader-follower, work-queue, and scatter-gather patterns, along with Kubernetes features like init containers and lifecycle hooks. For further information, the document encourages contacting Zekelabs to assist in upskilling employees in the IT industry.
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Design Patterns for Pods and Containers in Kubernetes - Webinar by zekeLabs
- 1. zekeLabs Learning made Simpler! www.zekeLabs.com Please find webinar recordings on www.edYoda.com
- 2. Design Patterns forPods and Containers on Kubernetes info@zekeLabs.com | www.zekeLabs.com | +91 7032051637
- 3. ● Knowledge aboutDocker containers ● Basic knowledge of Kubernetes ● Basic knowledge of Microservices Our previous webinars: Introduction to Docker https://www.edyoda.com/course/1414?episode_id=728 Microservices using Kubernetes https://www.edyoda.com/course/1414?episode_id=2433 Prerequisites
- 4. ● Single-Pod Multi-ContainerApplication Pattern ● Multi-Pod Application Pattern ● Kubernetes provided features: ○ InitContainer ○ LifeCyclehook: PostStart ○ LifeCyclehook: PreStop Agenda
- 5. ● Bounded Context ●Reusable Docker images ● Scalable at the Pod level ● App image shall have only the core logic ● Immutable Docker images Design Goals of Pods and Containers
- 6. ● Sidecar Pattern ●Ambassador/Proxy Pattern ● Adapter Pattern Single-Pod Multi-Container Application Pattern
- 7. 1. Sidecar pattern ApplicationPod Main Application Container Volume Sidecar Container
- 8. 1. Sidecar pattern ApplicationPod Web Server Container /var/log Log Rotating Container
- 9. ● Log Rotator ●Maintenance applications ● Content update ● Tightly coupled functionalities Use cases of Sidecar Pattern
- 10. 2. Ambassador pattern Service1 Service 2 Service 3 Application Pod Application Container Proxy Ambassador Container
- 11. ● Network Proxies ●Service Mesh ● Automatic Retries and Fault tolerant application ● Client-side service discovery Use cases of Ambassador Pattern
- 12. 3. Adapter pattern ApplicationPod Application Container Adapter Container Centralized Monitoring System
- 13. ● Monitoring toolssuch as Prometheus ● Translator Containers ● To make applications platform-agnostic Use cases of Adapter Pattern
- 14. ● Leader-follower Pattern ●Scatter-gather Pattern ● Worker-Queue Pattern Multi-Pod Application Pattern
- 15.
- 16. 1. Usecases ofLeader-Follower pattern ● Cluster-aware applications ● Cassandra ● etcd–clusters ● API-server in multi-master node clusters
- 17. 2. Work-Queue Pattern ApplicationPod Work Execution Framework Container Application Container Application Pod Work Execution Framework Container Application Container Work Queue Coordinator Work Queue User Work Request
- 18. 2. Usecases ofWork-queue pattern ● Data Processing Pipelines ● Asynchronous Parallel Batch Jobs ● Work-flow management
- 19. Pod 3. Scatter-Gather Pattern Pod Developer Supplied Container Framework Supplied Container UserWork Request Pod Developer Supplied Container Pod Developer Supplied Container SubQuery () SubQuery () MergeResponses()
- 20. 3. Usecases ofScatter-Gather pattern ● Map-reduce based applications ● OLAP Queries in Data warehouses ● Distributed parallel Processing of sharded databases
- 21. ○ InitContainer ○ LifeCyclehook:PostStart ○ LifeCyclehook: PreStop Special features by kubernetes
- 22. Init Containers Application Pod ApplicationContainerInit Container Core Business App Time POD Creation Request InitContainer Exited ENTRYPOINT triggered Preparation Logic
- 23. Lifecycle hooks Container Shutdown Application Pod ApplicationContainer PreStop Hook PostStart Hook Core Business App Time POD Creation Request SIGKILL Termination grace period SIGTERM
- 24. Init Containers andLifecycle hooks Container shutdown received Application Pod Application Container Init Container preStop Hook postStart Hook Core Business App Time POD Creation Request InitContainer Exited SIGKILL Termination grace period
- 25. Visit : www.zekeLabs.comfor more details THANK YOU Let us know how can we help your organization to Upskill the employees to stay updated in the ever-evolving IT Industry. Get in touch: www.zekeLabs.com | +91-7032051637 | info@zekeLabs.com