Learn Fission - 9 Code Examples & CST Typing Practice Test
Fission is a serverless framework for Kubernetes that allows developers to deploy functions quickly without managing infrastructure. It focuses on fast, event-driven, and scalable function execution.
Learn FISSION with Real Code Examples
Updated Nov 25, 2025
Explain
Fission runs on top of Kubernetes, leveraging its orchestration and scaling capabilities.
Developers write functions in multiple languages (Go, Python, Node.js, etc.) and deploy them without container management.
Supports HTTP triggers, message queues, cron schedules, and Kubernetes events.
Provides automatic scaling and load balancing for functions based on demand.
Designed for microservices, event-driven workflows, and cloud-native serverless applications.
Core Features
Function-as-a-Service (FaaS) model
HTTP, message queue, and cron triggers
Pre-built language runtimes (Go, Python, Node.js, .NET, Ruby)
Cold-start optimization with pool manager
Kubernetes-native deployment and management
Basic Concepts Overview
Function - the deployed unit of code
Trigger - event source that invokes functions
Environment - language runtime for functions
Pool Manager - pre-warms pods to reduce cold starts
Router - directs requests/events to correct function
Project Structure
functions/ - function source code
environments/ - runtime definitions
triggers/ - event sources and schedules
config/ - Fission configurations
deployment scripts - optional Helm or YAML files
Building Workflow
Write function code in supported language
Create environment for the function runtime
Deploy function with `fission fn create`
Bind triggers to the function (HTTP, cron, MQ, etc.)
Test function via `fission fn test` or HTTP endpoint
Difficulty Use Cases
Beginner: single HTTP-triggered function
Intermediate: cron job or message queue trigger
Advanced: multi-language function pipeline
Expert: event-driven microservices with multiple triggers
Auditor: optimize cold-start and scaling performance
Comparisons
Fission vs AWS Lambda: Fission runs on Kubernetes, Lambda is cloud-managed
Fission vs OpenFaaS: Both serverless on Kubernetes, Fission emphasizes triggers and CLI simplicity
Fission vs Knative: Knative provides full serverless platform, Fission focuses on lightweight FaaS
Fission vs Micronaut: Micronaut is full-stack framework, Fission is function-only serverless
Fission vs Spring Boot: Spring Boot is monolithic/microservice framework, Fission is serverless functions
Versioning Timeline
2017 - Fission initial release by Platform9
2018 - Added pool manager for cold-start optimization
2019 - Added multiple language runtimes
2020 - Improved Kubernetes integration and triggers
2021-2025 - Continuous improvements, CI/CD, monitoring, and community growth
Glossary
Function - unit of serverless code
Trigger - event source invoking functions
Environment - runtime for functions
Pool Manager - pre-warms pods to reduce cold starts
Router - directs events/requests to functions
Frequently Asked Questions about Fission
What is Fission?
Fission is a serverless framework for Kubernetes that allows developers to deploy functions quickly without managing infrastructure. It focuses on fast, event-driven, and scalable function execution.
What are the primary use cases for Fission?
Serverless microservices. Event-driven functions for Kubernetes apps. REST API endpoints. Cron-based background jobs. Data processing pipelines triggered by messages
What are the strengths of Fission?
Quick deployment and scaling of functions. Kubernetes-native with minimal setup. Supports multiple programming languages. Handles event-driven workloads efficiently. Integrates with existing Kubernetes services
What are the limitations of Fission?
Requires Kubernetes knowledge. Limited ecosystem compared to AWS Lambda or OpenFaaS. Not ideal for very large monolithic apps. Cold-start latency may affect short-lived functions. Monitoring and debugging require Kubernetes tooling
How can I practice Fission typing speed?
CodeSpeedTest offers 9+ real Fission code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.