Learn FISSION with Real Code Examples
Updated Nov 25, 2025
Architecture
Fission CLI/Controller manages functions
Function pods run dynamically on Kubernetes nodes
Pool manager pre-warms function pods
Triggers invoke functions via Controller or Router
Supports scaling based on demand
Rendering Model
Event or HTTP request -> Fission Router
Router forwards to function pod managed by Pool Manager
Function executes and returns result
Response sent back to client or event destination
Pool Manager maintains pre-warmed pods to reduce latency
Architectural Patterns
Function-as-a-Service
Event-driven triggers
Pool manager for cold-start optimization
Kubernetes-native deployment and scaling
Integration with external services via triggers
Real World Architectures
Serverless REST API backend
Event-driven ETL pipeline
Cron-based batch processing
IoT event ingestion
Microservice orchestration via functions
Design Principles
Serverless FaaS model
Kubernetes-native
Event-driven architecture
Automatic scaling and load balancing
Minimal configuration and developer-friendly CLI
Scalability Guide
Use Pool Manager to pre-warm function pods
Deploy multiple replicas for high demand
Leverage horizontal scaling of Kubernetes nodes
Monitor triggers and function performance
Integrate with load balancers for HTTP endpoints
Migration Guide
Adapt from traditional microservices by wrapping code into functions
Replace cron jobs and MQ consumers with Fission triggers
Refactor stateful logic to stateless functions
Test each function independently
Leverage Kubernetes secrets and services