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Serverless for the Cloud Native Era with Fission
1. Serverless for the
Cloud-Native Era
Event-driven processing with Fission, NATS, and Kubernetes
Soam Vasani
Software Engineer
Platform9 Systems
2. Fission Functions
● Easy lightweight services on Kubernetes
● Fast cold-starts using pools of ready containers
● Lots of languages supported (JS, Python, Go, Ruby, and lots more)
● Invoke functions using various triggers
○ HTTP for synchronous invocations
3. Fission and NATS
● Fission supports NATS
Streaming triggers
● Reliable Async Function
invocation using NATS
Streaming
● Request / Response
channels
4. Event-driven Function Systems
● Chain together functions
using channels managed by
a single NATS-Streaming
deployment
● This lets you compose
functions together in
powerful ways
5. Ops: Difficult in event driven systems
● Monitoring and Performance?
○ How can you tell how long a whole “workflow” takes?
● Upgrades
○ Upgrading without disruption in a complex system
○ What are the compatibility constraints?
● Cancellation, Restarts, Tracing, etc.
6. Workflows: “Managed” event driven systems
● Create “flowcharts” of function
● Specify dataflow and control flow
● Workflow engine abstracts away communication