Akka Cluster vs Kubernettes

Fabio - @ticofab
Adam Sandor - @adamsand0r

Reactive community vs kubernettes community

Middle meeting - Reactive Distriubted Systems
- Akka : Implementation
- Kubernetetes: Distrubtions

Questions

Can kubernetes make an reactive application?

What is resilience

Fault toleerence - Component is being hit but keeps going - possibly wiht reduced functionality
Resilience - Upon failure a component is able to reset into functional state

Akka

Reactive principles -> Reactive design patterns - Reactive building blocks [jvm/application level]
Actors gossip to each other about what/who they are
Supervisor can handle situations

Kubernettes

Container orchestration engine at heart
Has rules for what services have to be up
Reactive?
- Service abstraction + load balencing
- Simple processing requests
Pipelines?

Akka

Statemeful microservice architecture

Stateless

Sends state to a persistent store

Is akka cluster suitable for a microservice architecture?

Are actors microservices?

Yes

Actor in akka cluster & microservice on kubernettes

They all have location transparency, resilency, scalability

But they're not independently deployable.

One codebase - one cluster

All code is in one cluster
Cluster per pod

Actually seperate the code bases

Put them all in one akka cluster (communication between pods)
Mulitple webservice gateways

Seperate codebase/seperate clusters

Seperate services via clusters

How can Akka Cluster and Kubernetes Work Together?

K8s creates nodes and help form cluster?
- Membership
Akka Bootstrap (cluster registration)

Kubernettes resilency

Pod restarts based on healthchecks
- System level -Can catch non expected cases

Questions

How does kubernettes handle processing requests that require state?
Processing/clustering management vs akka
Auto scaling akka clustering based on demand?
How do you deploy new code bases to clusters (Managmenet of new code deployments/reprocessing) 4.5 Api management /akka cluster membership
Scaling down