Kubernetes, serverless, and you - Knative a year later

Since launching in 2018, the Knative project has gained wide adoption and experienced rapid growth. This presentation will provide an overview of serverless, answer why Knative, and outline the “state of the project” combined with critical learnings from the last year that inform the wider serverless landscape.

Transcript

1. Kubernetes, serverless, and you Knative a year later Serverless at Google @mchmarny
2. Knative a year later ~10 months ago
3. Serverless more than Function
4. Serverless and Container
5. Serverless with Portability
6. Serverless on Kubernetes
7. 13+ Serverless Platforms
8. Serverless Platforms on Kubernetes 13x Runtimes - Build - Routing - Binding - Autoscaling - Observability - Invokers - Sources
9. duplication of efforts in difficult but common areas decreased portability Serverless Platform on Kubernetes
10. Knative open source building blocks for serverless on Kubernetes
11. Future Products Build Serving Kubernetes Events ... Knative Primitives
12. Knative Today
13. July 18 v0.1 Initial release Serving, Build Nov v0.2 Pluggable networking, autoscaling, and caching Feb v0.4 Upgradable configs Mounting Secrets GRPC, HTTP/2, WebSockets Jan 19 v0.3 Container resources spec Updated scale-to-zero strategy Cluster-local services Apr v0.5 Expanded Event API GRPC streaming Knative Momentum May v0.6 Serving Beta API Auto-TLS EventType CRD
14. 20% MoM Participation Growth >50 Companies contributing >4K Pull Requests 400+ Contributors 9 Working Groups v0.6 Released last week! Knative Community
15. Long tail of contributors drive community momentum VMware, Huawei, Cisco, TriggerMesh, Dropbox, SAP, Microsoft, Schibsted, Apache, Independent, China Mobile NTT, CloudBees, Caicloud, Inovex, Docker, Heureka, CNCF, Liz Rice, Zalando, Douyu.com, Nebula. OpsGenie. Terracotta, Eldarion, Giant Swarm, Heroku, Revolgy, SORINT.lab, Switch, Ticketmaster, Virtustream,, Alipay, Blue Box, Cruise Automation, EPAM Systems, EVRY, Foreningen Kollegienet Odense, Giddyinc, IPB, Manifold.co, Orange, Puppet, Stark & Wayne, Weaveworks, Disney Interactive, Ivx, Mediative, Ministère de l'Agriculture et de l'Alimentation, NatureServe, Samsung SDS. Typeform, Wise2c Knative contributions by company, avg % since launch Source: CNCF knative.teststats.cncf.io 4/2019 Redhat (9%) Google (61%) Pivotal (6%) IBM (4%) All others (20%) Knative Project
16. Products Google Cloud Run Red Hat OpenShift SAP Kyma Google Cloud Run on GKE IBM Cloud Kubernetes Service TriggerMesh Build Serving Kubernetes Platform Primitives Events ... Knative-based products today ...
17. Knative Overview
18. Knative Serving Benefits • Activates and scales based on request (up/down to 0) • Manages code/config revisions • Integrates well with service mesh (request path/services access control) • Supports custom domains and certificate management Pluggable • Connect with other native Cloud services like Cloud Build and Stackdriver • Extend with 3rd party integrations like GitLab and Datadog
19. # List current revisions in demo namespace (filter on service name) kubectl get revisions -n demo -l serving.knative.dev/service=mysrv NAME SERVICE NAME GENERATION READY REASON mysrv-qtz5p mysrv-qtz5p-service 2 True mysrv-vq25k mysrv-vq25k-service 3 True # List routes for specific service kubectl get routes -n demo -l serving.knative.dev/service=mysrv NAME DOMAIN READY REASON mysrv mysrv.demo.knative.tech True # Edit service route to point to specific revision # (status/traffic[n]/revisionName) kubectl edit route mysrv -n demo Knative Revision Revision 1 Revision 2 Revision 3 Configuration Route Service
20. Knative Eventing Loosely coupled • Use existing event sources available or build your own • Pluggable channel implementation (e.g. PubSub. Kafka, In-Memory) Benefits • Orchestrates on/off cluster event sources • Binds declaratively event sources, triggers, and services • Scales from just few events to live streaming pipelines • Uses standard CloudEvents
21. Name Description Apache Camel Allows to use Apache Camel components for pushing events into Knative Apache Kafka Brings Apache Kafka messages into Knative AWS SQS Brings AWS Simple Queue Service messages into Knative Cron Job Uses an in-memory timer to produce events on the specified Cron schedule. GCP PubSub Brings GCP PubSub messages into Knative GitHub Brings GitHub organization/repository events into Knative GitLab Brings GitLab repository events into Knative. GCP Scheduler Google Cloud Scheduler events in Knative when jobs are triggered GCP Storage Brings Google Cloud Storage bucket/object events into Knative Kubernetes Brings Kubernetes cluster/infrastructure events into Knative Full lists: https://github.com/knative/docs/tree/master/docs/eventing/sources Knative Event Sources
22. Knative Build Benefits • Reproducible builds • Enables source to serving URL templates • No cross-compiling toil or need for Docker locally • Cloud caching, elasticity of build resources Loosely coupled • Supports decoupled CI/CD (e.g. Cloud Build or Jenkins X) • Ecosystem for enterprise tooling to manage policy and audit builds
23. # On-cluster Build (Build Templates, Buildpacks, or github.com/tektoncd/pipeline) kubectl apply -f build.yaml # GitOps (Cloud Build or your CI/CD platform like Jenkins X) git commit # on branch triggers build for Test/QA deployment git tag/release # triggers deployment pipeline to active service # Local Build & Deploy docker build/tag/publish # uses Dockerfile Kubectl/knctl deploy --image… # github.com/cppforlife/knctl # ko for quick iteration, no Dockerfile github.com/google/ko ko apply -f config.yaml # golang only Knative Build Options
24. Infrastructure Primitives Knative Kubernetes Knative-based Products Optimized Experience Platform Usage Depth
25. Docs & Community knative.dev Quick Start bit.ly/cr-gke Source & Samples github.com/knative Have questions? knative.slack.com Anything else? @mchmarny