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Agenda 2 • Who am I? • Why this talk? • Historical Timeline • What is a platform? • Technologies • Kubernetes • Cloud Foundry • Knative • Demo • Final comparison

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Novatec Cloud Consultant Stuttgart Cloud Foundry Meetup Organizer @maeddes #whoami

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Scenario Legacy Cloud SKILL? SECURITY? TECHNOLOGIES? PROVIDER?

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Offerings STRATEGY EDUCATION MIGRATION

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LXC Container/Platform history 2018 2017 2014 2013 2011 2008 1979 …. … … . chroot Cloud Foundry Virtualization and isolation in subsystems. Examples: FreeBSD Jails, Linux VServer cgroups (2007) namespaces (2002) istio knative kubernetes eirini 2020 . cf-for-k8s

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Hype & Reality

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Hype & Reality

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Apps Services Push Start/ Stop Scale Delete Routes Create/Delete Map/Unmap Create/Delete Bind/Unbind Minimal Concepts

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Deployment s Services NetworkPolici es LoadBalancer NodePort ReplicaSet StatefulSet ClusterIP Ingress Pods Container IngressControllers HPA ConfigMaps Secrets apply YAML YAML YAML Minimal Concepts Docker Image

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Hype & Reality

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What is a platform? (also known as Humans and Computers) 13

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App Dev DB Systems Admin “Provider” Platform Admin Secrets/Config Source Code Build Artifact Buildpacks / Images Containers Git CI/CD

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Day 0 Day 1 Day 2 Day 3 • Architecture • Design • Implementation • Code-to-Repo • Build • Package • Containerize • Deploy • Multi-Tenancy • Run • Scale • Recover • Update & Patch • Observe • Version • Delete • Clean Up • End of Life

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Workload Abstraction Layers Virtual Machines Container Applications Functions Platform Support? • Functions • Event-Driven • 12-factor apps • Stateful apps • more “types”?

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Easy to do the right thing 17

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Kubernetes Intro • Container Runtime/Platform • Founded in 2013, released in 2014 • Idea based on Google’s internal platform Borg • Not opinionated, open, extensible & configurable • Major project of the Cloud Native Computing Foundation (CNCF) landscape

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“Image build” runtime app app runtime base container runtime app Kubernetes Basics - Container

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runtime app runtime app kubectl create pod replica set runtime app runtime app pod v2 replica set v2 deployment service/ingress endpoint Kubernetes Basics - Orchestration

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The value of Kubernetes • Generic runtime for container workloads • Automatic recovery from crashed pods • Manual and automatic scaling of pods • Rolling update for new version of workloads • Extensible and configurable • Robust • Elasticity on workload and infrastructure level • Widely adopted and available “everywhere”

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The problems with Kubernetes • Container-content agnostic • Steep initial learning curve • Extensible and configurable • ”So much YAML” Suitable Kubernetes workloads • Container images Virtual Machines Container Applications Functions

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Day 0 Day 1 Day 2 Day 3 • Architecture • Design • Implementation • Code-to-Repo • Build • Package • Containerize • Deploy • Multi-Tenancy • Run • Scale • Recover • Update & Patch • Observe • Version • Delete • Clean Up • End of Life Kubernetes responsibility

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Cloud Foundry Intro • Platform as a Service (PaaS) • Founded in 2008, released in 2011 • Fast and easy to build, test, deploy & scale apps • Opinionated, focus on simplicity for dev “Here is my source code, run it on the cloud for me - I do not care how” (Onsi Fakhouri, Pivotal)

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app buildpack cf push app Applications Services container route cf bind-service Basics

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Day 0 Day 1 Day 2 Day 3 • Architecture • Design • Implementation • Code-to-Repo • Build • Package • Containerize • Deploy • Multi-Tenancy • Run • Scale • Recover • Update & Patch • Observe • Version • Delete • Clean Up • End of Life Cloud Foundry responsibility

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The value of Cloud Foundry • “Things Kubernetes does” • Simplicity • Application-aware behaviour • Developer Experience • Abstraction layer above containers • 12-factor style split of workloads

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The problems with Cloud Foundry • Popularity • Limitation to buildpacks coverage • Adoption • Late integration with Kubernetes Suitable Cloud Foundry workloads • Apps, Containers Virtual Machines Container Applications Functions

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Knative • Open Sourced and initiated by Google • Support by Red Hat, Pivotal, IBM … • Runs on top of Kubernetes and Istio • Focus on symplifying K8s experience and provide serverless capabilities • Auto-scale on request load (down to 0)

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VM Kubernetes Istio Serving Eventing

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VM Kubernetes Istio Serving Eventing Tekton

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“Image build” runtime app app runtime base container runtime app

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kn service create —image=maeddes/test service route configuration revision revision revision

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Route Revision Service Minimal Concepts Image

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Day 0 Day 1 Day 2 Day 3 • Architecture • Design • Implementation • Code-to-Repo • Build • Package • Containerize • Deploy • Multi-Tenancy • Run • Scale • Recover • Update & Patch • Observe • Version • Delete • Clean Up • End of Life Knative Serving

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The value of Knative • “Things Kubernetes does” • Born on Kubernetes • Simplicity • Function as a Service • Scale to Zero • Weighted Routing

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The problems with Knative • Requires container • Adoption • Late integration with Kubernetes Suitable Cloud Foundry workloads • Apps, Containers, Functions Virtual Machines Container Applications Functions

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provides most container platform technical capabilities + easy devX + “containerless” + scale to zero + revisions + percentage routing

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LXC Container/Platform history 2018 2017 2014 2013 2011 2008 1979 …. … … . chroot Cloud Foundry Virtualization and isolation in subsystems. Examples: FreeBSD Jails, Linux VServer cgroups (2007) namespaces (2002) istio knative kubernetes eirini 2020 . cf-for-k8s

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What’s new “run CF workloads/apps on K8s”

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Traditional

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New

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cf push kubectl create

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What’s new “run CF on K8s”

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Traditional

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New

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What’s new

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(many!) Kubernetes Offerings local public

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Cloud Foundry on Kubernetes - Blogs/Tutorials cf-for-k8s

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Novatec Consulting GmbH Dieselstraße 18/1 D-70771 Leinfelden-Echterdingen T. +49 711 22040-700 [email protected] www.novatec-gmbh.de 50 https://www.youtube.com/playlist?list=PL09jzegbfUhHSXw5JyaJSSBC_DYFRTidz @maeddes Matthias Haeussler