Live Hacking on a Raspberry Pi Cluster: From Docker Swarm to Enterprise Kubernetes

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munz & more Docker Live Hacking: From Raspberry Pi to Kubernetes Oracle CODE 2018 US, China, Argentina, Germany Dr. Frank Munz

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2 Dr. Frank Munz • Founded munz & more in 2007 • 17 years Oracle Middleware, Cloud, and Distributed Computing • Consulting and High-End Training • Wrote two Oracle WLS and one Cloud book • Twitter: @frankmunz

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3 things about Docker

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Solves the “Worked For Me!” issue munz & more #4 OS tools, JDK, patches, database driver, libs, appserver, domain, deployment, tools, scripts Docker OS utils, JDK, patches, database driver, libs, appserver, domain, deployment, tools, scripts Integration, Performance, Acceptance Testing Production dockerize it! You can pass environment variables for specific settings e.g. in prod Docker Registry

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Docker in the Cloud? Supported by every major cloud provider: munz & more #5 On premise -> all clouds Docker Registry Docker Container Service EC2 Container Service Google Container Engine Azure Container Service Bluemix Containers

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Docker Registry

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fancy a demo?

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Security

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docker run -d –P fmunz/micro

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vs.

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A stranger gives you a box at night and asks you to connect it to your company network: Would you do it? what should be your biggest nightmare: unknown and unofficial images 10s of thousands

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DB or WebLogic in a Docker Container!

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Oracle Docker Images You have three main options 1.DIY: Dockerfile from Oracle github 2.Oracle Container Registry 3.Docker Hub munz & more #13 https://github.com/oracle/docker-images https://container-registry.oracle.com

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http://www.oracle.com/us/pro ducts/middleware/cloud-app- foundation/weblogic/weblogic -server-on-docker-wp- 2742665.pdf Oracle Whitepaper WebLogic on Docker

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Orchestration / Cluster Manager

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Orchestration Options • On premises: – Docker Swarm, Kubernetes • Oracle Cloud, easy: – Container Cloud Service (OCCS) • Oracle Cloud Enterprise: Kubernetes – Container Engine (OCE) – Free CI/CD Wercker included munz & more #16

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Welcome Mini J

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Design Goals for Mini • Hands-on Raspi experience • Distributed Kubernetes setup & Docker Swarm setup • HA / failover / rolling updates • Have a fun project munz & more #18 Others have build Raspi clusters as well. A lot of credit goes to Roland Huss, Alex Ellis etc

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DIY Raspi Docker Cluster munz & more #20 Component Price Raspi 4x 38€ Micro SD 4x 11€ Power 28€ Wifi 22€ Case 30€ Wires 10€

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K8s • YAML configuration, declarative, uses labels • Pod: Containers sharing IP, network, filesystem – IP is ephemeral • Replica Set (was Replication Controller) – Manages PODs: restarts replicas • Services – Like a proxy, exposes pod – Permanent IP munz & more #22

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Docker Swarm • Native Docker cluster with same API as a single engine -> part of Docker • Fast provisioning, about 500 msec • Various scheduling algorithms: spread, binpack, rand • No insecure mode J munz & more #23

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Kubernetes or Swarm? • Swarm wasn’t impressive when released, but this has changed • Swarm is much easier to understand and to operate • Swarm covers a lot of what K8s does • Industry standard: Kubernetes – See Oracle, AWS, Azure, Google cloud – Kubernetes supported by Docker munz & more #24

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Kubernetes munz & more #25 https://blog.docker.com/2016/03/swarmweek-docker-swarm-exceeds-kubernetes-scale/ K8s components run as Docker containers

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Could you debug it? munz & more #26

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Docker Swarm munz & more #27 https://blog.docker.com/2016/03/swarmweek-docker-swarm-exceeds-kubernetes-scale/

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Managed Enterprise Solution for running Docker?

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OCCS

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OCCS Walkthrough

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OCCS • Easy way to run Docker container in Oracle cloud • No need to install Docker, Kubernetes, buy machines etc. • Integrates with Docker hub and Oracle Container registry • Does neither use Kubernetes nor Docker Swarm

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OCE Managed Kubernetes

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Standard Kubernetes munz & more #33 kubectl run microg --image=fmunz/microg --port 5555 kubectl CLI K8s admin

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Cloud Native Compute Foundation munz & more #34

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https://app.wercker.com munz & more #35

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Wercker

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Wercker • Recently acquired by Oracle • Pipelines execute steps on code – Pipelines == series of steps – Execute inside Docker container • Workflows == chained and branched pipelines • Quickly provision ready to run infrastructure – Push images to any registry – Restart OCCS via webhooks munz & more #37

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fancy a demo?

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Predictions • Kubernetes is now de-facto standard for enterprises. • You will not dockerize 80% of your enterprise IT in the next 24 months. • Docker is somehow like the new Linux: Be ready to experience that cutting edge feeling we had with Linux 12 years ago J • Kubernetes is (sometimes) the new PaaS. munz & more #40

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TL;DR @docker #cloud Docker is used in production / many products offered as Docker images / cross cloud / Docker orchestration is needed / #swarm is the easier #k8s / OCE or OCCS & Wercker removes heavy lifting / Oracle caught the trend! / if Kubernetes then cloud service? / emerging CNCF: Jaeger, Graphana, Prometheus + also: Fn Project @frankmunz

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munz & more #42

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3 Membership Tiers • Oracle ACE Director • Oracle ACE • Oracle ACE Associate bit.ly/OracleACEProgram 500+ Technical Experts Helping Peers Globally Connect: Nominate yourself or someone you know: acenomination.oracle.com @oracleace Facebook.com/oracleaces oracle-ace_ww@oracle.com

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www.munzandmore.com/blog facebook.com/cloudcomputingbook facebook.com/weblogicbook @frankmunz https://www.linkedin.com/in/ frankmunz/ youtube.com/weblogicbook -> more than 50 web casts Don’t be shy J