Microservices with Kubernetes, Docker, and Jenkins
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This document discusses the integration of microservices with Docker, Kubernetes, and Jenkins, highlighting the benefits of containerization such as lightweight footprint, portability, and enhanced DevOps practices. It explores Kubernetes concepts like pods, labels, and services, while addressing challenges in managing multiple containers and continuous delivery of microservices. The authors, Rafael Benevides and Christian Posta, also introduce Fabric8 as a tool that enhances microservices deployment on Kubernetes.
Microservices with Kubernetes, Docker, and Jenkins
- 1. 1 Microservices with Docker, Kubernetes and Jenkins Rafael Benevides & Christian Posta @rafabene / @christianposta http://bit.ly/javaone-kb8s-jenkins
- 2. Christian Posta Principal Middleware Architect at Red Hat [email protected] @christianposta ● Author “Microservices for Java Developers” ● Committer Apache Camel, ActiveMQ, ActiveMQ PMC, Fabric8.io ● Worked with large Microservices, web-scale companies ● Blogger, speaker about microservices, DevOps, cloud, distributed systems, messaging
- 3. Rafael Benevides Director of Developer Experience at Red Hat Apache DeltaSpike P.M.C [email protected] @rafabene Java Certifications: SCJA / SCJP / SCWCD / SCBCD / SCEA JBoss Certifications: JBCD / JBCAA Red Hat Certifications: OpenShift / Containers / Ansible Other Certifications: SAP Netweaver / ITIL / IBM Software Quality
- 5. @rafabene and @christianposta Why do you want to run your application inside containers?
- 6. @rafabene and @christianposta ● Lightweight footprint and minimal overhead, ● Portability across machines, ● Simplify DevOps practices, ● Speeds up Continuous Integration, ● Empower Microservices Architectures. ● Isolation Container Advantages Container Engine
- 7. @rafabene and @christianposta A way to run a Linux container: $ docker run -d <image-name> A single and isolated Linux process running in a single machine
- 8. @rafabene and @christianposta DevOps challenges for multiple containers ● How to scale? ● How to avoid port conflicts? ● How to manage them in multiple hosts? ● What happens if a host has a trouble? ● How to keep them running? ● How to update them? ● Where are my containers? Node Node Logger Node Node Node Node
- 9. @rafabene and @christianposta Greek for “Helmsman”; also the root of the word “Governor” (from latin: gubernator) ● Container orchestrator ● Supports multiple cloud and bare-metal environments ● Inspired by Google’s experience with containers ● Open source, written in Go Manage applications, not machines Meet Kubernetes
- 10. @rafabene and @christianposta Version 1.3 Hosted on GitHub 800+ contributors 34,000+ commits 16,000+ GitHub stars Red Hat HP IBM Mesosphere Microsoft Project Partners CoreOS Pivotal SaltStack VMWare http://kubernetes.io/ https://github.com/kubernetes/kubernetes Open Source community
- 11. Master API Server Service Layer VirtualPhysical Private Public Persistent Storage Node Node Logger Node Node Node Node Dev Ops SCM (Git/Svn) CI/CD Automation Routing Layer Registry SDN Overlay Network Controllers - Scheduler - Replication - Services - Builds - Routes - Deployment Kubernetes OpenShift - Deployments - Builds - ImageStreams
- 12. @rafabene developers.redhat.com Kubernetes Concepts Pod Replication Controller Service Label One or More Containers Shared IP Shared Storage Volume Shared Resources Shared Lifecycle Ensures that a specified number of pod replicas are running at any one time Grouping of pods, act as one, has stable virtual IP and DNS name Key/Value pairs associated with Kubernetes objects (e.g. env=production)
- 13. @rafabene and @christianposta Concept: Pod ● Group of containers ● Live and die together ● Share: ○ IP ○ Secrets ○ Volumes ○ Labels * * we will talk about labels later Labels Application Administrative console Log collector IP: 10.x.x.x Volume
- 14. SCM (Git/Svn) Master API Server Service Layer VirtualPhysical Private Public Persistent Storage Node Node Logger Node Node Node Node Dev Ops CI/CD Automation Routing Layer Registry SDN Overlay Network Controllers - Scheduler - Replication - Services - Builds - Routes - Deployment Kubernetes OpenShift - Deployments - Builds - ImageStreams
- 15. SCM (Git/Svn) Master API Server Service Layer VirtualPhysical Private Public Persistent Storage Node Node Logger Node Node Node Node Dev Ops CI/CD Automation Routing Layer Registry SDN Overlay Network Controllers - Scheduler - Replication - Services - Builds - Routes - Deployment Kubernetes OpenShift - Deployments - Builds - ImageStreams
- 16. SCM (Git/Svn) Master API Server Service Layer VirtualPhysical Private Public Persistent Storage Node Node Logger Node Node Node Node Dev Ops CI/CD Automation Routing Layer Registry SDN Overlay Network Controllers - Scheduler - Replication - Services - Builds - Routes - Deployment Kubernetes OpenShift - Deployments - Builds - ImageStreams
- 17. @rafabene and @christianposta Concept: Labels App: Cool Env: Dev Version: 1.0 App: Cool Env: Prod Version: 1.0 App: Cool Env: Dev Version: 2.0 App: Cool Env: Prod Version: 2.0 Everything in Kubernetes can have a label Node Logger Node NodeNode
- 18. @rafabene and @christianposta Concept: Labels App: Cool Env: Dev Version: 1.0 App: Cool Env: Prod Version: 1.0 App: Cool Env: Dev Version: 2.0 App: Cool Env: Prod Version: 2.0 Logger Node NodeNode Node
- 19. @rafabene and @christianposta Concept: Labels App: Cool Env: Dev Version: 1.0 App: Cool Env: Prod Version: 1.0 App: Cool Env: Dev Version: 2.0 App: Cool Env: Prod Version: 2.0 Logger Node Node Node Node
- 20. @rafabene and @christianposta Node 2 POD App: Cool Env: Prod Version: 1.0 POD Service Labels selector: ● App=Cool ● Env=Prod IP: 172.x.x.x App: Nice Env: Prod Version: 1.0 Concept: Services Node 1 POD
- 21. @rafabene and @christianposta Using Environment variables: Using internal DNS: $ ping mysql Service discovery
- 22. @rafabene and @christianposta Deployment Concept: Rolling Updates Pod Replication Controller Pod Pod Pod App: Cool Version: 1.0 Version: 1.0 Replicas: 4 Backend Replication Controller Version: 2.0 Replicas: 1 PodPod Pod Pod App: Cool Version: 2.0 Version: 1.0 Replicas: 3 Version: 2.0 Replicas: 2 Version: 1.0 Replicas: 2 Version: 2.0 Replicas: 3 Version: 1.0 Replicas: 1 Version: 2.0 Replicas: 4
- 23. @rafabene and @christianposta If you want to know more about Kubernetes, join The "Kubernertes for Java Developers" lab Wednesday, Sep 21, 12:30 p.m. - 2:30 p.m. Hilton - Franciscan Room C/D
- 25. @rafabene and @christianposta Hello World Service - Greet Guestbook Service - Create Guestbook Service - Retrieve
- 26. @rafabene and @christianposta Creating business value through software is about speed, safety, iteration, and continuous improvement
- 28. @rafabene and @christianposta How do we deliver value fast (and safely)? ANSWER: Continuous delivery of containerized microservices
- 29. @rafabene and @christianposta Challenges of microservices CI/CD ● Lots of independent teams want their own ○ flexible pipelines ○ Environments (Dev/IST/UAT/Prod) ○ Resources (compute, network, storage) ● Automation because we have lots of microservices ○ Creation of projects, CD pipelines, environments, releases, etc.
- 30. @rafabene and @christianposta Jenkins and Kubernetes is kinda groovy! Jenkins Pipeline + Jenkins Kubernetes Plugin Rocks!
- 31. @rafabene and @christianposta Fabric8 all the things! ● Built on top of Kubernetes ● Wizards to create microservices ● Package as immutable containers ● Rolling upgrade across environments ● 1-Click install of fully configured CI/CD (Jenkins Pipeline, Nexus, Git) ● Feedback loops ● Lots of developer tooling http://fabric8.io
- 32. @rafabene and @christianposta Fabric8 stands on the shoulder of giants
- 33. @rafabene and @christianposta And more giants...
- 34. @rafabene and @christianposta And more giants...
- 35. @rafabene and @christianposta Did I mention giants...
- 36. @rafabene and @christianposta Getting started with Fabric8 on Kubernetes ● Kubernetes ○ Google Container Engine (GKE) http://cloud.google.com/container-engine ○ Amazon, Azure, Digital Ocean, et.al. https://stackpoint.io ○ On premise: http://kubernetes.io ● OpenShift (Enterprise Kubernetes) ○ https://openshift.com ● Then deploy fabric8 with gofabric8 deploy ○ https://github.com/fabric8io/gofabric8 http://fabric8.io
- 37. @rafabene and @christianposta Demo Time!! Please reach out with questions! Rafael Benevides @rafabene [email protected] Christian Posta @christianposta [email protected]