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IBM Bluemix Nice meetup #5 - 20170504 - Orchestrer Docker avec Kubernetes

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IBM Bluemix Nice meetup #5 - 20170504 - Orchestrer Docker avec Kubernetes

  1. 1. 2016 IBM Corporation Orchestrer vos conteneurs Docker avec KUBERNETES Discover – Session Pierre Yves DROIN TLT DOCKER LEADER Meetup on May 4 th 2017 Benjamin FUENTES Bluemix Evangelist - Software Architect and Developer Lionel Macé Bluemix Technical Sales Europe IBM Hybrid Cloud
  2. 2. 2017 IBM Corporation Understand (quickly) Docke Education Package PIERRE YVES DROIN TLT DOCKER LEADER
  3. 3. D E S IG N :Iv a n T ou ss ain t © 2016 IBM Corporation Docker Basic Functions
  4. 4. 2017 IBM Corporation What is Kubernetes (K8S) ? Education Package PIERRE YVES DROIN TLT DOCKER LEADER
  5. 5. D E S IG N :Iv a n T ou ss ain t © 2016 IBM Corporation Container Orchestration Physical InfrastructureLayer 1 Raw Compute,Storage,Network VirtualInfrastructureLayer 2 vSphere,EC2,GCP, Azure, OpenStack Operating SystemLayer 3 Ubuntu,RHEL,CoreOS,Unikernels ContainerEngineLayer 4 Docker,rkt, runC (OCI), Osv, LXC, LXD Orchestration/Scheduling Service Model Layer 5 Kubernetes, Docker Swarm, Marathon/Mesos, Nomad, Diego Development Workflow Opinionated Containers Layer 6 Cloud Foundry,OpenShift,Docker Cloud,Deis,Apcera,Apprenda
  6. 6. 2016 IBM Corporation Orchestration Tool – data from Anchore's survey
  7. 7. D E S IG N :Iv a n T ou ss ain t © 2016 IBM Corporation What is Kubernetes ? • Kubernetes is an open-source platform for automating deployment, scaling, and operations of application containers across clusters of hosts, providing container-centric infrastructure. • Container orchestrator • Runs and manages containers • Supports multiple cloud and bare-metal environments • Inspired and informed by Google's experiences and internal systems • 100% Open source, written in Go • Manage applications, not machines • Rich ecosystem of plug-ins for scheduling, storage, networking
  8. 8. D E S IG N :Iv a n T ou ss ain t © 2016 IBM Corporation Kubernetes Terminology · Nodes · Hosts that run Kubernetesapplications · Master node · Controls and manages the cluster · Kubectl – command line client · REST API – used for communicating with the workers · Scheduling and replication logic · Generally 2 or more master nodes for resiliency, but are not used for scaling out the cluster · Worker node · Node that hosts the K8 services · Kubelet – K8s agent that accepts commands from the master · Kubeproxy – network proxy service on a node level · Responsible for routing activities for inbound or ingress traffic · Docker host · Containers · Units of packaging · Pods · A collection of containers that run on a worker node · A pod can contain more than one service · Each pod has it’s own IP · A pod shares a PID namespace, network, and hostname
  9. 9. D E S IG N :Iv a n T ou ss ain t © 2016 IBM Corporation Kubernetes Terminology (cont) · Replication Controller
 · Ensures availability and scalability · Responsible for maintaining as many pods as requested by the user · Uses a template that describes specifically what each pod should contain · Labels
 · Metadata assigned to K8 resources – such as pods, services · Key-Value pairsfor identification · Critical to K8s as it relies on querying the cluster for resources that have certain labels · Services
 · Collection of podsexposed as an endpoint · Information stored in the K8 cluster state and networking info propagated to all worker nodes · Secrets · Sensitive information that containers need to read or consume · Are special volumes mounted automatically so that the containers can read its contents · Each entry has it’s own path · Proxy · Implementation of a network proxy and a load balancer · Support the service abstraction along with other network operation · Responsible for route the appropriate POD based on IP and port number of the incoming request · Etcd · A metadata service providing the backend data store
  10. 10. D E S IG N :Iv a n T ou ss ain t © 2016 IBM Corporation Kubernetes ArchitectureDiagram (wikipedia source)
  11. 11. © IBM Corporation Image Registry API UI User Interface CLI Command Line Interface Kubernetes Master Worker Node 1 Worker Node 2 Worker Node 3 Worker Node n Kubernetes Architecture
  12. 12. © IBM Corporation API UI User Interface CLI Command Line Interface Kubernetes Master Kubernetes Architecture API Server Scheduler Controller etcd
  13. 13. © IBM Corporation Image Registry Kubernetes Master Worker Node 1, 2, 3… n Kubernetes Architecture Pod Pod Pod docker Kube- proxy Container Container Container Container Container Container Container Container Container kubelet

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