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Desmitificando el Networking en Kubernetes

04280fd182525cdaee76572782ec34c0?s=47 Pablo Fredrikson
August 31, 2018
Technology
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490

Desmitificando el Networking en Kubernetes

04280fd182525cdaee76572782ec34c0?s=128

Pablo Fredrikson

August 31, 2018
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Transcript

  1. ( Desmitificando ) Networking en Kubernetes Pablo Fredrikson - Lead

    SRE @ Invision @pablokbs

  2. @pablokbs NO SOY VENEZOLANO ni chileno • Pablo Fredrikson •

    Argentino (Mendoza) • Lead SRE @ Invision • Mil años con Linux • 2 Años con Kubernetes en Producción

  3. @pablokbs STORY TIME

  4. @pablokbs Kubernetes en 3 minutos - Conceptos • Contenedor •

    Pod • Nodo / Worker • Replicas • Daemonset

  5. @pablokbs Kubernetes en 3 minutos MASTER API server Kube Scheduler

    Controller Manager Cloud Controller Manager API Kubernetes Cluster Services API Kubernetes Cluster Services API etcd deployment pod1: - container1 - container2 replicas: 3 pod2: - container3 replicas: 2 Kubelet Kubelet Kubelet P1R3 P1R1 P2R1 P1R2 P2R2

  6. @pablokbs Kubernetes en 3 minutos Kubelet P2R1 Kubelet P1R2 Kubelet

    Kubernetes Cluster Services API deployment pod1: - container1 - container2 replicas: 3 pod2: - container3 replicas: 2 P1R3 P1R1 P2R2 P1R3 P1R1

  7. @pablokbs Expertos en Kubernetes @pablokbs

  8. Qs? @pablokbs @InvisionApp

  9. @pablokbs Pod Networking Kubernetes Cluster Services API Manager Workers Kubelet

    pod c c calico 10.0.10.34 Kubelet pod c c calico 10.0.10.37 ip route ip route • Cada pod tiene su propio IP • IP routing etcd

  10. @pablokbs Kubernetes Services: Kube-proxy Kubelet Kubernetes Cluster Services API pod

    c c calico 10.0.10.34 ip routing kube-proxy Kubelet pod c c calico 10.0.10.37 ip routing kube-proxy Manager Workers • Cluster IP • Node Port • Load Balancer

  11. @pablokbs Kubelet Kubernetes Services: Ingress Kubernetes Cluster Services API Manager

    Workers myservice.example.com K C K C svc pod c c calico 10.0.10.34 Kubelet pod c c calico 10.0.10.37

  12. @pablokbs Network Policies Kubernetes Cluster Services API Manager Workers Kubelet

    front c c calico 10.0.10.34 ip route + iptables Kubelet client c c calico 10.0.10.37 ip route + iptables Kubelet back c c calico 10.0.10.38 ip route + iptables

  13. @pablokbs Conceptos de conectividad de Kubernetes • Pod networking (CNI)

    • Services (kube-proxy) • Ingress • Network Policy

  14. @pablokbs Demo

  15. Qs? @pablokbs @InvisionApp