kubernetes_external_traffic_policy.d2

#!/usr/bin/env d2 --theme 200
#
#  Author: Hari Sekhon
#  Date: 2023-05-07 03:02:50 +0100 (Sun, 07 May 2023)
#
#  vim:ts=2:sts=2:sw=2:et:filetype=d2
#
#  https://github.com/HariSekhon/Diagrams-as-Code
#
#  License: see accompanying Hari Sekhon LICENSE file
#
#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
#
#  https://www.linkedin.com/in/HariSekhon
#

# ============================================================================ #
#      K u b e r n e t e s   E x t e r n a l   T r a f f i c   P o l i c y
# ============================================================================ #

title: {
  label: Kubernetes Service External Traffic Policy
  near: top-center
  shape: text
  style.font-size: 40
  style.underline: true
}

classes: {
  load_balancer: {
    label: GKE Load Balancer
    icon: https://icons.terrastruct.com/gcp%2FProducts%20and%20services%2FNetworking%2FCloud%20Load%20Balancing.svg
    shape: image
  }
  service: {
    label: Service
    icon: https://diagrams.mingrammer.com/img/resources/k8s/network/svc.png
    shape: image
  }
  pod: {
    label: Pod
    icon: https://diagrams.mingrammer.com/img/resources/k8s/compute/pod.png
    shape: image
  }
  animated: {
    style.animated: true
  }
  animated_local: {
    label: Traffic only sent to local pod\nmaintains client source IP address
    style.animated: true
  }
  no_traffic: {
    label: No Traffic\nLB Health Check\ndetermines no pod\non this server\n\n\n.
    style.stroke-dash: 5
  }
}

lb: {class: load_balancer}

Kubernetes: {
  style.double-border: true
  ext: "External Traffic Policy: Cluster" {
    server1: Server {
      service1: {class: service}
      pod1: {class: pod}
      _._._.lb -> service1: {class: animated}
      service1 -> pod1: {class: animated}
      service1 -> _.server2.pod2: {class: animated}
      service1 -> _.server3.pod3: {style.opacity: 0}
    }
    server2: Server {
      service2: {class: service}
      pod2: {class: pod}
      _._._.lb -> service2: {class: animated}
      service2 -> pod2: {class: animated}
      service2 -> _.server1.pod1: {class: animated}
    }
    server3: Server {
      service3: {class: service}
      _._._.lb -> service3: {class: animated}
      pod3: {
        class: pod
        style.opacity: 0.5
        label: Pod not running here
      }
      service3 -> _.server1.pod1: {class: animated}
      service3 -> _.server2.pod2: {class: animated}
    }
  }
  local: "External Traffic Policy: Local" {
    server4: Server {
      service4: {class: service}
      service4.label: Service Unused
      pod4: {
        class: pod
        style.opacity: 0.5
        label: Pod not running here
      }
      _._._.lb -- service4: {class: no_traffic}
      service4 -> pod4: {style.opacity: 0}
    }
    server5: Server {
      service5: {class: service}
      pod5: {class: pod}
      _._._.lb -> service5: {class: animated}
      service5 -> pod5: {class: animated_local}
      # service5 -> _.server4.pod4 { style.opacity: 0 }
    }
    server6: Server {
      service6: {class: service}
      pod6: {class: pod}
      _._._.lb -> service6: {class: animated}
      service6 -> pod6: {class: animated_local}
    }
  }
}