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# See for more options https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: node-ethtool
  namespace: kube-system
  labels:
    k8s-app: node-ethtool-config
spec:
  selector:

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diff --git a/cmd/genfeatures/genfeatures.go b/cmd/genfeatures/genfeatures.go
new file mode 100644
index 00000000000..953305e2715
--- /dev/null
+++ b/cmd/genfeatures/genfeatures.go
@@ -0,0 +1,43 @@
+/*
+Copyright 2023 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");

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apiVersion: apps/v1
kind: Deployment
metadata:
  name: server-deployment
  labels:
    app: MyApp
spec:
  replicas: 2
  selector:
    matchLabels:

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KEP-1880: Multiple Service CIDRs

Introduction

KEP-1880 allows to configure via API objects the ServiceCIDRs assigned to Kubernetes clusters

This demo is using kind and based on the existing PR kubernetes/kubernetes#116516

A live demo was done in the SIG-Network meeting on Oct 12th 2023 https://youtube.com/playlist?list=PL69nYSiGNLP2E8vmnqo5MwPOY25sDWIxb&si=vTNuT7EBFujoQOce

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kubectl get pods -A -o wide | grep dns
kube-system   kube-dns-5bfd847c64-bkkhf                           4/4     Running   0             80m   10.108.0.5    gke-vanilla-default-pool-ddebe65c-pkzw   <none>           <none>

kubectl debug -n kube-system -it kube-dns-5bfd847c64-bkkhf --image=busybox:1.28 --target=dnsmasq
Targeting container "dnsmasq". If you don't see processes from this container it may be because the container runtime doesn't support this feature.
Defaulting debug container name to debugger-qz6cb.
If you don't see a command prompt, try pressing enter.

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apiVersion: v1
kind: Pod
metadata:
  name: job1
  labels:
    job-name: "job1"
    job-index: "0"
spec:
  hostNetwork: true
  containers:

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apiVersion: apps/v1
kind: Deployment
metadata:
  name: netperf-server
  labels:
    app: netperf-server
spec:
  replicas: 1
  selector:
    matchLabels:

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Create the deploymentn with 100 backends and one Service

kubectl apply -f backends.yaml

Run a pod to test the Service using the httptest program, that allows to specify different parameters of the http connections

./httptest -h
Usage: httpget [options] [url]

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BPF Cheatsheet

Download binary

curl -s -L https://github.com/libbpf/bpftool/releases/download/v7.2.0/bpftool-v7.2.0-amd64.tar.gz | tar xvzf - -C /tmp chmod +x /tmp/bpftool

List network

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Service LoadBalancer deletion

Services of Type: LoadBalancer are handled by external controllers.

These controllers need to handle the infrastructure necessary to provisiong the external Loadbalancer, and use finalizers to avoid deleting the Service before all the necessary steps are done.

Kubernetes provide a reference implementation of a controller for Loadbalancers in https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/cloud-provider/controllers/service/controller.go

Example