Customize kubernetes scheduler using KinD deployment tool

deploy.sh

#!/bin/bash
# SPDX-license-identifier: Apache-2.0
##############################################################################
# Copyright (c)
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################

set -o pipefail
set -o errexit
set -o nounset
set -o xtrace

function install_deps {
    pkgs=""
    for pkg in "$@"; do
        if ! command -v "$pkg"; then
            pkgs+=" $pkg"
        fi
    done
    if [ -n "$pkgs" ]; then
        curl -fsSL http://bit.ly/install_pkg | PKG=$pkgs bash
    fi
}

install_deps kind kubectl docker

cat << EOF > scheduler-config.conf
apiVersion: kubescheduler.config.k8s.io/v1beta1
clientConnection:
  acceptContentTypes: ""
  burst: 100
  contentType: application/vnd.kubernetes.protobuf
  kubeconfig: /etc/kubernetes/scheduler.conf
  qps: 50
disablePreemption: false
enableContentionProfiling: true
enableProfiling: true
extenders: null
healthzBindAddress: 0.0.0.0:10251
kind: KubeSchedulerConfiguration
leaderElection:
  leaderElect: true
  leaseDuration: 15s
  renewDeadline: 10s
  resourceLock: endpointsleases
  resourceName: kube-scheduler
  resourceNamespace: kube-system
  retryPeriod: 2s
metricsBindAddress: 0.0.0.0:10251
percentageOfNodesToScore: 0
podInitialBackoffSeconds: 1
podMaxBackoffSeconds: 10
profiles:
- schedulerName: default-scheduler
  plugins:
    score:
      disabled:
        - name: DefaultTopologySpread
EOF

# K8s cluster deployment
if ! kind get clusters | grep kind; then
    cat << EOF | kind create cluster --config=-
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
  - role: control-plane
    kubeadmConfigPatches:
      - |
        kind: ClusterConfiguration
        scheduler:
          extraArgs:
            config: /etc/kubernetes/scheduler-config.conf
          extraVolumes:
            - name: configuration
              hostPath: /etc/kubernetes/scheduler-config.conf
              mountPath: /etc/kubernetes/scheduler-config.conf
              readOnly: true
              pathType: File
  - role: worker
  - role: worker
EOF
fi

docker cp scheduler-config.conf kind-control-plane:/etc/kubernetes/scheduler-config.conf

# Wait nodes to get ready
for node in $(kubectl get node -o jsonpath='{range .items[*]}{.metadata.name}{"\n"}'); do
    kubectl wait --for=condition=ready "node/$node" --timeout=120s
done