Created
July 17, 2020 15:59
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Customize kubernetes scheduler using KinD deployment tool
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#!/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 |
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