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container.training/prepare-labs/konk.sh
2025-04-27 12:53:41 +02:00

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#!/bin/sh
#
# Baseline resource usage per vcluster in our usecase:
# 500 MB RAM
# 10% CPU
# (See https://docs.google.com/document/d/1n0lwp6rQKQUIuo_A5LQ1dgCzrmjkDjmDtNj1Jn92UrI)
# PRO2-XS = 4 core, 16 gb
set -e
PROVIDER=scaleway
STUDENTS=30
case "$PROVIDER" in
linode)
export TF_VAR_node_size=g6-standard-6
export TF_VAR_location=us-east
;;
scaleway)
export TF_VAR_node_size=PRO2-XS
# For tiny testing purposes, these are okay too:
#export TF_VAR_node_size=PLAY2-NANO
export TF_VAR_location=fr-par-2
;;
esac
# set kubeconfig file
export KUBECONFIG=~/kubeconfig
if [ "$PROVIDER" = "kind" ]; then
kind create cluster --name konk
ADDRTYPE=InternalIP
else
./labctl create --mode mk8s --settings settings/konk.env --provider $PROVIDER --tag konk
cp tags/konk/stage2/kubeconfig.101 $KUBECONFIG
ADDRTYPE=ExternalIP
fi
# set external_ip labels
kubectl get nodes -o=jsonpath='{range .items[*]}{.metadata.name} {.status.addresses[?(@.type=="'$ADDRTYPE'")].address}{"\n"}{end}' |
while read node address ignoredaddresses; do
kubectl label node $node external_ip=$address
done
# vcluster all the things
./labctl create --settings settings/mk8s.env --provider vcluster --mode mk8s --students $STUDENTS
# install prometheus stack because that's cool
helm upgrade --install --repo https://prometheus-community.github.io/helm-charts \
--namespace prom-system --create-namespace \
kube-prometheus-stack kube-prometheus-stack
# and also fix sysctl
kubectl apply -f ../k8s/sysctl.yaml --namespace kube-system