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Add temporary kernel parameter tuning for CloudNativePG Kind cluster #25

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33 changes: 33 additions & 0 deletions scripts/setup.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,39 @@

set -eu

# Format: "recommended:minimum"
declare -A limits=(
[fs.inotify.max_user_watches]="655360:20000"
[fs.inotify.max_user_instances]="1280:1000"
[kernel.keys.maxkeys]="20000:1000"
[kernel.keys.maxbytes]="500000:250000"
)

declare -a updates=()

for key in "${!limits[@]}"; do
current=$(< /proc/sys/$(tr . / <<< "$key"))
recommended="${limits[$key]%%:*}"
minimum="${limits[$key]##*:}"
(( current < minimum )) && updates+=("$key=$recommended")
done

if (( ${#updates[@]} > 0 )); then
echo -e "\nSome kernel parameters are below recommended levels for running a CloudNativePG Kind cluster."
echo -e "The following temporary (non-persistent) updates are suggested:\n"
echo -e " sudo sysctl -w ${updates[*]}\n"

read -rp "Apply this command? (Y/n): " confirm
confirm=${confirm:-Y}

if [[ "$confirm" =~ ^[Yy]$ ]]; then
sudo sysctl -w "${updates[@]}"
echo -e "\nKernel parameters updated temporarily for CloudNativePG Kind cluster to run properly."
else
echo -e "\n\033[0;31m⚠️ Kernel parameters not updated. CloudNativePG Kind cluster may fail to start or run correctly.\033[0m"
fi
fi

# MinIO settings and credentials
MINIO_IMAGE="${MINIO_IMAGE:-quay.io/minio/minio:RELEASE.2025-04-22T22-12-26Z}"
MINIO_EU_ROOT_USER="${MINIO_EU_ROOT_USER:-cnpg-eu}"
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