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Merge pull request #5 from buildplan/test

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swapiness and cashe pressure config
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buildplan 2025-06-27 13:14:05 +01:00 committed by GitHub
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1 changed files with 33 additions and 7 deletions
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40
setup_harden_debian_ubuntu.sh
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@ -1,7 +1,7 @@
#!/bin/bash
# Debian 12 and Ubuntu Server Hardening Interactive Script
# Version: 3.10 | 2025-06-27
# Version: 3.11 | 2025-06-27
# Compatible with: Debian 12 (Bookworm), Ubuntu 20.04 LTS, 22.04 LTS, 24.04 LTS. 24.10 (experimental)
# Tested on Debian 12, Ubuntu 24.04 and 24.10 at DigitalOcean, Oracle Cloud, Netcup, Hetzner and local VMs
#
@ -80,7 +80,7 @@ print_header() {
echo -e "${CYAN}╔═════════════════════════════════════════════════════════════════╗${NC}"
echo -e "${CYAN}║ ║${NC}"
echo -e "${CYAN}║ DEBIAN/UBUNTU SERVER SETUP AND HARDENING SCRIPT ║${NC}"
echo -e "${CYAN}║ v3.10 | 2025-06-27 ║${NC}"
echo -e "${CYAN}║ v3.11 | 2025-06-27 ║${NC}"
echo -e "${CYAN}╚═════════════════════════════════════════════════════════════════╝${NC}"
echo
}
@ -97,7 +97,7 @@ print_success() {
}
print_error() {
echo -e "${RED}✗ $1${NC}" | tee -a "$LOG_FILE"
echo -e "${RED}✗ $1${NC}" | tee -a "$LOG_FILE"
}
print_warning() {
@ -976,17 +976,43 @@ configure_swap() {
rm -f /swapfile || true
exit 1
fi
if ! grep -q '^/swapfile ' /etc/fstab; then
if ! grep -q '^/swapfile ' /etc/fstab; then
echo '/swapfile none swap sw 0 0' >> /etc/fstab
fi
print_success "Swap file created: $SWAP_SIZE"
fi
print_info "Optimizing swap settings..."
print_info "Configuring swap settings..."
local SWAPPINESS=10
local CACHE_PRESSURE=50
if confirm "Customize swap settings (vm.swappiness and vm.vfs_cache_pressure)?"; then
while true; do
read -rp "$(echo -e "${CYAN}Enter vm.swappiness (0-100) [default: $SWAPPINESS]: ${NC}")" INPUT_SWAPPINESS
INPUT_SWAPPINESS=${INPUT_SWAPPINESS:-$SWAPPINESS}
if [[ "$INPUT_SWAPPINESS" =~ ^[0-9]+$ && "$INPUT_SWAPPINESS" -ge 0 && "$INPUT_SWAPPINESS" -le 100 ]]; then
SWAPPINESS=$INPUT_SWAPPINESS
break
else
print_error "Invalid value for vm.swappiness. Must be between 0 and 100."
fi
done
while true; do
read -rp "$(echo -e "${CYAN}Enter vm.vfs_cache_pressure (1-1000) [default: $CACHE_PRESSURE]: ${NC}")" INPUT_CACHE_PRESSURE
INPUT_CACHE_PRESSURE=${INPUT_CACHE_PRESSURE:-$CACHE_PRESSURE}
if [[ "$INPUT_CACHE_PRESSURE" =~ ^[0-9]+$ && "$INPUT_CACHE_PRESSURE" -ge 1 && "$INPUT_CACHE_PRESSURE" -le 1000 ]]; then
CACHE_PRESSURE=$INPUT_CACHE_PRESSURE
break
else
print_error "Invalid value for vm.vfs_cache_pressure. Must be between 1 and 1000."
fi
done
else
print_info "Using default swap settings (vm.swappiness=$SWAPPINESS, vm.vfs_cache_pressure=$CACHE_PRESSURE)."
fi
local NEW_SWAP_CONFIG
NEW_SWAP_CONFIG=$(mktemp)
tee "$NEW_SWAP_CONFIG" > /dev/null <<EOF
vm.swappiness=10
vm.vfs_cache_pressure=50
vm.swappiness=$SWAPPINESS
vm.vfs_cache_pressure=$CACHE_PRESSURE
EOF
if [[ -f /etc/sysctl.d/99-swap.conf ]] && cmp -s "$NEW_SWAP_CONFIG" /etc/sysctl.d/99-swap.conf; then
print_info "Swap settings already correct. Skipping."