48 lines
No EOL
1.5 KiB
Bash
48 lines
No EOL
1.5 KiB
Bash
#!/usr/bin/env bash
|
|
set -Eeuo pipefail
|
|
|
|
readonly SWAPFILE="/swapfile"
|
|
readonly SWAPSIZE="2G"
|
|
readonly SWAPPINESS="20"
|
|
readonly SYSCTL_FILE="/etc/sysctl.d/60-hermes-swap.conf"
|
|
|
|
log() { printf '[+] %s\n' "$*"; }
|
|
die() { printf '[x] %s\n' "$*" >&2; exit 1; }
|
|
|
|
[[ "$EUID" -eq 0 ]] || die "Run this script as root"
|
|
for command_name in awk blkid fallocate mkswap swapon sysctl; do
|
|
command -v "$command_name" >/dev/null 2>&1 || die "Required command not found: $command_name"
|
|
done
|
|
|
|
log "Configuring ${SWAPSIZE} swap file"
|
|
if [[ ! -e "$SWAPFILE" ]]; then
|
|
fallocate -l "$SWAPSIZE" "$SWAPFILE"
|
|
chmod 600 "$SWAPFILE"
|
|
mkswap "$SWAPFILE"
|
|
elif [[ ! -f "$SWAPFILE" || -L "$SWAPFILE" ]]; then
|
|
die "$SWAPFILE exists but is not a regular non-symlink file"
|
|
else
|
|
chmod 600 "$SWAPFILE"
|
|
swap_type="$(blkid -p -s TYPE -o value "$SWAPFILE" 2>/dev/null || true)"
|
|
[[ "$swap_type" == swap ]] || die "$SWAPFILE exists but does not contain a swap signature"
|
|
fi
|
|
|
|
if ! swapon --show=NAME --noheadings | awk '{$1=$1}; $0 == "/swapfile" { found=1 } END { exit !found }'; then
|
|
swapon "$SWAPFILE"
|
|
fi
|
|
|
|
if ! awk '$1 == "/swapfile" && $3 == "swap" { found=1 } END { exit !found }' /etc/fstab; then
|
|
cp -a /etc/fstab "/etc/fstab.bak.$(date +%F-%H%M%S-%N)"
|
|
printf '%s none swap sw 0 0\n' "$SWAPFILE" >> /etc/fstab
|
|
fi
|
|
|
|
cat > "$SYSCTL_FILE" <<EOF
|
|
# Managed by ochenstarik-server-1.sh
|
|
vm.swappiness=${SWAPPINESS}
|
|
EOF
|
|
chmod 644 "$SYSCTL_FILE"
|
|
sysctl -p "$SYSCTL_FILE" >/dev/null
|
|
|
|
log "Server memory setup is complete"
|
|
swapon --show
|
|
printf '\nNow run ochenstarik-server-2.sh as root.\n' |