70 lines
2.3 KiB
Bash
70 lines
2.3 KiB
Bash
#!/usr/bin/env bash
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set -Eeuo pipefail
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readonly SWAPFILE="/swapfile"
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readonly SWAPSIZE="2G"
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readonly SWAPPINESS="20"
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readonly SYSCTL_FILE="/etc/sysctl.d/60-hermes-swap.conf"
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log() { printf '[+] %s\n' "$*"; }
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warn() { printf '[!] %s\n' "$*" >&2; }
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die() { printf '[x] %s\n' "$*" >&2; exit 1; }
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choose_timezone() {
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local current_timezone timezone
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current_timezone="$(timedatectl show --property=Timezone --value 2>/dev/null || true)"
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current_timezone="${current_timezone:-Asia/Novosibirsk}"
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printf 'Select an IANA timezone, for example Asia/Novosibirsk, Europe/Moscow or UTC.\n'
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while :; do
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read -rp "Timezone [${current_timezone}]: " timezone
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timezone="${timezone:-$current_timezone}"
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if timedatectl list-timezones | grep -Fqx -- "$timezone"; then
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timedatectl set-timezone "$timezone"
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log "Timezone set to ${timezone}"
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return 0
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fi
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warn "Unknown timezone: $timezone"
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done
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}
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[[ "$EUID" -eq 0 ]] || die "Run this script as root"
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for command_name in awk blkid fallocate grep mkswap swapon sysctl timedatectl; do
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command -v "$command_name" >/dev/null 2>&1 || die "Required command not found: $command_name"
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done
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choose_timezone
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log "Configuring ${SWAPSIZE} swap file"
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if [[ ! -e "$SWAPFILE" ]]; then
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fallocate -l "$SWAPSIZE" "$SWAPFILE"
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chmod 600 "$SWAPFILE"
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mkswap "$SWAPFILE"
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elif [[ ! -f "$SWAPFILE" || -L "$SWAPFILE" ]]; then
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die "$SWAPFILE exists but is not a regular non-symlink file"
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else
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chmod 600 "$SWAPFILE"
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swap_type="$(blkid -p -s TYPE -o value "$SWAPFILE" 2>/dev/null || true)"
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[[ "$swap_type" == swap ]] || die "$SWAPFILE exists but does not contain a swap signature"
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fi
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if ! swapon --show=NAME --noheadings | awk '{$1=$1}; $0 == "/swapfile" { found=1 } END { exit !found }'; then
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swapon "$SWAPFILE"
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fi
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if ! awk '$1 == "/swapfile" && $3 == "swap" { found=1 } END { exit !found }' /etc/fstab; then
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cp -a /etc/fstab "/etc/fstab.bak.$(date +%F-%H%M%S-%N)"
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printf '%s none swap sw 0 0\n' "$SWAPFILE" >> /etc/fstab
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fi
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cat > "$SYSCTL_FILE" <<EOF
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# Managed by ochenstarik-server-1.sh
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vm.swappiness=${SWAPPINESS}
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EOF
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chmod 644 "$SYSCTL_FILE"
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sysctl -p "$SYSCTL_FILE" >/dev/null
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log "Server memory setup is complete"
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printf 'Timezone: %s\n' "$(timedatectl show --property=Timezone --value)"
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swapon --show
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printf '\nNow run ochenstarik-server-2.sh as root.\n'
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