initial commit

01/01-k-server-initial-setup.09.sh

@@ -0,0 +1,104 @@
+#!/bin/bash
+#===============================================================================
+# ШАГ 9: НАСТРОЙКА SWAP
+#===============================================================================
+# Запуск: sudo bash 01-k-server-initial-setup.09.sh
+#===============================================================================
+
+SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
+source "$SCRIPT_DIR/01-k-server-initial-setup.00.sh"
+
+init_log
+check_root
+
+print_header "ШАГ 9: НАСТРОЙКА SWAP"
+
+#-------------------------------------------------------------------------------
+# 9.1 Проверка существующего swap
+#-------------------------------------------------------------------------------
+print_subheader "Проверка swap"
+
+if has_swap; then
+    print_success "Swap уже настроен:"
+    swapon --show
+    free -h
+    print_success "Шаг 9 завершён (пропуск)"
+    exit 0
+else
+    print_info "Swap не найден"
+fi
+
+#-------------------------------------------------------------------------------
+# 9.2 Запрос размера
+#-------------------------------------------------------------------------------
+print_subheader "Создание swap"
+
+echo ""
+echo "Рекомендуемый размер swap: 1-2GB"
+echo ""
+
+read -p "Размер swap в GB [2]: " SWAP_SIZE
+SWAP_SIZE=${SWAP_SIZE:-2}
+
+SWAP_FILE="/swapfile"
+
+#-------------------------------------------------------------------------------
+# 9.3 Создание swap-файла
+#-------------------------------------------------------------------------------
+print_info "Создание swap-файла ${SWAP_SIZE}GB..."
+
+# Проверка свободного места
+FREE_SPACE=$(df -BG / | tail -1 | awk '{print $4}' | tr -d 'G')
+if [[ "$FREE_SPACE" -lt "$SWAP_SIZE" ]]; then
+    print_error "Недостаточно свободного места: ${FREE_SPACE}GB < ${SWAP_SIZE}GB"
+    exit 1
+fi
+
+# Создание
+fallocate -l "${SWAP_SIZE}G" "$SWAP_FILE"
+chmod 600 "$SWAP_FILE"
+mkswap "$SWAP_FILE"
+swapon "$SWAP_FILE"
+
+print_success "Swap создан"
+
+#-------------------------------------------------------------------------------
+# 9.4 Добавление в fstab
+#-------------------------------------------------------------------------------
+print_subheader "Настройка fstab"
+
+if ! grep -q "$SWAP_FILE" /etc/fstab; then
+    echo "$SWAP_FILE none swap sw 0 0" >> /etc/fstab
+    print_success "Swap добавлен в fstab"
+else
+    print_info "Swap уже в fstab"
+fi
+
+#-------------------------------------------------------------------------------
+# 9.5 Оптимизация swappiness
+#-------------------------------------------------------------------------------
+print_subheader "Оптимизация swappiness"
+
+# Установить swappiness = 10 (меньше использовать swap)
+SWAPPINESS=10
+sysctl vm.swappiness=$SWAPPINESS
+
+if ! grep -q "vm.swappiness" /etc/sysctl.conf; then
+    echo "vm.swappiness = $SWAPPINESS" >> /etc/sysctl.conf
+    print_success "swappiness настроен"
+else
+    sed -i "s/vm.swappiness.*/vm.swappiness = $SWAPPINESS/" /etc/sysctl.conf
+    print_success "swappiness обновлён"
+fi
+
+#-------------------------------------------------------------------------------
+# 9.6 Проверка
+#-------------------------------------------------------------------------------
+print_subheader "Проверка"
+
+echo ""
+free -h
+echo ""
+swapon --show
+
+print_success "Шаг 9 завершён: Swap настроен"