ETCD 备份脚本

#!/bin/bash

# etcd 备份脚本

# 用途：备份现有的单节点 etcd 数据

set -e

# 配置参数

BACKUP_DIR="/etcd-cluster/backup"

BACKUP_DATE=$(date +%Y%m%d_%H%M%S)

BACKUP_FILE="${BACKUP_DIR}/etcd_backup_${BACKUP_DATE}.db"

CONTAINER_NAME="etcd-old"

# 颜色输出

RED='\033[0;31m'

GREEN='\033[0;32m'

YELLOW='\033[1;33m'

NC='\033[0m' # No Color

echo -e "${GREEN}========================================${NC}"

echo -e "${GREEN}etcd 数据备份脚本${NC}"

echo -e "${GREEN}========================================${NC}"

# 检查容器是否运行

echo -e "${YELLOW}[1/5] 检查 etcd 容器状态...${NC}"

if ! docker ps | grep -q "${CONTAINER_NAME}"; then

echo -e "${RED}错误: 容器 ${CONTAINER_NAME} 未运行${NC}"

exit 1

fi

echo -e "${GREEN}✓ 容器运行正常${NC}"

# 创建备份目录

echo -e "${YELLOW}[2/5] 创建备份目录...${NC}"

mkdir -p "${BACKUP_DIR}"

echo -e "${GREEN}✓ 备份目录: ${BACKUP_DIR}${NC}"

# 执行快照备份

echo -e "${YELLOW}[3/5] 创建 etcd 快照...${NC}"

docker exec ${CONTAINER_NAME} etcdctl snapshot save /tmp/etcd_snapshot.db

echo -e "${GREEN}✓ 快照创建成功${NC}"

# 复制快照到宿主机

echo -e "${YELLOW}[4/5] 复制快照到宿主机...${NC}"

docker cp ${CONTAINER_NAME}:/tmp/etcd_snapshot.db "${BACKUP_FILE}"

echo -e "${GREEN}✓ 快照已保存到: ${BACKUP_FILE}${NC}"

# 验证快照

echo -e "${YELLOW}[5/5] 验证快照完整性...${NC}"

docker exec ${CONTAINER_NAME} etcdctl snapshot status /tmp/etcd_snapshot.db --write-out=table

echo -e "${GREEN}✓ 快照验证通过${NC}"

# 导出所有数据（可选，用于检查）

echo -e "${YELLOW}[额外] 导出所有 key-value 数据...${NC}"

docker exec ${CONTAINER_NAME} etcdctl get "" --prefix --keys-only > "${BACKUP_DIR}/all_keys_${BACKUP_DATE}.txt"

docker exec ${CONTAINER_NAME} etcdctl get "" --prefix > "${BACKUP_DIR}/all_data_${BACKUP_DATE}.txt"

echo -e "${GREEN}✓ 数据已导出${NC}"

# 显示统计信息

echo -e "${GREEN}========================================${NC}"

echo -e "${GREEN}备份完成！${NC}"

echo -e "${GREEN}========================================${NC}"

echo -e "备份文件: ${BACKUP_FILE}"

echo -e "文件大小: $(du -h ${BACKUP_FILE} | cut -f1)"

echo -e "备份时间: ${BACKUP_DATE}"

echo -e "${GREEN}========================================${NC}"

# 清理容器内临时文件

docker exec ${CONTAINER_NAME} rm -f /tmp/etcd_snapshot.db

echo -e "${GREEN}备份脚本执行完成！${NC}"