31f111d812
问题描述： - backup_folders() 函数使用 echo 返回文件路径 - 但 tar 命令的 2>&1 将 stderr 重定向到 stdout - tar 的警告信息（如 "Removing leading '/' from member names"） 被 $(backup_folders) 捕获到 folders_tar 变量 - 导致 merge_backups() 收到的不是文件路径而是 tar 输出 - 最终备份文件中缺少 folders 目录 修复方案： - 将 tar 命令改为 2>&1 >&2 - 先将 stderr 重定向到 stdout (2>&1) - 再将合并后的 stdout 重定向到 stderr (>&2) - 确保 tar 的所有输出都到 stderr，不干扰函数返回值 影响： - 修复后文件夹备份会正确包含在最终备份文件中 - 用户可以正常恢复文件夹数据
414 lines
12 KiB
Bash
Executable File
414 lines
12 KiB
Bash
Executable File
#!/bin/bash
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###############################################################################
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# Docker Backup Script
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# 功能：备份指定文件夹和 MySQL 容器数据库
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###############################################################################
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set -e # 遇到错误立即退出
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set -o pipefail # 管道命令任何一个失败都返回失败
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# 脚本所在目录
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# 配置文件路径（系统级配置）
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CONFIG_FILE="${CONFIG_FILE:-/etc/docker-backup/config.yml}"
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# 临时目录
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TEMP_DIR=""
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# 颜色输出
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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NC='\033[0m' # No Color
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###############################################################################
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# 日志函数
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###############################################################################
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log() {
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local level=$1
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shift
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local message="$@"
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local timestamp=$(date '+%Y-%m-%d %H:%M:%S')
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# 输出到 stderr，避免干扰函数返回值
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echo -e "[${timestamp}] [${level}] ${message}" >&2
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# 如果配置了日志文件，同时写入文件
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if [[ -n "${LOG_FILE}" ]] && [[ "${LOGGING_ENABLED}" == "true" ]]; then
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echo "[${timestamp}] [${level}] ${message}" >> "${LOG_FILE}"
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fi
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}
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log_info() {
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log "INFO" "${GREEN}$@${NC}"
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}
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log_warn() {
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log "WARN" "${YELLOW}$@${NC}"
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}
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log_error() {
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log "ERROR" "${RED}$@${NC}"
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}
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###############################################################################
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# 清理函数
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###############################################################################
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cleanup() {
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if [[ -n "${TEMP_DIR}" ]] && [[ -d "${TEMP_DIR}" ]]; then
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log_info "清理临时目录: ${TEMP_DIR}"
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rm -rf "${TEMP_DIR}"
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fi
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}
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# 注册清理函数
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trap cleanup EXIT INT TERM
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###############################################################################
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# 检查依赖
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###############################################################################
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check_dependencies() {
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log_info "检查依赖工具..."
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local missing_deps=()
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# 检查 yq
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if ! command -v yq &> /dev/null; then
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missing_deps+=("yq")
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fi
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# 检查 tar
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if ! command -v tar &> /dev/null; then
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missing_deps+=("tar")
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fi
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# 检查 gzip
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if ! command -v gzip &> /dev/null; then
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missing_deps+=("gzip")
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fi
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# 检查 docker
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if ! command -v docker &> /dev/null; then
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missing_deps+=("docker")
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fi
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if [[ ${#missing_deps[@]} -gt 0 ]]; then
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log_error "缺少以下依赖工具: ${missing_deps[*]}"
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log_error "请运行 install.sh 安装依赖"
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exit 1
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fi
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log_info "依赖检查完成"
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}
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###############################################################################
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# 加载配置
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###############################################################################
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load_config() {
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log_info "加载配置文件: ${CONFIG_FILE}"
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if [[ ! -f "${CONFIG_FILE}" ]]; then
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log_error "配置文件不存在: ${CONFIG_FILE}"
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exit 1
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fi
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# 读取备份基础配置
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OUTPUT_DIR=$(yq eval '.backup.output_dir' "${CONFIG_FILE}")
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BACKUP_PREFIX=$(yq eval '.backup.prefix' "${CONFIG_FILE}")
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# 读取清理策略
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RETENTION_ENABLED=$(yq eval '.backup.retention.enabled' "${CONFIG_FILE}")
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KEEP_DAYS=$(yq eval '.backup.retention.keep_days' "${CONFIG_FILE}")
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# 读取文件夹备份配置
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FOLDERS_ENABLED=$(yq eval '.folders.enabled' "${CONFIG_FILE}")
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# 读取 MySQL 配置
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MYSQL_ENABLED=$(yq eval '.mysql.enabled' "${CONFIG_FILE}")
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MYSQL_CONTAINER=$(yq eval '.mysql.container_name' "${CONFIG_FILE}")
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MYSQL_USERNAME=$(yq eval '.mysql.username' "${CONFIG_FILE}")
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MYSQL_PASSWORD=$(yq eval '.mysql.password' "${CONFIG_FILE}")
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# 读取日志配置
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LOGGING_ENABLED=$(yq eval '.logging.enabled' "${CONFIG_FILE}")
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LOG_FILE=$(yq eval '.logging.log_file' "${CONFIG_FILE}")
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# 创建输出目录
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mkdir -p "${OUTPUT_DIR}"
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# 创建日志目录
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if [[ "${LOGGING_ENABLED}" == "true" ]] && [[ -n "${LOG_FILE}" ]]; then
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mkdir -p "$(dirname "${LOG_FILE}")"
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fi
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log_info "配置加载完成"
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}
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###############################################################################
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# 备份文件夹
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###############################################################################
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backup_folders() {
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if [[ "${FOLDERS_ENABLED}" != "true" ]]; then
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log_info "文件夹备份未启用，跳过"
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return 0
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fi
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log_info "开始备份文件夹..."
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# 创建临时目录
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local temp_backup_dir="${TEMP_DIR}/folders"
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mkdir -p "${temp_backup_dir}"
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# 获取要备份的文件夹数量
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local source_count=$(yq eval '.folders.sources | length' "${CONFIG_FILE}")
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if [[ "${source_count}" == "0" ]] || [[ "${source_count}" == "null" ]]; then
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log_warn "未配置要备份的文件夹"
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return 0
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fi
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# 构建排除参数
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local exclude_args=""
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local exclude_count=$(yq eval '.folders.excludes | length' "${CONFIG_FILE}")
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if [[ "${exclude_count}" != "0" ]] && [[ "${exclude_count}" != "null" ]]; then
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for i in $(seq 0 $((exclude_count - 1))); do
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local exclude_pattern=$(yq eval ".folders.excludes[$i]" "${CONFIG_FILE}")
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exclude_args+=" --exclude='${exclude_pattern}'"
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done
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fi
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# 备份每个文件夹
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local folders_tar="${temp_backup_dir}/folders.tar.gz"
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local tar_sources=""
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for i in $(seq 0 $((source_count - 1))); do
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local source_dir=$(yq eval ".folders.sources[$i]" "${CONFIG_FILE}")
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if [[ ! -d "${source_dir}" ]]; then
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log_warn "源目录不存在，跳过: ${source_dir}"
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continue
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fi
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tar_sources+=" ${source_dir}"
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log_info "添加备份源: ${source_dir}"
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done
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if [[ -z "${tar_sources}" ]]; then
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log_warn "没有有效的备份源目录"
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return 0
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fi
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# 执行打包
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log_info "开始打包文件夹..."
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log_info "排除规则: ${exclude_args}"
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# 将 tar 输出重定向到 stderr，避免干扰函数返回值
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if eval "tar -czf '${folders_tar}' ${exclude_args} ${tar_sources}" 2>&1 >&2; then
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local tar_size=$(du -h "${folders_tar}" | cut -f1)
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log_info "文件夹备份完成: ${folders_tar} (大小: ${tar_size})"
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echo "${folders_tar}"
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else
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log_error "文件夹备份失败"
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return 1
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fi
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}
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###############################################################################
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# 备份 MySQL 数据库
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###############################################################################
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backup_mysql() {
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if [[ "${MYSQL_ENABLED}" != "true" ]]; then
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log_info "MySQL 备份未启用，跳过"
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return 0
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fi
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log_info "开始备份 MySQL 数据库..."
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# 检查容器是否存在且运行中
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if ! docker ps --format '{{.Names}}' | grep -q "^${MYSQL_CONTAINER}$"; then
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log_error "MySQL 容器不存在或未运行: ${MYSQL_CONTAINER}"
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return 1
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fi
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# 创建临时目录
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local temp_mysql_dir="${TEMP_DIR}/mysql"
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mkdir -p "${temp_mysql_dir}"
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# 获取要备份的数据库列表
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local databases=$(yq eval '.mysql.databases' "${CONFIG_FILE}")
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local mysql_dump="${temp_mysql_dir}/mysql.sql.gz"
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if [[ "${databases}" == "all" ]] || [[ "${databases}" == "null" ]]; then
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# 备份所有数据库
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log_info "备份所有数据库..."
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docker exec "${MYSQL_CONTAINER}" mysqldump \
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--single-transaction \
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--quick \
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--skip-lock-tables \
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-u"${MYSQL_USERNAME}" \
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-p"${MYSQL_PASSWORD}" \
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--all-databases \
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| gzip > "${mysql_dump}"
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else
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# 备份指定数据库
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local db_count=$(yq eval '.mysql.databases | length' "${CONFIG_FILE}")
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local db_list=""
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for i in $(seq 0 $((db_count - 1))); do
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local db_name=$(yq eval ".mysql.databases[$i]" "${CONFIG_FILE}")
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db_list+=" ${db_name}"
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log_info "添加数据库: ${db_name}"
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done
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log_info "备份数据库: ${db_list}"
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docker exec "${MYSQL_CONTAINER}" mysqldump \
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--single-transaction \
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--quick \
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--skip-lock-tables \
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-u"${MYSQL_USERNAME}" \
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-p"${MYSQL_PASSWORD}" \
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--databases ${db_list} \
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| gzip > "${mysql_dump}"
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fi
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if [[ -f "${mysql_dump}" ]]; then
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log_info "MySQL 备份完成: ${mysql_dump}"
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echo "${mysql_dump}"
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else
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log_error "MySQL 备份失败"
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return 1
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fi
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}
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###############################################################################
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# 合并备份文件
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###############################################################################
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merge_backups() {
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local folders_tar=$1
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local mysql_dump=$2
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log_info "开始合并备份文件..."
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# 生成时间戳
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local timestamp=$(date '+%Y%m%d-%H%M%S')
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local final_backup="${OUTPUT_DIR}/${BACKUP_PREFIX}-${timestamp}.tar.gz"
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# 要打包的文件列表
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local files_to_pack=""
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if [[ -n "${folders_tar}" ]] && [[ -f "${folders_tar}" ]]; then
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files_to_pack+=" ${folders_tar}"
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fi
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if [[ -n "${mysql_dump}" ]] && [[ -f "${mysql_dump}" ]]; then
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files_to_pack+=" ${mysql_dump}"
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fi
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if [[ -z "${files_to_pack}" ]]; then
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log_error "没有需要打包的文件"
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return 1
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fi
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# 合并打包
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# 构建相对于 TEMP_DIR 的路径列表
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local files_list=""
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if [[ -n "${folders_tar}" ]] && [[ -f "${folders_tar}" ]]; then
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files_list+=" ${folders_tar#${TEMP_DIR}/}"
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log_info "添加到合并: ${folders_tar#${TEMP_DIR}/} ($(du -h "${folders_tar}" | cut -f1))"
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fi
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if [[ -n "${mysql_dump}" ]] && [[ -f "${mysql_dump}" ]]; then
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files_list+=" ${mysql_dump#${TEMP_DIR}/}"
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log_info "添加到合并: ${mysql_dump#${TEMP_DIR}/} ($(du -h "${mysql_dump}" | cut -f1))"
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fi
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log_info "执行合并打包..."
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if ! tar -czf "${final_backup}" -C "${TEMP_DIR}" ${files_list} 2>&1; then
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log_error "tar 合并命令执行失败"
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return 1
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fi
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if [[ -f "${final_backup}" ]]; then
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local file_size=$(du -h "${final_backup}" | cut -f1)
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log_info "备份完成: ${final_backup} (大小: ${file_size})"
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echo "${final_backup}"
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else
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log_error "合并备份失败"
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return 1
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fi
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}
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###############################################################################
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# 清理旧备份
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###############################################################################
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cleanup_old_backups() {
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if [[ "${RETENTION_ENABLED}" != "true" ]]; then
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log_info "自动清理未启用，跳过"
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return 0
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fi
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log_info "开始清理旧备份..."
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if [[ "${KEEP_DAYS}" != "null" ]] && [[ "${KEEP_DAYS}" =~ ^[0-9]+$ ]]; then
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log_info "删除 ${KEEP_DAYS} 天前的备份文件..."
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# 查找并删除旧文件
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find "${OUTPUT_DIR}" -name "${BACKUP_PREFIX}-*.tar.gz" -type f -mtime +${KEEP_DAYS} -print | while read old_file; do
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log_info "删除旧备份: ${old_file}"
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rm -f "${old_file}"
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done
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fi
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log_info "清理完成"
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}
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###############################################################################
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# 主函数
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###############################################################################
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main() {
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log_info "=========================================="
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log_info "Docker Backup 开始执行"
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log_info "=========================================="
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# 检查依赖
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check_dependencies
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# 加载配置
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load_config
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# 创建临时目录
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TEMP_DIR=$(mktemp -d -t docker-backup.XXXXXX)
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log_info "临时目录: ${TEMP_DIR}"
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# 备份文件夹
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local folders_tar=$(backup_folders)
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# 备份 MySQL
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local mysql_dump=$(backup_mysql)
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# 合并备份
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local final_backup=$(merge_backups "${folders_tar}" "${mysql_dump}")
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# 清理旧备份
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cleanup_old_backups
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log_info "=========================================="
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log_info "Docker Backup 执行完成"
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log_info "备份文件: ${final_backup}"
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log_info "=========================================="
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}
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# 执行主函数
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main "$@"
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