50 lines
1.6 KiB
Bash
50 lines
1.6 KiB
Bash
#!/bin/bash
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# ============================================
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# 丹阳公益婚恋服务平台 — PostgreSQL 备份脚本
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# ============================================
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# 用法：
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# ./scripts/backup.sh # 备份全部数据库
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# ./scripts/backup.sh danyang_match # 备份指定库
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# ./scripts/backup.sh --daily # 仅保留最近7天的备份
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# ============================================
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set -euo pipefail
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DB_NAME="${1:-danyang_match}"
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BACKUP_DIR="${BACKUP_DIR:-/app/backups}"
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RETENTION_DAYS="${RETENTION_DAYS:-30}"
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TIMESTAMP=$(date +%Y%m%d_%H%M%S)
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BACKUP_FILE="${BACKUP_DIR}/${DB_NAME}_${TIMESTAMP}.sql.gz"
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] 开始备份: ${DB_NAME}"
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# 创建备份目录
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mkdir -p "${BACKUP_DIR}"
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# 执行备份
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pg_dump \
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-h "${DB_HOST:-postgres}" \
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-U "${DB_USER:-danyang}" \
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-d "${DB_NAME}" \
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--no-owner \
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--no-privileges \
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--clean \
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--if-exists \
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--inserts \
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| gzip > "${BACKUP_FILE}"
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] 备份完成: ${BACKUP_FILE}"
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] 文件大小: $(du -h "${BACKUP_FILE}" | cut -f1)"
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# 清理过期备份
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find "${BACKUP_DIR}" -name "${DB_NAME}_*.sql.gz" -mtime +${RETENTION_DAYS} -delete
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] 已清理 ${RETENTION_DAYS} 天前的备份"
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# 保留最近 N 份（防止误删）
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BACKUP_COUNT=$(ls -1 "${BACKUP_DIR}"/${DB_NAME}_*.sql.gz 2>/dev/null | wc -l)
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if [ "${BACKUP_COUNT}" -gt 10 ]; then
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ls -1t "${BACKUP_DIR}"/${DB_NAME}_*.sql.gz | tail -n +11 | xargs rm -f
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] 保留最近10份备份，其余已清理"
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fi
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] 备份任务完成"
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