forked from DevOps/deploy.stack
74 lines
2.3 KiB
Bash
74 lines
2.3 KiB
Bash
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#!/bin/bash
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# PostgreSQL 备份脚本
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# 配置参数
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DB_HOST=${PGSQL_HOST}
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DB_PORT=${PGSQL_PORT}
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DB_USER=${PGSQL_USER}
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DB_PASSWORD=${PGSQL_PASSWORD}
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DOCKER_IMAGE="postgres:latest"
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# 备份目录设置
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BACKUP_DIR="/data/backups/posrgres/$(date +%Y)/$(date +%Y%m)"
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DATE=$(date +%Y%m%d_%H%M%S)
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# 创建备份目录
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mkdir -p "$BACKUP_DIR"
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# 获取用户可以访问的所有数据库列表
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echo "获取可访问数据库列表..."
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DB_LIST=$(docker run --rm \
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-e PGPASSWORD="${DB_PASSWORD}" \
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"${DOCKER_IMAGE}" \
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psql -h "${DB_HOST}" -p "${DB_PORT}" -U "${DB_USER}" -d postgres -t -c "SELECT datname FROM pg_database WHERE datname NOT IN ('template0', 'template1', 'postgres') AND datistemplate = false;")
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# 检查数据库列表
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if [ -z "$DB_LIST" ]; then
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echo "没有找到可备份的数据库"
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exit 1
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fi
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# 备份每个数据库
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for DB_NAME in $DB_LIST; do
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echo "开始备份数据库 ${DB_NAME}..."
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BACKUP_FILE="${BACKUP_DIR}/${DB_NAME}_${DATE}.sql"
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docker run --rm \
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-e PGPASSWORD="${DB_PASSWORD}" \
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-v "${BACKUP_DIR}:/backups" \
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"${DOCKER_IMAGE}" \
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pg_dump -h "${DB_HOST}" -p "${DB_PORT}" -U "${DB_USER}" -d "${DB_NAME}" \
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--no-password \
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--clean \
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--if-exists \
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-f "/backups/${DB_NAME}_${DATE}.sql"
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if [ $? -eq 0 ]; then
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echo "备份成功: ${BACKUP_FILE}"
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else
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echo "备份失败: ${DB_NAME}"
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fi
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done
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# 保留本月的最近7天备份
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find "$BACKUP_DIR" -name "*_*.sql" -mtime +7 -type f -exec rm -f {} \;
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# 删除非本年&本月的备份目录(仅在每月2号执行)
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if [ $(date +%d) -eq 2 ]; then
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CURRENT_YEAR=$(date +%Y)
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CURRENT_MONTH=$(date +%m)
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find "/data/backups/posrgres/" -maxdepth 1 -type d -name "20*" | while read -r year_dir; do
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year=$(basename "$year_dir")
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if [ "$year" != "$CURRENT_YEAR" ]; then
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echo "删除非本年目录: $year_dir"
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rm -rf "$year_dir"
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else
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find "$year_dir" -maxdepth 1 -type d -name "20*" | while read -r month_dir; do
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month=$(basename "$month_dir" | cut -c5-6)
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if [ "$month" != "$CURRENT_MONTH" ]; then
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echo "删除非本月目录: $month_dir"
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rm -rf "$month_dir"
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fi
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done
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fi
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done
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fi
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