From aeeb63d92f937d9e9bc5579986e084e3554f7014 Mon Sep 17 00:00:00 2001
From: cnphpbb <moqiruyi@gmail.com>
Date: Sun, 27 Apr 2025 09:50:40 +0800
Subject: [PATCH] =?UTF-8?q?feat(mysql):=20=E6=B7=BB=E5=8A=A0printDBS.sh?=
 =?UTF-8?q?=E8=84=9A=E6=9C=AC=E4=BB=A5=E5=88=97=E5=87=BA=E9=9C=80=E8=A6=81?=
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该脚本用于列出MySQL中需要备份的数据库，并可选地显示每个数据库的大小。通过临时配置文件处理MySQL连接信息，并支持排除系统数据库。提供了命令行选项以便用户选择列出数据库或数据库及其大小。
---
 crontab/mysql/printDBS.sh | 80 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 crontab/mysql/printDBS.sh

diff --git a/crontab/mysql/printDBS.sh b/crontab/mysql/printDBS.sh
new file mode 100644
index 0000000..8654257
--- /dev/null
+++ b/crontab/mysql/printDBS.sh
@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+
+# MySQL 用户名、密码、主机和端口
+MYSQL_USER=${MYSQL_USER}
+MYSQL_PASSWORD=${MYSQL_PASSWORD}
+MYSQL_HOST=${MYSQL_HOST}
+MYSQL_PORT="3306"
+
+# 不需要备份的数据库列表
+EXCLUDE_DATABASES=("information_schema" "performance_schema" "mysql" "sys")
+
+# 创建临时配置文件
+MYSQL_CONFIG=${HOME}/mysql.cnf
+cat > $MYSQL_CONFIG <<EOF
+[client]
+user=${MYSQL_USER}
+password=${MYSQL_PASSWORD}
+host=${MYSQL_HOST}
+port=${MYSQL_PORT}
+EOF
+
+# 获取所有数据库并过滤
+DATABASES=$(mysql --defaults-extra-file=$MYSQL_CONFIG --silent -e "SHOW DATABASES;" | grep -Ev "^Database$|^($(IFS="|"; echo "${EXCLUDE_DATABASES[*]}"))$")
+
+# 打印数据库列表
+echoDBS() {
+    echo "需要备份的数据库: "
+    # 使用for循环打印过滤后的数据库
+    for db in ${DATABASES}; do
+        echo "${db}"
+    done
+    # 删除临时文件
+    rm -f $MYSQL_CONFIG
+}
+
+# 打印数据库及其大小
+echoDBSSize() {
+    echo "需要备份的数据库及其大小: "
+    local TOTAL_SIZE=0
+    # 使用for循环打印过滤后的数据库及其大小
+    for db in ${DATABASES}; do
+        SIZE=$(mysql --defaults-extra-file=$MYSQL_CONFIG --silent -e "SELECT IFNULL(ROUND(SUM(data_length + index_length) / 1024 / 1024, 2), 0) AS 'Size (MB)' FROM information_schema.TABLES WHERE table_schema = '${db}';" | grep -v "Size (MB)")
+        echo "${db} - ${SIZE} MB"
+        TOTAL_SIZE=$(echo "$TOTAL_SIZE + $SIZE" | bc)
+    done
+    echo "-------------------------"
+    TOTAL_SIZE_GB=$(echo "scale=2; $TOTAL_SIZE / 1024" | bc)
+    echo "总大小: ${TOTAL_SIZE} MB (${TOTAL_SIZE_GB} GB)"
+    # 删除临时文件
+    rm -f $MYSQL_CONFIG
+}
+
+help() {
+    echo "使用方法:"
+    echo "  $(basename "$0") [选项]"
+    echo ""
+    echo "选项:"
+    echo "  -l, --list      列出需要备份的数据库"
+    echo "  -s, --size      列出需要备份的数据库及其大小"
+    echo "  -h, --help      显示帮助信息"
+}
+
+# 处理输入参数
+case "$1" in
+    -l|--list)
+        echoDBS
+        ;;
+    -s|--size)
+        echoDBSSize
+        ;;
+    -h|--help)
+        help
+        ;;
+    *)
+        echo "错误: 未知参数 '$1'"
+        help
+        exit 1
+        ;;
+esac
+