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2026-09-21 19:21:35 +08:00
commit 6c944c4ffd
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+#!/bin/bash
+# MySQL 数据卷迁移脚本
+# 将旧自动命名卷的数据复制到 external 卷 changzhou_mysql_data
+# 用法：bash migrate-mysql-volume.sh [旧卷名]
+#   不传参数时自动检测 docker_changzhou_mysql_data 和 docker-cn_changzhou_mysql_data
+
+set -e
+
+NEW_VOL="changzhou_mysql_data"
+IMAGE="mysql:8.0.24"
+
+# 自动检测旧卷名
+if [ -n "$1" ]; then
+    OLD_VOL="$1"
+else
+    for candidate in docker_changzhou_mysql_data docker-cn_changzhou_mysql_data; do
+        if docker volume inspect "$candidate" >/dev/null 2>&1; then
+            OLD_VOL="$candidate"
+            break
+        fi
+    done
+fi
+
+if [ -z "$OLD_VOL" ]; then
+    echo "ERROR: 未找到旧数据卷，请手动指定：bash migrate-mysql-volume.sh <旧卷名>"
+    echo "可用的卷列表："
+    docker volume ls --format '  {{.Name}}' | grep -i mysql || echo "  (无 mysql 相关卷)"
+    exit 1
+fi
+
+# 检查新卷是否存在
+if ! docker volume inspect "$NEW_VOL" >/dev/null 2>&1; then
+    echo "创建 external 卷: $NEW_VOL"
+    docker volume create "$NEW_VOL"
+fi
+
+# 检查旧卷数据大小
+OLD_SIZE=$(docker run --rm -v "${OLD_VOL}:/data" "$IMAGE" sh -c "du -sh /data" 2>/dev/null | awk '{print $1}')
+echo "旧卷 $OLD_VOL 数据量: $OLD_SIZE"
+
+# 停掉 MySQL 容器（如果在运行）
+if docker inspect mysql_db >/dev/null 2>&1; then
+    echo "停止 MySQL 容器..."
+    docker stop mysql_db 2>/dev/null || true
+fi
+
+# 清空新卷（避免数据叠加）
+echo "清空新卷 $NEW_VOL ..."
+docker volume rm "$NEW_VOL" >/dev/null
+docker volume create "$NEW_VOL" >/dev/null
+
+# 复制数据
+echo "开始迁移 $OLD_VOL -> $NEW_VOL ..."
+docker run --rm \
+    -v "${OLD_VOL}:/from" \
+    -v "${NEW_VOL}:/to" \
+    "$IMAGE" \
+    sh -c "cp -a /from/. /to/"
+
+# 验证
+NEW_SIZE=$(docker run --rm -v "${NEW_VOL}:/data" "$IMAGE" sh -c "du -sh /data" 2>/dev/null | awk '{print $1}')
+echo "新卷 $NEW_VOL 数据量: $NEW_SIZE"
+echo "迁移完成！旧卷 $OLD_VOL 保留作为备份。"