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