https://help.aliyun.com/knowledge_detail/48226.html?spm=5176.2020520101.0.0.315b4df54yEHqJ

阿里官方文档纸制自定义镜像方式，看看就好，严格按照文档没法搞，尤其是
低内核的系统

从virtual machine导出ova镜像
镜像上传ecs云服务器
将ova镜像转成raw镜像
mv centos7-gcc4.9.4-orig.ova centos7-gcc4.9.4-orig.tar
tar xf centos7-gcc4.9.4-orig.tar
qemu-img convert -f vmdk -O raw centos7-gcc4.9.4-disk1.vmdk centos7.raw
挂载oss
yum install automake gcc-c++ git libcurl-devel libxml2-devel fuse-devel make openssl-devel
git clone https://github.com/aliyun/ossfs.git
cd ossfs
./autogen.sh
./configure
make
echo bucket名:AK:SK > /etc/passwd-ossfs
chmod 640 /etc/passwd-ossfs
mkdir /oss_bucket
ossfs bucket名 /oss_bucket -ourl=http://oss内网地址
将raw镜像拷贝到oss
cp centos7.raw /oss_bucket
卸载oss
umount /oss_bucket

阿里云控制台=>云服务器=>实例与镜像=>镜像=>导入镜像->手动导入
按照提示填写

选择一台ecs重装自制镜像