阿里云centos7在线扩容磁盘,不需重启
安装growpart扩容格式化工具。
yum install cloud-utils-growpart
运行fdisk -l命令查看现有云盘大小。
运行df -h命令查看云盘分区大小。
运行growpart 命令调用growpart为需要扩容的云盘和对应的第几个分区扩容
运行df -h命令查看云盘分区大小。返回分区（/dev/vda1）容量是100GiB，表示已经成功扩容
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!
