1、下载安装地址：
wget https://github.com/yashbhutwala/kubectl-df-pv/releases/download/v0.3.0/kubectl-df-pv_v0.3.0_linux_amd64.tar.gz
tar -xvf kubectl-df-pv_v0.3.0_linux_amd64.tar.gz
mv df-pv /usr/local/sbin/
2、查看帮助，查看容量情况
df-pv --help
df-pv -v info -n kube-system
