1、下載安裝地址：
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、檢視幫助，檢視容量情況
df-pv --help
df-pv -v info -n kube-system