查看k8s内PV的使用比例

kg pods
NAME                                       READY   STATUS    RESTARTS      AGE
postgres-0                                 1/1     Running   0             45h

kubectl exec -it postgres-0 -- /bin/bash
root@postgres-0:/# 


df -h
Filesystem      Size  Used Avail Use% Mounted on
overlay         116G   13G   98G  12% /
tmpfs            64M     0   64M   0% /dev
tmpfs           7.6G     0  7.6G   0% /sys/fs/cgroup
shm              64M   16K   64M   1% /dev/shm
/dev/vdb        116G   13G   98G  12% /etc/hosts
/dev/vdf         20G  104M   20G   1% /var/lib/postgresql/data
tmpfs            13G   12K   13G   1% /run/secrets/kubernetes.io/serviceaccount
tmpfs           7.6G     0  7.6G   0% /proc/acpi
tmpfs           7.6G     0  7.6G   0% /proc/scsi
tmpfs           7.6G     0  7.6G   0% /sys/firmware