<p>I am trying to debug the storage usage in my kubernetes pod. I have seen the pod is evicted because of Disk Pressure.  When i login to running pod, the see the following </p>

<pre><code>Filesystem      Size  Used Avail Use% Mounted on
overlay          30G   21G  8.8G  70% /
tmpfs            64M     0   64M   0% /dev
tmpfs            14G     0   14G   0% /sys/fs/cgroup
/dev/sda1        30G   21G  8.8G  70% /etc/hosts
shm              64M     0   64M   0% /dev/shm
tmpfs            14G   12K   14G   1% /run/secrets/kubernetes.io/serviceaccount
tmpfs            14G     0   14G   0% /proc/acpi
tmpfs            14G     0   14G   0% /proc/scsi
tmpfs            14G     0   14G   0% /sys/firmware
root@deploy-9f45856c7-wx9hj:/# du -sh /
du: cannot access '/proc/1142/task/1142/fd/3': No such file or directory
du: cannot access '/proc/1142/task/1142/fdinfo/3': No such file or directory
du: cannot access '/proc/1142/fd/4': No such file or directory
du: cannot access '/proc/1142/fdinfo/4': No such file or directory
227M    /
root@deploy-9f45856c7-wx9hj:/# du -sh /tmp
11M /tmp
root@deploy-9f45856c7-wx9hj:/# du -sh /dev
0   /dev
root@deploy-9f45856c7-wx9hj:/# du -sh /sys
0   /sys
root@deploy-9f45856c7-wx9hj:/# du -sh /etc
1.5M    /etc
root@deploy-9f45856c7-wx9hj:/# 

</code></pre>

<p>As we can see 21G is consumed, but when i try to run <code>du -sh</code> it just returns 227M. I would like to find out who(which directory) is consuming the space</p>

<p>According to the docs <a href="https://github.com/kubernetes/website/blob/master/content/en/docs/tasks/administer-cluster/out-of-resource.md#node-conditions" rel="nofollow noreferrer">Node Conditions</a>, <code>DiskPressure</code> has to do with conditions on the node causing kubelet to evict the pod. It doesn't necessarily mean it's the pod that caused the conditions. </p>

<blockquote>
  <p>DiskPressure</p>
  
  <p>Available disk space and inodes on either the node’s root filesystem
  or image filesystem has satisfied an eviction threshold</p>
</blockquote>

<p>You may want to investigate what's happening on the node instead. </p>
