<p>I'm having issues with kubelet removing docker images because it believes the disk is full:</p>
<pre><code>Dec 29 18:00:14 hostname kubelet: I1229 18:00:14.548513   13836 image_gc_manager.go:300] [imageGCManager]: Disk usage on image filesystem is at 85% which is over the high threshold (85%). Trying to free 2160300032 bytes down to the low threshold (80%).
</code></pre>
<p>However, the partition that docker uses is 1TB and has plenty of space:</p>
<pre><code>$ docker info
...
Docker Root Dir: /scratch/docker

$ df -k /scratch
Filesystem     1K-blocks      Used Available Use% Mounted on
/dev/sda1      976283900 234476968 741806932  25% /scratch
</code></pre>
<p>It seems kubelet is finding the disk usage for my main partition on <code>/</code>, which also happens to be the partition kubelet itself is installed on:</p>
<pre><code>$ df -k /
Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/nvme0n1p2  52403200 44032936   8370264  85% /
</code></pre>
<p>So where does kubelet get information about available disk space? I assumed it was using the docker daemon, but based on what I'm seeing the two apps are looking at different partitions. Is there a configuration I can set, or is does it just default to its own partition when doing the disk space check?</p>
<p>This is using Kubernetes 1.17.4 on RedHat 7 and docker 18.06.</p>

<p>There's a lot of weird edge case bugs in there, see <a href="https://github.com/kubernetes/kubernetes/issues/66961" rel="nofollow noreferrer">https://github.com/kubernetes/kubernetes/issues/66961</a> as a starting point.</p>
