Hello,
I was curious what is and isn’t included in the pods ephemeral-storage? I know it’s described here. The issue though is it doesn’t necessarily specify the particulars.
For example if container images are stored in /var/lib/containerd/io.containerd.content.v1.content and the lowerdir, upperdir and workingdir of snapshotter are at /var/lib/containerd/io.containerd.snapshotter.v1.overlayfs. Then when those directories are mounted via overlayFS to something like run/containerd/io.containerd.runtime.v2.task/k8s.io/6fb87d2504f046f4cf5269e62ef7e4360baf0570b2acf8effcdd642/rootfs. If you do a du on that rootfs you will get a size that well appoximates the sum of the sub pieces. But overlayFS is supposed to layer things so that if all containers have a common base then it doesn’t duplicate space.
So my question is, when looking at ephemeral-storage. Is this full size found in run/containerd/io.containerd.runtime.v2.task/k8s.io/<hash> part of the ephemeral storage?
Looking at that directory
bash-5.1# pwd
/run/containerd/io.containerd.runtime.v2.task/k8s.io/6fb87d2504f046f4cf5269e60baf0570b2acf8effcdd642
bash-5.1# du -hs *
4.0K address
296K config.json
4.0K init.pid
0 log
0 log.json
4.0K options.json
1.8G rootfs
4.0K runtime
4.0K shim-binary-path
0 work
any tips or advice would be appreciated. Thank you.