find ephemeral files in pod

Some pods doesn’t have a shell, can not exec to them ,but you can use crictl too get container root path and access to ephemeral files.

$ sudo crictl pods 638b22461c517 |grep web-1
638b22461c517  10 days ago  Ready  web-1
$ 
$ sudo crictl ps |grep 638b22461c517 
03d161d503206       registry.k8s.io/nginx-slim  10 days ago  Running  nginx  0  638b22461c517
$ 
$ sudo crictl exec -it 03d161d503206 bash -c 'mkdir /test101'
$ 
$ sudo crictl inspect 03d161d503206 | jq  -r  .info.runtimeSpec.root[]
/var/lib/containers/storage/overlay/84f0ce1419c04852c596e942c673464bbd86ea154f6a57c1859743015f83975a/merged
$ 
$ ls -l /var/lib/containers/storage/overlay/84f0ce1419c04852c596e942c673464bbd86ea154f6a57c1859743015f83975a/merged/../diff/
total 20
drwx------ 2 root root 4096 Dec 18 15:50 root
drwxr-xr-x 3 root root 4096 Dec  7 16:21 run
drwxr-xr-x 2 root root 4096 Dec 18 15:51 test101
drwxr-xr-x 4 root root 4096 Dec 18 15:50 var

If Google bring you to here, hope you find the answer.