I have set additionalimagestores. The article is
https://www.redhat.com/sysadmin/image-stores-podman.
If I run the image which R/O is true, like the following error.
$ podman run --rm --userns=keep-id 35f88cfae40f echo "hello"
Error: runc: runc create failed: unable to start container process: exec:
"echo": executable file not found in $PATH: OCI runtime attempted to invoke a
command that was not found
If run it without --userns=keep-id, it runs right.
If run the image which R/O is false, it runs right.
$ podman images
REPOSITORY TAG IMAGE ID CREATED SIZE R/O
registry.cloud.com/vasp 544-test 35f88cfae40f 11 hours ago 12.5 GB true