uid_map limit workaround

[micha2025]

Hello, my nested container that I want to be running podman in rootless mode has available only 65536 uid/gid.

cat /proc/self/uid_map                              
         0     100000      65536

So I can't give namespace range 100000-165536 to my user as documentation recommends.
I would rather like to avoid increasing number of uid/gid in my container, is there any workaround?
I tried to put into /etc/subuid and /etc/subgid this:

user:1100:64436 

But it doesn't seem to be working.
Is there any workaround for this problem?

[eriksjolund]

as documentation recommends.

Are you referring to troubleshooting tip 10 rootless setup user: invalid argument?

If you want to map a very high container UID and GID ( $uid:$gid) to the regular user on the host you can
add --userns=keep-id:uid=$uid,gid=$gid

$ uid=1000000
$ gid=1000000
$ podman run --rm --userns=keep-id:uid=$uid,gid=$gid --user $uid:$gid alpine id
uid=1000000(1000000) gid=1000000(1000000) groups=1000000(1000000)