I was working on creating containers in pods, reproducing this issue when I stumbled on a dependency issue, which disallowed me to create the container in the pod. Whenever I ran the container in the pod it returned that it could not get the namespace as the infra container had exited. When logging the infra container it showed me

$ bin/podman logs <infra-container-id>
/catatonit: invalid option -- 'P'
usage: catatonit [-ghLV] [--] <progname>
$ catatonit --version
tini version 0.1.5_catatonit

Apperently catatonit was already installed using apt (ubuntu 21.10), which only serves 0.1.5, and I therefore needed to do a manual installation to 0.1.7 which contains the -P flag, which after a clean and make made it work again. I could not find this dependency anywhere on the website however, which maybe is relevant to put somewhere.