podman/docs/source/markdown/options/pid.md

--pid=mode

Set the PID namespace mode for the container. The default is to create a private PID namespace for the container.

• container:id: join another container's PID namespace;
• host: use the host's PID namespace for the container. Note the host mode gives the container full access to local PID and is therefore considered insecure;
• ns:path: join the specified PID namespace;
• private: create a new namespace for the container (default).