Keycloak on Podman guide doesn't work for 9.0.3

I followed the first line and get

$ podman run -p 8080:8080 -e KEYCLOAK_USER=admin -e KEYCLOAK_PASSWORD=admin
Added 'admin' to '/opt/jboss/keycloak/standalone/configuration/keycloak-add-user.json', restart server to load user
/opt/jboss/tools/ line 156: DB_ADDR: unbound variable

How did you solve the problem? I have the same one with Docker and Keycload 15.0.2

This is due to the „auto magic“ of the container trying to detect the database used. There‘s most likely some hostname in your DNS responding to the search of the script in the container.
Set the env var DB_VENDOR=h2 and the container uses the internal h2 DB.