I tested lithops with a Rancher installation by e-INFRA CZ for the EGI federation.

I don't know if all Rancher installations are the same, but this one expects containers to meet some security requirements, such as non root execution and no privilege escalation.

I managed to create K8s jobs with lithops ont this platform after modifying the JOB_DEFAULT variable in lithops/serverles/backends/k8s/config.py with the lines :

      securityContext:
        allowPrivilegeEscalation: false
        runAsNonRoot: true
        runAsUser: 1000
        capabilities:
          drop: ["ALL"]
        seccompProfile:
          type: "RuntimeDefault"

I guess that this workaround is not the right way to configure lithops with kubernetes, so I don't propose this as a pull request.