return StringUtil.EMPTY;
    }

    /**
     * Gets the override configuration path from environment variable when running in Docker.
     * This allows customization of the configuration directory location in containerized deployments.
     *
     * @return an OptionalEntity containing the override configuration path if set and running in Docker,
     *         or empty OptionalEntity otherwise
     */

* ScaleIO driver completely removes dependency on drv_cfg binary so a Kubernetes cluster can easily run a containerized kubelet. ([#54956](https://github.com/kubernetes/kubernetes/pull/54956), [@vladimirvivien](https://github.com/vladimirvivien))



# v1.8.3

- Integration testing now takes periodic Prometheus scrapes from the etcd server.
  There is a new script ,`hack/run-prometheus-on-etcd-scrapes.sh`, that runs a containerized Prometheus server against an archive of such scrapes. ([#106190](https://github.com/kubernetes/kubernetes/pull/106190), [@MikeSpreitzer](https://github.com/MikeSpreitzer)) [SIG API Machinery and Testing]

  - Removed deprecated flag `--include-uninitialized`. ([#80337](https://github.com/kubernetes/kubernetes/pull/80337), [@draveness](https://github.com/draveness))

- kubelet

  - the `--containerized` flag was deprecated in 1.14 and has been removed ([#80043](https://github.com/kubernetes/kubernetes/pull/80043), [@dims](https://github.com/dims))

- Fixed race condition in GCE between containerized mounter setup in the kubelet. ([#112195](https://github.com/kubernetes/kubernetes/pull/112195), [@mattcary](https://github.com/mattcary))

- The kubelet now creates an iptables chain named `KUBE-IPTABLES-HINT` in
  the `mangle` table. Containerized components that need to modify iptables
  rules in the host network namespace can use the existence of this chain
  to more-reliably determine whether the system is using iptables-legacy or