String CRAWLER_SYSTEM_MONITOR_INTERVAL = "crawler.system.monitor.interval";

    /** The key of the configuration. e.g. true */
    String CRAWLER_HOTTHREAD_ignore_idle_threads = "crawler.hotthread.ignore_idle_threads";

    /** The key of the configuration. e.g. 500ms */
    String CRAWLER_HOTTHREAD_INTERVAL = "crawler.hotthread.interval";

    /** The key of the configuration. e.g. 10 */

  // kubelet.  If the kubelet is configured to verify the apiserver's TLS credentials, it does not mean the
  // connection to the real kubelet is vulnerable to a man in the middle attack (e.g. an attacker could not intercept
  // the actual log data coming from the real kubelet).
  // +optional
  optional bool insecureSkipTLSVerifyBackend = 9;
}

* Remove Initializers from admission-control in kubernetes-master charm for pre-1.7 ([#46987](https://github.com/kubernetes/kubernetes/pull/46987), [@Cynerva](https://github.com/Cynerva))
* Added state guards to the idle_status messaging in the kubernetes-master charm to make deployment faster on initial deployment. ([#47183](https://github.com/kubernetes/kubernetes/pull/47183), [@chuckbutler](https://github.com/chuckbutler))