- The CSI driver-registrar external sidecar container v1.0.0-rc2 is known to take up to 1 minute to start in some cases. We expect this issue to be resolved in a future release of the sidecar container. For verification, please see the release notes of future releases of the external sidecar container. ([#76](https://github.com/kubernetes-csi/driver-registrar/issues/76))

- Sidecar termination is now serialized and each sidecar container will receive a `SIGTERM` after all main containers and later starting sidecar containers have terminated. ([#120620](https://github.com/kubernetes/kubernetes/pull/120620), [@tzneal](https://github.com/tzneal))

        iter.remove();
      }
    }
    assertIntact(q);
    assertThat(result).containsExactly(1, 15, 13, 8, 14);
  }

  /**
   * This tests a special case of the removeAt() call. Moving an element sideways on the heap could
   * break the invariants. Sometimes we need to bubble an element up instead of trickling down. See
   * implementation.
   */
  public void testInvalidatingRemove() {

    public static final String LABELS_menu_related_query = "{labels.menu_related_query}";

    /** The key of the message: Search... */
    public static final String LABELS_SIDEBAR_placeholder_search = "{labels.sidebar.placeholder_search}";

    /** The key of the message: Plugin */
    public static final String LABELS_menu_plugin = "{labels.menu_plugin}";

    /** The key of the message: Storage */

- kubeadm: remove misleading error message regarding image pulling ([#66658](https://github.com/kubernetes/kubernetes/pull/66658), [@dixudx](https://github.com/dixudx))
- kubeadm: Pull sidecar and dnsmasq-nanny images when using kube-dns ([#66499](https://github.com/kubernetes/kubernetes/pull/66499), [@rosti](https://github.com/rosti))

- The new feature gate "SidecarContainers" is now available. This feature introduces sidecar containers, a new type of init container that starts before other containers but remains running for the full duration of the pod's lifecycle and will not block pod termination. ([#116429](https://github.com/kubernetes/kubernetes/pull/116429), [@...

08E4..08FE    ; valid                                  # 6.1  ARABIC CURLY FATHA..ARABIC DAMMA WITH DOT
08FF          ; valid                                  # 7.0  ARABIC MARK SIDEWAYS NOON GHUNNA
0900          ; valid                                  # 5.2  DEVANAGARI SIGN INVERTED CANDRABINDU
0901..0903    ; valid                                  # 1.1  DEVANAGARI SIGN CANDRABINDU..DEVANAGARI SIGN VISARGA

- Fixed a startup probe race condition that caused main containers to remain stuck in "Initializing" state when sidecar containers with startup probes failed initially but succeeded on restart in pods with restartPolicy=Never. ([#134800](https://github.com/kubernetes/kubernetes/pull/134800), [@yuanwang04](https://github.com/yuanwang04)) [SIG Node and Testing]

- Revised node selection based on container image location. The kube-scheduler now considers whether nodes have the required images available for init containers, and for sidecar containers if the cluster has 'SidecarContainers' enabled. ([#123366](https://github.com/kubernetes/kubernetes/pull/123366), [@kerthcet](https://github.com/kerthcet))

* Reduced the CPU and memory requests for the Metrics Server Nanny sidecar container to free up unused resources.  ([#57252](https://github.com/kubernetes/kubernetes/pull/57252), [@kawych](https://github.com/kawych))