* If you are using plugins other than `bridge`, make sure you have
        updated custom plugins to the latest version that is compatible.
* **CNI plugins now affect node readiness**
  * Kubelet will now block node readiness until a CNI configuration file is
    present in `/etc/cni/net.d` or a given custom CNI configuration path.
    [This change](https://github.com/kubernetes/kubernetes/pull/43474) ensures

	// Default node tolerations to be applied to all deployments so that all pods can be
	// scheduled to nodes with matching taints. Each component can overwrite
	// these default values by adding its tolerations block in the relevant section below
	// and setting the desired values.
	// Configure this field in case that all pods of Istio control plane are expected to
	// be scheduled to particular nodes with specified taints.
	//