Runtime
Patch resources are used to modify existing Kubernetes resources by using Server-Side Apply updates. The name of the resource must be specified, but all other properties are optional. More than one patch may be applied to the same resource, and a random FieldManager name will be used for each Patch resource. Conflicts will result in an error by default, but can be forced using the "pulumi.com/patchForce" annotation. See the Server-Side Apply Docs for additional information about using Server-Side Apply to manage Kubernetes resources with Pulumi. RuntimeClass defines a class of container runtime supported in the cluster. The RuntimeClass is used to determine which container runtime is used to run all containers in a pod. RuntimeClasses are (currently) manually defined by a user or cluster provisioner, and referenced in the PodSpec. The Kubelet is responsible for resolving the RuntimeClassName reference before running the pod. For more details, see https://git.k8s.io/enhancements/keps/sig-node/runtime-class.md
Properties
Handler specifies the underlying runtime and configuration that the CRI implementation will use to handle pods of this class. The possible values are specific to the node & CRI configuration. It is assumed that all handlers are available on every node, and handlers of the same name are equivalent on every node. For example, a handler called "runc" might specify that the runc OCI runtime (using native Linux containers) will be used to run the containers in a pod. The Handler must conform to the DNS Label (RFC 1123) requirements, and is immutable.
Overhead represents the resource overhead associated with running a pod for a given RuntimeClass. For more details, see https://git.k8s.io/enhancements/keps/sig-node/20190226-pod-overhead.md This field is alpha-level as of Kubernetes v1.15, and is only honored by servers that enable the PodOverhead feature.