**Problem:** When a Pod fails to run due to kubelet-side admission checks, the
v1.Event objects emitted looks like these:
Reason="NodeAffinity" Message="Predicate NodeAffinity failed"
Reason="NodeName" Message="Predicate NodeName failed"
Reason="NodePorts" Message="Predicate NodePorts failed"
**Solution:** Expose human-readable predicate description in the failure
so that kubelet submits an Event with this description, such as:
Reason="NodeAffinity" Message="Predicate NodeAffinity failed: node(s) didn't match Pod's node affinity/selector"
Reason="NodeName" Message="Predicate NodeName failed: node(s) didn't match the requested node name"
Reason="NodePorts" Message="Predicate NodePorts failed: node(s) didn't have free ports for the requested pod ports"
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