OptionalconfigSelects a key of a ConfigMap.
OptionalfieldSelects a field of the pod: supports metadata.name, metadata.namespace, metadata.labels['<KEY>'], metadata.annotations['<KEY>'], spec.nodeName, spec.serviceAccountName, status.hostIP, status.podIP, status.podIPs.
OptionalresourceSelects a resource of the container: only resources limits and requests (limits.cpu, limits.memory, limits.ephemeral-storage, requests.cpu, requests.memory and requests.ephemeral-storage) are currently supported.
OptionalsecretSelects a key of a secret in the pod's namespace
EnvVarSource represents a source for the value of an EnvVar.