You are looking at documentation for an alpha release.
Kubernetes fieldsedit
This functionality is in beta and is subject to change. The design and code is less mature than official GA features and is being provided as-is with no warranties. Beta features are not subject to the support SLA of official GA features.
Kubernetes metadata added by the kubernetes processor
kubernetes.pod.nameedit
type: keyword
Kubernetes pod name
kubernetes.namespaceedit
type: keyword
Kubernetes namespace
kubernetes.labelsedit
type: object
Kubernetes labels map
kubernetes.annotationsedit
type: object
Kubernetes annotations map
kubernetes.container.nameedit
type: keyword
Kubernetes container name
kubernetes.container.imageedit
type: keyword
Kubernetes container image