You are looking at documentation for an alpha release.
Docker 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.
Docker stats collected from Docker.
docker.container.idedit
type: keyword
Unique container id.
docker.container.imageedit
type: keyword
Name of the image the container was built on.
docker.container.nameedit
type: keyword
Container name.
docker.container.labelsedit
type: object
Image labels.