v1.5.3

• Upgrade fluent-plugin-google-cloud to 0.4.7 from 0.4.5:
  • Add a config option detect_subservice.
    • If set to false it disables detection of "subservices" like Managed VM, Dataflow, Kubernetes, etc. and just uses the GCE service name and labels.
    • The default is true, which causes no change to the current behavior.
  • Kubernetes/GKE label support:
    • Add support for better labels on Kubernetes and Container Engine logs.
    • Add support for attaching container metadata based on the tag.
  • Include GCE labels also on dataflow.
  • mark 'private_key_passphrase' as 'secret' so it doesn't show up in the fluent log.