encounter panic when turning on AutoKubernetesLabels

[reidlai]

Describe the bug
When turning on AutoKubernetesLabels, fluent-bit log returns panic as follow

Expected behavior
Successfully see all logs in Loki

Environment:

• Infrastructure: minikube v1.6.2
• Deployment tool: kustomize

Screenshots, Promtail config, or terminal output

kubectl logs output

[2020/01/15 08:28:55] [ info] [filter_kube] https=1 host=kubernetes.default.svc port=443
[2020/01/15 08:28:55] [ info] [filter_kube] local POD info OK
[2020/01/15 08:28:55] [ info] [filter_kube] testing connectivity with API server...
[2020/01/15 08:28:55] [ info] [filter_kube] API server connectivity OK
[2020/01/15 08:28:55] [ info] [sp] stream processor started
panic: interface conversion: interface {} is map[string]interface {}, not map[interface {}]interface {}

fluent-bit.conf:

[SERVICE]
    Flush        1
    Daemon       Off
    Log_Level    info
    Parsers_File parsers.conf

[INPUT]
  Name tail
  Path /var/log/containers/*.log
  Parser docker
  Tag kube.*
  Refresh_Interval 5
  Mem_Buf_Limit 5MB
  Skip_Long_Lines On
  DB /run/fluent-bit/flb_kube.db

[INPUT]
  Name systemd
  Tag host.*
  Systemd_Filter _SYSTEMD_UNIT=docker.service
  Systemd_Filter _SYSTEMD_UNIT=kubelet.service
  Systemd_Filter _SYSTEMD_UNIT=node-problem-detector.service
  Max_Entries 1000
  Read_From_Tail true
  Strip_Underscores false

[FILTER]
  Name kubernetes
  Match kube.*
  Kube_Tag_Prefix kube.var.log.containers.
  Kube_URL https://kubernetes.default.svc:443
  Kube_CA_File /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
  Kube_Token_File /var/run/secrets/kubernetes.io/serviceaccount/token
  Merge_Log On
  K8S-Logging.Parser Off

[OUTPUT]
  Name loki
  Match kube.*
  Url http://loki.gohub-gohub.svc:3100/api/prom/push
  # Labels {job="fluent-bit"}
  # RemoveKeys kubernetes,stream
  AutoKubernetesLabels true
  # LabelMapPath /fluent-bit/etc/labelmap.json
  # LineFormat json
  # LogLevel warn

parsers.conf:

[PARSER]
  Name         docker
  Format       json
  Time_Key     time
  Time_Format  %Y-%m-%dT%H:%M:%S.%L

[stale]

This issue has been automatically marked as stale because it has not had any activity in the past 30 days. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.