fluent-bit 按 pod 名生成不同索引

 {"key1": 1234, "kubernetes": {"labels: {"app": "prod"}}}

[OUTPUT]
         name                 es
         match                *
         logstash_format      on
         logstash_prefix_key  $kubernetes['labels']['app']

inputs: |
    [INPUT]
        Name tail
        Path /var/log/containers/*.log
        Parser docker
        Tag kube.*
        Mem_Buf_Limit 5MB
        Skip_Long_Lines On

  ## https://docs.fluentbit.io/manual/pipeline/filters
  filters: |
    [FILTER]
        Name kubernetes
        Match kube.*
        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
        Kube_Tag_Prefix     kube.var.log.containers.

  ## https://docs.fluentbit.io/manual/pipeline/outputs
  outputs: |
    [OUTPUT]
        Name es
        Match kube.*
        Host elasticsearch-master
        Logstash_Format On
        Logstash_Prefix log
        logstash_prefix_key  $kubernetes['labels']['app']
        Retry_Limit False
        # Trace_Error On