I'm testing Fluent-bit for my local cluster which has a CRI runtime interface and I'm sending logs to a slack channel. But the problem is that Fluent-Bit is assigning a "timestamp" in the log and I'm not able to remove it. Maybe someone knows a solution?

Here is the ConfigMap of my Fluent-Bit:

apiVersion: v1
kind: ConfigMap
  name: fluent-bit-config
  namespace: logging1
    k8s-app: fluent-bit
  # Configuration files: server, input, filters and output
  # ======================================================
  fluent-bit.conf: |
        Flush         2
        Log_Level     info
        Daemon        off
        Parsers_File  parsers.conf
        HTTP_Server   On
        HTTP_Port     2020
    @INCLUDE input-kubernetes.conf
    @INCLUDE filter-kubernetes.conf
    @INCLUDE output-syslog.conf
  input-kubernetes.conf: |
        Name              tail
        Tag               kube.*
        Path              /var/log/containers/*
        Parser            cri
        DB                /var/log/flb_kube.db
        Mem_Buf_Limit     5MB
        Skip_Long_Lines   On

  filter-kubernetes.conf: |

  output-syslog.conf: |
        Name               slack
        Match              *
        webhook            [LINK]
  parsers.conf: |
        Name          cc
        Format        regex
        Format        cri
        Regex         ^(?<time>[^ ]+) (?<stream>stdout|stderr) (?<logtag>[^ ]*) (?<message>.*)$
        Time_Key      time
        Time_Format   %Y-%m-%dT%H:%M:%S.%L%z

Also here is the raw log coming from my app:

2023-04-12T16:09:02.016483996Z stderr F - - [12/Apr/2023 16:09:02] "GET / HTTP/1.1" 200 -

And this is the log that is sent to Slack:

["timestamp": 1681315742.016981904, {"log"=>"2023-04-12T16:09:02.016483996Z stderr F - - [12/Apr/2023 16:09:02] "GET / HTTP/1.1" 200 -"}]

1 Answer 1


You may be able to use the record_transformer filter to remove the timestamp key with remove_keys

<filter foo.bar>
  @type record_transformer
  remove_keys timestamp

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