pod name 以字母u开头会缺失

[786951355]

Bug Report

Why is the pod_name prefixed with "uat"? After collection, "u" disappears and only "at-xxxx" remains. Other pods with the prefix "test-" are all normal. However, all the container names are normal.

I didn't perform any operation of rewriting tags.

Screenshots

environment:
fluent bit v4.2.2
k8s: 1.24.6
containerd: 1.6.8

[cosmo0920]

为了进一步定位问题，能否请您提供相关的 Fluent Bit 配置？
特别是以下部分会很有帮助：

• [INPUT]（tail）的 Tag 设置
• [FILTER] kubernetes 中的 Kube_Tag_Prefix
• 是否使用了 Tag_Regex / rewrite_tag / Lua / modify filter

[786951355]

为了进一步定位问题，能否请您提供相关的 Fluent Bit 配置？ 特别是以下部分会很有帮助：

• [INPUT]（tail）的 Tag 设置
• [FILTER] kubernetes 中的 Kube_Tag_Prefix
• 是否使用了 Tag_Regex / rewrite_tag / Lua / modify filter

fluent-bit.conf: |
    [SERVICE]
        Flush        1
        Log_Level    info
        Daemon       off
        Parsers_File parsers.conf

    [INPUT]
        Name              tail
        Path              /var/log/containers/test*.log
        Parser            mycri
        multiline.parser  cri
        Tag               test.*
        Refresh_Interval  10
        Skip_Long_Lines   On
        Mem_Buf_Limit     5MB
 
    [INPUT]
        Name              tail
        Path              /var/log/containers/uat*.log
        Parser            mycri
        multiline.parser  cri
        Tag               uat.*
        Refresh_Interval  10
        Skip_Long_Lines   On
        Mem_Buf_Limit     5MB
 
    [FILTER]
        Name                modify
        Match               test.*
        Add                 log_type test

    [FILTER]
        Name                modify
        Match               uat.*
        Add                 log_type uat

    [FILTER]
        Name                  multiline
        Match                 *
        multiline.key_content log
        multiline.parser      java_custom

    [FILTER]
        Name                kubernetes
        Match               *
        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
        Keep_Log Off
        K8S-Logging.Parser On
        K8S-Logging.Exclude On
        tls.verify          Off
        use_tag_for_meta    On
 
    [OUTPUT]
        Name http
        Match *
        Host test-log.xxxx.com
        Port 9428
        tls off
        tls.verify off
        uri /insert/jsonline?_msg_field=log&_time_field=date&_log_type_field=log_type
        format json_lines
        compress gzip

  parsers.conf: |
    [PARSER]
        Name         mycri
        Format       regex
        Regex        ^(?<time>[^ ]+) (?<stream>stdout|stderr) (?<logtag>[^ ]*) (?<log>.*)$
        Time_Key     time
        Time_Format  %Y-%m-%dT%H:%M:%S.%L
        Time_Keep    Off

    [MULTILINE_PARSER]
        name          java_custom
        type          regex
        flush_timeout 3000
        rule          "start_state" "/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d+/" "cont"
        rule          "cont"        "/^(?!\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2})/"  "cont"