ES では一部のログが欠落していることが時々わかりますが、Kubernetes では確認できます。
私が見つけたログの問題だけは、流暢なビットのログで次のような kubernetes パーサーの問題を指摘しています。
[2020/11/22 09:53:18] [debug] [filter:kubernetes:kubernetes.1] could not merge JSON log as requested
「Merge_Log」オプションを「オフ」に設定して kubernetes フィルターを構成すると、問題が解決したように見えます (少なくとも fluent-bit ログの「警告/エラー」はなくなります)。しかし、もちろん、「メッセージ」自体以外のフィールド/値を実際に持つなどの大きな機能を失います。
これ以外に、fluent-bit または elasticsearch のいずれにもエラー/警告メッセージはありません。それが私の主な容疑者です。ログ (info の log_level) には以下が含まれます。
k --context contexto09 -n logging-system logs -f -l app=fluent-bit --max-log-requests 31 | grep -iv "\[ info\]"
[2020/11/22 19:45:02] [ warn] [engine] failed to flush chunk '1-1606074289.692844263.flb', retry in 25 seconds: task_id=31, input=appstream > output=es.0
[2020/11/22 19:45:02] [ warn] [engine] failed to flush chunk '1-1606074208.938295842.flb', retry in 25 seconds: task_id=67, input=appstream > output=es.0
[2020/11/22 19:45:08] [ warn] [engine] failed to flush chunk '1-1606074298.662911160.flb', retry in 10 seconds: task_id=76, input=appstream > output=es.0
[2020/11/22 19:45:13] [ warn] [engine] failed to flush chunk '1-1606074310.619565119.flb', retry in 9 seconds: task_id=77, input=appstream > output=es.0
[2020/11/22 19:45:13] [ warn] [engine] failed to flush chunk '1-1606073869.655178524.flb', retry in 1164 seconds: task_id=33, input=appstream > output=es.0
[2020/11/22 19:45:18] [ warn] [engine] failed to flush chunk '1-1606074298.662911160.flb', retry in 282 seconds: task_id=76, input=appstream > output=es.0
[2020/11/22 19:45:21] [ warn] [engine] failed to flush chunk '1-1606073620.626120246.flb', retry in 1974 seconds: task_id=8, input=appstream > output=es.0
[2020/11/22 19:45:21] [ warn] [engine] failed to flush chunk '1-1606074050.441691966.flb', retry in 1191 seconds: task_id=51, input=appstream > output=es.0
[2020/11/22 19:45:22] [ warn] [engine] failed to flush chunk '1-1606074310.619565119.flb', retry in 79 seconds: task_id=77, input=appstream > output=es.0
[2020/11/22 19:45:22] [ warn] [engine] failed to flush chunk '1-1606074319.600878876.flb', retry in 6 seconds: task_id=78, input=appstream > output=es.0
[2020/11/22 19:45:09] [ warn] [engine] failed to flush chunk '1-1606073576.849876665.flb', retry in 1091 seconds: task_id=4, input=appstream > output=es.0
[2020/11/22 19:45:12] [ warn] [engine] failed to flush chunk '1-1606074292.958592278.flb', retry in 898 seconds: task_id=141, input=appstream > output=es.0
[2020/11/22 19:45:14] [ warn] [engine] failed to flush chunk '1-1606074302.347198351.flb', retry in 32 seconds: task_id=143, input=appstream > output=es.0
[2020/11/22 19:45:14] [ warn] [engine] failed to flush chunk '1-1606074253.953778140.flb', retry in 933 seconds: task_id=133, input=appstream > output=es.0
[2020/11/22 19:45:16] [ warn] [engine] failed to flush chunk '1-1606074313.923004098.flb', retry in 6 seconds: task_id=144, input=appstream > output=es.0
[2020/11/22 19:45:18] [ warn] [engine] failed to flush chunk '1-1606074022.933436366.flb', retry in 73 seconds: task_id=89, input=appstream > output=es.0
[2020/11/22 19:45:18] [ warn] [engine] failed to flush chunk '1-1606074304.968844730.flb', retry in 82 seconds: task_id=145, input=appstream > output=es.0
[2020/11/22 19:45:19] [ warn] [engine] failed to flush chunk '1-1606074316.958207701.flb', retry in 10 seconds: task_id=146, input=appstream > output=es.0
[2020/11/22 19:45:19] [ warn] [engine] failed to flush chunk '1-1606074283.907428020.flb', retry in 207 seconds: task_id=139, input=appstream > output=es.0
[2020/11/22 19:45:22] [ warn] [engine] failed to flush chunk '1-1606074313.923004098.flb', retry in 49 seconds: task_id=144, input=appstream > output=es.0
[2020/11/22 19:45:24] [ warn] [engine] failed to flush chunk '1-1606074232.931522416.flb', retry in 109 seconds: task_id=129, input=appstream > output=es.0
...
...
[2020/11/22 19:46:31] [ warn] [engine] chunk '1-1606074022.933436366.flb' cannot be retried: task_id=89, input=appstream > output=es.0
log_level の「デバッグ」を有効にする1. [2020/11/22 09:53:18] [debug] [filter:kubernetes:kubernetes.1] could not merge JSON log as requestedと、すべての「merge_log」がオフのときにチャンク エラーをフラッシュするためのフィアルがないため、チャンクがフラッシュに失敗する理由であると思われるこれらが表示されます。
私の現在の流暢なビット設定は次のようなものです：
kind: ConfigMap
metadata:
labels:
app: fluent-bit
app.kubernetes.io/instance: cluster-logging
chart: fluent-bit-2.8.6
heritage: Tiller
release: cluster-logging
name: config
namespace: logging-system
apiVersion: v1
data:
fluent-bit-input.conf: |
[INPUT]
Name tail
Path /var/log/containers/*.log
Exclude_Path /var/log/containers/cluster-logging-*.log,/var/log/containers/elasticsearch-data-*.log,/var/log/containers/kube-apiserver-*.log
Parser docker
Tag kube.*
Refresh_Interval 5
Mem_Buf_Limit 15MB
Skip_Long_Lines On
Ignore_Older 7d
DB /tail-db/tail-containers-state.db
DB.Sync Normal
[INPUT]
Name systemd
Path /var/log/journal/
Tag host.*
Max_Entries 1000
Read_From_Tail true
Strip_Underscores true
[INPUT]
Name tail
Path /var/log/containers/kube-apiserver-*.log
Parser docker
Tag kube-apiserver.*
Refresh_Interval 5
Mem_Buf_Limit 5MB
Skip_Long_Lines On
Ignore_Older 7d
DB /tail-db/tail-kube-apiserver-containers-state.db
DB.Sync Normal
fluent-bit-filter.conf: |
[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
K8S-Logging.Parser On
K8S-Logging.Exclude On
Merge_Log On
Keep_Log Off
Annotations Off
[FILTER]
Name kubernetes
Match kube-apiserver.*
Kube_Tag_Prefix kube-apiserver.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
K8S-Logging.Parser Off
K8S-Logging.Exclude Off
Merge_Log Off
Keep_Log On
Annotations Off
fluent-bit-output.conf: |
[OUTPUT]
Name es
Match logs
Host elasticsearch-data
Port 9200
Logstash_Format On
Retry_Limit 5
Type flb_type
Time_Key @timestamp
Replace_Dots On
Logstash_Prefix logs
Logstash_Prefix_Key index
Generate_ID On
Buffer_Size 2MB
Trace_Output Off
[OUTPUT]
Name es
Match sys
Host elasticsearch-data
Port 9200
Logstash_Format On
Retry_Limit 5
Type flb_type
Time_Key @timestamp
Replace_Dots On
Logstash_Prefix sys-logs
Generate_ID On
Buffer_Size 2MB
Trace_Output Off
[OUTPUT]
Name es
Match host.*
Host elasticsearch-data
Port 9200
Logstash_Format On
Retry_Limit 10
Type flb_type
Time_Key @timestamp
Replace_Dots On
Logstash_Prefix host-logs
Generate_ID On
Buffer_Size 2MB
Trace_Output Off
[OUTPUT]
Name es
Match kube-apiserver.*
Host elasticsearch-data
Port 9200
Logstash_Format On
Retry_Limit 10
Type _doc
Time_Key @timestamp
Replace_Dots On
Logstash_Prefix kube-apiserver
Generate_ID On
Buffer_Size 2MB
Trace_Output Off
fluent-bit-stream-processor.conf: |
[STREAM_TASK]
Name appstream
Exec CREATE STREAM appstream WITH (tag='logs') AS SELECT * from TAG:'kube.*' WHERE NOT (kubernetes['namespace_name']='ambassador-system' OR kubernetes['namespace_name']='argocd' OR kubernetes['namespace_name']='istio-system' OR kubernetes['namespace_name']='kube-system' OR kubernetes['namespace_name']='logging-system' OR kubernetes['namespace_name']='monitoring-system' OR kubernetes['namespace_name']='storage-system') ;
[STREAM_TASK]
Name sysstream
Exec CREATE STREAM sysstream WITH (tag='sys') AS SELECT * from TAG:'kube.*' WHERE (kubernetes['namespace_name']='ambassador-system' OR kubernetes['namespace_name']='argocd' OR kubernetes['namespace_name']='istio-system' OR kubernetes['namespace_name']='kube-system' OR kubernetes['namespace_name']='logging-system' OR kubernetes['namespace_name']='monitoring-system' OR kubernetes['namespace_name']='storage-system') ;
fluent-bit-service.conf: |
[SERVICE]
Flush 3
Daemon Off
Log_Level info
Parsers_File parsers.conf
Streams_File /fluent-bit/etc/fluent-bit-stream-processor.conf
fluent-bit.conf: |
@INCLUDE fluent-bit-service.conf
@INCLUDE fluent-bit-input.conf
@INCLUDE fluent-bit-filter.conf
@INCLUDE fluent-bit-output.conf
parsers.conf: |
[PARSER]
Name docker
Format json
Time_Key time
Time_Format %Y-%m-%dT%H:%M:%S.%L
Time_Keep On
Merge_Log は「kube-apiserver. 」に対してオフであり、これまでのところ正常に動作していますが、最終的な動作は望ましくありません (フィールド マッピングは行われていません)。「kube.」の Merge_Log がオンになっており、期待どおりに ES でフィールドを生成しています...しかし、ログが失われています。
このエラーにつながる kubernetes パーサーで関連するコードを見つけましたが、このメッセージにつながるエラーを「修正」する方法を理解する知識が不足していますhttps://github.com/fluent/fluent-bit/blob/master /plugins/filter_kubernetes/kubernetes.c#L162
これは本当にイライラし始めており、なぜこれが起こるのか、またはそれを修正する方法がわかりません. 何か助けてください。