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Add out_kafka daemonset #11
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732d848
Copies output/elasticsearch/
solsson ecd371b
Configures current dev build of out_kafka,
solsson 9b62cea
Bumps to latest build, tag 0.2
solsson 1403cc9
Upgrades to :0.3 but keeps unencoded format
solsson b988dd0
New build from https://github.com/fluent/fluent-bit/issues/94
solsson e045ef1
Elaborates on a naming convention
solsson 15d82a5
Uses the bootstrap service, to avoid error messages in smaller clusters
solsson 8765262
Recommends that we retry sending, forever - TODO: memory limits
solsson 7945b66
Upgrades to latest fluent-bit-kafka-dev image, librdkafka 0.11.3
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| apiVersion: v1 | ||
| kind: ConfigMap | ||
| metadata: | ||
| name: fluent-bit-config | ||
| namespace: logging | ||
| labels: | ||
| k8s-app: fluent-bit | ||
| data: | ||
| # Configuration files: server, input, filters and output | ||
| # ====================================================== | ||
| fluent-bit.conf: | | ||
| [SERVICE] | ||
| Flush 1 | ||
| Log_Level info | ||
| Daemon off | ||
| Parsers_File parsers.conf | ||
|
|
||
| @INCLUDE input-kubernetes.conf | ||
| @INCLUDE filter-kubernetes.conf | ||
| @INCLUDE output-kafka.conf | ||
|
|
||
| input-kubernetes.conf: | | ||
| [INPUT] | ||
| Name tail | ||
| Tag kube.* | ||
| Path /var/log/containers/*.log | ||
| Parser docker | ||
| DB /var/log/flb_kube.db | ||
| Mem_Buf_Limit 5MB | ||
| Skip_Long_Lines On | ||
| Refresh_Interval 10 | ||
|
|
||
| filter-kubernetes.conf: | | ||
| [FILTER] | ||
| Name kubernetes | ||
| Match kube.* | ||
| Kube_URL https://kubernetes.default.svc:443 | ||
| Merge_JSON_Log On | ||
|
|
||
| output-kafka.conf: | | ||
| [OUTPUT] | ||
| Name kafka | ||
| Match * | ||
| Brokers bootstrap.kafka:9092 | ||
| Topics ops.kube-logs-fluentbit.stream.json.001 | ||
| Timestamp_Key @timestamp | ||
| Retry_Limit false | ||
|
|
||
| parsers.conf: | | ||
| [PARSER] | ||
| Name apache | ||
| Format regex | ||
| Regex ^(?<host>[^ ]*) [^ ]* (?<user>[^ ]*) \[(?<time>[^\]]*)\] "(?<method>\S+)(?: +(?<path>[^\"]*?)(?: +\S*)?)?" (?<code>[^ ]*) (?<size>[^ ]*)(?: "(?<referer>[^\"]*)" "(?<agent>[^\"]*)")?$ | ||
| Time_Key time | ||
| Time_Format %d/%b/%Y:%H:%M:%S %z | ||
|
|
||
| [PARSER] | ||
| Name apache2 | ||
| Format regex | ||
| Regex ^(?<host>[^ ]*) [^ ]* (?<user>[^ ]*) \[(?<time>[^\]]*)\] "(?<method>\S+)(?: +(?<path>[^ ]*) +\S*)?" (?<code>[^ ]*) (?<size>[^ ]*)(?: "(?<referer>[^\"]*)" "(?<agent>[^\"]*)")?$ | ||
| Time_Key time | ||
| Time_Format %d/%b/%Y:%H:%M:%S %z | ||
|
|
||
| [PARSER] | ||
| Name apache_error | ||
| Format regex | ||
| Regex ^\[[^ ]* (?<time>[^\]]*)\] \[(?<level>[^\]]*)\](?: \[pid (?<pid>[^\]]*)\])?( \[client (?<client>[^\]]*)\])? (?<message>.*)$ | ||
|
|
||
| [PARSER] | ||
| Name nginx | ||
| Format regex | ||
| Regex ^(?<remote>[^ ]*) (?<host>[^ ]*) (?<user>[^ ]*) \[(?<time>[^\]]*)\] "(?<method>\S+)(?: +(?<path>[^\"]*?)(?: +\S*)?)?" (?<code>[^ ]*) (?<size>[^ ]*)(?: "(?<referer>[^\"]*)" "(?<agent>[^\"]*)")?$ | ||
| Time_Key time | ||
| Time_Format %d/%b/%Y:%H:%M:%S %z | ||
|
|
||
| [PARSER] | ||
| Name json-test | ||
| Format json | ||
| Time_Key time | ||
| Time_Format %d/%b/%Y:%H:%M:%S %z | ||
|
|
||
| [PARSER] | ||
| Name docker | ||
| Format json | ||
| Time_Key time | ||
| Time_Format %Y-%m-%dT%H:%M:%S.%L | ||
| Time_Keep On | ||
|
|
||
| [PARSER] | ||
| Name syslog | ||
| Format regex | ||
| Regex ^\<(?<pri>[0-9]+)\>(?<time>[^ ]* {1,2}[^ ]* [^ ]*) (?<host>[^ ]*) (?<ident>[a-zA-Z0-9_\/\.\-]*)(?:\[(?<pid>[0-9]+)\])?(?:[^\:]*\:)? *(?<message>.*)$ | ||
| Time_Key time | ||
| Time_Format %b %d %H:%M:%S | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| apiVersion: extensions/v1beta1 | ||
| kind: DaemonSet | ||
| metadata: | ||
| name: fluent-bit | ||
| namespace: logging | ||
| labels: | ||
| k8s-app: fluent-bit-logging | ||
| version: v1 | ||
| kubernetes.io/cluster-service: "true" | ||
| spec: | ||
| template: | ||
| metadata: | ||
| labels: | ||
| k8s-app: fluent-bit-logging | ||
| version: v1 | ||
| kubernetes.io/cluster-service: "true" | ||
| spec: | ||
| containers: | ||
| - name: fluent-bit | ||
| image: fluent/fluent-bit-kafka-dev:0.5@sha256:8f651e4e03239bcd758bffdcc7d16eba38d5e96876757e6ccff29b4eff2e3241 | ||
| volumeMounts: | ||
| - name: varlog | ||
| mountPath: /var/log | ||
| - name: varlibdockercontainers | ||
| mountPath: /var/lib/docker/containers | ||
| readOnly: true | ||
| - name: fluent-bit-config | ||
| mountPath: /fluent-bit/etc/ | ||
| - name: mnt | ||
| mountPath: /mnt | ||
| readOnly: true | ||
| terminationGracePeriodSeconds: 10 | ||
| volumes: | ||
| - name: varlog | ||
| hostPath: | ||
| path: /var/log | ||
| - name: varlibdockercontainers | ||
| hostPath: | ||
| path: /var/lib/docker/containers | ||
| - name: fluent-bit-config | ||
| configMap: | ||
| name: fluent-bit-config | ||
| - name: mnt | ||
| hostPath: | ||
| path: /mnt | ||
| serviceAccountName: fluent-bit | ||
| tolerations: | ||
| - key: node-role.kubernetes.io/master | ||
| operator: Exists | ||
| effect: NoSchedule |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| apiVersion: extensions/v1beta1 | ||
| kind: DaemonSet | ||
| metadata: | ||
| name: fluent-bit | ||
| namespace: logging | ||
| labels: | ||
| k8s-app: fluent-bit-logging | ||
| version: v1 | ||
| kubernetes.io/cluster-service: "true" | ||
| spec: | ||
| template: | ||
| metadata: | ||
| labels: | ||
| k8s-app: fluent-bit-logging | ||
| version: v1 | ||
| kubernetes.io/cluster-service: "true" | ||
| spec: | ||
| containers: | ||
| - name: fluent-bit | ||
| image: fluent/fluent-bit-kafka-dev:0.5@sha256:8f651e4e03239bcd758bffdcc7d16eba38d5e96876757e6ccff29b4eff2e3241 | ||
| volumeMounts: | ||
| - name: varlog | ||
| mountPath: /var/log | ||
| - name: varlibdockercontainers | ||
| mountPath: /var/lib/docker/containers | ||
| readOnly: true | ||
| - name: fluent-bit-config | ||
| mountPath: /fluent-bit/etc/ | ||
| terminationGracePeriodSeconds: 10 | ||
| volumes: | ||
| - name: varlog | ||
| hostPath: | ||
| path: /var/log | ||
| - name: varlibdockercontainers | ||
| hostPath: | ||
| path: /var/lib/docker/containers | ||
| - name: fluent-bit-config | ||
| configMap: | ||
| name: fluent-bit-config | ||
| serviceAccountName: fluent-bit | ||
| tolerations: | ||
| - key: node-role.kubernetes.io/master | ||
| operator: Exists | ||
| effect: NoSchedule |
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What are your thoughts?
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I was unaware of this but now I found fluent/fluent-bit#309 (comment). I guess the daemonset pods need some monitoring, like a gauge for the number of messages in buffer.
If one message fails it's quite unlikely that the next will be sent, so I think
Retry_Limit=Falsemakes sense to preserve ordering, in combination with a very narrow memory limit. It's a decent alternative to buffer monitoring, because if the pod hits the memory limit it will be replaced and generic monitoring on readiness (for example using prometheus-operator and this example) will alert about the issue.