FluentbitAgent: configuring filterKubernete.K8S-Logging.Parser should enable inputTail.multiline.parser

[baby-gnu]

Is your feature request related to a problem? Please describe.

It took times to have a working setup with kubernetes pod annotation.

Describe the solution you'd like

When filterKubernete.K8S-Logging.Parser is enabled, the inputTail.multiline.parser is automatically enabled too.

Describe alternatives you've considered

Add a note in documentation explicitly describing the mandatory dependency.

Additional context

I initially opened an issue is fluent-bit and finally found the solution: I had to manually configure inputTail.multiline.parser

Thanks.

[pepov]

@baby-gnu thanks for the report! Can you add your working configuration snippet here as the example we should provide?

[baby-gnu]

Hello

Here is my working configuration:

• inputTail.multiline.parser: make filterKubernetes.K8S-Logging.Parser: "On" really works
• Merge_Log_Key: "parsed": is optional but adding keys at top level is risky because it can result in conflicting keys (for example the host from k8s-nginx-ingress conflicting with the kubernetes host)

---
apiVersion: logging.banzaicloud.io/v1beta1
kind: FluentbitAgent
metadata:
  name: example-fluentbit
spec:
  metrics:
    serviceMonitor: true
  inputTail:
    multiline.parser: [cri]
  filterKubernetes:
    K8S-Logging.Parser: "On"
    Merge_Log_Key: "parsed"
...