Elasticsearch index name based on kubernetes.pod_namespace value

[andy812]

I use kubernetes_logs source elasticsearch sink and can't find the way how to generate index name based on kubernetes.pod_namespace value. For examle:

  sources:
    monitoring_grafana:
      type: kubernetes_logs
      extra_label_selector: "app.kubernetes.io/instance=prom,app.kubernetes.io/name=grafana"
  sinks:
    es:
      type: elasticsearch
      inputs:
        - monitoring_grafana
      bulk:
        index: "vector-{{kubernetes.pod_namespace}}-%Y-%m-%d"

What should i use instead of {{kubernetes.pod_namespace}}? Please, add an example in documentation.

[andy812]

It doesn't look good, but it works:

[jszwedko]

Ah, yeah, I'm guessing you needed to escape the {{}}`` because you are using a configuration language to generate Vector's config that also uses {{ }}`?

[wtchangdm]

I think so.

{{ ... }} are also used by Helm Chart (Go Template to be precise).
We use this trick to escape as well.

[andy812]

Yes, it's a part of my values.yaml

[spencergilbert]

An alternative (still not pretty) solution can be seen here: https://github.com/vectordotdev/helm-charts/blob/develop/charts/vector/README.md#using-template-syntax-in-customconfig