Automatic Master Selection: How to apply dynamic environment variables?

[matthiasguentert]

Describe the bug
According to the documentation whe should add the following environment variable, so that the master selection happens automatically.

env:
- name: POD_NAME
  valueFrom:
    fieldRef:
      fieldPath: metadata.name

However, the graylog.env value only allows for the following format:

env:
  POD_NAME: "foobar" 

How can we apply the dynamic environment variables?

Version of Helm and Kubernetes:

Helm Version:

$ helm version
version.BuildInfo{Version:"v3.10.3", GitCommit:"835b7334cfe2e5e27870ab3ed4135f136eecc704", GitTreeState:"clean", GoVersion:"go1.18.9"}

Kubernetes Version:

$ kubectl version
WARNING: This version information is deprecated and will be replaced with the output from kubectl version --short.  Use --output=yaml|json to get the full version.
Client Version: version.Info{Major:"1", Minor:"24", GitVersion:"v1.24.0", GitCommit:"4ce5a8954017644c5420bae81d72b09b735c21f0", GitTreeState:"clean", BuildDate:"2022-05-03T13:46:05Z", GoVersion:"go1.18.1", Compiler:"gc", Platform:"linux/amd64"}
Kustomize Version: v4.5.4
Server Version: version.Info{Major:"1", Minor:"25", GitVersion:"v1.25.6", GitCommit:"dc2f9dc64421983f0f7839da8ab4ab6d4673daad", GitTreeState:"clean", BuildDate:"2023-04-08T13:29:19Z", GoVersion:"go1.19.5", Compiler:"gc", Platform:"linux/amd64"}

Which version of the chart:
2.3.2 https://artifacthub.io/packages/helm/kong-z/graylog/2.3.2

[jackgill]

@matthiasguentert this doesn't directly address your question about environmental variables, but if you're primarily concerned with automatic master selection you may find that the solution discussed in #83 resolves the problem (it did for me).