有没有一种方法可以将名称空间包含在值中？

Question

I have got several namespaces (iso, dev, sandbox, etc.) which correspond to my different environments. For each environment and thus namespace, there is an associated db. When I deploy my pod with Helm, I would like to inject the namespace inside a value to get the appropriate password .

In my values file I have something that looks like this :

db:
  iso: passwordISO
  dev: passwordDEV
  sandbox: passwordSANDBOX
  spec: passwordSPEC
  val: passwordVAL

and in my consumer_config file I have this :

  db_host: DB_HOST-{{ .Release.Namespace }}
  db_port: DB_PORT
  db_name: DB_NAME
  db_user: DB_PORT
  db_password: {{ .Values.db.iso }}

I already tried to use the {{- include }} pattern but with no success. I also tried {{ .Values.db.{{ .Release.Namespace }}}} giving me the following error unexpected <.> in operand

Any insight on how to do this or any workaround ?

Answer 1

As Helm is based on the Go-template language, the functions availabe in the go-template language can be of help:

{{ index .Values.db .Release.Namespace }}

From the docs (go-template docs):

index Returns the result of indexing its first argument by the following arguments. Thus "index x 1 2 3" is, in Go syntax, x[1][2][3]. Each indexed item must be a map, slice, or array.

so in this case you index .Values.db with the key .Release.Namespace