K
Q

Question

Helm select specific field from map

4/9/2021

I have a values.yaml that looks like this, and I want to select the first url

ingress:
  hosts:
    - host: url
      paths:
        - /
    - host: url2
      paths:
        - /

Here is what I have currently tried:

But I'm getting error: can't evaluate field host in type interface {}

Could anyone help me format the selection properly to just select the first url?

-- Callum

kubernetes

kubernetes-helm

4/9/2021

.Values.ingress.hosts is a list, so you have to select the first item from that, and then you can select the host out of it:

{{ (first .Values.ingress.hosts).host }}

You could also use the Go text/template index function to do the traversal (where index 0 is "the first item")

{{ index .Values.ingress.hosts 0 "host" }}

-- David Maze

Source: StackOverflow