Special character with yamlencode with helm values

[klemen-df]

Terraform, Provider, Kubernetes and Helm Versions

Terraform version: 1.1.9
Provider version: 2.5.1
Kubernetes version: aks v1.22.6

Affected Resource(s)

• helm_release

Terraform Configuration Files

    set {
      name = "config"
      value = yamlencode({
        modules = {
          http_2xx = {
            prober  = "http"
            timeout = "5s"
            http = {
              valid_http_versions   = ["HTTP/2.0"]
              follow_redirects      = false
              preferred_ip_protocol = "ip4"
              method                = "HEAD"
              fail_if_not_ssl       = true
              enable_http2          = true
            }
          }
        }
      })
    }

Debug Output

      + set {
          + name  = "config"
          + value = <<-EOT
                "modules":
                  "http_2xx":
                    "http":
                      "enable_http2": true
                      "fail_if_not_ssl": true
                      "follow_redirects": false
                      "method": "HEAD"
                      "preferred_ip_protocol": "ip4"
                      "valid_http_versions":
                      - "HTTP/2.0"
                    "prober": "http"
                    "timeout": "5s"
            EOT
        }

Steps to Reproduce

1. terraform apply

Expected Behavior

"modules":
  "http_2xx":
    "http":
      "enable_http2": true
      "fail_if_not_ssl": true
      "follow_redirects": false
      "method": "HEAD"
      "preferred_ip_protocol": "ip4"
      "valid_http_versions":
      - "HTTP/2.0"
    "prober": "http"
    "timeout": "5s"

Actual Behavior

|
  "modules":
    "http_2xx":
      "http":
        "enable_http2": true
        "fail_if_not_ssl": true
        "follow_redirects": false
        "method": "HEAD"
        "preferred_ip_protocol": "ip4"
        "valid_http_versions":
        - "HTTP/2.0"
      "prober": "http"
      "timeout": "5s"

[jrhouston]

Hi @KlemenDanfoss – I'm not sure if I understand your issue. Is the special character you are referring to the pipe | at the start of your second snippet? This character is used in YAML for multi-line strings. By using yamlencode you are creating a string value that contains YAML rather than specifying YAML directly, so that might be why you are seeing it appear with the | character once it's rendered.

[klemen-df]

Hi, yes, I'm talking about the pipe at the start of my second snippet.

So, basically, yamlencode is not the right way to go to define a 'multiline variable'?

[jrhouston]

@KlemenDanfoss yeah, you might want to try using the values attribute instead, which accepts arbitrary YAML like this:

values = [
  yamlencode({ 
    config = {
      modules = {
        http_2xx = {
          prober  = "http"
          timeout = "5s"
          http = {
            valid_http_versions   = ["HTTP/2.0"]
            follow_redirects      = false
            preferred_ip_protocol = "ip4"
            method                = "HEAD"
            fail_if_not_ssl       = true
            enable_http2          = true
          }
        }
      }
    }
  })
]

[klemen-df]

Hi,

thanks for the reply. I understand, I also found this.

If this doesn't 'work' then maybe we could add this to documentation (somehow) so other people don't get confused as well.

[nichoio]

I'm facing a related issue. I'm trying to parameterize a value in a chart which uses Helm provider.

Excerpt from my code:

  helm_config = {
    chart = ...
    values = [
      yamlencode({
        spawnerUiConfig = {
          spawnerFormDefaults = {
            image = {
              ...
            }
          }
        }
      })
    ]
  }

I'm trying to render the value like this:

apiVersion: v1
kind: ConfigMap
data:
  spawner_ui_config.yaml: |
    {{ .Values.spawnerUiConfig }}

But this is what is applied:

data:
  spawner_ui_config.yaml: |
    map[spawnerFormDefaults:map[image:map[

Desired output would be this:

data:
  spawner_ui_config.yaml: |
    spawnerFormDefaults:
      image:

Any ideas how to get rendered this YAML correctly?

[yossigilad]

I'm facing a related issue. I'm trying to parameterize a value in a chart which uses Helm provider.

Excerpt from my code:

  helm_config = {
    chart = ...
    values = [
      yamlencode({
        spawnerUiConfig = {
          spawnerFormDefaults = {
            image = {
              ...
            }
          }
        }
      })
    ]
  }

I'm trying to render the value like this:

apiVersion: v1
kind: ConfigMap
data:
  spawner_ui_config.yaml: |
    {{ .Values.spawnerUiConfig }}

But this is what is applied:

data:
  spawner_ui_config.yaml: |
    map[spawnerFormDefaults:map[image:map[

Desired output would be this:

data:
  spawner_ui_config.yaml: |
    spawnerFormDefaults:
      image:

Any ideas how to get rendered this YAML correctly?

Hi, I'm facing same issue, did you solve it?

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