Error converting YAML to JSON: yaml: line 15: did not find expected alphabetic or numeric character - Nginx

PhanLyHuynh
February 18, 2022
301 views
3 votes
3 Answers

I want to set wildcard subdomain for my project, using k8s, nginx ingress controller, helm chart:

In ingress.yaml file:

...
rules:
  - host: {{ .Values.ingress.host }}
...

In values.yaml file, I change host example.local to *.example.local:

...
ingress:
  enabled: true
  host: "*.example.local"
...

Then, when I install chart using helm chart:

Error: YAML parse error on example/templates/ingress.yaml: error converting YAML to JSON: yaml: line 15: did not find expected alphabetic or numeric character

How can I fix it?

Thank for your support.

Answers

- RobinWebb
- February 18, 2022 at 10:56 am
- 0 votes
0
In your ingress.yaml put quotes around the host key.
```
host: "{{ .Values.ingress.host }}"
```
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- GirmaMamuye
- February 18, 2022 at 11:47 am
- 0 votes
0
ingress:
enabled: true
host: "*.example.local"

you may need to use "—" instead of

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- anarxz
- February 18, 2022 at 5:19 pm
- 0 votes
0
YAML treats strings starting with asterisk in a special way – that’s why the hostname with wildcards like *.example.local breaks the ingress on helm install.
In order to be recognized as strings, the values in ingress.yaml file should be quoted with " " characters:
```
...
rules:
  - host: "{{ .Values.ingress.host }}"
...
```
One more option here – adding | quote :
```
...
rules:
  - host: {{ .Values.ingress.host | quote }}
...
```
I’ve reproduced your issue, both these options worked correctly. More information on quoting special characters for YAML is here.
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