How to update a default config on the loki-gateway nginx config?

[nscriptdotgo]

Hello,

I have a situation where I need to update the client_max_body_size nginx config for the loki-gateway, but I don't quite understand where I can update that in the loki helm chart, any ideas? I tried adding it in the httpSnippet variable but it does not change the existing value, only appends it. Many thanks.

[daboom]

same here

[panzouh]

Same here, it would be simple to add clientMaxBodySize: 4M in nginxConfig's block. It would be interesting to add locationSnippets as well to configure keepalive or specific headers.

[asaf400]

I'm still targeting Loki 2.X, so on Chart v5.44.4 which still has the config duplication issue without parameters,
I had to implement a workaround, when supplying chart values, basically inventing a new config value and using it:

gateway:
  nginxConfig:
    # Hack to allow for custom nginx config
    file: | 
      {{- tpl .Values.gateway.nginxConfig.custom_nginx_configfile_template . | indent 2 }}
    
    # Hack to allow for custom nginx config
    # Source from: https://github.com/grafana/loki/blob/helm-loki-5.44.4/production/helm/loki/templates/_helpers.tpl#L648
    custom_nginx_configfile_template: |

      # DO NOT REMOVE EMPTY NEWLINE ABOVE THIS LINE, IT WONT SHOW UP IN FINAL CONFIGMAP BUT IS REQUIRED FOR TEMPLATING
      worker_processes  5;  ## Default: 1
      <.. Rest of config here, with ability for user to modify..>

The upside is that I'm still using official chart source, and no chart modification is required, just values..