superb-sjlim opened a new issue, #652:
URL: https://github.com/apache/apisix-helm-chart/issues/652

   Hello,
   
   I am trying to add some NGINX configuration using configmap but somehow the 
error is occurring right this,
   
   ```
   2023/10/26 12:38:03 [emerg] 1#1: unknown directive 
"client_header_buffer_size:" in /usr/local/apisix/conf/nginx.conf:267
   nginx: [emerg] unknown directive "client_header_buffer_size:" in 
/usr/local/apisix/conf/nginx.conf:267
   ``` 
   
   What i added to under the nginx_conf..
   
   ```
   nginx_config:    # config for render the template to genarate nginx.conf
         error_log: "/dev/stderr"
         error_log_level: "warn"    # warn,error
         worker_processes: "auto"
         enable_cpu_affinity: true
         worker_rlimit_nofile: 20480  # the number of files a worker process 
can open, should be larger than worker_connections
         event:
           worker_connections: 10620
         http_server_configuration_snippet: |
           client_header_buffer_size: 1k
         http:
           enable_access_log: true
           access_log: "/dev/stdout"
           access_log_format: '$remote_addr - $remote_user [$time_local] 
$http_host \"$request\" $status $body_bytes_sent $request_time 
\"$http_referer\" \"$http_user_agent\" $upstream_addr $upstream_status 
$upstream_response_time \"$upstream_scheme://$upstream_host$upstream_uri\"'
           access_log_format_escape: default
           keepalive_timeout: "60s"
           client_header_timeout: 70s     # timeout for reading client request 
header, then 408 (Request Time-out) error is returned to the client        
           client_body_timeout: 60s       # timeout for reading client request 
body, then 408 (Request Time-out) error is returned to the client
           send_timeout: 60s              # timeout for transmitting a response 
to the client.then the connection is closed
           underscores_in_headers: "off"   # default enables the use of 
underscores in client request header fields
           client_header_buffer_size: 1k
           real_ip_header: "X-Real-IP"    # 
http://nginx.org/en/docs/http/ngx_http_realip_module.html#real_ip_header
           real_ip_from:                  # 
http://nginx.org/en/docs/http/ngx_http_realip_module.html#set_real_ip_from
             - 127.0.0.1
             - 'unix:'#
   ``` 
   
   I also tried to use the next snippets,
   main_configuration_snippet
   http_configuration_snippet
   http_end_configuration_snippet
   http_server_configuration_snippet
   http_admin_configuration_snippet
   but all snippet returned same error message.
   
   Moreover, I even added it under the http section but it is not applied to 
the inside of nginx.conf file on K8s POD.
   
   Could anyone can tell me what i am doing wrong?
   
   Thank you in advance.
   


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