feat: add configurable real_ip_header option for nginx

charts/apisix/templates/configmap.yaml

@@ -202,7 +202,7 @@ data:
         client_body_timeout: 60s       # timeout for reading client request body, then 408 (Request Time-out) error is returned to the client
         send_timeout: 10s              # timeout for transmitting a response to the client.then the connection is closed
         underscores_in_headers: "on"   # default enables the use of underscores in client request header fields
-        real_ip_header: "X-Real-IP"    # http://nginx.org/en/docs/http/ngx_http_realip_module.html#real_ip_header
+        real_ip_header: {{ .Values.apisix.nginx.realIpHeader | quote }}    # 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:'

charts/apisix/values.yaml

@@ -418,6 +418,9 @@ apisix:
     enableCPUAffinity: true
     # -- Timeout during which a keep-alive client connection will stay open on the server side.
     keepaliveTimeout: 60s
+    # -- The name of the header from which to extract the real client IP address
+    # http://nginx.org/en/docs/http/ngx_http_realip_module.html#real_ip_header
+    realIpHeader: "X-Real-IP"
     envs: []
     # access log and error log configuration
     logs: