Nginxの実際のIPロギングは機能しませんか？

次のnginx設定があります。

worker_processes auto;
daemon off;
error_log /dev/stdout warn;
include /etc/nginx/modules/*.conf;

events {

}

http {
  real_ip_header X-Forwarded-For;
  real_ip_recursive on;
  set_real_ip_from 192.168.2.1;

  server_tokens off;
  default_type application/octet-stream;
  log_format json_combined escape=json
  '{'
  '"remote_addr":"$remote_addr",'
  '"request":"$request",'
  '"real_ip": "$realip_remote_addr",'
  '"http_x_real_ip": "$http_x_real_ip"'
  '}';
  access_log /dev/stdout json_combined;

  server {
    location / {
      root /content/;
    }  
  }
include /etc/nginx/conf.d/*.conf;
}

私の期待は、realip_remote_addr変数がヘッダーに最後に信頼できないアドレスを持たなければならないということですX-Forwarded-For。しかし、私が次のように要求した場合：

$ curl -v --header "X-Forwarded-For:10.1.1.1,192.168.2.1" localhost

ログの表示127.0.0.0.1とremote_addr変数realip_remote_addr。

これは私のnginxバージョンです。

nginx version: nginx/1.16.0
built by gcc 9.1.1 20190503 (Red Hat 9.1.1-1) (GCC) 
built with OpenSSL 1.1.1b FIPS  26 Feb 2019 (running with OpenSSL 1.1.1c FIPS  28 May 2019)
TLS SNI support enabled
configure arguments: --prefix=/usr/share/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib64/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --http-client-body-temp-path=/var/lib/nginx/tmp/client_body --http-proxy-temp-path=/var/lib/nginx/tmp/proxy --http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi --http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi --http-scgi-temp-path=/var/lib/nginx/tmp/scgi --pid-path=/run/nginx.pid --lock-path=/run/lock/subsys/nginx --user=nginx --group=nginx --with-file-aio --with-ipv6 --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-stream_ssl_preread_module --with-http_addition_module --with-http_xslt_module=dynamic --with-http_image_filter_module=dynamic --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_degradation_module --with-http_slice_module --with-http_stub_status_module --with-http_perl_module=dynamic --with-http_auth_request_module --with-mail=dynamic --with-mail_ssl_module --with-pcre --with-pcre-jit --with-stream=dynamic --with-stream_ssl_module --with-google_perftools_module --with-debug --with-cc-opt='-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' --with-ld-opt='-Wl,-z,relro -Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -Wl,-E'

何が間違っているのか、どんなアイデアがありますか？