Conditional limit_req

[Guilherme]

Hello,

I'm using httpluamodule+redis to make a dynamic proxy to use in a mass
vhost environment. I need to limit requests/s for specifics http_host. I
tried to do something like that:

-------------------------------------------------------------------------------------
limit_req_zone  $http_host  zone=one:10m   rate=1r/s;

upstream redisbackend {
      server 127.0.0.1:6379;
}

server {

        listen xxxxx:80 default_server;

        location = /redis {
            internal;
            redis2_query get $arg_key;
            redis2_pass redisbackend;
        }

        location / {
            default_type 'text/html';
            set $backendserver '';
            set $limit '';

            access_by_lua '
                local key = ngx.var.http_host
                local res = ngx.location.capture(
                    "/redis", { args = { key = key } }
                )

                m = ngx.re.match(res.body, "([a-z]+):([0-9\.]+):([0-9]+)")
                if m ~= nil then
                        user = m[1]
                        ngx.var.backendserver = m[2]
                        ngx.var.limited = tonumber(m[3])
                end
            ';

            if ($limited = 1) {
                limit_req   zone=one  burst=2;
            }

            proxy_set_header X-Forwarded-For $remote_addr;
            proxy_set_header Host $http_host;
            proxy_redirect off;

            proxy_pass http://$backendserver:888;
            break;

        }
}

------------------------------------------------------------------------------------------------------------------------------

When I reload nginx I'm getting the following error:

nginx: [emerg] "limit_req" directive is not allowed here in
/etc/nginx/conf.d/default.conf:64


Is there a way to limit specific websites using just 1 virtual host (server
directive)?

Regards,

Guilherme
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