nginx: why no access log for rediect location - nginx

Question

My nginx config file goes following:
server {
location /mysite {
auth_request /authVerify;
proxy_pass http://localhost:4200;
error_page 401 = /login;
}
location /authVerify {
proxy_pass_request_body off;
proxy_set_header Content-Length "";
proxy_set_header X-Original-URI $request_uri;
proxy_pass http://localhost:3000;
}
location /login {
proxy_cookie_path / "/; HttpOnly";
proxy_pass http://localhost:3000;
}
location / {
root html;
index index.html index.htm;
}
}
log related configs use the default settings.
the auth_request configration works. But when I send request to /mysite, there is only logging of it in access log, there is no logging of /authVerify although it actually proxy through this locatoin. If I send request to /authVerify directly, there will be loggings as well.
So in the redirect cases how to produce logs for all the locations the request running through?
Update
Based on the comment, I set log_subrequest as on in http block level. After this change, the logs of internal rediect was produced, but the log of original mysite location disappear.
Currently after I send one request to /mysite, the log is as following:
I found the following explanation on nginx doc:
Requests are logged in the context of a location where processing ends. It may be different from the original location, if an internal redirect happens during request processing.
http://nginx.org/en/docs/http/ngx_http_log_module.html
Is that because of that? Any more methods to log the request's entire flow?

Answer 1

Have you tried enabling log_subrequest?
log_subrequest
Context: http, server, and location
Enables or disables logging of sub-requests triggered by internal redirects or SSI requests.
Syntax: on or off
Default value: off