Reverse proxy in Rstudio Connect configuration

[ac_mattos]

Hello,

I'm trying to set up the Rstudio Connect and right now do the reverse proxy trough nginx.

In this post: https://docs.rstudio.com/connect/admin/running-a-proxy.html#nginx-as-reverse-proxy
there are some examples for the configuration file but they don't tell where those editions needs to happen and so i don't know if the edition should be made in

/etc/nginx/nginx.conf

or

/etc/nginx/sites-enabled/default

The second one i took from this guide: https://deanattali.com/2015/05/09/setup-rstudio-shiny-server-digital-ocean/#install-r
which is a guide for install Shiny Server and not RStudio Connect.

I tried to both suggestions of edition in /etc/nginx/sites-enabled/default file, but did not work.

Can anyone please clarify this for me?

Thanks in advance.

[andresrcs]

Can you show your /etc/nginx/sites-enabled/default file?

[ac_mattos]

Hello andresrcs,

Of course. I don't know to copy text from the ubuntu terminal (i tried ctrl+shift+c but did not work), so i will put the print screens in sequence.

Everything below that is in comment.

[andresrcs]

Screenshots are not very useful, typically on a Linux terminal, text gets copied just by selecting it.
Also, you have made no changes to the file, can you show what you have tried that is not working?

[ac_mattos]

Ah, there it is, thank you.

Yes, i deleted the changes to start from the beggining.

First try was to put this block of code in "/etc/nginx/sites-enabled/default" file:

http {
  map $http_upgrade $connection_upgrade {
    default upgrade;
    ''      close;
  }
  server {
    listen 80;

    client_max_body_size 0; # Disables checking of client request body size

    location /rsconnect/ {
      rewrite ^/rsconnect/(.*)$ /$1 break;
      proxy_set_header X-RSC-Request $scheme://$host:$server_port$request_uri;
      proxy_pass http://MyIP_adress:3939;
      proxy_redirect / /rsconnect/;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection $connection_upgrade;
      proxy_http_version 1.1;
    }
  }
}

Did not work.
Second, i tried to put this same block of code in "/etc/nginx/nginx.conf" file.
Also did not work.

The third try was put this next block of code in "/etc/nginx/sites-enabled/default", first part before the server{...} and the other part right after the server_name _; as described in Dean Attali tutorial.

map $http_upgrade $connection_upgrade {
  default upgrade;
  ''      close;
}

location /rsconnect/ {
  proxy_pass http://MyIP_adress:3939/;
  proxy_http_version 1.1;
  proxy_set_header Upgrade $http_upgrade;
  proxy_set_header Connection $connection_upgrade;
  rewrite ^(/rsconnect/[^/]+)$ $1/ permanent;
}

[andresrcs]

@ac_mattos

proxy_pass http://MyIP_adress:3939;

I'm assuing this is just illustrative and you have used some IP, it was your public IP or local IP? can you try using localhost instead?, try with this

map $http_upgrade $connection_upgrade {
      default upgrade;
      ''      close;
    }

server {
        listen 80 default_server;
        listen [::]:80 default_server;

        root /var/www/html;

        index index.html index.htm;

        server_name _;

        client_max_body_size 0; # Disables checking of client request body size

    	location /rsconnect/ {
      		rewrite ^/rsconnect/(.*)$ /$1 break;
      		proxy_set_header X-RSC-Request $scheme://$host:$server_port$request_uri;
      		proxy_pass http://localhost:3939;
      		proxy_redirect / /rsconnect/;
      		proxy_set_header Upgrade $http_upgrade;
      		proxy_set_header Connection $connection_upgrade;
      		proxy_http_version 1.1;
    	}

        location / {
                try_files $uri $uri/ =404;
        }
}

Also, just to rule out the basics, have you restarted the nginx server after updating the config file?

[ac_mattos]

Yes, i used the IP from the DO droplet. I think it is a public IP.
I can let "localhost" in the code, instead of the IP address?

Yes, i restarted it after each try!

This block of code enters in the "/etc/nginx/sites-enabled/default" file? And it substitute the whole default code? or i have to add it in some specific place?

I will try this in a few minutes and return here. Thank you.

[andresrcs]

@ac_mattos

I can let "localhost" in the code, instead of the IP address?

I think you should

@ac_mattos

This block of code enters in the "/etc/nginx/sites-enabled/default" file? And it substitute the whole default code?

Yes

[ac_mattos]

Bingo andresrcs!

This totally worked.

I don't know what was my mistake in the first try, maybe some digitation mistake.

Anyway, thank you very much!

Wish you the best.