NGINX fails to connect to Nextcloud instance

Question

I have a server running proxmox with 3 VMs: NGINX, Bitwarden and Nextcloud. Bitwarden works fine which proves that NGINX is working ok, however when NGINX tries to connect to Nextcloud it will result in a 502 error. These VMs are configured with bridges and are all accessible by NGINX.

Ideally I would like NGINX to handle SSL.

I am using the Nextcloud AIO docker image, the AIO interface works fine, only traffic proxied through NGINX is resulting in a 502.

Here is the relevant section of my NGINX config:

    server {
        listen 443 ssl;
        server_name nextcloud.verumignis.com;
        ssl_certificate /etc/letsencrypt/live/verumignis.com/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/verumignis.com/privkey.pem;
location /.well-known/acme-challenge/ {
        alias /usr/share/nginx/html/.well-known/acme-challenge/;
        try_files $uri =404;
    }

location / {
    proxy_pass https://192.168.2.48:443;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

server {
    listen 80;
    server_name nextcloud.verumignis.com;

location /.well-known/acme-challenge/ {
        alias /usr/share/nginx/html/.well-known/acme-challenge/;
        try_files $uri =404;
    }

location / {
    proxy_pass http://192.168.2.48:80;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

Here is the error in the NGINX error log:

2023/10/02 00:18:53 [error] 2381#2381: *573 SSL_do_handshake() failed (SSL: error:0A000438:SSL routines::tlsv1 alert internal error:SSL alert number 80) while SSL handshaking to upstream, client: 192.168.1.69, server: nextcloud.verumignis.com, request: "GET / HTTP/2.0", upstream: "https://192.168.2.48:443/", host: "nextcloud.verumignis.com", referrer: "https://192.168.2.48:8080/"

When ports 80 and 443 are forwarded directly to Nextcloud it works fine, but obviously that breaks the other services running.

Any help is much appreciated, thanks in advance.

NGINX fails to connect to Nextcloud instance

0 Answers0