Sunstone restarts during image upload

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Interestingly enough, when putting Sunstone behind nginx reverse proxy I do not have the issue. Tested it with 6GB ISO file and found ok.

Below is the nginx config I used:

# No squealing.
server_tokens off;

# OpenNebula Sunstone upstream
upstream sunstone {
  server 127.0.0.1:9869;
}
# OpenNebula websocketproxy upstream
upstream websocketproxy {
  server 127.0.0.1:29876;
}
# OpenNebula FireEdge
upstream fireedge {
  server 127.0.0.1:2616;
}

# HTTP virtual host, redirect to HTTPS
server {
    listen 80 default_server;
    return 301 https://$server_name:443;
}

#
# Example Sunstone configuration (/etc/one/sunstone-server.conf)
#
#:vnc_proxy_port: 127.0.0.1:29876
#:vnc_proxy_support_wss: only
#:vnc_proxy_cert: /etc/ssl/certs/one-selfsigned.crt
#:vnc_proxy_key: /etc/ssl/private/one-selfsigned.key
#:vnc_proxy_ipv6: false
#:vnc_request_password: false
#:vnc_client_port: 443

# HTTPS virtual host, proxy to Sunstone
server {
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name frontend;
    root         /usr/share/nginx/html;

    access_log  /var/log/nginx/opennebula-sunstone-access.log;
    error_log  /var/log/nginx/opennebula-sunstone-error.log;

    client_max_body_size 1G;

    error_page 404 /404.html;
        location = /40x.html {
    }
    error_page 500 502 503 504 /50x.html;
        location = /50x.html {
    }

    location / {
        # Handle inconsistency in the websockify URLs provided by Sunstone
        if ($args ~* "host=.+&port=.+&token=.+&encrypt=.*") {
            rewrite ^/$ /websockify/ last;
        }
        proxy_pass http://sunstone;
        proxy_redirect     off;
        log_not_found      off;
        proxy_set_header   X-Real-IP $remote_addr;
        proxy_set_header   Host $http_host;
        proxy_set_header   X-Forwarded-FOR $proxy_add_x_forwarded_for;
    }

    location /websockify {
        proxy_http_version 1.1;
        proxy_pass https://websocketproxy;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_read_timeout 61s;
        proxy_buffering off;
    }

    ssl_certificate     /etc/ssl/certs/one-selfsigned.crt;
    ssl_certificate_key /etc/ssl/private/one-selfsigned.key;
    ssl_stapling on;
}

##
## OpenNebula XML-RPC proxy (optional)
##
upstream onexmlrpc {
  server 127.0.0.1:2633;
}
upstream vncxmlrpc {
  server 127.0.0.1:2644;
}
server {
    listen       2634 ssl;
    listen       [::]:2634 ssl;
    server_name  frontend;
    root         /usr/share/nginx/html;

    error_page 404 /404.html;
        location = /40x.html {
    }
    error_page 500 502 503 504 /50x.html;
        location = /50x.html {
    }

    location / {
        proxy_http_version 1.1;
        proxy_pass http://onexmlrpc;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $http_host;
        proxy_read_timeout 180s;
        proxy_buffering off;
    }
    location /RPC2/vnctoken {
        proxy_http_version 1.1;
        proxy_pass http://vncxmlrpc;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $http_host;
        proxy_buffering off;
    }

    ssl_certificate     /etc/ssl/certs/one-selfsigned.crt;
    ssl_certificate_key /etc/ssl/private/one-selfsigned.key;
    ssl_stapling on;
}

Grabbed this from Sunstone with Nginx Proxy - Working Configuration.

Seems that I replaced the issue with another one, as I need to find out how to make the nginx setup work as sunstone is complaining that it cannot reach fireedge public endpoint.