How to use nginx as reverse proxy send all requests to varnish

Solution 1:

I can come up with 3 possible solutions:

Don't worry about plain HTTP on port 80 and just let Varnish handle it
Create a vhost for plain HTTP
- Configure Varnish to listen on port 6081
- Copy the server block from your Nginx configuration
- Adjust the block to make sure it listens on port 80
- Remove the SSL bits from the duplicated server block
- Make sure your proxy all requests to port 6081
Create a redirection vhost for plain HTTP
- Configure Varnish to listen on port 6081
- Create a server block that redirects all HTTP requests to the HTTPS equivalent