只是强调一下：
ssl_certificate放的是fullchain
ssl_certificate_key放的是privatekey

ssl_certificate      /etc/nginx/my_ssl_cert/fullchain1.pem;  ## Location of your public PEM file.
ssl_certificate_key  /etc/nginx/my_ssl_cert/privkey1.pem;  ## Location of your private PEM file.
ssl_session_cache shared:SSL:10m;