1. openssl genrsa -des3 -out server.key 1024
    2. openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout server.key -out server.crt

    lQLPJxZnr3Zjl7DNAZTNBMiwjXjbR5N1ReQCqvHH1ED5AA_1224_404.png
    Common Name根据域名或者ip生成