Nginx配置：负载均衡和SSL配置
# openssl genrsa -des3 -out tmp.key 2048 //没有openssl命令，则通过“yum install -y openssl”安装 Generating RSA private key, 2048 bit long modulus...................................................................................+++
.......................................................................................................................................................+++
e is 65537 (0x10001)
Enter pass phrase for tmp.key:
Verifying - Enter pass phrase for tmp.key:
//这一步操作是生成key即“私钥”，2048为加密字符长度，会让我们输入密码，不能太短，否者不成功。
# openssl rsa -in tmp.key -out zlinux.key
Enter pass phrase for tmp.key:
writing RSA key
//把tmp.key转化成zlinux.key，目的是删除刚才设置的密码，如果不清除密码，后面很不方便
# rm -f tmp.key
# openssl req -new -key zlinux.key -out zlinux.csr
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) :CN
State or Province Name (full name) []:JS
Locality Name (eg, city) :SZ
Organization Name (eg, company) :XXLtd
Organizational Unit Name (eg, section) []:zlinux.com
Common Name (eg, your name or your server's hostname) []:ZZ
Email Address []:a@a.com
Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:zzz123456
An optional company name []:z
//生成证书请求文件，key文件和csr文件生成最终的公钥文件。Common Name为后面配置Nginx配置文件server_name
# openssl x509 -req -days 365 -in zlinux.csr -signkey zlinux.key -out zlinux.crt
Signature ok
subject=/C=CN/ST=JS/L=C/O=C/OU=C/CN=zlinux.com/emailAddress=z
Getting Private key
# ls |grep zlinux
zlinux.crt
zlinux.csr
zlinux.key
//最终生成crt证书，也就是公钥
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