Temp openssl conf file for Multiple SAN Self-Signed SSL Cert (used in https://gist.github.com/dwallraff/60cd13d68c7de76335a3)

temp.cnf

[ req ]
distinguished_name     = req_distinguished_name
req_extensions         = server_req_extensions
prompt                 = no

[ req_distinguished_name ]
C                      = <Your country>  # Only 2 characters
ST                     = <Your state>    # Only 2 characters
L                      = <Your city>
O                      = <Your org>
OU                     = <Your OU>
CN                     = <Your URL>
emailAddress           = <Your email address>

####################################################################
[ server_req_extensions ]

keyUsage                    = critical, digitalSignature, keyEncipherment
subjectAltName              = @alternate_names
basicConstraints            = CA:FALSE

####################################################################
[ alternate_names ]

DNS.1  = <SAN 1>
DNS.2  = <SAN 2>
DNS.3  = <SAN 3>
DNS.4  = <SAN 4>

## Standard Spring Cloud Services domains
# DNS.1  = *.sys.<domain>
# DNS.2  = *.apps.<domain>
# DNS.3  = *.login.sys.<domain>
# DNS.4  = *.uaa.sys.<domain>