proxy generate virt hosts apache

generate-hosts.rb

#!/usr/bin/env ruby

base=50000 #port
range="192.168.121."

contents = <<-EOS
Listen %{port} https
<VirtualHost *:%{port}>
  ProxyPass / https://%{ip_address}/
  <Location />
    ProxyPassReverse https://%{ip_address}/
  </Location>
  SSLEngine on
  SSLCertificateFile /etc/pki/tls/certs/localhost.crt
  SSLCertificateKeyFile /etc/pki/tls/private/localhost.key
  ProxyPreserveHost on
  SSLVerifyClient none
  SSLProxyEngine On
  SSLOptions +StdEnvVars +ExportCertData +FakeBasicAuth
  SSLProxyVerify none
  SSLProxyCheckPeerCN off
  SSLProxyCheckPeerName off
  SSLProxyCheckPeerExpire off
</VirtualHost>
EOS

Dir.mkdir("virt_hosts")

255.times do |count|
  filename = "virt_hosts/virt_host_#{count}.conf"
  ip_address = "#{range}#{count}"
  file_contents = contents % {:ip_address => ip_address, :port => (base+count)}
  File.open(filename, 'w') { |file| file.write(file_contents) }
end

run as script in /etc/httpd/conf.d/, then restart httpd

If your dev VM is 192.168.121.143, you will go to my-dev-box.example.com:50143
the port will be 50000 + dev box last digits of VM
192.168.121.012 would be port 50012
192.168.121.232 would be port 50232

I also had to add this line to /etc/httpd/conf/httpd.conf, replacing the existing one, to make apache use subdirs in conf.d
IncludeOptional "/etc/httpd/conf.d/**/*.conf"

This works with:

httpd   2.4.6-67.el7_4.6
mod_ssl 1:2.4.6-67.el7_4.6