Merge branch 'apache'

slapos/recipe/README.apache_frontend.txt

 apache_frontend
 ==========
 
-Frontend using Apache, allowing to rewrite and proxy URLs like myinstance.myfrontenddomainname.com to real IP/URL of myinstance.
\ No newline at end of file
+Frontend using Apache, allowing to rewrite and proxy URLs like
+myinstance.myfrontenddomainname.com to real IP/URL of myinstance.
+
+apache_frontend works using the master instance / slave instance design.
+It means that a single main instance of Apache will be used to act as frontend
+for many slaves.
+
+
+How to use
+========
+First, you will need to request a "master" instance of Apache Frontend with
+"domain" parameter, like : 
+<?xml version='1.0' encoding='utf-8'?>
+<instance>
+ <parameter id="domain">moulefrite.com</parameter>
+ <parameter id="port">443</parameter>
+</instance>
+
+Then, it is possible to request many slave instances
+(currently only from slapconsole, UI doesn't work yet)
+of Apache Frontend, like : 
+instance = request(
+       software_release=apache_frontend,
+       partition_reference='frontend2',
+       shared=True,
+       partition_parameter_kw={"url":"https://[1:2:3:4]:1234/someresource"}
+     )
+Those slave instances will be redirected to the "master" instance,
+and you will see on the "master" instance the associated RewriteRules of
+all slave instances.
+
+Finally, the slave instance will be accessible from :
+https://someidentifier.moulefrite.com.