Don't crash when frontend is not available.

LAMP instances will request frontend instances but will still publish backend URL if frontend is not available.

stack/lamp/buildout.cfg

@@ -19,6 +19,7 @@ extends =
   ../../component/mariadb/buildout.cfg
   ../../component/apache/buildout.cfg
   ../../component/apache-php/buildout.cfg
+  ../../component/dash/buildout.cfg
   ../../component/dcron/buildout.cfg
   ../../component/git/buildout.cfg
   ../../component/glib/buildout.cfg
@@ -68,7 +69,7 @@ mode = 0644
 recipe = slapos.recipe.template
 url = ${:_profile_base_location_}/instance-apache-php.cfg
 output = ${buildout:directory}/template-apache-php.cfg
-md5sum = 2e6dd002baf051e9199d135d9ae22a0b
+md5sum = 7fad5ca60c33f6f5ba91c511f8aaae39
 mode = 0644
 
 [template-apache-backup]

stack/lamp/instance-apache-php.cfg

 [buildout]
 
 parts =
-  url
-  request-mariadb
-  request-frontend
-  apache-php
-  stunnel
   certificate-authority
   ca-stunnel
   logrotate
@@ -14,21 +9,34 @@ parts =
   cron
   cron-entry-logrotate
   promise
+  publish-backend-connection-informations
+  frontend-promise
+  publish-frontend-connection-informations
 
 eggs-directory = ${buildout:eggs-directory}
 develop-eggs-directory = ${buildout:develop-eggs-directory}
 offline = true
 
-[url]
-recipe = slapos.cookbook:publishurl
-url = $${request-frontend:connection-site_url}
-
 [promise]
 recipe = slapos.cookbook:check_port_listening
 path = $${basedirectory:promises}/apache
 hostname = $${apache-php:ip}
 port = $${apache-php:port}
 
+[frontend-promise]
+recipe = slapos.cookbook:check_url_available
+path = $${basedirectory:promises}/frontend
+url = $${request-frontend:connection-site_url}
+dash_path = ${dash:location}/bin/dash
+
+[publish-backend-connection-informations]
+recipe = slapos.cookbook:publish
+backend_url = $${apache-php:url}
+
+[publish-frontend-connection-informations]
+<= publish-backend-connection-informations
+url = $${request-frontend:connection-site_url}
+
 [mariadb-urlparse]
 recipe = slapos.cookbook:urlparse
 url = $${request-mariadb:connection-url}
@@ -44,6 +52,7 @@ pid-file = $${basedirectory:run}/apache.pid
 lock-file = $${basedirectory:run}/apache.lock
 ip = $${slap-network-information:global-ipv6}
 port = 8080
+url = http://[$${:ip}:$${:port}]/
 error-log = $${directory:httpd-log}/error.log
 access-log = $${directory:httpd-log}/access.log
 php-ini-dir = $${directory:php-ini-dir}
@@ -115,7 +124,7 @@ return = url
 recipe = slapos.cookbook:request
 name = Frontend
 # XXX We have hardcoded SR URL here.
-software-url = http://git.erp5.org/gitweb/slapos.git/blob_plain/refs/tags/slapos-0.74:/software/apache-frontend/software.cfg
+software-url = http://git.erp5.org/gitweb/slapos.git/blob_plain/HEAD:/software/apache-frontend/software.cfg
 slave = true
 config = url
 config-url = http://[$${apache-php:ip}]:$${apache-php:port}/