KVM SR: resilient: add backend_url promise.

It will force the connection parameters to bubble up to reach the user.

software/kvm/common.cfg

@@ -80,7 +80,7 @@ command =
 [template]
 recipe = slapos.recipe.template
 url = ${:_profile_base_location_}/instance.cfg.in
-#md5sum = bdd0495ef729e7272ec9c97aca919c09
+md5sum = 8617a8cc345a55688c5449528daef4d1
 output = ${buildout:directory}/template.cfg
 mode = 0644
 
@@ -95,7 +95,7 @@ mode = 0644
 recipe = hexagonit.recipe.download
 url = ${:_profile_base_location_}/instance-kvm-resilient.cfg.jinja2
 mode = 644
-md5sum = 0f53856c6f981b34bbe03f6604ccdecb
+md5sum = 45a846378215eded6c001d0dd729a1ec
 download-only = true
 on-update = true
 

software/kvm/instance-kvm-resilient.cfg.jinja2

@@ -13,6 +13,7 @@ parts +=
   {{ parts.replicate("kvm", "3") }}
   publish-connection-informations
   kvm-frontend-url-promise
+  kvm-backend-url-promise
 
 {{ replicated.replicate("kvm", "3", "kvm-export", "kvm-import", slapparameter_dict=slapparameter_dict) }}
 
@@ -41,3 +42,11 @@ input = inline:#!/bin/sh
   fi
 output = ${resilient-directory:promise}/kvm-frontend-url
 mode = 700
+
+[kvm-backend-url-promise]
+# Check that backend url is reachable
+recipe = slapos.cookbook:check_url_available
+path = ${directory:promises}/frontend_promise
+url = ${publish-connection-information:url}
+dash_path = /bin/sh
+curl_path = {{ curl_executable_location }}

software/kvm/instance.cfg.in

@@ -49,10 +49,10 @@ mode = 0644
 recipe = slapos.recipe.template:jinja2
 template = ${template-kvm-resilient-test:location}/instance-kvm-resilient-test.cfg.jinja2
 rendered = $${buildout:directory}/template-kvm-resilient-test.cfg
-bin-directory = ${buildout:bin-directory}
 context =
-    key bin_directory dynamic-template-kvm-resilient-test:bin-directory
     key develop_eggs_directory buildout:develop-eggs-directory
     key eggs_directory buildout:eggs-directory
     key slapparameter_dict slap-configuration:configuration
+    raw bin_directory ${buildout:bin-directory}
+    raw curl-executable-location ${curl:location}/bin/curl
 mode = 0644