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From: Stanislaw Kardach <stanislaw.kardach@caviumnetworks.com>
Date: Tue, 15 Mar 2016 15:01:34 +0100
Subject: [PATCH] direct kernel boot for cirros

---
 .../osnailyfacter/modular/astute/upload_cirros.rb  | 58 +++++++++++++++++++++-
 .../puppet/osnailyfacter/templates/vm_libvirt.erb  |  8 ++-
 2 files changed, 63 insertions(+), 3 deletions(-)

diff --git a/deployment/puppet/osnailyfacter/modular/astute/upload_cirros.rb b/deployment/puppet/osnailyfacter/modular/astute/upload_cirros.rb
index 04d597c..c342830 100755
--- a/deployment/puppet/osnailyfacter/modular/astute/upload_cirros.rb
+++ b/deployment/puppet/osnailyfacter/modular/astute/upload_cirros.rb
@@ -1,6 +1,7 @@
 #!/usr/bin/env ruby
 require 'hiera'
 
+
 ENV['LANG'] = 'C'
 
 hiera = Hiera.new(:config => '/etc/hiera.yaml')
@@ -56,11 +57,17 @@ def image_list
     fields = line.split('|').map { |f| f.chomp.strip }
     next if fields[1] == 'ID'
     next unless fields[2]
-    images << fields[2]
+    images << [fields[1], fields[2]]
   end
   {:images => images, :exit_code => return_code}
 end
 
+def image_name_list
+  images = image_list
+  images[:images].map! { |i| i[1] }
+  images
+end
+
 # TODO degorenko: remove --os-image-api-version after liberty (fuel-8.0) release
 def image_create(image_hash)
   command = <<-EOF
@@ -79,6 +86,15 @@ EOF
   [ stdout, return_code ]
 end
 
+# Calls glance update-image with a given property and value
+def update_image(image_id, property, value)
+  command = "/usr/bin/glance image-update --#{property} #{value} #{image_id}"
+  puts command
+  stdout = `#{command}`
+  return_code = $?.exitstatus
+  [ stdout, return_code ]
+end
+
 # check if Glance is online
 # waited until the glance is started because when vCenter used as a glance
 # backend launch may takes up to 1 minute.
@@ -93,7 +109,7 @@ end
 # upload image to Glance
 # if it have not been already uploaded
 def upload_image(image)
-  list_of_images = image_list
+  list_of_images = image_name_list
   if list_of_images[:images].include?(image['img_name']) && list_of_images[:exit_code] == 0
     puts "Image '#{image['img_name']}' is already present!"
     return 0
@@ -109,6 +125,43 @@ def upload_image(image)
   return return_code
 end
 
+# For each disk image try to find a kernel and initramfs images and
+# attach then to it via kernel_id and ramdisk_id glance properties.
+def connect_dependant_images(images)
+  # for each image
+  # get image id from glance
+  img_list = image_list
+  return_code = img_list[:exit_code]
+  if return_code == 0
+    images.each do |image|
+      img_list[:images].each do |il|
+        if il[1] == image['img_name']
+          image['id'] = il[0]
+        end
+      end
+    end
+    # for each image that is not in [aki, ari]
+    images.each do |image|
+      next if ['aki', 'ari'].include?(image['disk_format'])
+      images.each do |i|
+        # find aki/ari image whose name starts with this image's name
+        if i['img_name'].start_with?(image['img_name'])
+          ret = 0
+          if i['disk_format'] == 'aki'
+            _, ret = update_image(image['id'], 'property',
+                                        "kernel_id=#{i['id']}")
+          elsif i['disk_format'] == 'ari'
+            _, ret = update_image(image['id'], 'property',
+                                        "ramdisk_id=#{i['id']}")
+          end
+          return_code += ret
+        end
+      end
+    end
+  end
+  return return_code
+end
+
 ########################
 
 wait_for_glance
@@ -117,6 +170,7 @@ errors = 0
 test_vm_images.each do |image|
   errors += upload_image(image)
 end
+errors = connect_dependant_images(test_vm_images) unless errors != 0
 
 exit 1 unless errors == 0
 
diff --git a/deployment/puppet/osnailyfacter/templates/vm_libvirt.erb b/deployment/puppet/osnailyfacter/templates/vm_libvirt.erb
index 2d030d9..b33fb25 100644
--- a/deployment/puppet/osnailyfacter/templates/vm_libvirt.erb
+++ b/deployment/puppet/osnailyfacter/templates/vm_libvirt.erb
@@ -3,9 +3,15 @@
   <memory unit='GiB'><%= @details['mem'] %></memory>
   <vcpu placement='static'><%= @details['cpu'] %></vcpu>
   <os>
-    <type arch='<%= @machine_arch %>' machine='<%= @machine_type %>'>hvm</type>
+  <type arch='<%= @machine_arch %>' machine='<%= @machine_type %>'>hvm</type>
+  <% if $machine_arch == 'aarch64' %>
+    <kernel>/var/lib/nova/<%= @details['id'] %>_vm.kernel</kernel>
+    <initrd>/var/lib/nova/<%= @details['id'] %>_vm.initramfs</initrd>
+    <cmdline>root=/dev/vda1 rw rootwait console=tty0 console=ttyS0 console=ttyAMA0</cmdline>
+  <% else %>
     <boot dev='network'/>
     <boot dev='hd'/>
+  <% end %>
   </os>
   <features>
     <acpi/>