T22 initial provisioning

Differential Revision: D64848754

fbshipit-source-id: 66b93ecbec6bac2eaee82bc901c1fcab08b96176

Author: Sergei Iudin

cookbooks/fb_storage/attributes/default.rb

@@ -49,4 +49,6 @@
   ],
   '_clowntown_device_order_method' => nil,
   '_clowntown_override_file_method' => nil,
+  '_skip_persistency' => [],
+  '_skip_extra_devices' => [],
 }

cookbooks/fb_storage/libraries/storage.rb

@@ -182,8 +182,12 @@ def self.eligible_devices(node)
       # Legacy. We should probably fail hard here
       return [] if devices_to_skip.length.zero?
 
+      non_eligle = ['ram', 'loop', 'dm-', 'sr', 'md']
+      if node&.dig('fb_storage', '_skip_extra_devices')
+        non_eligle += node['fb_storage']['_skip_extra_devices']
+      end
       node['block_device'].to_hash.reject do |x, _y|
-        ['ram', 'loop', 'dm-', 'sr', 'md'].include?(x.delete('0-9')) ||
+        non_eligle.include?(x.delete('0-9')) ||
         devices_to_skip.include?(x)
       end.keys
     end
@@ -494,6 +498,10 @@ def self.gen_persistent_disk_data(disks)
       Dir.open(DEV_ID_DIR).each do |entry|
         next if %w{. ..}.include?(entry)
 
+        if ::Chef.node&.dig('fb_storage', '_skip_persistency')
+          next if ::Chef.node['fb_storage']['_skip_persistency'].any? { |element| entry.include?(element) }
+        end
+
         p = "#{DEV_ID_DIR}/#{entry}"
         id_map[File.basename(File.readlink(p))] = entry
       end