813: add ability to change stack's stack_template

devops-client/lib/devops-client/handler/stack.rb

@@ -41,6 +41,9 @@ class Stack < Handler
       else
         output
       end
+    when :change_stack_template
+      change_stack_template_handler
+      output
     end
   end
 
@@ -136,6 +139,16 @@ class Stack < Handler
     puts response.inspect
   end
 
+  def change_stack_template_handler
+    stack_id, template_id = @args[2], @args[3]
+    r = inspect_parameters(@options_parser.delete_params, stack_id, template_id)
+    unless r.nil?
+      @options_parser.invalid_change_stack_template_command
+      abort(r)
+    end
+    @show = put("/stack/#{stack_id}/stack_template", {stack_template: template_id})
+  end
+
   private
 
   def provider_stacks(provider)

devops-client/lib/devops-client/options/stack_options.rb

@@ -2,7 +2,7 @@ require "devops-client/options/common_options"
 
 class StackOptions < CommonOptions
 
-  commands :create, :delete, :list, :show, :sync, :resources, :deploy, :reserve, :unreserve
+  commands :create, :delete, :list, :show, :sync, :resources, :deploy, :reserve, :unreserve, :change_stack_template
 
   def initialize args, def_options
     super(args, def_options)
@@ -15,6 +15,7 @@ class StackOptions < CommonOptions
     self.resources_params = ["STACK"]
     self.deploy_params = ["STACK"]
     self.reserve_params = ["STACK"]
+    self.change_stack_template_params = %w(STACK STACK_TEMPLATE)
   end
 
   def create_options

devops-service/app/api2/handlers/stack.rb

@@ -203,6 +203,13 @@ module Devops
           end
         end
 
+        def change_stack_template(stack_id)
+          stack_template_id = parser.change_stack_template
+          Devops::Db.connector.stack_template(stack_template_id)
+          stack = Devops::Db.connector.stack(stack_id)
+          stack.change_stack_template!(stack_template_id)
+        end
+
       end
     end
   end

devops-service/app/api2/parsers/stack.rb

@@ -38,6 +38,12 @@ module Devops
           @body
         end
 
+        def change_stack_template
+          template_id = create_object_from_json_body['stack_template']
+          check_string(template_id, "Parameter 'stack_template' must be a not empty string")
+          template_id
+        end
+
       end
     end
   end

devops-service/app/api2/routes/stack.rb

@@ -187,6 +187,25 @@ module Devops
           }
           app.multi_routes "/stack/:id/tags", {:headers => [:content_type]}, hash
 
+          # Change stack stack_template
+          #
+          # * *Request*
+          #   - method : PUT
+          #   - headers :
+          #     - Accept: application/json
+          #     - Content-Type: application/json
+          #   - body :
+          #     {
+          #       "stack_template": "template_id"
+          #     }
+          #
+          # * *Returns* :
+          #   200 - OK
+          app.put_with_headers "/stack/:id/stack_template", :headers => [:accept, :content_type] do |id|
+            check_privileges("stack", "r")
+            json Devops::API2_0::Handler::Stack.new(request).change_stack_template(id)
+          end
+
           puts "Stack routes initialized"
         end
 

devops-service/db/mongo/models/stack/stack_ec2.rb

@@ -18,6 +18,23 @@ module Devops
         result
       end
 
+      def update_in_cloud!(params)
+        parameters = params.keep_if do |key, value|
+          %w(Parameters TemplateBody TemplateURL Capabilities)
+        end
+
+        provider_instance.update_stack(self, parameters)
+      end
+
+      # We should improve this functionality: stack will be rollbacked
+      # if there are errors during stack_template changing, so we should track
+      # that process and persist changes only in case of success.
+      def change_stack_template!(stack_template)
+        self.stack_template = stack_template
+        update_in_cloud!('TemplateBody' => template_body)
+        Devops::Db.connector.stack_update(self)
+      end
+
     end
   end
 end

devops-service/providers/ec2.rb

@@ -261,6 +261,10 @@ module Provider
       end
     end
 
+    def update_stack(stack, params)
+      cloud_formation.update_stack(stack.name, params)
+    end
+
     def set_stack_tags stack, out=""
       tags = {
 #        "cid:remoteUser" => s.remote_user