diff --git a/devops-service/db/mongo/models/deploy_env/cloud_deploy_env.rb b/devops-service/db/mongo/models/deploy_env/cloud_deploy_env.rb
index dc7825e..6b2afd5 100644
--- a/devops-service/db/mongo/models/deploy_env/cloud_deploy_env.rb
+++ b/devops-service/db/mongo/models/deploy_env/cloud_deploy_env.rb
@@ -1,12 +1,5 @@
 require "db/mongo/models/deploy_env/deploy_env_base"
-require "db/validators/deploy_env/run_list"
-require "db/validators/deploy_env/expiration"
-require "db/validators/deploy_env/flavor"
-require "db/validators/deploy_env/image"
-require "db/validators/deploy_env/subnet_not_empty"
-require "db/validators/deploy_env/subnet_belongs_to_provider"
-require "db/validators/deploy_env/groups"
-require "db/validators/deploy_env/stack_template"
+require "db/validators/deploy_env/cloud_parameters"
 
 module Devops
   module Model
@@ -25,12 +18,15 @@ module Devops
             :groups => {:type => Array, :empty => false},
             :stack_template => {:type => String, :empty => false, :nil => true}
 
+=begin
       set_validators ::Validators::DeployEnv::Flavor,
                      ::Validators::DeployEnv::Image,
                      ::Validators::DeployEnv::SubnetNotEmpty,
                      ::Validators::DeployEnv::SubnetBelongsToProvider,
                      ::Validators::DeployEnv::Groups,
                      ::Validators::DeployEnv::StackTemplate
+=end
+      set_validators ::Validators::DeployEnv::CloudParameters
 
       def initialize d={}
         super(d)
diff --git a/devops-service/db/validators/deploy_env/cloud_parameters.rb b/devops-service/db/validators/deploy_env/cloud_parameters.rb
new file mode 100644
index 0000000..4e6fc59
--- /dev/null
+++ b/devops-service/db/validators/deploy_env/cloud_parameters.rb
@@ -0,0 +1,40 @@
+require "db/validators/deploy_env/flavor"
+require "db/validators/deploy_env/image"
+require "db/validators/deploy_env/subnet_not_empty"
+require "db/validators/deploy_env/subnet_belongs_to_provider"
+require "db/validators/deploy_env/groups"
+require "db/validators/deploy_env/stack_template"
+
+module Validators
+  class DeployEnv::CloudParameters < Base
+
+    def valid?
+      is_stack = !@model.stack_template.nil?
+      is_server_params = !@model.flavor.nil? or !@model.image.nil? or !@model.subnets.nil? or !@model.groups.nil?
+      if !is_server_params and !is_stack
+        @msg = "You should define 'stack_template' or all instance parameters (image, flavor, subnets, groups)"
+        return false
+      end
+      if is_stack
+        StackTemplate.new(@model).validate!
+      end
+      if is_server_params
+        Flavor.new(@model).validate!
+        Image.new(@model).validate!
+        SubnetNotEmpty.new(@model).validate!
+        SubnetBelongsToProvider.new(@model).validate!
+        Groups.new(@model).validate!
+      end
+      return true
+    rescue InvalidRecord => e
+      @msg = e.message
+      return false
+    end
+
+    def message
+      @msg
+    end
+
+  end
+end
+