Merge pull request #294 from bkkrw/lxc-attach_support

Add fallback mechanism for platforms without attach support

lib/vagrant-lxc/action.rb

@@ -197,8 +197,14 @@ def self.action_package
       def self.action_fetch_ip
         Builder.new.tap do |b|
           b.use Builtin::ConfigValidate
-          b.use FetchIpWithLxcAttach
-          b.use FetchIpFromDnsmasqLeases
+          b.use Builtin::Call, Builtin::IsState, :running do |env, b2|
+            if env[:result]
+              b2.use FetchIpWithLxcAttach if env[:machine].provider.driver.supports_attach?
+              b2.use FetchIpFromDnsmasqLeases
+            else
+              b2.use Builtin::Message, I18n.t("vagrant_lxc.messages.not_running")
+            end
+          end
         end
       end
 

lib/vagrant-lxc/driver.rb

@@ -113,6 +113,10 @@ def destroy
         @cli.destroy
       end
 
+      def supports_attach?
+        @cli.supports_attach?
+      end
+
       def attach(*command)
         @cli.attach(*command)
       end

lib/vagrant-lxc/driver/cli.rb

@@ -77,7 +77,7 @@ def start(options = [])
         end
 
         def stop
-          attach '/sbin/halt'
+          attach '/sbin/halt' if supports_attach?
           run :stop, '--name', @name
         end
 
@@ -126,6 +126,19 @@ def transition_to(target_state, tries = 30, timeout = 1, &block)
           end
         end
 
+        def supports_attach?
+          unless defined?(@supports_attach)
+            begin
+              @supports_attach = true
+              run(:attach, '--name', @name, 'true')
+            rescue LXC::Errors::ExecuteError
+              @supports_attach = false
+            end
+          end
+
+          return @supports_attach
+        end
+
         private
 
         def run(command, *args)