Subcommand "restart"

src/etc/command_help.txt

@@ -2,6 +2,7 @@ Commands for Operation:
   up          Bring up the whole instance, a project or service(s) inside a project
   down        Bring down the whole instance, a project or service(s) inside a project
   update      Update the whole instance, a project or service(s) inside a project
+  restart     Restart the whole instance, a project or service(s) inside a project
   purge       Remove all running docker artifacts of this instance
 
 Commands for Instance Management:

src/kiwi/subcommands/__init__.py

@@ -13,6 +13,7 @@ from .new import NewCommand
 from .pull import PullCommand
 from .purge import PurgeCommand
 from .push import PushCommand
+from .restart import RestartCommand
 from .shell import ShellCommand
 from .up import UpCommand
 from .update import UpdateCommand
@@ -33,6 +34,7 @@ __all__ = [
     'PullCommand',
     'PurgeCommand',
     'PushCommand',
+    'RestartCommand',
     'ShellCommand',
     'UpCommand',
     'UpdateCommand',

src/kiwi/subcommands/restart.py

@@ -0,0 +1,26 @@
+# local
+from ..subcommand import ServiceCommand
+from ..misc import are_you_sure
+
+
+class RestartCommand(ServiceCommand):
+    """kiwi restart"""
+
+    def __init__(self):
+        super().__init__(
+            'restart', num_projects='?', num_services='*',
+            action="Restarting",
+            description="Restart the whole instance, a project or service(s) inside a project"
+        )
+
+    def _run_instance(self, runner, args):
+        if are_you_sure([
+            "This will restart the entire instance."
+        ]):
+            return super()._run_instance(runner, args)
+
+        return False
+
+    def _run_services(self, runner, args, project, services):
+        project.compose_run(['restart', *services])
+        return True