HyperV: Nova serial console access support

Hyper-V provides a solid interface for accessing serial ports via
named pipes, already employed in the Nova serial console log
implementation.

This patch makes use of this interface by implementing a simple TCP
socket proxy, providing access to instance serial console ports.

DocImpact

Implements: blueprint hyperv-serial-ports

Change-Id: I58c328391a80ee8b81f66b2e09a1bfa4b26e584c

1 files changed, 13 insertions, 2 deletions

diff --git a/nova/virt/hyperv/pathutils.py b/nova/virt/hyperv/pathutils.py
index d97a8b7ca6..48a2038b20 100644
--- a/nova/virt/hyperv/pathutils.py
+++ b/nova/virt/hyperv/pathutils.py
@@ -127,8 +127,19 @@ class PathUtils(pathutils.PathUtils):
         return self._get_instances_sub_dir(dir_name, create_dir=True,
                                            remove_dir=True)
 
-    def get_vm_console_log_paths(self, vm_name, remote_server=None):
-        instance_dir = self.get_instance_dir(vm_name,
+    def get_vm_console_log_paths(self, instance_name, remote_server=None):
+        instance_dir = self.get_instance_dir(instance_name,
                                              remote_server)
         console_log_path = os.path.join(instance_dir, 'console.log')
         return console_log_path, console_log_path + '.1'
+
+    def copy_vm_console_logs(self, instance_name, dest_host):
+        local_log_paths = self.get_vm_console_log_paths(
+            instance_name)
+        remote_log_paths = self.get_vm_console_log_paths(
+            instance_name, remote_server=dest_host)
+
+        for local_log_path, remote_log_path in zip(local_log_paths,
+                                                   remote_log_paths):
+            if self.exists(local_log_path):
+                self.copy(local_log_path, remote_log_path)