feat(LinstorSR): is now compatible with python 3

Signed-off-by: Ronan Abhamon <[email protected]>

drivers/LinstorSR.py

@@ -934,7 +934,7 @@ def _update_drbd_reactor_on_all_hosts(
         secondary_hosts = []
 
         hosts = self.session.xenapi.host.get_all_records()
-        for host_ref, host_rec in hosts.iteritems():
+        for host_ref, host_rec in hosts.items():
             hostname = host_rec['hostname']
             if controller_node_name == hostname:
                 controller_host = host_ref
@@ -1045,7 +1045,7 @@ def _update_physical_size(self):
         # We use the size of the smallest disk, this is an approximation that
         # ensures the displayed physical size is reachable by the user.
         (min_physical_size, pool_count) = self._linstor.get_min_physical_size()
-        self.physical_size = min_physical_size * pool_count / \
+        self.physical_size = min_physical_size * pool_count // \
             self._linstor.redundancy
 
         self.physical_utilisation = self._linstor.allocated_volume_size
@@ -1497,17 +1497,16 @@ def _undo_clone(self, volume_names, vdi_uuid, base_uuid, snap_uuid):
     # --------------------------------------------------------------------------
 
     def _create_linstor_cache(self):
-        # TODO: use a nonlocal with python3.
-        class context:
-            reconnect = False
+        reconnect = False
 
         def create_cache():
+            nonlocal reconnect
             try:
-                if context.reconnect:
+                if reconnect:
                     self._reconnect()
                 return self._linstor.get_volumes_with_info()
             except Exception as e:
-                context.reconnect = True
+                reconnect = True
                 raise e
 
         self._all_volume_metadata_cache = \
@@ -2649,7 +2648,7 @@ def _start_persistent_nbd_server(self, volume_name):
                 '--nbd-name',
                 volume_name,
                 '--urls',
-                ','.join(map(lambda ip: 'http://' + ip + ':' + port, ips)),
+                ','.join(['http://' + ip + ':' + port for ip in ips]),
                 '--device-size',
                 str(device_size)
             ]

drivers/cleanup.py

@@ -933,7 +933,7 @@ def _coalesceVHD(self, timeOut):
                 util.SMlog('Coalesce failed on %s, attempting repair on ' \
                            'parent %s' % (self.uuid, parent))
                 self.repair(parent)
-            except Exception, e:
+            except Exception as e:
                 util.SMlog('(error ignored) Failed to repair parent %s ' \
                            'after failed coalesce on %s, err: %s' %
                            (parent, self.path, e))
@@ -3193,7 +3193,7 @@ def _finishInterruptedCoalesceLeaf(self, childUuid, parentUuid):
     def _checkSlaves(self, vdi):
         try:
             all_openers = self._linstor.get_volume_openers(vdi.uuid)
-            for openers in all_openers.itervalues():
+            for openers in all_openers.values():
                 for opener in openers.values():
                     if opener['process-name'] != 'tapdisk':
                         raise util.SMException(

drivers/linstor-manager

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright (C) 2020  Vates SAS - [email protected]
 #
@@ -622,10 +622,10 @@ def add_host(session, args):
         for pbd_ref, pbd in pbds:
             device_config = pbd['device_config']
 
-            hosts = filter(
+            hosts = list(filter(
                 lambda host: len(host.strip()),
                 device_config.get('hosts', []).split(',')
-            )
+            ))
             hosts.append(node_name)
             hosts = ','.join(list(set(hosts)))
 

drivers/linstorvhdutil.py

@@ -25,9 +25,6 @@
 
 MANAGER_PLUGIN = 'linstor-manager'
 
-# EMEDIUMTYPE constant (124) is not available in python2.
-EMEDIUMTYPE = 124
-
 
 def call_vhd_util_on_host(session, host_ref, method, device_path, args):
     try:
@@ -105,7 +102,7 @@ def wrapper(*args, **kwargs):
                 'groupName': self._linstor.group_name
             }
             remote_args.update(**kwargs)
-            remote_args = {str(key): str(value) for key, value in remote_args.iteritems()}
+            remote_args = {str(key): str(value) for key, value in remote_args.items()}
 
             try:
                 def remote_call():
@@ -331,7 +328,7 @@ def local_call():
                 try:
                     return local_method(device_path, *args, **kwargs)
                 except util.CommandException as e:
-                    if e.code == errno.EROFS or e.code == EMEDIUMTYPE:
+                    if e.code == errno.EROFS or e.code == errno.EMEDIUMTYPE:
                         raise ErofsLinstorCallException(e)  # Break retry calls.
                     if e.code == errno.ENOENT:
                         raise NoPathLinstorCallException(e)
@@ -380,7 +377,7 @@ def _call_vhd_util(self, local_method, remote_method, device_path, use_parent, *
             'groupName': self._linstor.group_name
         }
         remote_args.update(**kwargs)
-        remote_args = {str(key): str(value) for key, value in remote_args.iteritems()}
+        remote_args = {str(key): str(value) for key, value in remote_args.items()}
 
         volume_uuid = self._linstor.get_volume_uuid_from_device_path(
             device_path
@@ -403,12 +400,12 @@ def remote_call():
                 )
 
             no_host_found = True
-            for hostname, openers in all_openers.iteritems():
+            for hostname, openers in all_openers.items():
                 if not openers:
                     continue
 
                 try:
-                    host_ref = next(ref for ref, rec in hosts.iteritems() if rec['hostname'] == hostname)
+                    host_ref = next(ref for ref, rec in hosts.items() if rec['hostname'] == hostname)
                 except StopIteration:
                     continue
 

drivers/linstorvolumemanager.py

@@ -526,8 +526,8 @@ def allocated_volume_size(self):
                 current[volume.number] = max(current_size, current.get(volume.number) or 0)
 
         total_size = 0
-        for volumes in sizes.itervalues():
-            for size in volumes.itervalues():
+        for volumes in sizes.values():
+            for size in volumes.values():
                 total_size += size
 
         return total_size * 1024
@@ -1638,8 +1638,8 @@ def _create_sr(
 
         lin = cls._create_linstor_instance(uri, keep_uri_unmodified=True)
 
-        node_names = ips.keys()
-        for node_name, ip in ips.iteritems():
+        node_names = list(ips.keys())
+        for node_name, ip in ips.items():
             while True:
                 # Try to create node.
                 result = lin.node_create(
@@ -2204,13 +2204,13 @@ def _find_device_path(self, volume_uuid, volume_name):
     def _request_device_path(self, volume_uuid, volume_name, activate=False):
         node_name = socket.gethostname()
 
-        resources = filter(
+        resource = next(filter(
             lambda resource: resource.node_name == node_name and
             resource.name == volume_name,
             self._get_resource_cache().resources
-        )
+        ), None)
 
-        if not resources:
+        if not resource:
             if activate:
                 self._mark_resource_cache_as_dirty()
                 self._activate_device_path(
@@ -2222,7 +2222,7 @@ def _request_device_path(self, volume_uuid, volume_name, activate=False):
                 .format(volume_uuid)
             )
         # Contains a path of the /dev/drbd<id> form.
-        return resources[0].volumes[0].device_path
+        return resource.volumes[0].device_path
 
     def _destroy_resource(self, resource_name, force=False):
         result = self._linstor.resource_dfn_delete(resource_name)
@@ -2240,7 +2240,7 @@ def _destroy_resource(self, resource_name, force=False):
 
         # If force is used, ensure there is no opener.
         all_openers = get_all_volume_openers(resource_name, '0')
-        for openers in all_openers.itervalues():
+        for openers in all_openers.values():
             if openers:
                 self._mark_resource_cache_as_dirty()
                 raise LinstorVolumeManagerError(
@@ -2506,18 +2506,18 @@ def _request_database_path(cls, lin, activate=False):
         node_name = socket.gethostname()
 
         try:
-            resources = filter(
+            resource = next(filter(
                 lambda resource: resource.node_name == node_name and
                 resource.name == DATABASE_VOLUME_NAME,
                 lin.resource_list_raise().resources
-            )
+            ), None)
         except Exception as e:
             raise LinstorVolumeManagerError(
                 'Unable to get resources during database creation: {}'
                 .format(e)
             )
 
-        if not resources:
+        if not resource:
             if activate:
                 cls._activate_device_path(
                     lin, node_name, DATABASE_VOLUME_NAME
@@ -2530,7 +2530,7 @@ def _request_database_path(cls, lin, activate=False):
                 .format(DATABASE_PATH)
             )
         # Contains a path of the /dev/drbd<id> form.
-        return resources[0].volumes[0].device_path
+        return resource.volumes[0].device_path
 
     @classmethod
     def _create_database_volume(
@@ -2565,7 +2565,7 @@ def _create_database_volume(
             )
 
         # Ensure we have a correct list of storage pools.
-        nodes_with_pool = map(lambda pool: pool.node_name, pools.storage_pools)
+        nodes_with_pool = [pool.node_name for pool in pools.storage_pools]
         assert nodes_with_pool  # We must have at least one storage pool!
         for node_name in nodes_with_pool:
             assert node_name in node_names
@@ -2815,7 +2815,7 @@ def _check_volume_creation_errors(cls, result, volume_uuid, group_name):
     def _move_files(cls, src_dir, dest_dir, force=False):
         def listdir(dir):
             ignored = ['lost+found']
-            return filter(lambda file: file not in ignored, os.listdir(dir))
+            return [file for file in os.listdir(dir) if file not in ignored]
 
         try:
             if not force:

drivers/util.py

@@ -751,7 +751,7 @@ def get_this_host_address(session):
 def get_host_addresses(session):
     addresses = []
     hosts = session.xenapi.host.get_all_records()
-    for record in hosts.itervalues():
+    for record in hosts.values():
         addresses.append(record['address'])
     return addresses
 

scripts/fork-log-daemon

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import select
 import signal

scripts/linstor-kv-tool

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright (C) 2022  Vates SAS
 #

scripts/safe-umount

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 
 import argparse
 import subprocess