Add equivalent of bind-recursive option to the Mount type class

With the recursive mount behavior change in Docker 25, it is not
possible to make recursive mounts writable with the current API. Add the
`recursive` option which is equivalent of bind-recursive in CLI. This
also allows for setting the mount to be non-recursive (added earlier in
API v1.41).

Signed-off-by: Jan Čermák <[email protected]>

docker/types/services.py

@@ -235,6 +235,9 @@ class Mount(dict):
         ``default```, ``consistent``, ``cached``, ``delegated``.
         propagation (string): A propagation mode with the value ``[r]private``,
           ``[r]shared``, or ``[r]slave``. Only valid for the ``bind`` type.
+        recursive (string): Bind mount recursive mode,  one of ``enabled``,
+          ``disabled``, ``writable``, or ``readonly``. Only valid for the
+          ``bind`` type.
         no_copy (bool): False if the volume should be populated with the data
           from the target. Default: ``False``. Only valid for the ``volume``
           type.
@@ -247,9 +250,9 @@ class Mount(dict):
     """
 
     def __init__(self, target, source, type='volume', read_only=False,
-                 consistency=None, propagation=None, no_copy=False,
-                 labels=None, driver_config=None, tmpfs_size=None,
-                 tmpfs_mode=None):
+                 consistency=None, propagation=None, recursive=None,
+                 no_copy=False, labels=None, driver_config=None,
+                 tmpfs_size=None, tmpfs_mode=None):
         self['Target'] = target
         self['Source'] = source
         if type not in ('bind', 'volume', 'tmpfs', 'npipe'):
@@ -267,6 +270,21 @@ def __init__(self, target, source, type='volume', read_only=False,
                 self['BindOptions'] = {
                     'Propagation': propagation
                 }
+            if recursive is not None:
+                bind_options = self.setdefault('BindOptions', {})
+                if recursive == "enabled":
+                    pass  # noop - default
+                elif recursive == "disabled":
+                    bind_options['NonRecursive'] = True
+                elif recursive == "writable":
+                    bind_options['ReadOnlyNonRecursive'] = True
+                elif recursive == "readonly":
+                    bind_options['ReadOnlyForceRecursive'] = True
+                else:
+                    raise errors.InvalidArgument(
+                        'Invalid recursive bind option, must be one of '
+                        '"enabled", "disabled", "writable", or "readonly".'
+                    )
             if any([labels, driver_config, no_copy, tmpfs_size, tmpfs_mode]):
                 raise errors.InvalidArgument(
                     'Incompatible options have been provided for the bind '
@@ -282,7 +300,7 @@ def __init__(self, target, source, type='volume', read_only=False,
                 volume_opts['DriverConfig'] = driver_config
             if volume_opts:
                 self['VolumeOptions'] = volume_opts
-            if any([propagation, tmpfs_size, tmpfs_mode]):
+            if any([propagation, recursive, tmpfs_size, tmpfs_mode]):
                 raise errors.InvalidArgument(
                     'Incompatible options have been provided for the volume '
                     'type mount.'
@@ -299,7 +317,7 @@ def __init__(self, target, source, type='volume', read_only=False,
                 tmpfs_opts['SizeBytes'] = parse_bytes(tmpfs_size)
             if tmpfs_opts:
                 self['TmpfsOptions'] = tmpfs_opts
-            if any([propagation, labels, driver_config, no_copy]):
+            if any([propagation, recursive, labels, driver_config, no_copy]):
                 raise errors.InvalidArgument(
                     'Incompatible options have been provided for the tmpfs '
                     'type mount.'

tests/integration/api_container_test.py

@@ -598,6 +598,60 @@ def test_create_with_mounts_ro(self):
         inspect_data = self.client.inspect_container(container)
         self.check_container_data(inspect_data, False)
 
+    @requires_api_version('1.41')
+    def test_create_with_mounts_recursive_disabled(self):
+        mount = docker.types.Mount(
+            type="bind", source=self.mount_origin, target=self.mount_dest,
+            read_only=True, recursive="disabled"
+        )
+        host_config = self.client.create_host_config(mounts=[mount])
+        container = self.run_container(
+            TEST_IMG, ['ls', self.mount_dest],
+            host_config=host_config
+        )
+        assert container
+        logs = self.client.logs(container).decode('utf-8')
+        assert self.filename in logs
+        inspect_data = self.client.inspect_container(container)
+        self.check_container_data(inspect_data, False,
+                                  bind_options_field="NonRecursive")
+
+    @requires_api_version('1.44')
+    def test_create_with_mounts_recursive_writable(self):
+        mount = docker.types.Mount(
+            type="bind", source=self.mount_origin, target=self.mount_dest,
+            read_only=True, recursive="writable"
+        )
+        host_config = self.client.create_host_config(mounts=[mount])
+        container = self.run_container(
+            TEST_IMG, ['ls', self.mount_dest],
+            host_config=host_config
+        )
+        assert container
+        logs = self.client.logs(container).decode('utf-8')
+        assert self.filename in logs
+        inspect_data = self.client.inspect_container(container)
+        self.check_container_data(inspect_data, False,
+                                  bind_options_field="ReadOnlyNonRecursive")
+
+    @requires_api_version('1.44')
+    def test_create_with_mounts_recursive_ro(self):
+        mount = docker.types.Mount(
+            type="bind", source=self.mount_origin, target=self.mount_dest,
+            read_only=True, recursive="readonly"
+        )
+        host_config = self.client.create_host_config(mounts=[mount])
+        container = self.run_container(
+            TEST_IMG, ['ls', self.mount_dest],
+            host_config=host_config
+        )
+        assert container
+        logs = self.client.logs(container).decode('utf-8')
+        assert self.filename in logs
+        inspect_data = self.client.inspect_container(container)
+        self.check_container_data(inspect_data, False,
+                                  bind_options_field="ReadOnlyForceRecursive")
+
     @requires_api_version('1.30')
     def test_create_with_volume_mount(self):
         mount = docker.types.Mount(
@@ -620,7 +674,8 @@ def test_create_with_volume_mount(self):
         assert mount['Source'] == mount_data['Name']
         assert mount_data['RW'] is True
 
-    def check_container_data(self, inspect_data, rw, propagation='rprivate'):
+    def check_container_data(self, inspect_data, rw, propagation='rprivate',
+                             bind_options_field=None):
         assert 'Mounts' in inspect_data
         filtered = list(filter(
             lambda x: x['Destination'] == self.mount_dest,
@@ -631,6 +686,18 @@ def check_container_data(self, inspect_data, rw, propagation='rprivate'):
         assert mount_data['Source'] == self.mount_origin
         assert mount_data['RW'] == rw
         assert mount_data['Propagation'] == propagation
+        if bind_options_field:
+            assert 'Mounts' in inspect_data['HostConfig']
+            mounts = [
+                x for x in inspect_data['HostConfig']['Mounts']
+                if x['Target'] == self.mount_dest
+            ]
+            assert len(mounts) == 1
+            mount = mounts[0]
+            assert 'BindOptions' in mount
+            bind_options = mount['BindOptions']
+            assert bind_options_field in bind_options
+            assert bind_options[bind_options_field] is True
 
     def run_with_volume(self, ro, *args, **kwargs):
         return self.run_container(