def _validate_move_ban_clear_analyzer(resource_element):
resource_is_bundle = False
resource_is_clone = False
resource_is_in_clone = False
resource_is_promotable_clone = False
resource_is_in_promotable_clone = False
promotable_clone_element = None
if is_bundle(resource_element):
resource_is_bundle = True
elif is_any_clone(resource_element):
resource_is_clone = True
if is_master(resource_element) or is_promotable_clone(resource_element):
resource_is_promotable_clone = True
promotable_clone_element = resource_element
elif get_parent_any_clone(resource_element) is not None:
parent_clone = get_parent_any_clone(resource_element)
resource_is_in_clone = True
if is_master(parent_clone) or is_promotable_clone(parent_clone):
resource_is_in_promotable_clone = True
promotable_clone_element = parent_clone
return _MoveBanClearAnalysis(
resource_is_bundle,
resource_is_clone,
resource_is_in_clone,
resource_is_promotable_clone,
resource_is_in_promotable_clone,
(
promotable_clone_element.get("id")
if promotable_clone_element is not None
else None
)
)
def find_resources_to_delete(resource_el: _Element) -> List[_Element]:
"""
Get resources to delete, children and parents of the given resource if
necessary.
If element is a primitive which is in a clone and you specify one of them,
you will get elements for both of them. If you specify group element which
is in a clone then will you get clone, group, and all primitive elements in
a group and etc.
resource_el - resource element (bundle, clone, group, primitive)
"""
result = [resource_el]
# childrens of bundle, clone, group, clone-with-group
inner_resource_list = get_inner_resources(resource_el)
if inner_resource_list:
result.extend(inner_resource_list)
inner_resource = inner_resource_list[0]
if is_group(inner_resource):
result.extend(get_inner_resources(inner_resource))
# parents of primitive if needed (group, clone)
parent_el = get_parent_resource(resource_el)
if parent_el is None or is_bundle(parent_el):
return result
if is_any_clone(parent_el):
result.insert(0, parent_el)
if is_group(parent_el):
group_inner_resources = get_group_inner_resources(parent_el)
if len(group_inner_resources) <= 1:
result = [parent_el] + group_inner_resources
clone_el = get_parent_resource(parent_el)
if clone_el is not None:
result.insert(0, clone_el)
return result
def find_resources_to_enable(resource_el):
"""
Get resources to enable in order to enable specified resource succesfully
etree resource_el -- resource element
"""
if is_bundle(resource_el):
# bundles currently cannot be disabled - pcmk does not support that
# inner resources are supposed to be managed separately
return []
if is_any_clone(resource_el):
return [resource_el, get_clone_inner_resource(resource_el)]
to_enable = [resource_el]
parent = resource_el.getparent()
if is_any_clone(parent):
to_enable.append(parent)
return to_enable
def is_wrapper_resource(resource_el: Element) -> bool:
"""
Return True for resource_el of types that can contain other resource(s)
(these are: group, bundle, clone) and False otherwise.
resource_el -- resource element to check
"""
return (is_group(resource_el) or is_bundle(resource_el)
or is_any_clone(resource_el))
def move_resources_to_group(
group_element, primitives_to_place, adjacent_resource=None,
put_after_adjacent=True
):
"""
Put resources into a group or move them within their group
etree.Element group_element -- the group to put resources into
iterable primitives_to_place -- resource elements to put into the group
etree.Element adjacent_resource -- put resources beside this one if set
bool put_after_adjacent -- put resources after or before the adjacent one
"""
for resource in primitives_to_place:
old_parent = resource.getparent()
# Move a resource to the group.
if (
adjacent_resource is not None
and
adjacent_resource.getnext() is not None
and
put_after_adjacent
):
adjacent_resource.getnext().addprevious(resource)
adjacent_resource = resource
elif (
adjacent_resource is not None
and
not put_after_adjacent
):
adjacent_resource.addprevious(resource)
else:
group_element.append(resource)
adjacent_resource = resource
# If the resource was the last resource in another group, that group is
# now empty and must be deleted. If the group is in a clone element,
# delete that as well.
if (
old_parent is not None
and
group.is_group(old_parent)
and
not group.get_inner_resources(old_parent)
and
old_parent.getparent() is not None
):
old_grandparent = old_parent.getparent()
if (
clone.is_any_clone(old_grandparent)
and
old_grandparent.getparent() is not None
):
old_grandparent.getparent().remove(old_grandparent)
else:
old_grandparent.remove(old_parent)
def find_resources_to_enable(resource_el):
"""
Get resources to enable in order to enable specified resource succesfully
etree resource_el -- resource element
"""
if is_bundle(resource_el):
to_enable = [resource_el]
in_bundle = get_bundle_inner_resource(resource_el)
if in_bundle is not None:
to_enable.append(in_bundle)
return to_enable
if is_any_clone(resource_el):
return [resource_el, get_clone_inner_resource(resource_el)]
to_enable = [resource_el]
parent = resource_el.getparent()
if is_any_clone(parent) or is_bundle(parent):
to_enable.append(parent)
return to_enable
def find_resources_to_unmanage(resource_el):
"""
Get resources to unmanage to unmanage the specified resource succesfully
etree resource_el -- resource element
"""
# resource hierarchy - specified resource - what to return
# a primitive - the primitive - the primitive
#
# a cloned primitive - the primitive - the primitive
# a cloned primitive - the clone - the primitive
# The resource will run on all nodes after unclone. However that doesn't
# seem to be bad behavior. Moreover, if monitor operations were disabled,
# they wouldn't enable on unclone, but the resource would become managed,
# which is definitely bad.
#
# a primitive in a group - the primitive - the primitive
# Otherwise all primitives in the group would become unmanaged.
# a primitive in a group - the group - all primitives in the group
# If only the group was set to unmanaged, setting any primitive in the
# group to managed would set all the primitives in the group to managed.
# If the group as well as all its primitives were set to unmanaged, any
# primitive added to the group would become unmanaged. This new primitive
# would become managed if any original group primitive becomes managed.
# Therefore changing one primitive influences another one, which we do
# not want to happen.
#
# a primitive in a cloned group - the primitive - the primitive
# a primitive in a cloned group - the group - all primitives in the group
# See group notes above
# a primitive in a cloned group - the clone - all primitives in the group
# See clone notes above
#
# a bundled primitive - the primitive - the primitive
# a bundled primitive - the bundle - the bundle and the primitive
# We need to unmanage implicit resources create by pacemaker and there is
# no other way to do it than unmanage the bundle itself.
# Since it is not possible to unbundle a resource, the concers described
# at unclone don't apply here. However to prevent future bugs, in case
# unbundling becomes possible, we unmanage the primitive as well.
# an empty bundle - the bundle - the bundle
# There is nothing else to unmanage.
if is_bundle(resource_el):
in_bundle = get_bundle_inner_resource(resource_el)
return (
[resource_el, in_bundle] if in_bundle is not None else [resource_el]
)
if is_any_clone(resource_el):
resource_el = get_clone_inner_resource(resource_el)
if is_group(resource_el):
return get_group_inner_resources(resource_el)
if is_primitive(resource_el):
return [resource_el]
return []
def move_resources_to_group(
group_element: _Element,
primitives_to_place: Iterable[_Element],
adjacent_resource: Optional[_Element] = None,
put_after_adjacent: bool = True,
) -> None:
"""
Put resources into a group or move them within their group
There is a corner case which is not covered in this function. If the CIB
contains references to a group or clone which this function deletes,
they are not deleted and an invalid CIB is generated. These references
can be constraints, fencing levels etc. - anything that contains group id of
the deleted group. It is on the caller to detect this corner case and handle
it appropriately (see group_add in lib/commands/resource.py). For future
rewrites of this function, it would be better to ask for --force before
deleting anything that user didn't explicitly ask for - like deleting the
clone and its associated constraints.
etree.Element group_element -- the group to put resources into
iterable primitives_to_place -- resource elements to put into the group
etree.Element adjacent_resource -- put resources beside this one if set
bool put_after_adjacent -- put resources after or before the adjacent one
"""
for resource in primitives_to_place:
old_parent = resource.getparent()
# Move a resource to the group.
if (adjacent_resource is not None
and adjacent_resource.getnext() is not None
and put_after_adjacent):
adjacent_resource.getnext().addprevious(resource) # type: ignore
adjacent_resource = resource
elif adjacent_resource is not None and not put_after_adjacent:
adjacent_resource.addprevious(resource)
else:
group_element.append(resource)
adjacent_resource = resource
# If the resource was the last resource in another group, that group is
# now empty and must be deleted. If the group is in a clone element,
# delete that as well.
if (old_parent is not None and group.is_group(
old_parent) # do not delete resources element
and not group.get_inner_resources(old_parent)):
old_grandparent = old_parent.getparent()
if old_grandparent is not None:
old_great_grandparent = old_grandparent.getparent()
if (clone.is_any_clone(old_grandparent)
and old_great_grandparent is not None):
old_great_grandparent.remove(old_grandparent)
else:
old_grandparent.remove(old_parent)
def find_primitives(resource_el):
"""
Get list of primitives contained in a given resource
etree resource_el -- resource element
"""
if is_bundle(resource_el):
in_bundle = get_bundle_inner_resource(resource_el)
return [in_bundle] if in_bundle is not None else []
if is_any_clone(resource_el):
resource_el = get_clone_inner_resource(resource_el)
if is_group(resource_el):
return get_group_inner_resources(resource_el)
if is_primitive(resource_el):
return [resource_el]
return []
def get_inner_resources(resource_el: _Element) -> List[_Element]:
"""
Return list of inner resources (direct descendants) of a resource
specified as resource_el.
Example: for clone containing a group, this function will return only
group and not resource inside the group
resource_el -- resource element to get its inner resources
"""
if is_bundle(resource_el):
in_bundle = get_bundle_inner_resource(resource_el)
return [in_bundle] if in_bundle is not None else []
if is_any_clone(resource_el):
return [get_clone_inner_resource(resource_el)]
if is_group(resource_el):
return get_group_inner_resources(resource_el)
return []
def find_resources_to_unmanage(resource_el):
"""
Get resources to unmanage to unmanage the specified resource succesfully
etree resource_el -- resource element
"""
# resource hierarchy - specified resource - what to return
# a primitive - the primitive - the primitive
#
# a cloned primitive - the primitive - the primitive
# a cloned primitive - the clone - the primitive
# The resource will run on all nodes after unclone. However that doesn't
# seem to be bad behavior. Moreover, if monitor operations were disabled,
# they wouldn't enable on unclone, but the resource would become managed,
# which is definitely bad.
#
# a primitive in a group - the primitive - the primitive
# Otherwise all primitives in the group would become unmanaged.
# a primitive in a group - the group - all primitives in the group
# If only the group was set to unmanaged, setting any primitive in the
# group to managed would set all the primitives in the group to managed.
# If the group as well as all its primitives were set to unmanaged, any
# primitive added to the group would become unmanaged. This new primitive
# would become managed if any original group primitive becomes managed.
# Therefore changing one primitive influences another one, which we do
# not want to happen.
#
# a primitive in a cloned group - the primitive - the primitive
# a primitive in a cloned group - the group - all primitives in the group
# See group notes above
# a primitive in a cloned group - the clone - all primitives in the group
# See clone notes above
#
# a bundled primitive - the primitive - the primitive
# a bundled primitive - the bundle - nothing
# bundles currently cannot be set as unmanaged - pcmk does not support that
# an empty bundle - the bundle - nothing
# bundles currently cannot be set as unmanaged - pcmk does not support that
if is_any_clone(resource_el):
resource_el = get_clone_inner_resource(resource_el)
if is_group(resource_el):
return get_group_inner_resources(resource_el)
if is_primitive(resource_el):
return [resource_el]
return []
def move_resources_to_group(
group_element,
primitives_to_place,
adjacent_resource=None,
put_after_adjacent=True,
):
"""
Put resources into a group or move them within their group
etree.Element group_element -- the group to put resources into
iterable primitives_to_place -- resource elements to put into the group
etree.Element adjacent_resource -- put resources beside this one if set
bool put_after_adjacent -- put resources after or before the adjacent one
"""
for resource in primitives_to_place:
old_parent = resource.getparent()
# Move a resource to the group.
if (adjacent_resource is not None
and adjacent_resource.getnext() is not None
and put_after_adjacent):
adjacent_resource.getnext().addprevious(resource)
adjacent_resource = resource
elif adjacent_resource is not None and not put_after_adjacent:
adjacent_resource.addprevious(resource)
else:
group_element.append(resource)
adjacent_resource = resource
# If the resource was the last resource in another group, that group is
# now empty and must be deleted. If the group is in a clone element,
# delete that as well.
if (old_parent is not None and group.is_group(old_parent)
and not group.get_inner_resources(old_parent)
and old_parent.getparent() is not None):
old_grandparent = old_parent.getparent()
if (clone.is_any_clone(old_grandparent)
and old_grandparent.getparent() is not None):
old_grandparent.getparent().remove(old_grandparent)
else:
old_grandparent.remove(old_parent)
def test_is_any_clone(self):
self.assertTrue(clone.is_any_clone(etree.fromstring("<clone/>")))
self.assertTrue(clone.is_any_clone(etree.fromstring("<master/>")))
self.assertFalse(clone.is_any_clone(etree.fromstring("<group/>")))
def test_is_any_clone(self):
self.assertTrue(clone.is_any_clone(etree.fromstring("<clone/>")))
self.assertTrue(clone.is_any_clone(etree.fromstring("<master/>")))
self.assertFalse(clone.is_any_clone(etree.fromstring("<group/>")))