def simulate_cib(runner, cib):
"""
Run crm_simulate to get effects the cib would have on the live cluster
CommandRunner runner -- runner
etree cib -- cib tree to simulate
"""
cib_xml = etree_to_str(cib)
try:
plaintext_result, transitions_xml, new_cib_xml = simulate_cib_xml(
runner, cib_xml)
return (plaintext_result.strip(), xml_fromstring(transitions_xml),
xml_fromstring(new_cib_xml))
except (etree.XMLSyntaxError, etree.DocumentInvalid) as e:
raise LibraryError(reports.cib_simulate_error(str(e)))
def _get_api_result_dom(xml: str) -> _Element:
# raises etree.XMLSyntaxError and etree.DocumentInvalid
rng = settings.pacemaker_api_result_schema
dom = xml_fromstring(xml)
if os.path.isfile(rng):
etree.RelaxNG(file=rng).assertValid(dom)
return dom
def get_cluster_state_dom(xml):
try:
dom = xml_fromstring(xml)
if os.path.isfile(settings.crm_mon_schema):
etree.RelaxNG(file=settings.crm_mon_schema).assertValid(dom)
return dom
except (etree.XMLSyntaxError, etree.DocumentInvalid):
raise LibraryError(reports.cluster_state_invalid_format())
def get_cluster_state_dom(xml):
try:
dom = xml_fromstring(xml)
if os.path.isfile(settings.crm_mon_schema):
etree.RelaxNG(file=settings.crm_mon_schema).assertValid(dom)
return dom
except (etree.XMLSyntaxError, etree.DocumentInvalid):
raise LibraryError(reports.cluster_state_invalid_format())
def get_cluster_state_dom(xml):
try:
dom = xml_fromstring(xml)
_validate_cluster_state_dom(dom)
return dom
except (etree.XMLSyntaxError, etree.DocumentInvalid):
raise LibraryError(
ReportItem.error(reports.messages.BadClusterStateFormat())
)
def from_string(cls, config_string):
"""
Parse cluster.conf config and create a facade around it
config_string -- cluster.conf file content as string
"""
try:
return cls(xml_fromstring(config_string))
except (etree.XMLSyntaxError, etree.DocumentInvalid) as e:
raise LibraryError(reports.cluster_conf_invalid_format(str(e)))
def _parse_metadata(self, metadata):
try:
dom = xml_fromstring(metadata)
# TODO Majority of agents don't provide valid metadata, so we skip
# the validation for now. We want to enable it once the schema
# and/or agents are fixed.
# When enabling this check for overrides in child classes.
#if os.path.isfile(settings.agent_metadata_schema):
# etree.DTD(file=settings.agent_metadata_schema).assertValid(dom)
return dom
except (etree.XMLSyntaxError, etree.DocumentInvalid) as e:
raise UnableToGetAgentMetadata(self.get_name(), str(e))
def _parse_metadata(self, metadata):
try:
dom = xml_fromstring(metadata)
# TODO Majority of agents don't provide valid metadata, so we skip
# the validation for now. We want to enable it once the schema
# and/or agents are fixed.
# When enabling this check for overrides in child classes.
#if os.path.isfile(settings.agent_metadata_schema):
# etree.DTD(file=settings.agent_metadata_schema).assertValid(dom)
return dom
except (etree.XMLSyntaxError, etree.DocumentInvalid) as e:
raise UnableToGetAgentMetadata(self.get_name(), str(e))
def _metadata_xml_to_dom(metadata: str) -> _Element:
"""
Parse metadata string to XML document and validate against RNG schema
metadata -- metadata string to parse
"""
dom = xml_fromstring(metadata)
ocf_version = _get_ocf_version(dom)
if ocf_version == const.OCF_1_0:
etree.RelaxNG(file=settings.path.ocf_1_0_schema).assertValid(dom)
elif ocf_version == const.OCF_1_1:
etree.RelaxNG(file=settings.path.ocf_1_1_schema).assertValid(dom)
return dom
def is_fence_history_supported():
try:
crm_mon_rng = xml_fromstring(open(settings.crm_mon_schema, "r").read())
# Namespaces must be provided otherwise xpath won't match anything.
# 'None' namespace is not supported, so we rename it.
namespaces_map = {"ns": crm_mon_rng.nsmap.pop(None)}
history_elements = crm_mon_rng.xpath(
".//ns:element[@name='fence_history']", namespaces=namespaces_map)
if history_elements:
return True
except (EnvironmentError, etree.XMLSyntaxError):
# if we cannot tell for sure fence_history is supported, we will
# continue as if it was not supported
pass
return False
def is_fence_history_supported():
try:
crm_mon_rng = xml_fromstring(open(settings.crm_mon_schema, "r").read())
# Namespaces must be provided otherwise xpath won't match anything.
# 'None' namespace is not supported, so we rename it.
namespaces_map = {
"ns": crm_mon_rng.nsmap.pop(None)
}
history_elements = crm_mon_rng.xpath(
".//ns:element[@name='fence_history']",
namespaces=namespaces_map
)
if history_elements:
return True
except (EnvironmentError, etree.XMLSyntaxError):
# if we cannot tell for sure fence_history is supported, we will
# continue as if it was not supported
pass
return False
def get_capabilities_definition():
"""
Read and parse capabilities file
The point is to return all data in python structures for further processing.
"""
filename = os.path.join(settings.pcsd_exec_location, "capabilities.xml")
try:
with open(filename, mode="r") as file_:
capabilities_xml = xml_fromstring(file_.read())
except (EnvironmentError, etree.XMLSyntaxError, etree.DocumentInvalid) as e:
raise error(
"Cannot read capabilities definition file '{0}': '{1}'"
.format(filename, str(e))
)
capabilities = []
for feat_xml in capabilities_xml.findall(".//capability"):
feat = dict(feat_xml.attrib)
desc = feat_xml.find("./description")
# dedent and strip remove indentation in the XML file
feat["description"] = "" if desc is None else dedent(desc.text).strip()
capabilities.append(feat)
return capabilities
def get_capabilities_definition():
"""
Read and parse capabilities file
The point is to return all data in python structures for further processing.
"""
filename = os.path.join(settings.pcsd_exec_location, "capabilities.xml")
try:
with open(filename, mode="r") as file_:
capabilities_xml = xml_fromstring(file_.read())
except (EnvironmentError, etree.XMLSyntaxError,
etree.DocumentInvalid) as e:
raise error(
"Cannot read capabilities definition file '{0}': '{1}'".format(
filename, str(e))) from e
capabilities = []
for feat_xml in capabilities_xml.findall(".//capability"):
feat = dict(feat_xml.attrib)
desc = feat_xml.find("./description")
# dedent and strip remove indentation in the XML file
feat["description"] = "" if desc is None else dedent(desc.text).strip()
capabilities.append(feat)
return capabilities
def parse_cib_xml(xml):
return xml_fromstring(xml)
def parse_cib_xml(xml):
return xml_fromstring(xml)
def test_large_xml(self):
# pylint: disable=no-self-use
#it raises on a huge xml without the flag huge_tree=True
#see https://bugzilla.redhat.com/show_bug.cgi?id=1506864
xml_fromstring(large_xml)
def test_large_xml(self):
# pylint: disable=no-self-use
#it raises on a huge xml without the flag huge_tree=True
#see https://bugzilla.redhat.com/show_bug.cgi?id=1506864
xml_fromstring(large_xml)
