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"""
Health checks for OpenShift clusters.
"""
import os
from abc import ABCMeta, abstractmethod, abstractproperty
from importlib import import_module
import six
class OpenShiftCheckException(Exception):
"""Raised when a check cannot proceed."""
pass
@six.add_metaclass(ABCMeta)
class OpenShiftCheck(object):
"""A base class for defining checks for an OpenShift cluster environment."""
def __init__(self, module_executor):
self.module_executor = module_executor
@abstractproperty
def name(self):
"""The name of this check, usually derived from the class name."""
return "openshift_check"
@classmethod
def is_active(cls, task_vars): # pylint: disable=unused-argument
"""Returns true if this check applies to the ansible-playbook run."""
return True
@abstractmethod
def run(self, tmp, task_vars):
"""Executes a check, normally implemented as a module."""
return {}
@classmethod
def subclasses(cls):
"""Returns a generator of subclasses of this class and its subclasses."""
for subclass in cls.__subclasses__(): # pylint: disable=no-member
yield subclass
for subclass in subclass.subclasses():
yield subclass
# Dynamically import all submodules for the side effect of loading checks.
EXCLUDES = (
"__init__.py",
"mixins.py",
)
for name in os.listdir(os.path.dirname(__file__)):
if name.endswith(".py") and name not in EXCLUDES:
import_module(__package__ + "." + name[:-3])
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