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authorLuke Meyer <lmeyer@redhat.com>2017-07-28 07:19:24 -0400
committerLuke Meyer <lmeyer@redhat.com>2017-08-01 12:18:37 -0400
commit4e6bf287d97aaa254aeb8cf1d83b2229fee7a19f (patch)
tree4d2292c3b533c47693e03072f89720002a998223 /roles
parentbf0bf407479458206f48885e43d3e1d3a2eab6e1 (diff)
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openshift_checks: enable variable conversion
Diffstat (limited to 'roles')
-rw-r--r--roles/openshift_health_checker/openshift_checks/__init__.py56
-rw-r--r--roles/openshift_health_checker/openshift_checks/logging/logging.py2
-rw-r--r--roles/openshift_health_checker/test/openshift_check_test.py22
3 files changed, 73 insertions, 7 deletions
diff --git a/roles/openshift_health_checker/openshift_checks/__init__.py b/roles/openshift_health_checker/openshift_checks/__init__.py
index 40a28cde5..cc8e3f406 100644
--- a/roles/openshift_health_checker/openshift_checks/__init__.py
+++ b/roles/openshift_health_checker/openshift_checks/__init__.py
@@ -10,6 +10,7 @@ from importlib import import_module
from ansible.module_utils import six
from ansible.module_utils.six.moves import reduce # pylint: disable=import-error,redefined-builtin
+from ansible.plugins.filter.core import to_bool as ansible_to_bool
class OpenShiftCheckException(Exception):
@@ -94,16 +95,59 @@ class OpenShiftCheck(object):
Ansible task_vars structures are Python dicts, often mapping strings to
other dicts. This helper makes it easier to get a nested value, raising
- OpenShiftCheckException when a key is not found or returning a default value
- provided as a keyword argument.
+ OpenShiftCheckException when a key is not found.
+
+ Keyword args:
+ default:
+ On missing key, return this as default value instead of raising exception.
+ convert:
+ Supply a function to apply to normalize the value before returning it.
+ None is the default (return as-is).
+ This function should raise ValueError if the user has provided a value
+ that cannot be converted, or OpenShiftCheckException if some other
+ problem needs to be described to the user.
"""
+ if len(keys) == 1:
+ keys = keys[0].split(".")
+
try:
value = reduce(operator.getitem, keys, self.task_vars)
except (KeyError, TypeError):
- if "default" in kwargs:
- return kwargs["default"]
- raise OpenShiftCheckException("'{}' is undefined".format(".".join(map(str, keys))))
- return value
+ if "default" not in kwargs:
+ raise OpenShiftCheckException(
+ "This check expects the '{}' inventory variable to be defined\n"
+ "in order to proceed, but it is undefined. There may be a bug\n"
+ "in Ansible, the checks, or their dependencies."
+ "".format(".".join(map(str, keys)))
+ )
+ value = kwargs["default"]
+
+ convert = kwargs.get("convert", None)
+ try:
+ if convert is None:
+ return value
+ elif convert is bool: # interpret bool as Ansible does, instead of python truthiness
+ return ansible_to_bool(value)
+ else:
+ return convert(value)
+
+ except ValueError as error: # user error in specifying value
+ raise OpenShiftCheckException(
+ 'Cannot convert inventory variable to expected type:\n'
+ ' "{var}={value}"\n'
+ '{error}'.format(var=".".join(keys), value=value, error=error)
+ )
+
+ except OpenShiftCheckException: # some other check-specific problem
+ raise
+
+ except Exception as error: # probably a bug in the function
+ raise OpenShiftCheckException(
+ 'There is a bug in this check. While trying to convert variable \n'
+ ' "{var}={value}"\n'
+ 'the given converter cannot be used or failed unexpectedly:\n'
+ '{error}'.format(var=".".join(keys), value=value, error=error)
+ )
LOADER_EXCLUDES = (
diff --git a/roles/openshift_health_checker/openshift_checks/logging/logging.py b/roles/openshift_health_checker/openshift_checks/logging/logging.py
index 43ba6c406..090aaf3c4 100644
--- a/roles/openshift_health_checker/openshift_checks/logging/logging.py
+++ b/roles/openshift_health_checker/openshift_checks/logging/logging.py
@@ -18,7 +18,7 @@ class LoggingCheck(OpenShiftCheck):
logging_namespace = "logging"
def is_active(self):
- logging_deployed = self.get_var("openshift_hosted_logging_deploy", default=False)
+ logging_deployed = self.get_var("openshift_hosted_logging_deploy", convert=bool, default=False)
return logging_deployed and super(LoggingCheck, self).is_active() and self.is_first_master()
def is_first_master(self):
diff --git a/roles/openshift_health_checker/test/openshift_check_test.py b/roles/openshift_health_checker/test/openshift_check_test.py
index 43aa875f4..789784c77 100644
--- a/roles/openshift_health_checker/test/openshift_check_test.py
+++ b/roles/openshift_health_checker/test/openshift_check_test.py
@@ -81,6 +81,7 @@ def dummy_check(task_vars):
@pytest.mark.parametrize("keys,expected", [
(("foo",), 42),
(("bar", "baz"), "openshift"),
+ (("bar.baz",), "openshift"),
])
def test_get_var_ok(task_vars, keys, expected):
assert dummy_check(task_vars).get_var(*keys) == expected
@@ -94,3 +95,24 @@ def test_get_var_error(task_vars, missing_keys):
def test_get_var_default(task_vars, missing_keys):
default = object()
assert dummy_check(task_vars).get_var(*missing_keys, default=default) == default
+
+
+@pytest.mark.parametrize("keys, convert, expected", [
+ (("foo",), str, "42"),
+ (("foo",), float, 42.0),
+ (("bar", "baz"), bool, False),
+])
+def test_get_var_convert(task_vars, keys, convert, expected):
+ assert dummy_check(task_vars).get_var(*keys, convert=convert) == expected
+
+
+@pytest.mark.parametrize("keys, convert", [
+ (("bar", "baz"), int),
+ (("bar.baz"), float),
+ (("foo"), "bogus"),
+ (("foo"), lambda a, b: 1),
+ (("foo"), lambda a: 1 / 0),
+])
+def test_get_var_convert_error(task_vars, keys, convert):
+ with pytest.raises(OpenShiftCheckException):
+ dummy_check(task_vars).get_var(*keys, convert=convert)