ansible/test/runner/lib/cloud/__init__.py

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"""Plugin system for cloud providers and environments for use in integration tests."""
from __future__ import absolute_import, print_function
import abc
import atexit
import os
import platform
import random
import re
import tempfile
from lib.util import (
ApplicationError,
display,
is_shippable,
import_plugins,
load_plugins,
)
from lib.test import (
TestConfig,
)
from lib.target import (
TestTarget,
)
PROVIDERS = {}
ENVIRONMENTS = {}
def initialize_cloud_plugins():
"""Import cloud plugins and load them into the plugin dictionaries."""
import_plugins('cloud')
load_plugins(CloudProvider, PROVIDERS)
load_plugins(CloudEnvironment, ENVIRONMENTS)
def get_cloud_platforms(args, targets=None):
"""
:type args: TestConfig
:type targets: tuple[IntegrationTarget] | None
:rtype: list[str]
"""
if targets is None:
cloud_platforms = set(args.metadata.cloud_config or [])
else:
cloud_platforms = set(get_cloud_platform(t) for t in targets)
cloud_platforms.discard(None)
return sorted(cloud_platforms)
def get_cloud_platform(target):
"""
:type target: IntegrationTarget
:rtype: str | None
"""
cloud_platforms = set(a.split('/')[1] for a in target.aliases if a.startswith('cloud/') and a.endswith('/') and a != 'cloud/')
if not cloud_platforms:
return None
if len(cloud_platforms) == 1:
cloud_platform = cloud_platforms.pop()
if cloud_platform not in PROVIDERS:
raise ApplicationError('Target %s aliases contains unknown cloud platform: %s' % (target.name, cloud_platform))
return cloud_platform
raise ApplicationError('Target %s aliases contains multiple cloud platforms: %s' % (target.name, ', '.join(sorted(cloud_platforms))))
def get_cloud_providers(args, targets=None):
"""
:type args: TestConfig
:type targets: tuple[IntegrationTarget] | None
:rtype: list[CloudProvider]
"""
return [PROVIDERS[p](args) for p in get_cloud_platforms(args, targets)]
def get_cloud_environment(args, target):
"""
:type args: TestConfig
:type target: IntegrationTarget
:rtype: CloudEnvironment
"""
cloud_platform = get_cloud_platform(target)
if not cloud_platform:
return None
return ENVIRONMENTS[cloud_platform](args)
def cloud_filter(args, targets):
"""
:type args: TestConfig
:type targets: tuple[IntegrationTarget]
:return: list[str]
"""
if args.metadata.cloud_config is not None:
return [] # cloud filter already performed prior to delegation
exclude = []
for provider in get_cloud_providers(args, targets):
provider.filter(targets, exclude)
return exclude
def cloud_init(args, targets):
"""
:type args: TestConfig
:type targets: tuple[IntegrationTarget]
"""
if args.metadata.cloud_config is not None:
return # cloud configuration already established prior to delegation
args.metadata.cloud_config = {}
for provider in get_cloud_providers(args, targets):
args.metadata.cloud_config[provider.platform] = {}
provider.setup()
class CloudBase(object):
"""Base class for cloud plugins."""
__metaclass__ = abc.ABCMeta
_CONFIG_PATH = 'config_path'
_RESOURCE_PREFIX = 'resource_prefix'
_MANAGED = 'managed'
def __init__(self, args):
"""
:type args: TestConfig
"""
self.args = args
self.platform = self.__module__.split('.')[2]
@property
def config_path(self):
"""
:rtype: str
"""
return os.path.join(os.getcwd(), self._get_cloud_config(self._CONFIG_PATH))
@config_path.setter
def config_path(self, value):
"""
:type value: str
"""
self._set_cloud_config(self._CONFIG_PATH, value)
@property
def resource_prefix(self):
"""
:rtype: str
"""
return self._get_cloud_config(self._RESOURCE_PREFIX)
@resource_prefix.setter
def resource_prefix(self, value):
"""
:type value: str
"""
self._set_cloud_config(self._RESOURCE_PREFIX, value)
@property
def managed(self):
"""
:rtype: bool
"""
return self._get_cloud_config(self._MANAGED)
@managed.setter
def managed(self, value):
"""
:type value: bool
"""
self._set_cloud_config(self._MANAGED, value)
def _get_cloud_config(self, key):
"""
:type key: str
:rtype: str | int | bool
"""
return self.args.metadata.cloud_config[self.platform][key]
def _set_cloud_config(self, key, value):
"""
:type key: str
:type value: str | int | bool
"""
self.args.metadata.cloud_config[self.platform][key] = value
class CloudProvider(CloudBase):
"""Base class for cloud provider plugins. Sets up cloud resources before delegation."""
__metaclass__ = abc.ABCMeta
TEST_DIR = 'test/integration'
def __init__(self, args, config_extension='.yml'):
"""
:type args: TestConfig
:type config_extension: str
"""
super(CloudProvider, self).__init__(args)
self.remove_config = False
self.config_static_path = '%s/cloud-config-%s%s' % (self.TEST_DIR, self.platform, config_extension)
self.config_template_path = '%s.template' % self.config_static_path
self.config_extension = config_extension
def filter(self, targets, exclude):
"""Filter out the cloud tests when the necessary config and resources are not available.
:type targets: tuple[TestTarget]
:type exclude: list[str]
"""
skip = 'cloud/%s/' % self.platform
skipped = [target.name for target in targets if skip in target.aliases]
if skipped:
exclude.append(skip)
display.warning('Excluding tests marked "%s" which require config (see "%s"): %s'
% (skip.rstrip('/'), self.config_template_path, ', '.join(skipped)))
def setup(self):
"""Setup the cloud resource before delegation and register a cleanup callback."""
self.resource_prefix = self._generate_resource_prefix()
atexit.register(self.cleanup)
# pylint: disable=locally-disabled, no-self-use
def get_remote_ssh_options(self):
"""Get any additional options needed when delegating tests to a remote instance via SSH.
:rtype: list[str]
"""
return []
# pylint: disable=locally-disabled, no-self-use
def get_docker_run_options(self):
"""Get any additional options needed when delegating tests to a docker container.
:rtype: list[str]
"""
return []
def cleanup(self):
"""Clean up the cloud resource and any temporary configuration files after tests complete."""
if self.remove_config:
os.remove(self.config_path)
def _use_static_config(self):
"""
:rtype: bool
"""
if os.path.isfile(self.config_static_path):
display.info('Using existing %s cloud config: %s' % (self.platform, self.config_static_path), verbosity=1)
self.config_path = self.config_static_path
static = True
else:
static = False
self.managed = not static
return static
def _write_config(self, content):
"""
:type content: str
"""
prefix = '%s-' % os.path.splitext(os.path.basename(self.config_static_path))[0]
with tempfile.NamedTemporaryFile(dir=self.TEST_DIR, prefix=prefix, suffix=self.config_extension, delete=False) as config_fd:
filename = os.path.join(self.TEST_DIR, os.path.basename(config_fd.name))
self.config_path = config_fd.name
self.remove_config = True
self._set_cloud_config('config_path', filename)
display.info('>>> Config: %s\n%s' % (filename, content.strip()), verbosity=3)
config_fd.write(content.encode('utf-8'))
config_fd.flush()
def _read_config_template(self):
"""
:rtype: str
"""
with open(self.config_template_path, 'r') as template_fd:
lines = template_fd.read().splitlines()
lines = [l for l in lines if not l.startswith('#')]
config = '\n'.join(lines).strip() + '\n'
return config
@staticmethod
def _populate_config_template(template, values):
"""
:type template: str
:type values: dict[str, str]
:rtype: str
"""
for key in sorted(values):
value = values[key]
template = template.replace('@%s' % key, value)
return template
@staticmethod
def _generate_resource_prefix():
"""
:rtype: str
"""
if is_shippable():
2017-05-05 11:16:50 +02:00
return 'shippable-%s-%s' % (
os.environ['SHIPPABLE_BUILD_NUMBER'],
os.environ['SHIPPABLE_JOB_NUMBER'],
)
node = re.sub(r'[^a-zA-Z0-9]+', '-', platform.node().split('.')[0])
return 'ansible-test-%s-%d' % (node, random.randint(10000000, 99999999))
class CloudEnvironment(CloudBase):
"""Base class for cloud environment plugins. Updates integration test environment after delegation."""
__metaclass__ = abc.ABCMeta
@abc.abstractmethod
def configure_environment(self, env, cmd):
"""
:type env: dict[str, str]
:type cmd: list[str]
"""
pass
def on_failure(self, target, tries):
"""
:type target: TestTarget
:type tries: int
"""
pass
@property
def inventory_hosts(self):
"""
:rtype: str | None
"""
return None