314 lines
10 KiB
Python
314 lines
10 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright 2018 www.privaz.io Valletech AB
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#
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# Simplified BSD License (see licenses/simplified_bsd.txt or https://opensource.org/licenses/BSD-2-Clause)
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import time
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import ssl
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from os import environ
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from ansible.module_utils.six import string_types
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from ansible.module_utils.basic import AnsibleModule
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HAS_PYONE = True
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try:
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from pyone import OneException
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from pyone.server import OneServer
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except ImportError:
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OneException = Exception
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HAS_PYONE = False
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class OpenNebulaModule:
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"""
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Base class for all OpenNebula Ansible Modules.
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This is basically a wrapper of the common arguments, the pyone client and
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some utility methods.
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"""
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common_args = dict(
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api_url=dict(type='str', aliases=['api_endpoint'], default=environ.get("ONE_URL")),
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api_username=dict(type='str', default=environ.get("ONE_USERNAME")),
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api_password=dict(type='str', no_log=True, aliases=['api_token'], default=environ.get("ONE_PASSWORD")),
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validate_certs=dict(default=True, type='bool'),
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wait_timeout=dict(type='int', default=300),
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)
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def __init__(self, argument_spec, supports_check_mode=False, mutually_exclusive=None, required_one_of=None, required_if=None):
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module_args = OpenNebulaModule.common_args.copy()
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module_args.update(argument_spec)
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self.module = AnsibleModule(argument_spec=module_args,
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supports_check_mode=supports_check_mode,
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mutually_exclusive=mutually_exclusive,
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required_one_of=required_one_of,
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required_if=required_if)
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self.result = dict(changed=False,
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original_message='',
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message='')
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self.one = self.create_one_client()
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self.resolved_parameters = self.resolve_parameters()
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def create_one_client(self):
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"""
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Creates an XMLPRC client to OpenNebula.
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Returns: the new xmlrpc client.
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"""
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# context required for not validating SSL, old python versions won't validate anyway.
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if hasattr(ssl, '_create_unverified_context'):
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no_ssl_validation_context = ssl._create_unverified_context()
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else:
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no_ssl_validation_context = None
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# Check if the module can run
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if not HAS_PYONE:
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self.fail("pyone is required for this module")
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if self.module.params.get("api_url"):
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url = self.module.params.get("api_url")
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else:
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self.fail("Either api_url or the environment variable ONE_URL must be provided")
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if self.module.params.get("api_username"):
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username = self.module.params.get("api_username")
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else:
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self.fail("Either api_username or the environment vairable ONE_USERNAME must be provided")
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if self.module.params.get("api_password"):
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password = self.module.params.get("api_password")
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else:
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self.fail("Either api_password or the environment vairable ONE_PASSWORD must be provided")
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session = "%s:%s" % (username, password)
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if not self.module.params.get("validate_certs") and "PYTHONHTTPSVERIFY" not in environ:
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return OneServer(url, session=session, context=no_ssl_validation_context)
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else:
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return OneServer(url, session)
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def close_one_client(self):
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"""
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Close the pyone session.
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"""
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self.one.server_close()
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def fail(self, msg):
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"""
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Utility failure method, will ensure pyone is properly closed before failing.
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Args:
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msg: human readable failure reason.
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"""
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if hasattr(self, 'one'):
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self.close_one_client()
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self.module.fail_json(msg=msg)
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def exit(self):
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"""
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Utility exit method, will ensure pyone is properly closed before exiting.
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"""
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if hasattr(self, 'one'):
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self.close_one_client()
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self.module.exit_json(**self.result)
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def resolve_parameters(self):
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"""
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This method resolves parameters provided by a secondary ID to the primary ID.
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For example if cluster_name is present, cluster_id will be introduced by performing
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the required resolution
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Returns: a copy of the parameters that includes the resolved parameters.
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"""
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resolved_params = dict(self.module.params)
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if 'cluster_name' in self.module.params:
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clusters = self.one.clusterpool.info()
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for cluster in clusters.CLUSTER:
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if cluster.NAME == self.module.params.get('cluster_name'):
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resolved_params['cluster_id'] = cluster.ID
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return resolved_params
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def is_parameter(self, name):
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"""
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Utility method to check if a parameter was provided or is resolved
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Args:
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name: the parameter to check
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"""
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if name in self.resolved_parameters:
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return self.get_parameter(name) is not None
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else:
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return False
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def get_parameter(self, name):
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"""
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Utility method for accessing parameters that includes resolved ID
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parameters from provided Name parameters.
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"""
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return self.resolved_parameters.get(name)
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def get_host_by_name(self, name):
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'''
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Returns a host given its name.
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Args:
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name: the name of the host
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Returns: the host object or None if the host is absent.
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'''
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hosts = self.one.hostpool.info()
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for h in hosts.HOST:
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if h.NAME == name:
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return h
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return None
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def get_cluster_by_name(self, name):
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"""
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Returns a cluster given its name.
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Args:
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name: the name of the cluster
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Returns: the cluster object or None if the host is absent.
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"""
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clusters = self.one.clusterpool.info()
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for c in clusters.CLUSTER:
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if c.NAME == name:
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return c
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return None
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def get_template_by_name(self, name):
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'''
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Returns a template given its name.
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Args:
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name: the name of the template
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Returns: the template object or None if the host is absent.
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'''
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templates = self.one.templatepool.info()
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for t in templates.TEMPLATE:
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if t.NAME == name:
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return t
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return None
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def cast_template(self, template):
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"""
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OpenNebula handles all template elements as strings
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At some point there is a cast being performed on types provided by the user
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This function mimics that transformation so that required template updates are detected properly
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additionally an array will be converted to a comma separated list,
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which works for labels and hopefully for something more.
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Args:
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template: the template to transform
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Returns: the transformed template with data casts applied.
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"""
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# TODO: check formally available data types in templates
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# TODO: some arrays might be converted to space separated
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for key in template:
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value = template[key]
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if isinstance(value, dict):
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self.cast_template(template[key])
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elif isinstance(value, list):
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template[key] = ', '.join(value)
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elif not isinstance(value, string_types):
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template[key] = str(value)
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def requires_template_update(self, current, desired):
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"""
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This function will help decide if a template update is required or not
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If a desired key is missing from the current dictionary an update is required
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If the intersection of both dictionaries is not deep equal, an update is required
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Args:
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current: current template as a dictionary
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desired: desired template as a dictionary
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Returns: True if a template update is required
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"""
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if not desired:
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return False
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self.cast_template(desired)
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intersection = dict()
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for dkey in desired.keys():
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if dkey in current.keys():
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intersection[dkey] = current[dkey]
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else:
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return True
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return not (desired == intersection)
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def wait_for_state(self, element_name, state, state_name, target_states,
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invalid_states=None, transition_states=None,
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wait_timeout=None):
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"""
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Args:
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element_name: the name of the object we are waiting for: HOST, VM, etc.
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state: lambda that returns the current state, will be queried until target state is reached
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state_name: lambda that returns the readable form of a given state
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target_states: states expected to be reached
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invalid_states: if any of this states is reached, fail
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transition_states: when used, these are the valid states during the transition.
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wait_timeout: timeout period in seconds. Defaults to the provided parameter.
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"""
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if not wait_timeout:
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wait_timeout = self.module.params.get("wait_timeout")
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start_time = time.time()
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while (time.time() - start_time) < wait_timeout:
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current_state = state()
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if current_state in invalid_states:
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self.fail('invalid %s state %s' % (element_name, state_name(current_state)))
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if transition_states:
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if current_state not in transition_states:
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self.fail('invalid %s transition state %s' % (element_name, state_name(current_state)))
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if current_state in target_states:
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return True
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time.sleep(self.one.server_retry_interval())
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self.fail(msg="Wait timeout has expired!")
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def run_module(self):
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"""
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trigger the start of the execution of the module.
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Returns:
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"""
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try:
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self.run(self.one, self.module, self.result)
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except OneException as e:
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self.fail(msg="OpenNebula Exception: %s" % e)
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def run(self, one, module, result):
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"""
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to be implemented by subclass with the actual module actions.
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Args:
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one: the OpenNebula XMLRPC client
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module: the Ansible Module object
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result: the Ansible result
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"""
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raise NotImplementedError("Method requires implementation")
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