doctor_tests/stack.py

   1 ##############################################################################
   2 # Copyright (c) 2018 Nokia Corporation and others.
   3 #
   4 # All rights reserved. This program and the accompanying materials
   5 # are made available under the terms of the Apache License, Version 2.0
   6 # which accompanies this distribution, and is available at
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 ##############################################################################
   9 import os
  10 import time
  11
  12 from heatclient.common.template_utils import get_template_contents
  13 from heatclient import exc as heat_excecption
  14
  15 from doctor_tests.identity_auth import get_identity_auth
  16 from doctor_tests.identity_auth import get_session
  17 from doctor_tests.os_clients import heat_client
  18
  19
  20 class Stack(object):
  21
  22     def __init__(self, conf, log):
  23         self.conf = conf
  24         self.log = log
  25         auth = get_identity_auth(project=self.conf.doctor_project)
  26         self.heat = heat_client(self.conf.heat_version,
  27                                 get_session(auth=auth))
  28         self.stack_name = None
  29         self.stack_id = None
  30         self.template = None
  31         self.parameters = {}
  32         self.files = {}
  33
  34     # standard yaml.load will not work for hot tpl becasue of date format in
  35     # heat_template_version is not string
  36     def get_hot_tpl(self, template_file):
  37         if not os.path.isfile(template_file):
  38             raise Exception('File(%s) does not exist' % template_file)
  39         return get_template_contents(template_file=template_file)
  40
  41     def _wait_stack_action_complete(self, action):
  42         action_in_progress = '%s_IN_PROGRESS' % action
  43         action_complete = '%s_COMPLETE' % action
  44         action_failed = '%s_FAILED' % action
  45
  46         status = action_in_progress
  47         stack_retries = 160
  48         while status == action_in_progress and stack_retries > 0:
  49             time.sleep(2)
  50             try:
  51                 stack = self.heat.stacks.get(self.stack_name)
  52             except heat_excecption.HTTPNotFound:
  53                 if action == 'DELETE':
  54                     # Might happen you never get status as stack deleted
  55                     status = action_complete
  56                     break
  57                 else:
  58                     raise Exception('unable to get stack')
  59             status = stack.stack_status
  60             stack_retries = stack_retries - 1
  61         if stack_retries == 0 and status != action_complete:
  62             raise Exception("stack %s not completed within 5min, status:"
  63                             " %s" % (action, status))
  64         elif status == action_complete:
  65             self.log.info('stack %s %s' % (self.stack_name, status))
  66         elif status == action_failed:
  67             raise Exception("stack %s failed" % action)
  68         else:
  69             self.log.error('stack %s %s' % (self.stack_name, status))
  70             raise Exception("stack %s unknown result" % action)
  71
  72     def wait_stack_delete(self):
  73         self._wait_stack_action_complete('DELETE')
  74
  75     def wait_stack_create(self):
  76         self._wait_stack_action_complete('CREATE')
  77
  78     def wait_stack_update(self):
  79         self._wait_stack_action_complete('UPDATE')
  80
  81     def create(self, stack_name, template, parameters={}, files={}):
  82         self.stack_name = stack_name
  83         self.template = template
  84         self.parameters = parameters
  85         self.files = files
  86         stack = self.heat.stacks.create(stack_name=self.stack_name,
  87                                         files=files,
  88                                         template=template,
  89                                         parameters=parameters)
  90         self.stack_id = stack['stack']['id']
  91         try:
  92             self.wait_stack_create()
  93         except Exception:
  94             # It might not always work at first
  95             self.log.info('retry creating maintenance stack.......')
  96             self.delete()
  97             time.sleep(5)
  98             stack = self.heat.stacks.create(stack_name=self.stack_name,
  99                                             files=files,
 100                                             template=template,
 101                                             parameters=parameters)
 102             self.stack_id = stack['stack']['id']
 103             self.wait_stack_create()
 104
 105     def update(self, stack_name, stack_id, template, parameters={}, files={}):
 106         self.heat.stacks.update(stack_name=stack_name,
 107                                 stack_id=stack_id,
 108                                 files=files,
 109                                 template=template,
 110                                 parameters=parameters)
 111         self.wait_stack_update()
 112
 113     def delete(self):
 114         if self.stack_id is not None:
 115             self.heat.stacks.delete(self.stack_name)
 116             self.wait_stack_delete()
 117         else:
 118             self.log.info('no stack to delete')