1 | # Licensed to the StackStorm, Inc ('StackStorm') under one or more |
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There seems to be a cyclic import (st2common.models.api.base -> st2common.util.schema -> st2common.util.action_db -> st2common.persistence.action -> st2common.persistence.executionstate -> st2common.transport -> st2common.transport.reactor -> st2common.models.api.trace).
Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.
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There seems to be a cyclic import (st2common.models.api.base -> st2common.util.schema -> st2common.util.action_db -> st2common.persistence.action -> st2common.persistence.liveaction -> st2common.transport -> st2common.transport.reactor -> st2common.models.api.trace).
Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.
Loading history...
There seems to be a cyclic import (st2common.models.api.base -> st2common.util.schema -> st2common.util.action_db -> st2common.persistence.action -> st2common.persistence.runner -> st2common.persistence.base -> st2common.transport.reactor -> st2common.models.api.trace).
Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.
Loading history...
There seems to be a cyclic import (st2common.models.api.base -> st2common.util.schema -> st2common.util.action_db -> st2common.persistence.liveaction -> st2common.transport -> st2common.transport.reactor -> st2common.models.api.trace).
Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.
Loading history...
There seems to be a cyclic import (st2common.models.db.liveaction -> st2common.util.action_db -> st2common.persistence.action -> st2common.persistence.liveaction).
Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.
Loading history...
There seems to be a cyclic import (st2common.models.api.base -> st2common.util.schema -> st2common.util.action_db -> st2common.persistence.action -> st2common.persistence.actionalias -> st2common.persistence.base -> st2common.transport.reactor -> st2common.models.api.trace).
Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.
Loading history...
There seems to be a cyclic import (st2common.models.api.base -> st2common.util.schema -> st2common.util.action_db -> st2common.persistence.action -> st2common.persistence.execution -> st2common.transport -> st2common.transport.reactor -> st2common.models.api.trace).
Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.
Loading history...
There seems to be a cyclic import (st2common.models.api.base -> st2common.util.schema -> st2common.util.action_db -> st2common.persistence.action -> st2common.persistence.liveaction -> st2common.persistence.base -> st2common.transport.reactor -> st2common.models.api.trace).
Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.
Loading history...
There seems to be a cyclic import (st2common.models.api.base -> st2common.util.schema -> st2common.util.action_db -> st2common.persistence.action -> st2common.persistence.executionstate -> st2common.persistence.base -> st2common.transport.reactor -> st2common.models.api.trace).
Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.
Loading history...
|
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2 | # contributor license agreements. See the NOTICE file distributed with |
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3 | # this work for additional information regarding copyright ownership. |
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4 | # The ASF licenses this file to You under the Apache License, Version 2.0 |
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5 | # (the "License"); you may not use this file except in compliance with |
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6 | # the License. You may obtain a copy of the License at |
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7 | # |
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8 | # http://www.apache.org/licenses/LICENSE-2.0 |
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9 | # |
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10 | # Unless required by applicable law or agreed to in writing, software |
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11 | # distributed under the License is distributed on an "AS IS" BASIS, |
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12 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | # See the License for the specific language governing permissions and |
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14 | # limitations under the License. |
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15 | |||
16 | from __future__ import absolute_import |
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17 | |||
18 | import os |
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19 | import abc |
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20 | import shutil |
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21 | import tempfile |
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22 | from subprocess import list2cmdline |
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23 | |||
24 | import six |
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25 | import yaml |
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26 | from oslo_config import cfg |
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27 | from eventlet.green import subprocess |
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28 | |||
29 | from st2common import log as logging |
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30 | from st2common.constants import action as action_constants |
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31 | from st2common.constants import pack as pack_constants |
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32 | from st2common.content.utils import get_pack_directory |
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33 | from st2common.content.utils import get_pack_base_path |
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34 | from st2common.exceptions import actionrunner as exc |
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35 | from st2common.util.loader import register_runner |
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36 | from st2common.util.loader import register_callback_module |
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37 | from st2common.util.api import get_full_public_api_url |
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38 | from st2common.util.deprecation import deprecated |
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39 | from st2common.util.green.shell import run_command |
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40 | |||
41 | __all__ = [ |
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42 | 'ActionRunner', |
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43 | 'AsyncActionRunner', |
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44 | 'PollingAsyncActionRunner', |
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45 | 'GitWorktreeActionRunner', |
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46 | 'PollingAsyncActionRunner', |
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47 | 'ShellRunnerMixin', |
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48 | |||
49 | 'get_runner', |
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50 | 'get_metadata' |
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51 | ] |
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52 | |||
53 | |||
54 | LOG = logging.getLogger(__name__) |
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55 | |||
56 | # constants to lookup in runner_parameters |
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57 | RUNNER_COMMAND = 'cmd' |
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58 | RUNNER_CONTENT_VERSION = 'content_version' |
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59 | RUNNER_DEBUG = 'debug' |
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60 | |||
61 | |||
62 | def get_runner(package_name, module_name, config=None): |
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63 | """ |
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64 | Load the module and return an instance of the runner. |
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65 | """ |
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66 | |||
67 | if not package_name: |
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68 | # Backward compatibility for Pre 2.7.0 where package name always equaled module name |
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69 | package_name = module_name |
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70 | |||
71 | LOG.debug('Runner loading Python module: %s.%s', package_name, module_name) |
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72 | |||
73 | try: |
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74 | # TODO: Explore modifying this to support register_plugin |
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75 | module = register_runner(package_name=package_name, module_name=module_name) |
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76 | except Exception as e: |
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77 | msg = ('Failed to import runner module %s.%s' % (package_name, module_name)) |
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78 | LOG.exception(msg) |
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79 | |||
80 | raise exc.ActionRunnerCreateError('%s\n\n%s' % (msg, str(e))) |
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81 | |||
82 | LOG.debug('Instance of runner module: %s', module) |
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83 | |||
84 | if config: |
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85 | runner_kwargs = {'config': config} |
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86 | else: |
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87 | runner_kwargs = {} |
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88 | |||
89 | runner = module.get_runner(**runner_kwargs) |
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90 | LOG.debug('Instance of runner: %s', runner) |
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91 | return runner |
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92 | |||
93 | |||
94 | def get_metadata(package_name): |
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95 | """ |
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96 | Return runner related metadata for the provided runner package name. |
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97 | |||
98 | :rtype: ``list`` of ``dict`` |
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99 | """ |
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100 | import pkg_resources |
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101 | |||
102 | file_path = pkg_resources.resource_filename(package_name, 'runner.yaml') |
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103 | |||
104 | with open(file_path, 'r') as fp: |
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105 | content = fp.read() |
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106 | |||
107 | metadata = yaml.safe_load(content) |
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108 | return metadata |
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109 | |||
110 | |||
111 | @six.add_metaclass(abc.ABCMeta) |
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112 | class ActionRunner(object): |
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113 | """ |
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114 | The interface that must be implemented by each StackStorm |
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115 | Action Runner implementation. |
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116 | """ |
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117 | |||
118 | def __init__(self, runner_id): |
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119 | """ |
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120 | :param id: Runner id. |
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121 | :type id: ``str`` |
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122 | """ |
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123 | self.runner_id = runner_id |
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124 | self.runner_type = None |
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125 | self.runner_parameters = None |
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126 | self.action = None |
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127 | self.action_name = None |
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128 | self.liveaction = None |
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129 | self.liveaction_id = None |
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130 | self.execution = None |
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131 | self.execution_id = None |
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132 | self.entry_point = None |
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133 | self.libs_dir_path = None |
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134 | self.context = None |
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135 | self.callback = None |
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136 | self.auth_token = None |
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137 | self.rerun_ex_ref = None |
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138 | |||
139 | def pre_run(self): |
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140 | # Handle runner "enabled" attribute |
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141 | runner_enabled = getattr(self.runner_type, 'enabled', True) |
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142 | runner_name = getattr(self.runner_type, 'name', 'unknown') |
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143 | |||
144 | if not runner_enabled: |
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145 | msg = 'Runner "%s" has been disabled by the administrator.' % runner_name |
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146 | raise ValueError(msg) |
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147 | |||
148 | runner_parameters = getattr(self, 'runner_parameters', {}) or {} |
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149 | self._debug = runner_parameters.get(RUNNER_DEBUG, False) |
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150 | |||
151 | # Run will need to take an action argument |
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152 | # Run may need result data argument |
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153 | @abc.abstractmethod |
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154 | def run(self, action_parameters): |
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155 | raise NotImplementedError() |
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156 | |||
157 | def pause(self): |
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158 | runner_name = getattr(self.runner_type, 'name', 'unknown') |
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159 | raise NotImplementedError('Pause is not supported for runner %s.' % runner_name) |
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160 | |||
161 | def resume(self): |
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162 | runner_name = getattr(self.runner_type, 'name', 'unknown') |
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163 | raise NotImplementedError('Resume is not supported for runner %s.' % runner_name) |
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164 | |||
165 | def cancel(self): |
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166 | return ( |
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167 | action_constants.LIVEACTION_STATUS_CANCELED, |
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168 | self.liveaction.result, |
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169 | self.liveaction.context |
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170 | ) |
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171 | |||
172 | def post_run(self, status, result): |
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173 | if self.callback and isinstance(self.callback, dict) and 'source' in self.callback: |
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174 | callback_module = register_callback_module(self.callback['source']) |
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175 | callback_handler = callback_module.get_instance() |
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176 | callback_handler.callback(self.liveaction) |
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177 | |||
178 | @deprecated |
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179 | def get_pack_name(self): |
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180 | return self.get_pack_ref() |
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181 | |||
182 | def get_pack_ref(self): |
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183 | """ |
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184 | Retrieve pack name for the action which is being currently executed. |
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185 | |||
186 | :rtype: ``str`` |
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187 | """ |
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188 | if self.action: |
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189 | return self.action.pack |
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190 | |||
191 | return pack_constants.DEFAULT_PACK_NAME |
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192 | |||
193 | def get_user(self): |
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194 | """ |
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195 | Retrieve a name of the user which triggered this action execution. |
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196 | |||
197 | :rtype: ``str`` |
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198 | """ |
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199 | context = getattr(self, 'context', {}) or {} |
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200 | user = context.get('user', cfg.CONF.system_user.user) |
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201 | |||
202 | return user |
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203 | |||
204 | def _get_common_action_env_variables(self): |
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205 | """ |
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206 | Retrieve common ST2_ACTION_ environment variables which will be available to the action. |
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207 | |||
208 | Note: Environment variables are prefixed with ST2_ACTION_* so they don't clash with CLI |
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209 | environment variables. |
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210 | |||
211 | :rtype: ``dict`` |
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212 | """ |
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213 | result = {} |
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214 | result['ST2_ACTION_PACK_NAME'] = self.get_pack_ref() |
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215 | result['ST2_ACTION_EXECUTION_ID'] = str(self.execution_id) |
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216 | result['ST2_ACTION_API_URL'] = get_full_public_api_url() |
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217 | |||
218 | if self.auth_token: |
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219 | result['ST2_ACTION_AUTH_TOKEN'] = self.auth_token.token |
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220 | |||
221 | return result |
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222 | |||
223 | def __str__(self): |
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224 | attrs = ', '.join(['%s=%s' % (k, v) for k, v in six.iteritems(self.__dict__)]) |
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225 | return '%s@%s(%s)' % (self.__class__.__name__, str(id(self)), attrs) |
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226 | |||
227 | |||
228 | @six.add_metaclass(abc.ABCMeta) |
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229 | class AsyncActionRunner(ActionRunner): |
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230 | pass |
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231 | |||
232 | |||
233 | class PollingAsyncActionRunner(AsyncActionRunner): |
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234 | |||
235 | @classmethod |
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236 | def is_polling_enabled(cls): |
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237 | return True |
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238 | |||
239 | |||
240 | @six.add_metaclass(abc.ABCMeta) |
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241 | class GitWorktreeActionRunner(ActionRunner): |
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242 | """ |
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243 | Base class for runners which work with files (e.g. Python runner, Local script runner) |
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244 | and support git worktree functionality - ability to use a file under a specific git revision |
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245 | from a git repository. |
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246 | |||
247 | This revision is specified using "content_version" runner parameter. |
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248 | """ |
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249 | |||
250 | WORKTREE_DIRECTORY_PREFIX = 'st2-git-worktree-' |
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251 | |||
252 | def __init__(self, runner_id): |
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253 | super(GitWorktreeActionRunner, self).__init__(runner_id=runner_id) |
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254 | |||
255 | # Git work tree related attributes |
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256 | self.git_worktree_path = None |
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257 | self.git_worktree_revision = None |
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258 | |||
259 | def pre_run(self): |
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260 | super(GitWorktreeActionRunner, self).pre_run() |
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261 | |||
262 | # Handle git worktree creation |
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263 | self._content_version = self.runner_parameters.get(RUNNER_CONTENT_VERSION, None) |
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264 | |||
265 | if self._content_version: |
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266 | self.create_git_worktree(content_version=self._content_version) |
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267 | |||
268 | # Override entry_point so it points to git worktree directory |
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269 | pack_name = self.get_pack_name() |
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270 | entry_point = self._get_entry_point_for_worktree_path(pack_name=pack_name, |
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271 | entry_point=self.entry_point, |
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272 | worktree_path=self.git_worktree_path) |
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273 | |||
274 | assert(entry_point.startswith(self.git_worktree_path)) |
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275 | |||
276 | self.entry_point = entry_point |
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277 | |||
278 | def post_run(self, status, result): |
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279 | super(GitWorktreeActionRunner, self).post_run(status=status, result=result) |
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280 | |||
281 | # Remove git worktree directories (if used and available) |
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282 | if self.git_worktree_path and self.git_worktree_revision: |
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283 | pack_name = self.get_pack_name() |
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284 | self.cleanup_git_worktree(worktree_path=self.git_worktree_path, |
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285 | content_version=self.git_worktree_revision, |
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286 | pack_name=pack_name) |
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287 | |||
288 | def create_git_worktree(self, content_version): |
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289 | """ |
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290 | Create a git worktree for the provided git content version. |
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291 | |||
292 | :return: Path to the created git worktree directory. |
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293 | :rtype: ``str`` |
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294 | """ |
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295 | pack_name = self.get_pack_name() |
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296 | pack_directory = get_pack_directory(pack_name=pack_name) |
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297 | worktree_path = tempfile.mkdtemp(prefix=self.WORKTREE_DIRECTORY_PREFIX) |
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298 | |||
299 | # Set class variables |
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300 | self.git_worktree_revision = content_version |
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301 | self.git_worktree_path = worktree_path |
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302 | |||
303 | extra = { |
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304 | 'pack_name': pack_name, |
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305 | 'pack_directory': pack_directory, |
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306 | 'content_version': content_version, |
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307 | 'worktree_path': worktree_path |
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308 | } |
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309 | |||
310 | if not os.path.isdir(pack_directory): |
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311 | msg = ('Failed to create git worktree for pack "%s". Pack directory "%s" doesn\'t ' |
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312 | 'exist.' % (pack_name, pack_directory)) |
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313 | raise ValueError(msg) |
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314 | |||
315 | args = [ |
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316 | 'git', |
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317 | '-C', |
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318 | pack_directory, |
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319 | 'worktree', |
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320 | 'add', |
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321 | worktree_path, |
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322 | content_version |
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323 | ] |
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324 | cmd = list2cmdline(args) |
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325 | |||
326 | LOG.debug('Creating git worktree for pack "%s", content version "%s" and execution ' |
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327 | 'id "%s" in "%s"' % (pack_name, content_version, self.execution_id, |
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328 | worktree_path), extra=extra) |
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329 | LOG.debug('Command: %s' % (cmd)) |
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330 | exit_code, stdout, stderr, timed_out = run_command(cmd=cmd, |
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331 | cwd=pack_directory, |
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332 | stdout=subprocess.PIPE, |
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333 | stderr=subprocess.PIPE, |
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334 | shell=True) |
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335 | |||
336 | if exit_code != 0: |
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337 | self._handle_git_worktree_error(pack_name=pack_name, pack_directory=pack_directory, |
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338 | content_version=content_version, |
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339 | exit_code=exit_code, stdout=stdout, stderr=stderr) |
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340 | else: |
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341 | LOG.debug('Git worktree created in "%s"' % (worktree_path), extra=extra) |
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342 | |||
343 | # Make sure system / action runner user can access that directory |
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344 | args = [ |
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345 | 'chmod', |
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346 | '777', |
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347 | worktree_path |
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348 | ] |
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349 | cmd = list2cmdline(args) |
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350 | run_command(cmd=cmd, shell=True) |
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351 | |||
352 | return worktree_path |
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353 | |||
354 | def cleanup_git_worktree(self, worktree_path, pack_name, content_version): |
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355 | """ |
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356 | Remove / cleanup the provided git worktree directory. |
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357 | |||
358 | :rtype: ``bool`` |
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359 | """ |
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360 | # Safety check to make sure we don't remove something outside /tmp |
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361 | assert(worktree_path.startswith('/tmp')) |
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362 | assert(worktree_path.startswith('/tmp/%s' % (self.WORKTREE_DIRECTORY_PREFIX))) |
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363 | |||
364 | if self._debug: |
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365 | LOG.debug('Not removing git worktree "%s" because debug mode is enabled' % |
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366 | (worktree_path)) |
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367 | else: |
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368 | LOG.debug('Removing git worktree "%s" for pack "%s" and content version "%s"' % |
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369 | (worktree_path, pack_name, content_version)) |
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370 | |||
371 | try: |
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372 | shutil.rmtree(worktree_path, ignore_errors=True) |
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373 | except: |
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374 | pass |
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375 | |||
376 | return True |
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377 | |||
378 | def _handle_git_worktree_error(self, pack_name, pack_directory, content_version, exit_code, |
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379 | stdout, stderr): |
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380 | """ |
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381 | Handle "git worktree" related errors and throw a more user-friendly exception. |
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382 | """ |
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383 | error_prefix = 'Failed to create git worktree for pack "%s": ' % (pack_name) |
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384 | |||
385 | if isinstance(stdout, six.binary_type): |
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386 | stdout = stdout.decode('utf-8') |
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387 | |||
388 | if isinstance(stderr, six.binary_type): |
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389 | stderr = stderr.decode('utf-8') |
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390 | |||
391 | # 1. Installed version of git which doesn't support worktree command |
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392 | if "git: 'worktree' is not a git command." in stderr: |
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393 | msg = ('Installed git version doesn\'t support git worktree command. ' |
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394 | 'To be able to utilize this functionality you need to use git ' |
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395 | '>= 2.5.0.') |
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396 | raise ValueError(error_prefix + msg) |
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397 | |||
398 | # 2. Provided pack directory is not a git repository |
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399 | if "Not a git repository" in stderr: |
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400 | msg = ('Pack directory "%s" is not a git repository. To utilize this functionality, ' |
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401 | 'pack directory needs to be a git repository.' % (pack_directory)) |
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402 | raise ValueError(error_prefix + msg) |
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403 | |||
404 | # 3. Invalid revision provided |
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405 | if "invalid reference" in stderr: |
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406 | msg = ('Invalid content_version "%s" provided. Make sure that git repository is up ' |
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407 | 'to date and contains that revision.' % (content_version)) |
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408 | raise ValueError(error_prefix + msg) |
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409 | |||
410 | def _get_entry_point_for_worktree_path(self, pack_name, entry_point, worktree_path): |
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411 | """ |
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412 | Method which returns path to an action entry point which is located inside the git |
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413 | worktree directory. |
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414 | |||
415 | :rtype: ``str`` |
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416 | """ |
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417 | pack_base_path = get_pack_base_path(pack_name=pack_name) |
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418 | |||
419 | new_entry_point = entry_point.replace(pack_base_path, '') |
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420 | |||
421 | # Remove leading slash (if any) |
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422 | if new_entry_point.startswith('/'): |
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423 | new_entry_point = new_entry_point[1:] |
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424 | |||
425 | new_entry_point = os.path.join(worktree_path, new_entry_point) |
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426 | |||
427 | # Check to prevent directory traversal |
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428 | common_prefix = os.path.commonprefix([worktree_path, new_entry_point]) |
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429 | if common_prefix != worktree_path: |
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430 | raise ValueError('entry_point is not located inside the pack directory') |
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431 | |||
432 | return new_entry_point |
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433 | |||
434 | |||
435 | class ShellRunnerMixin(object): |
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436 | """ |
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437 | Class which contains utility functions to be used by shell runners. |
||
438 | """ |
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439 | |||
440 | def _transform_named_args(self, named_args): |
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441 | """ |
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442 | Transform named arguments to the final form. |
||
443 | |||
444 | :param named_args: Named arguments. |
||
445 | :type named_args: ``dict`` |
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446 | |||
447 | :rtype: ``dict`` |
||
448 | """ |
||
449 | if named_args: |
||
450 | return {self._kwarg_op + k: v for (k, v) in six.iteritems(named_args)} |
||
451 | return None |
||
452 | |||
453 | def _get_script_args(self, action_parameters): |
||
454 | """ |
||
455 | :param action_parameters: Action parameters. |
||
456 | :type action_parameters: ``dict`` |
||
457 | |||
458 | :return: (positional_args, named_args) |
||
459 | :rtype: (``str``, ``dict``) |
||
460 | """ |
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461 | # Lazy import to speed up import of this module |
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462 | from st2common.util import action_db as action_utils |
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463 | |||
464 | # TODO: return list for positional args, command classes should escape it |
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465 | # and convert it to string |
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466 | |||
467 | is_script_run_as_cmd = self.runner_parameters.get(RUNNER_COMMAND, None) |
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468 | |||
469 | pos_args = '' |
||
470 | named_args = {} |
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471 | |||
472 | if is_script_run_as_cmd: |
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473 | pos_args = self.runner_parameters.get(RUNNER_COMMAND, '') |
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474 | named_args = action_parameters |
||
475 | else: |
||
476 | pos_args, named_args = action_utils.get_args(action_parameters, self.action) |
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477 | |||
478 | return pos_args, named_args |
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479 |
Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.