123 lines
3.4 KiB
Python
123 lines
3.4 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import abc
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import six
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from os_faults.api import base_driver
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from os_faults.api.utils import public
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@six.add_metaclass(abc.ABCMeta)
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class Service(base_driver.BaseDriver):
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def __init__(self, service_name, config, node_cls, cloud_management,
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hosts=None):
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self.service_name = service_name
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self.config = config
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self.node_cls = node_cls
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self.cloud_management = cloud_management
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self.hosts = hosts
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@abc.abstractmethod
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def discover_nodes(self):
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"""Discover nodes where this Service is running
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:returns: NodesCollection
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"""
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def get_nodes(self):
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"""Get nodes where this Service is running
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:returns: NodesCollection
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"""
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if self.hosts is not None:
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nodes = self.cloud_management.get_nodes()
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hosts = [h for h in nodes.hosts if h.ip in self.hosts]
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return self.node_cls(cloud_management=self.cloud_management,
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hosts=hosts)
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return self.discover_nodes()
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@public
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def restart(self, nodes=None):
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"""Restart Service on all nodes or on particular subset
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:param nodes: NodesCollection
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"""
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raise NotImplementedError
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@public
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def terminate(self, nodes=None):
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"""Terminate Service gracefully on all nodes or on particular subset
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:param nodes: NodesCollection
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"""
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raise NotImplementedError
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@public
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def start(self, nodes=None):
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"""Start Service on all nodes or on particular subset
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:param nodes: NodesCollection
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"""
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raise NotImplementedError
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@public
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def kill(self, nodes=None):
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"""Terminate Service abruptly on all nodes or on particular subset
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:param nodes: NodesCollection
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"""
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raise NotImplementedError
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@public
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def unplug(self, nodes=None):
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"""Unplug Service out of network on all nodes or on particular subset
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:param nodes: NodesCollection
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"""
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raise NotImplementedError
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@public
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def plug(self, nodes=None):
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"""Plug Service into network on all nodes or on particular subset
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:param nodes: NodesCollection
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"""
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raise NotImplementedError
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@public
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def freeze(self, nodes=None, sec=None):
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"""Pause service execution
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Send SIGSTOP to Service into network on all nodes or on particular
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subset. If sec is defined - it mean Service will be stopped for
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a wile.
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:param nodes: NodesCollection
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:param sec: int
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"""
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raise NotImplementedError
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@public
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def unfreeze(self, nodes=None):
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"""Resume service execution
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Send SIGCONT to Service into network on all nodes or on particular
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subset.
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:param nodes: NodesCollection
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"""
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raise NotImplementedError
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