274 lines
10 KiB
Python
274 lines
10 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 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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"""Magnum Kubernetes RPC handler."""
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from oslo_config import cfg
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from oslo_log import log as logging
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from magnum.common import clients
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from magnum.common import exception
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from magnum.common import k8s_manifest
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from magnum.common.pythonk8sclient.client import ApivbetaApi
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from magnum.common.pythonk8sclient.client import swagger
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from magnum.i18n import _
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from magnum import objects
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import ast
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from six.moves.urllib import error
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LOG = logging.getLogger(__name__)
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kubernetes_opts = [
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cfg.StrOpt('k8s_protocol',
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default='http',
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help=_('Default protocol of k8s master endpoint '
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'(http or https).')),
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cfg.IntOpt('k8s_port',
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default=8080,
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help=_('Default port of the k8s master endpoint.')),
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]
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cfg.CONF.register_opts(kubernetes_opts, group='kubernetes')
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def _retrieve_bay(context, obj):
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bay_uuid = obj.bay_uuid
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return objects.Bay.get_by_uuid(context, bay_uuid)
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def _retrieve_baymodel(context, obj):
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return objects.BayModel.get_by_uuid(context, obj.baymodel_id)
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def _retrieve_k8s_master_url(context, obj):
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apiserver_port = cfg.CONF.kubernetes.k8s_port
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if hasattr(obj, 'bay_uuid'):
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obj = _retrieve_bay(context, obj)
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baymodel = _retrieve_baymodel(context, obj)
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if baymodel.apiserver_port is not None:
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apiserver_port = baymodel.apiserver_port
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params = {
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'k8s_protocol': cfg.CONF.kubernetes.k8s_protocol,
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'k8s_port': apiserver_port,
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'api_address': obj.api_address
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}
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return "%(k8s_protocol)s://%(api_address)s:%(k8s_port)s" % params
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def _object_has_stack(context, obj):
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osc = clients.OpenStackClients(context)
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if hasattr(obj, 'bay_uuid'):
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obj = _retrieve_bay(context, obj)
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stack = osc.heat().stacks.get(obj.stack_id)
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if (stack.stack_status == 'DELETE_COMPLETE' or
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stack.stack_status == 'DELETE_IN_PROGRESS'):
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return False
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else:
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return True
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class Handler(object):
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"""These are the backend operations. They are executed by the backend
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service. API calls via AMQP (within the ReST API) trigger the
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handlers to be called.
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"""
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def __init__(self):
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super(Handler, self).__init__()
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self._k8s_api = None
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@property
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def k8s_api(self):
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return self._k8s_api
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@k8s_api.setter
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def k8s_api(self, k8s_master_url):
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"""Creates connection with Kubernetes master and
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creates ApivbetaApi instance to call Kubernetes
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APIs.
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:param k8s_master_url: Kubernetes master URL
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"""
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if self._k8s_api is None:
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# build a connection with Kubernetes master
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client = swagger.ApiClient(k8s_master_url)
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# create the ApivbetaApi class instance
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self._k8s_api = ApivbetaApi.ApivbetaApi(client)
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def service_create(self, context, service):
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LOG.debug("service_create")
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k8s_master_url = _retrieve_k8s_master_url(context, service)
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self.k8s_api = k8s_master_url
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manifest = k8s_manifest.parse(service.manifest)
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try:
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self.k8s_api.createService(body=manifest,
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namespaces='default')
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except error.HTTPError as err:
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message = ast.literal_eval(err.read())['message']
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raise exception.KubernetesAPIFailed(code=err.code, message=message)
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# call the service object to persist in db
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service.create(context)
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return service
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def service_update(self, context, service):
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LOG.debug("service_update %s", service.uuid)
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k8s_master_url = _retrieve_k8s_master_url(context, service)
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self.k8s_api = k8s_master_url
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manifest = k8s_manifest.parse(service.manifest)
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try:
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self.k8s_api.replaceService(name=service.name,
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body=manifest,
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namespaces='default')
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except error.HTTPError as err:
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message = ast.literal_eval(err.read())['message']
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raise exception.KubernetesAPIFailed(code=err.code, message=message)
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# call the service object to persist in db
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service.refresh(context)
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service.save()
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return service
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def service_delete(self, context, uuid):
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LOG.debug("service_delete %s", uuid)
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service = objects.Service.get_by_uuid(context, uuid)
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k8s_master_url = _retrieve_k8s_master_url(context, service)
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self.k8s_api = k8s_master_url
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if _object_has_stack(context, service):
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try:
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self.k8s_api.deleteService(name=service.name,
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namespaces='default')
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except error.HTTPError as err:
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if err.code == 404:
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pass
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else:
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message = ast.literal_eval(err.read())['message']
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raise exception.KubernetesAPIFailed(code=err.code,
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message=message)
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# call the service object to persist in db
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service.destroy(context)
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# Pod Operations
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def pod_create(self, context, pod):
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LOG.debug("pod_create")
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k8s_master_url = _retrieve_k8s_master_url(context, pod)
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self.k8s_api = k8s_master_url
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manifest = k8s_manifest.parse(pod.manifest)
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try:
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resp = self.k8s_api.createPod(body=manifest, namespaces='default')
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except error.HTTPError as err:
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pod.status = 'failed'
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if err.code != 409:
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pod.create(context)
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message = ast.literal_eval(err.read())['message']
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raise exception.KubernetesAPIFailed(code=err.code, message=message)
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pod.status = resp.status.phase
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# call the pod object to persist in db
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# TODO(yuanying): parse pod file and,
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# - extract pod name and set it
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# - extract pod labels and set it
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# When do we get pod labels and name?
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pod.create(context)
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return pod
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def pod_update(self, context, pod):
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LOG.debug("pod_update %s", pod.uuid)
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k8s_master_url = _retrieve_k8s_master_url(context, pod)
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self.k8s_api = k8s_master_url
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manifest = k8s_manifest.parse(pod.manifest)
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try:
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self.k8s_api.replacePod(name=pod.name, body=manifest,
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namespaces='default')
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except error.HTTPError as err:
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message = ast.literal_eval(err.read())['message']
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raise exception.KubernetesAPIFailed(code=err.code, message=message)
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# call the pod object to persist in db
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pod.refresh(context)
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pod.save()
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return pod
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def pod_delete(self, context, uuid):
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LOG.debug("pod_delete %s", uuid)
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pod = objects.Pod.get_by_uuid(context, uuid)
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k8s_master_url = _retrieve_k8s_master_url(context, pod)
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self.k8s_api = k8s_master_url
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if _object_has_stack(context, pod):
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try:
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self.k8s_api.deletePod(name=pod.name,
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namespaces='default')
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except error.HTTPError as err:
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if err.code == 404:
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pass
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else:
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message = ast.literal_eval(err.read())['message']
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raise exception.KubernetesAPIFailed(code=err.code,
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message=message)
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# call the pod object to persist in db
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pod.destroy(context)
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# Replication Controller Operations
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def rc_create(self, context, rc):
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LOG.debug("rc_create")
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k8s_master_url = _retrieve_k8s_master_url(context, rc)
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self.k8s_api = k8s_master_url
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manifest = k8s_manifest.parse(rc.manifest)
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try:
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self.k8s_api.createReplicationController(body=manifest,
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namespaces='default')
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except error.HTTPError as err:
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message = ast.literal_eval(err.read())['message']
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raise exception.KubernetesAPIFailed(code=err.code, message=message)
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# call the rc object to persist in db
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rc.create(context)
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return rc
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def rc_update(self, context, rc):
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LOG.debug("rc_update %s", rc.uuid)
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k8s_master_url = _retrieve_k8s_master_url(context, rc)
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self.k8s_api = k8s_master_url
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manifest = k8s_manifest.parse(rc.manifest)
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try:
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self.k8s_api.replaceReplicationController(name=rc.name,
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body=manifest,
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namespaces='default')
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except error.HTTPError as err:
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message = ast.literal_eval(err.read())['message']
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raise exception.KubernetesAPIFailed(code=err.code, message=message)
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# call the rc object to persist in db
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rc.refresh(context)
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rc.save()
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return rc
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def rc_delete(self, context, uuid):
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LOG.debug("rc_delete %s", uuid)
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rc = objects.ReplicationController.get_by_uuid(context, uuid)
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k8s_master_url = _retrieve_k8s_master_url(context, rc)
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self.k8s_api = k8s_master_url
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if _object_has_stack(context, rc):
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try:
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self.k8s_api.deleteReplicationController(name=rc.name,
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namespaces='default')
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except error.HTTPError as err:
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if err.code == 404:
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pass
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else:
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message = ast.literal_eval(err.read())['message']
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raise exception.KubernetesAPIFailed(code=err.code,
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message=message)
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# call the rc object to persist in db
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rc.destroy(context)
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