248 lines
8.1 KiB
Python
248 lines
8.1 KiB
Python
# Copyright 2017 The Armada Authors.
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#
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# 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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import grpc
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import logging
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from hapi.services.tiller_pb2 import ReleaseServiceStub, ListReleasesRequest, \
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InstallReleaseRequest, UpdateReleaseRequest, UninstallReleaseRequest
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from hapi.chart.config_pb2 import Config
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from k8s import K8s
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from ..utils.release import release_prefix
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TILLER_PORT = 44134
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TILLER_VERSION = b'2.1.3'
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TILLER_TIMEOUT = 300
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RELEASE_LIMIT = 64
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LOG = logging.getLogger(__name__)
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class Tiller(object):
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'''
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The Tiller class supports communication and requests to the Tiller Helm
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service over gRPC
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'''
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def __init__(self):
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# init k8s connectivity
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self.k8s = K8s()
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# init tiller channel
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self.channel = self.get_channel()
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# init timeout for all requests
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# and assume eventually this will
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# be fed at runtime as an override
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self.timeout = TILLER_TIMEOUT
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@property
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def metadata(self):
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'''
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Return tiller metadata for requests
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'''
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return [(b'x-helm-api-client', TILLER_VERSION)]
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def get_channel(self):
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'''
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Return a tiller channel
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'''
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tiller_ip = self._get_tiller_ip()
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tiller_port = self._get_tiller_port()
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return grpc.insecure_channel('%s:%s' % (tiller_ip, tiller_port))
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def _get_tiller_pod(self):
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'''
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Search all namespaces for a pod beginning with tiller-deploy*
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'''
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for i in self.k8s.get_namespace_pod('kube-system').items:
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# TODO(alanmeadows): this is a bit loose
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if i.metadata.name.startswith('tiller-deploy'):
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return i
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def _get_tiller_ip(self):
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'''
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Returns the tiller pod's IP address by searching all namespaces
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'''
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pod = self._get_tiller_pod()
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return pod.status.pod_ip
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def _get_tiller_port(self):
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'''Stub method to support arbitrary ports in the future'''
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return TILLER_PORT
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def tiller_status(self):
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'''
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return if tiller exist or not
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'''
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if self._get_tiller_ip():
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return True
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return False
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def list_releases(self):
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'''
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List Helm Releases
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'''
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releases = []
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stub = ReleaseServiceStub(self.channel)
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req = ListReleasesRequest(limit=RELEASE_LIMIT)
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release_list = stub.ListReleases(req, self.timeout,
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metadata=self.metadata)
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for y in release_list:
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releases.extend(y.releases)
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return releases
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def list_charts(self):
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'''
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List Helm Charts from Latest Releases
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Returns list of (name, version, chart, values)
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'''
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charts = []
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for latest_release in self.list_releases():
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try:
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charts.append((latest_release.name, latest_release.version,
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latest_release.chart,
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latest_release.config.raw))
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except IndexError:
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continue
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return charts
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def _pre_update_actions(self, actions, namespace):
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'''
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:params actions - array of items actions
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:params namespace - name of pod for actions
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'''
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try:
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for action in actions.get('delete', []):
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name = action.get("name")
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action_type = action.get("type")
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if "job" in action_type:
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LOG.info("Deleting %s in namespace: %s", name, namespace)
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self.k8s.delete_job_action(name, namespace)
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continue
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LOG.error("Unable to execute name: %s type: %s ", name, type)
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except Exception:
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LOG.debug("PRE: Could not delete anything, please check yaml")
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try:
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for action in actions.get('create', []):
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name = action.get("name")
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action_type = action.get("type")
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if "job" in action_type:
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LOG.info("Creating %s in namespace: %s", name, namespace)
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self.k8s.create_job_action(name, action_type)
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continue
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except Exception:
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LOG.debug("PRE: Could not create anything, please check yaml")
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def _post_update_actions(self, actions, namespace):
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try:
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for action in actions.get('create', []):
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name = action.get("name")
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action_type = action.get("type")
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if "job" in action_type:
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LOG.info("Creating %s in namespace: %s", name, namespace)
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self.k8s.create_job_action(name, action_type)
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continue
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except Exception:
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LOG.debug("POST: Could not create anything, please check yaml")
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def update_release(self, chart, dry_run, name, namespace, prefix,
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pre_actions=None, post_actions=None,
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disable_hooks=False, values=None):
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'''
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Update a Helm Release
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'''
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if values is None:
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values = Config(raw='')
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else:
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values = Config(raw=values)
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self._pre_update_actions(pre_actions, namespace)
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# build release install request
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stub = ReleaseServiceStub(self.channel)
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release_request = UpdateReleaseRequest(
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chart=chart,
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dry_run=dry_run,
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disable_hooks=disable_hooks,
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values=values,
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name="{}-{}".format(prefix, name))
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stub.UpdateRelease(release_request, self.timeout,
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metadata=self.metadata)
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self._post_update_actions(post_actions, namespace)
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def install_release(self, chart, dry_run, name, namespace, prefix,
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values=None):
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'''
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Create a Helm Release
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'''
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if values is None:
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values = Config(raw='')
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else:
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values = Config(raw=values)
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# build release install request
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stub = ReleaseServiceStub(self.channel)
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release_request = InstallReleaseRequest(
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chart=chart,
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dry_run=dry_run,
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values=values,
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name="{}-{}".format(prefix, name),
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namespace=namespace)
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return stub.InstallRelease(release_request,
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self.timeout,
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metadata=self.metadata)
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def uninstall_release(self, release, disable_hooks=False, purge=True):
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'''
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:params - release - helm chart release name
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:params - purge - deep delete of chart
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deletes a helm chart from tiller
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'''
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# build release install request
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stub = ReleaseServiceStub(self.channel)
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release_request = UninstallReleaseRequest(name=release,
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disable_hooks=disable_hooks,
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purge=purge)
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return stub.UninstallRelease(release_request,
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self.timeout,
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metadata=self.metadata)
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def chart_cleanup(self, prefix, charts):
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'''
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:params charts - list of yaml charts
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:params known_release - list of releases in tiller
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:result - will remove any chart that is not present in yaml
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'''
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valid_charts = [release_prefix(prefix, chart) for chart in charts]
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actual_charts = [x.name for x in self.list_releases()]
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chart_diff = list(set(actual_charts) - set(valid_charts))
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for chart in chart_diff:
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if chart.startswith(prefix):
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LOG.debug("Release: %s will be removed", chart)
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self.uninstall_release(chart)
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