278 lines
8.9 KiB
Python
278 lines
8.9 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 re
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import time
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from kubernetes import client
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from kubernetes import config
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from kubernetes import watch
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from kubernetes.client.rest import ApiException
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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 armada.utils.release import label_selectors
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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class K8s(object):
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'''
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Object to obtain the local kube config file
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'''
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def __init__(self):
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'''
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Initialize connection to Kubernetes
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'''
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try:
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config.load_incluster_config()
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except:
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config.load_kube_config()
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self.client = client.CoreV1Api()
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self.batch_api = client.BatchV1Api()
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self.extension_api = client.ExtensionsV1beta1Api()
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def delete_job_action(self, name, namespace="default"):
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'''
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:params name - name of the job
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:params namespace - name of pod that job
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'''
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try:
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body = client.V1DeleteOptions()
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self.batch_api.delete_namespaced_job(
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name=name, namespace=namespace, body=body)
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except ApiException as e:
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LOG.error("Exception when deleting a job: %s", e)
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def get_namespace_job(self, namespace="default", label_selector=''):
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'''
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:params lables - of the job
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:params namespace - name of jobs
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'''
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try:
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return self.batch_api.list_namespaced_job(
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namespace, label_selector=label_selector)
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except ApiException as e:
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LOG.error("Exception getting a job: %s", e)
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def create_job_action(self, name, namespace="default"):
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'''
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:params name - name of the job
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:params namespace - name of pod that job
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'''
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LOG.debug(" %s in namespace: %s", name, namespace)
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def get_namespace_pod(self, namespace="default", label_selector=''):
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'''
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:params namespace - namespace of the Pod
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:params label_selector - filters Pods by label
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This will return a list of objects req namespace
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'''
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return self.client.list_namespaced_pod(
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namespace, label_selector=label_selector)
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def get_all_pods(self, label_selector=''):
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'''
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:params label_selector - filters Pods by label
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Returns a list of pods from all namespaces
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'''
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return self.client.list_pod_for_all_namespaces(
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label_selector=label_selector)
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def get_namespace_daemonset(self, namespace='default', label=''):
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'''
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:param namespace - namespace of target deamonset
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:param labels - specify targeted daemonset
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'''
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return self.extension_api.list_namespaced_daemon_set(
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namespace, label_selector=label)
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def create_daemon_action(self, namespace, template):
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'''
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:param - namespace - pod namespace
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:param - template - deploy daemonset via yaml
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'''
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# we might need to load something here
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self.extension_api.create_namespaced_daemon_set(
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namespace, body=template)
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def delete_daemon_action(self, name, namespace="default", body=None):
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'''
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:params - namespace - pod namespace
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This will delete daemonset
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'''
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if body is None:
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body = client.V1DeleteOptions()
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return self.extension_api.delete_namespaced_daemon_set(
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name, namespace, body)
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def delete_namespace_pod(self, name, namespace="default", body=None):
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'''
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:params name - name of the Pod
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:params namespace - namespace of the Pod
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:params body - V1DeleteOptions
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Deletes pod by name and returns V1Status object
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'''
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if body is None:
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body = client.V1DeleteOptions()
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return self.client.delete_namespaced_pod(name, namespace, body)
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def wait_for_pod_redeployment(self, old_pod_name, namespace):
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'''
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:param old_pod_name - name of pods
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:param namespace - kubernetes namespace
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'''
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base_pod_pattern = re.compile('^(.+)-[a-zA-Z0-9]+$')
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if not base_pod_pattern.match(old_pod_name):
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LOG.error('Could not identify new pod after purging %s',
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old_pod_name)
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return
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pod_base_name = base_pod_pattern.match(old_pod_name).group(1)
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new_pod_name = ''
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w = watch.Watch()
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for event in w.stream(self.client.list_namespaced_pod, namespace):
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event_name = event['object'].metadata.name
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event_match = base_pod_pattern.match(event_name)
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if not event_match or not event_match.group(1) == pod_base_name:
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continue
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pod_conditions = event['object'].status.conditions
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# wait for new pod deployment
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if event['type'] == 'ADDED' and not pod_conditions:
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new_pod_name = event_name
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elif new_pod_name:
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for condition in pod_conditions:
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if (condition.type == 'Ready' and
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condition.status == 'True'):
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LOG.info('New pod %s deployed', new_pod_name)
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w.stop()
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def wait_get_completed_podphase(self, release, timeout=300):
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'''
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:param release - part of namespace
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:param timeout - time before disconnecting stream
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'''
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w = watch.Watch()
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for event in w.stream(self.client.list_pod_for_all_namespaces,
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timeout_seconds=timeout):
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pod_name = event['object'].metadata.name
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if release in pod_name:
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pod_state = event['object'].status.phase
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if pod_state == 'Succeeded':
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w.stop()
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break
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def wait_until_ready(self,
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release=None,
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namespace='default',
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labels='',
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timeout=300,
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sleep=15):
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'''
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:param release - part of namespace
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:param timeout - time before disconnecting stream
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'''
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LOG.debug("Wait on %s for %s sec", namespace, timeout)
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label_selector = ''
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if labels:
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label_selector = label_selectors(labels)
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valid_state = ['Succeeded', 'Running']
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wait_timeout = time.time() + 60 * timeout
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while True:
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self.is_pods_ready(label_selector=label_selector, timeout=timeout)
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pod_ready = []
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not_ready = []
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for pod in self.client.list_pod_for_all_namespaces(
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label_selector=label_selector).items:
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p_state = pod.status.phase
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p_name = pod.metadata.name
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if p_state in valid_state:
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pod_ready.append(True)
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continue
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pod_ready.append(False)
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not_ready.append(p_name)
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LOG.debug('%s', p_state)
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if time.time() > wait_timeout or all(pod_ready):
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LOG.debug("Pod States %s", pod_ready)
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break
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if time.time() > wait_timeout and not all(pod_ready):
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LOG.exception(
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'Failed to bring up release %s: %s', release, not_ready)
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break
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else:
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LOG.debug('time: %s pod %s', wait_timeout, pod_ready)
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def is_pods_ready(self, label_selector='', timeout=100):
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'''
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:params release_labels - list of labels to identify relevant pods
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:params namespace - namespace in which to search for pods
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Returns after waiting for all pods to enter Ready state
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'''
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pods_found = []
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valid_state = ['Succeeded', 'Running']
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w = watch.Watch()
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for pod in w.stream(self.client.list_pod_for_all_namespaces,
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label_selector=label_selector,
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timeout_seconds=timeout):
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pod_name = pod['object'].metadata.name
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pod_state = pod['object'].status.phase
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if pod['type'] == 'ADDED' and pod_state not in valid_state:
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LOG.debug("Pod %s in %s", pod_name, pod_state)
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pods_found.append(pod_name)
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elif pod_name in pods_found:
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if pod_state in valid_state:
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pods_found.remove(pod_name)
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LOG.debug(pods_found)
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if not pods_found:
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LOG.debug('Terminate wait')
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w.stop()
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