124 lines
4.1 KiB
Python
124 lines
4.1 KiB
Python
# Copyright 2015 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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from kubernetes import client, config, 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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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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DOMAIN = "armada"
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logging.setup(CONF, DOMAIN)
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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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config.load_kube_config()
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self.client = client.CoreV1Api()
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self.api_client = client.BatchV1Api()
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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.api_client.delete_namespaced_job(name=name,
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namespace=namespace,
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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 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",
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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 \
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.list_namespaced_pod(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 \
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.list_pod_for_all_namespaces(label_selector=label_selector)
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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 \
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.delete_namespaced_pod(name, namespace, body)
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def wait_for_pod_redeployment(self, old_pod_name, namespace):
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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(
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'Could not identify new pod after purging %s', 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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