306 lines
9.8 KiB
Python
306 lines
9.8 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. 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 datetime
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import json
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from libcloud.container.base import (Container, ContainerDriver,
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ContainerImage, ContainerCluster)
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from libcloud.common.kubernetes import KubernetesException
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from libcloud.common.kubernetes import KubernetesBasicAuthConnection
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from libcloud.common.kubernetes import KubernetesDriverMixin
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from libcloud.container.providers import Provider
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from libcloud.container.types import ContainerState
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__all__ = [
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'KubernetesContainerDriver'
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]
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ROOT_URL = '/api/'
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class KubernetesPod(object):
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def __init__(self, name, containers, namespace):
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"""
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A Kubernetes pod
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"""
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self.name = name
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self.containers = containers
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self.namespace = namespace
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class KubernetesContainerDriver(KubernetesDriverMixin, ContainerDriver):
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type = Provider.KUBERNETES
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name = 'Kubernetes'
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website = 'http://kubernetes.io'
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connectionCls = KubernetesBasicAuthConnection
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supports_clusters = True
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def list_containers(self, image=None, all=True):
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"""
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List the deployed container images
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:param image: Filter to containers with a certain image
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:type image: :class:`libcloud.container.base.ContainerImage`
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:param all: Show all container (including stopped ones)
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:type all: ``bool``
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:rtype: ``list`` of :class:`libcloud.container.base.Container`
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"""
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try:
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result = self.connection.request(
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ROOT_URL + "v1/pods").object
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except Exception as exc:
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errno = getattr(exc, 'errno', None)
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if errno == 111:
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raise KubernetesException(
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errno,
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'Make sure kube host is accessible'
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'and the API port is correct')
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raise
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pods = [self._to_pod(value) for value in result['items']]
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containers = []
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for pod in pods:
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containers.extend(pod.containers)
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return containers
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def get_container(self, id):
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"""
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Get a container by ID
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:param id: The ID of the container to get
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:type id: ``str``
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:rtype: :class:`libcloud.container.base.Container`
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"""
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containers = self.list_containers()
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match = [container for container in containers if container.id == id]
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return match[0]
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def list_clusters(self):
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"""
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Get a list of namespaces that pods can be deployed into
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:param location: The location to search in
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:type location: :class:`libcloud.container.base.ClusterLocation`
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:rtype: ``list`` of :class:`libcloud.container.base.ContainerCluster`
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"""
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try:
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result = self.connection.request(
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ROOT_URL + "v1/namespaces/").object
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except Exception as exc:
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errno = getattr(exc, 'errno', None)
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if errno == 111:
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raise KubernetesException(
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errno,
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'Make sure kube host is accessible'
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'and the API port is correct')
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raise
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clusters = [self._to_cluster(value) for value in result['items']]
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return clusters
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def get_cluster(self, id):
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"""
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Get a cluster by ID
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:param id: The ID of the cluster to get
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:type id: ``str``
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:rtype: :class:`libcloud.container.base.ContainerCluster`
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"""
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result = self.connection.request(ROOT_URL + "v1/namespaces/%s" %
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id).object
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return self._to_cluster(result)
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def destroy_cluster(self, cluster):
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"""
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Delete a cluster (namespace)
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:return: ``True`` if the destroy was successful, otherwise ``False``.
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:rtype: ``bool``
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"""
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self.connection.request(ROOT_URL + "v1/namespaces/%s" %
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cluster.id, method='DELETE').object
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return True
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def create_cluster(self, name, location=None):
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"""
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Create a container cluster (a namespace)
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:param name: The name of the cluster
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:type name: ``str``
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:param location: The location to create the cluster in
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:type location: :class:`.ClusterLocation`
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:rtype: :class:`.ContainerCluster`
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"""
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request = {
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'metadata': {
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'name': name
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}
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}
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result = self.connection.request(ROOT_URL + "v1/namespaces",
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method='POST',
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data=json.dumps(request)).object
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return self._to_cluster(result)
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def deploy_container(self, name, image, cluster=None,
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parameters=None, start=True):
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"""
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Deploy an installed container image.
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In kubernetes this deploys a single container Pod.
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https://cloud.google.com/container-engine/docs/pods/single-container
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:param name: The name of the new container
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:type name: ``str``
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:param image: The container image to deploy
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:type image: :class:`.ContainerImage`
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:param cluster: The cluster to deploy to, None is default
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:type cluster: :class:`.ContainerCluster`
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:param parameters: Container Image parameters
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:type parameters: ``str``
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:param start: Start the container on deployment
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:type start: ``bool``
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:rtype: :class:`.Container`
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"""
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if cluster is None:
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namespace = 'default'
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else:
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namespace = cluster.id
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request = {
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"metadata": {
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"name": name
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},
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"spec": {
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"containers": [
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{
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"name": name,
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"image": image.name
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}
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]
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}
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}
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result = self.connection.request(ROOT_URL + "v1/namespaces/%s/pods"
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% namespace,
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method='POST',
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data=json.dumps(request)).object
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return self._to_cluster(result)
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def destroy_container(self, container):
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"""
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Destroy a deployed container. Because the containers are single
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container pods, this will delete the pod.
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:param container: The container to destroy
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:type container: :class:`.Container`
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:rtype: ``bool``
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"""
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return self.ex_destroy_pod(container.extra['namespace'],
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container.extra['pod'])
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def ex_list_pods(self):
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"""
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List available Pods
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:rtype: ``list`` of :class:`.KubernetesPod`
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"""
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result = self.connection.request(ROOT_URL + "v1/pods").object
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return [self._to_pod(value) for value in result['items']]
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def ex_destroy_pod(self, namespace, pod_name):
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"""
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Delete a pod and the containers within it.
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"""
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self.connection.request(
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ROOT_URL + "v1/namespaces/%s/pods/%s" % (
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namespace, pod_name),
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method='DELETE').object
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return True
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def _to_pod(self, data):
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"""
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Convert an API response to a Pod object
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"""
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container_statuses = data['status']['containerStatuses']
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containers = []
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# response contains the status of the containers in a separate field
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for container in data['spec']['containers']:
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spec = list(filter(lambda i: i['name'] == container['name'],
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container_statuses))[0]
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containers.append(
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self._to_container(container, spec, data)
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)
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return KubernetesPod(
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name=data['metadata']['name'],
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namespace=data['metadata']['namespace'],
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containers=containers)
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def _to_container(self, data, container_status, pod_data):
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"""
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Convert container in Container instances
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"""
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return Container(
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id=container_status['containerID'],
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name=data['name'],
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image=ContainerImage(
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id=container_status['imageID'],
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name=data['image'],
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path=None,
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version=None,
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driver=self.connection.driver),
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ip_addresses=None,
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state=ContainerState.RUNNING,
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driver=self.connection.driver,
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extra={
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'pod': pod_data['metadata']['name'],
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'namespace': pod_data['metadata']['namespace']
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})
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def _to_cluster(self, data):
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"""
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Convert namespace to a cluster
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"""
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metadata = data['metadata']
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status = data['status']
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return ContainerCluster(
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id=metadata['name'],
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name=metadata['name'],
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driver=self.connection.driver,
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extra={'phase': status['phase']})
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def ts_to_str(timestamp):
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"""
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Return a timestamp as a nicely formated datetime string.
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"""
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date = datetime.datetime.fromtimestamp(timestamp)
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date_string = date.strftime("%d/%m/%Y %H:%M %Z")
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return date_string
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