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# Copyright 2015 Open Platform for NFV Project, Inc. and its contributors
# This software is distributed under the terms and conditions of the 'Apache-2.0'
# license which can be found in the file 'LICENSE' in this package distribution
# or at 'http://www.apache.org/licenses/LICENSE-2.0'.
from kubernetes import client, config
import logging
import urllib3.exceptions
from python_moonutilities import configuration
logger = logging.getLogger("moon.orchestrator.drivers")
def get_driver():
try:
return K8S()
except urllib3.exceptions.MaxRetryError as e:
logger.exception(e)
return Docker()
class Driver:
def __init__(self):
self.cache = {}
# example of cache:
# {
# "uuid_of_pod": {
# "ip": "",
# "hostname": "",
# "port": 30001,
# "pdp": "",
# "keystone_project_id": "",
# "plugin_name": "",
# "namespace": ""
# }
# }
def get_pods(self, namespace=None):
raise NotImplementedError
def load_pod(self, data, api_client=None, ext_client=None):
raise NotImplementedError
def delete_pod(self, uuid=None, name=None):
raise NotImplementedError
def get_slaves(self):
raise NotImplementedError
class K8S(Driver):
def __init__(self):
super(K8S, self).__init__()
config.load_kube_config()
self.client = client.CoreV1Api()
def get_pods(self, name=None):
if name:
pods = self.client.list_pod_for_all_namespaces(watch=False)
for pod in pods.items:
logger.debug("get_pods {}".format(pod.metadata.name))
if name in pod.metadata.name:
return pod
else:
return None
logger.debug("get_pods cache={}".format(self.cache))
return self.cache
@staticmethod
def __create_pod(client, data):
pod_manifest = {
'apiVersion': 'extensions/v1beta1',
'kind': 'Deployment',
'metadata': {
'name': data[0].get('name')
},
'spec': {
'replicas': 1,
'template': {
'metadata': {'labels': {'app': data[0].get('name')}},
'hostname': data[0].get('name'),
'spec': {
'containers': []
}
},
}
}
for _data in data:
pod_manifest['spec']['template']['spec']['containers'].append(
{
'image': _data.get('container', "busybox"),
'name': _data.get('name'),
'hostname': _data.get('name'),
'ports': [
{"containerPort": _data.get('port', 80)},
],
'env': [
{'name': "UUID", "value": _data.get('name', "None")},
{'name': "TYPE", "value": _data.get('genre', "None")},
{'name': "PORT", "value": str(_data.get('port', 80))},
{'name': "PDP_ID", "value": _data.get('pdp_id', "None")},
{'name': "META_RULE_ID", "value": _data.get('meta_rule_id', "None")},
{'name': "KEYSTONE_PROJECT_ID",
"value": _data.get('keystone_project_id', "None")},
]
}
)
resp = client.create_namespaced_deployment(body=pod_manifest,
namespace='moon')
logger.info("Pod {} created!".format(data[0].get('name')))
return resp
@staticmethod
def __create_service(client, data, expose=False):
service_manifest = {
'apiVersion': 'v1',
'kind': 'Service',
'metadata': {
'name': data.get('name'),
'namespace': 'moon'
},
'spec': {
'ports': [{
'port': data.get('port', 80),
'targetPort': data.get('port', 80)
}],
'selector': {
'app': data.get('name')
},
# 'type': 'NodePort',
'endpoints': [{
'port': data.get('port', 80),
'protocol': 'TCP',
}],
}
}
if expose:
service_manifest['spec']['ports'][0]['nodePort'] = \
configuration.increment_port()
service_manifest['spec']['type'] = "NodePort"
resp = client.create_namespaced_service(namespace="moon",
body=service_manifest)
logger.info("Service {} created!".format(data.get('name')))
return resp
def load_pod(self, data, api_client=None, ext_client=None, expose=False):
_client = api_client if api_client else self.client
pod = self.__create_pod(client=ext_client, data=data)
self.__create_service(client=_client, data=data[0],
expose=expose)
self.cache[pod.metadata.uid] = data
def delete_pod(self, uuid=None, name=None):
logger.info("Deleting pod {}".format(uuid))
# TODO: delete_namespaced_deployment
# https://github.com/kubernetes-incubator/client-python/blob/master/kubernetes/client/apis/extensions_v1beta1_api.py
def get_slaves(self):
contexts, active_context = config.list_kube_config_contexts()
return contexts, active_context
class Docker(Driver):
def load_pod(self, data, api_client=None, ext_client=None):
logger.info("Creating pod {}".format(data[0].get('name')))
raise NotImplementedError
def delete_pod(self, uuid=None, name=None):
logger.info("Deleting pod {}".format(uuid))
raise NotImplementedError
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