291 lines
12 KiB
Python
291 lines
12 KiB
Python
# Copyright (c) 2016 Mirantis, Inc.
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
import contextlib
|
|
import itertools
|
|
import os
|
|
import ssl
|
|
from urllib import parse
|
|
|
|
from oslo_log import log as logging
|
|
from oslo_serialization import jsonutils
|
|
import requests
|
|
from requests import adapters
|
|
|
|
from kuryr.lib._i18n import _
|
|
from kuryr_kubernetes import config
|
|
from kuryr_kubernetes import constants
|
|
from kuryr_kubernetes import exceptions as exc
|
|
|
|
CONF = config.CONF
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class K8sClient(object):
|
|
# REVISIT(ivc): replace with python-k8sclient if it could be extended
|
|
# with 'WATCH' support
|
|
|
|
def __init__(self, base_url):
|
|
self._base_url = base_url
|
|
cert_file = config.CONF.kubernetes.ssl_client_crt_file
|
|
key_file = config.CONF.kubernetes.ssl_client_key_file
|
|
ca_crt_file = config.CONF.kubernetes.ssl_ca_crt_file
|
|
self.verify_server = config.CONF.kubernetes.ssl_verify_server_crt
|
|
token_file = config.CONF.kubernetes.token_file
|
|
self.token = None
|
|
self.cert = (None, None)
|
|
|
|
# Setting higher numbers regarding connection pools as we're running
|
|
# with max of 1000 green threads.
|
|
self.session = requests.Session()
|
|
prefix = '%s://' % parse.urlparse(base_url).scheme
|
|
self.session.mount(prefix, adapters.HTTPAdapter(pool_maxsize=1000))
|
|
if token_file:
|
|
if os.path.exists(token_file):
|
|
with open(token_file, 'r') as f:
|
|
self.token = f.readline().rstrip('\n')
|
|
else:
|
|
raise RuntimeError(
|
|
_("Unable to find token_file : %s") % token_file)
|
|
else:
|
|
if cert_file and not os.path.exists(cert_file):
|
|
raise RuntimeError(
|
|
_("Unable to find ssl cert_file : %s") % cert_file)
|
|
if key_file and not os.path.exists(key_file):
|
|
raise RuntimeError(
|
|
_("Unable to find ssl key_file : %s") % key_file)
|
|
self.cert = (cert_file, key_file)
|
|
if self.verify_server:
|
|
if not ca_crt_file:
|
|
raise RuntimeError(
|
|
_("ssl_ca_crt_file cannot be None"))
|
|
elif not os.path.exists(ca_crt_file):
|
|
raise RuntimeError(
|
|
_("Unable to find ca cert_file : %s") % ca_crt_file)
|
|
else:
|
|
self.verify_server = ca_crt_file
|
|
|
|
def _raise_from_response(self, response):
|
|
if response.status_code == requests.codes.not_found:
|
|
raise exc.K8sResourceNotFound(response.text)
|
|
if not response.ok:
|
|
raise exc.K8sClientException(response.text)
|
|
|
|
def get(self, path, json=True, headers=None):
|
|
LOG.debug("Get %(path)s", {'path': path})
|
|
url = self._base_url + path
|
|
header = {}
|
|
if self.token:
|
|
header.update({'Authorization': 'Bearer %s' % self.token})
|
|
if headers:
|
|
header.update(headers)
|
|
response = self.session.get(url, cert=self.cert,
|
|
verify=self.verify_server,
|
|
headers=header)
|
|
self._raise_from_response(response)
|
|
result = response.json() if json else response.text
|
|
return result
|
|
|
|
def _get_url_and_header(self, path, content_type):
|
|
url = self._base_url + path
|
|
header = {'Content-Type': content_type,
|
|
'Accept': 'application/json'}
|
|
if self.token:
|
|
header.update({'Authorization': 'Bearer %s' % self.token})
|
|
|
|
return url, header
|
|
|
|
def patch(self, field, path, data):
|
|
LOG.debug("Patch %(path)s: %(data)s", {
|
|
'path': path, 'data': data})
|
|
if field == 'status':
|
|
path = path + '/' + str(field)
|
|
content_type = 'application/merge-patch+json'
|
|
url, header = self._get_url_and_header(path, content_type)
|
|
response = self.session.patch(url, json={field: data},
|
|
headers=header, cert=self.cert,
|
|
verify=self.verify_server)
|
|
self._raise_from_response(response)
|
|
return response.json().get('status')
|
|
|
|
def patch_crd(self, field, path, data):
|
|
content_type = 'application/json-patch+json'
|
|
url, header = self._get_url_and_header(path, content_type)
|
|
|
|
data = [{'op': 'replace',
|
|
'path': '/{}/{}'.format(field, np_field),
|
|
'value': value}
|
|
for np_field, value in data.items()]
|
|
|
|
LOG.debug("Patch %(path)s: %(data)s", {
|
|
'path': path, 'data': data})
|
|
|
|
response = self.session.patch(url, data=jsonutils.dumps(data),
|
|
headers=header, cert=self.cert,
|
|
verify=self.verify_server)
|
|
self._raise_from_response(response)
|
|
return response.json().get('status')
|
|
|
|
def patch_node_annotations(self, node, annotation_name, value):
|
|
content_type = 'application/json-patch+json'
|
|
path = '{}/nodes/{}/'.format(constants.K8S_API_BASE, node)
|
|
value = jsonutils.dumps(value)
|
|
url, header = self._get_url_and_header(path, content_type)
|
|
|
|
data = [{'op': 'add',
|
|
'path': '/metadata/annotations/{}'.format(annotation_name),
|
|
'value': value}]
|
|
|
|
response = self.session.patch(url, data=jsonutils.dumps(data),
|
|
headers=header, cert=self.cert,
|
|
verify=self.verify_server)
|
|
self._raise_from_response(response)
|
|
return response.json().get('status')
|
|
|
|
def remove_node_annotations(self, node, annotation_name):
|
|
content_type = 'application/json-patch+json'
|
|
path = '{}/nodes/{}/'.format(constants.K8S_API_BASE, node)
|
|
url, header = self._get_url_and_header(path, content_type)
|
|
|
|
data = [{'op': 'remove',
|
|
'path': '/metadata/annotations/{}'.format(annotation_name)}]
|
|
|
|
response = self.session.patch(url, data=jsonutils.dumps(data),
|
|
headers=header, cert=self.cert,
|
|
verify=self.verify_server)
|
|
self._raise_from_response(response)
|
|
return response.json().get('status')
|
|
|
|
def post(self, path, body):
|
|
LOG.debug("Post %(path)s: %(body)s", {'path': path, 'body': body})
|
|
url = self._base_url + path
|
|
header = {'Content-Type': 'application/json'}
|
|
if self.token:
|
|
header.update({'Authorization': 'Bearer %s' % self.token})
|
|
|
|
response = self.session.post(url, json=body, cert=self.cert,
|
|
verify=self.verify_server, headers=header)
|
|
self._raise_from_response(response)
|
|
return response.json()
|
|
|
|
def delete(self, path):
|
|
LOG.debug("Delete %(path)s", {'path': path})
|
|
url = self._base_url + path
|
|
header = {'Content-Type': 'application/json'}
|
|
if self.token:
|
|
header.update({'Authorization': 'Bearer %s' % self.token})
|
|
|
|
response = self.session.delete(url, cert=self.cert,
|
|
verify=self.verify_server,
|
|
headers=header)
|
|
self._raise_from_response(response)
|
|
return response.json()
|
|
|
|
def annotate(self, path, annotations, resource_version=None):
|
|
"""Pushes a resource annotation to the K8s API resource
|
|
|
|
The annotate operation is made with a PATCH HTTP request of kind:
|
|
application/merge-patch+json as described in:
|
|
|
|
https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/api-conventions.md#patch-operations # noqa
|
|
"""
|
|
LOG.debug("Annotate %(path)s: %(names)s", {
|
|
'path': path, 'names': list(annotations)})
|
|
|
|
content_type = 'application/merge-patch+json'
|
|
url, header = self._get_url_and_header(path, content_type)
|
|
|
|
while itertools.count(1):
|
|
metadata = {"annotations": annotations}
|
|
if resource_version:
|
|
metadata['resourceVersion'] = resource_version
|
|
data = jsonutils.dumps({"metadata": metadata}, sort_keys=True)
|
|
response = self.session.patch(url, data=data,
|
|
headers=header, cert=self.cert,
|
|
verify=self.verify_server)
|
|
if response.ok:
|
|
return response.json()['metadata']['annotations']
|
|
if response.status_code == requests.codes.conflict:
|
|
resource = self.get(path)
|
|
new_version = resource['metadata']['resourceVersion']
|
|
retrieved_annotations = resource['metadata'].get(
|
|
'annotations', {})
|
|
|
|
for k, v in annotations.items():
|
|
if v != retrieved_annotations.get(k):
|
|
break
|
|
else:
|
|
LOG.debug("Annotations for %(path)s already present: "
|
|
"%(names)s", {'path': path,
|
|
'names': retrieved_annotations})
|
|
return retrieved_annotations
|
|
# Retry patching with updated resourceVersion
|
|
resource_version = new_version
|
|
continue
|
|
|
|
LOG.error("Exception response, headers: %(headers)s, "
|
|
"content: %(content)s, text: %(text)s"
|
|
% {'headers': response.headers,
|
|
'content': response.content, 'text': response.text})
|
|
|
|
self._raise_from_response(response)
|
|
|
|
def watch(self, path):
|
|
url = self._base_url + path
|
|
resource_version = None
|
|
header = {}
|
|
timeouts = (CONF.kubernetes.watch_connection_timeout,
|
|
CONF.kubernetes.watch_read_timeout)
|
|
if self.token:
|
|
header.update({'Authorization': 'Bearer %s' % self.token})
|
|
|
|
while True:
|
|
try:
|
|
params = {'watch': 'true'}
|
|
if resource_version:
|
|
params['resourceVersion'] = resource_version
|
|
with contextlib.closing(
|
|
self.session.get(
|
|
url, params=params, stream=True, cert=self.cert,
|
|
verify=self.verify_server, headers=header,
|
|
timeout=timeouts)) as response:
|
|
if not response.ok:
|
|
raise exc.K8sClientException(response.text)
|
|
for line in response.iter_lines():
|
|
line = line.decode('utf-8').strip()
|
|
if line:
|
|
line_dict = jsonutils.loads(line)
|
|
yield line_dict
|
|
# Saving the resourceVersion in case of a restart.
|
|
# At this point it's safely passed to handler.
|
|
m = line_dict.get('object', {}).get('metadata', {})
|
|
resource_version = m.get('resourceVersion', None)
|
|
except (requests.ReadTimeout, requests.ConnectionError,
|
|
ssl.SSLError) as e:
|
|
if isinstance(e, ssl.SSLError) and e.args != ('timed out',):
|
|
raise
|
|
|
|
LOG.warning('%ds without data received from watching %s. '
|
|
'Retrying the connection with resourceVersion=%s.',
|
|
timeouts[1], path, params.get('resourceVersion'))
|
|
except requests.exceptions.ChunkedEncodingError:
|
|
LOG.warning("Connection to %s closed when watching. This "
|
|
"mostly happens when Octavia's Amphora closes "
|
|
"connection due to lack of activity for 50s. "
|
|
"Since Rocky Octavia this is configurable and "
|
|
"should be set to at least 20m, so check timeouts "
|
|
"on Kubernetes API LB listener. Restarting "
|
|
"connection with resourceVersion=%s.", path,
|
|
params.get('resourceVersion'))
|