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# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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 time
from libcloud.utils.py3 import httplib
try:
import simplejson as json
except ImportError:
import json
from libcloud.utils.misc import reverse_dict
from libcloud.common.types import LibcloudError
from libcloud.common.gogrid import GoGridConnection, GoGridResponse,\
BaseGoGridDriver
from libcloud.loadbalancer.base import LoadBalancer, Member, Driver, Algorithm
from libcloud.loadbalancer.base import DEFAULT_ALGORITHM
from libcloud.loadbalancer.types import State, LibcloudLBImmutableError
[docs]class GoGridLBResponse(GoGridResponse):
[docs] def success(self):
if self.status == httplib.INTERNAL_SERVER_ERROR:
# Hack, but at least this error message is more useful than
# "unexpected server error"
body = json.loads(self.body)
if body['method'] == '/grid/loadbalancer/add' and \
len(body['list']) >= 1 and \
body['list'][0]['message'].find(
'unexpected server error') != -1:
raise LibcloudError(
value='You mostly likely tried to add a member with an IP'
' address not assigned to your account', driver=self)
return super(GoGridLBResponse, self).success()
[docs]class GoGridLBConnection(GoGridConnection):
"""
Connection class for the GoGrid load-balancer driver.
"""
responseCls = GoGridLBResponse
[docs]class GoGridLBDriver(BaseGoGridDriver, Driver):
connectionCls = GoGridLBConnection
api_name = 'gogrid_lb'
name = 'GoGrid LB'
website = 'http://www.gogrid.com/'
LB_STATE_MAP = {'On': State.RUNNING,
'Unknown': State.UNKNOWN}
_VALUE_TO_ALGORITHM_MAP = {
'round robin': Algorithm.ROUND_ROBIN,
'least connect': Algorithm.LEAST_CONNECTIONS
}
_ALGORITHM_TO_VALUE_MAP = reverse_dict(_VALUE_TO_ALGORITHM_MAP)
def __init__(self, *args, **kwargs):
"""
@inherits: :class:`Driver.__init__`
"""
super(GoGridLBDriver, self).__init__(*args, **kwargs)
[docs] def list_protocols(self):
# GoGrid only supports http
return ['http']
[docs] def list_balancers(self):
return self._to_balancers(
self.connection.request('/api/grid/loadbalancer/list').object)
[docs] def ex_create_balancer_nowait(self, name, members, protocol='http',
port=80, algorithm=DEFAULT_ALGORITHM):
"""
@inherits: :class:`Driver.create_balancer`
"""
algorithm = self._algorithm_to_value(algorithm)
params = {'name': name,
'loadbalancer.type': algorithm,
'virtualip.ip': self._get_first_ip(),
'virtualip.port': port}
params.update(self._members_to_params(members))
resp = self.connection.request('/api/grid/loadbalancer/add',
method='GET',
params=params)
return self._to_balancers(resp.object)[0]
[docs] def create_balancer(self, name, members, protocol='http', port=80,
algorithm=DEFAULT_ALGORITHM):
balancer = self.ex_create_balancer_nowait(name, members, protocol,
port, algorithm)
timeout = 60 * 20
waittime = 0
interval = 2 * 15
if balancer.id is not None:
return balancer
else:
while waittime < timeout:
balancers = self.list_balancers()
for i in balancers:
if i.name == balancer.name and i.id is not None:
return i
waittime += interval
time.sleep(interval)
raise Exception('Failed to get id')
[docs] def destroy_balancer(self, balancer):
try:
resp = self.connection.request(
'/api/grid/loadbalancer/delete', method='POST',
params={'id': balancer.id})
except Exception as e:
if "Update request for LoadBalancer" in str(e):
raise LibcloudLBImmutableError(
"Cannot delete immutable object", GoGridLBDriver)
else:
raise
return resp.status == 200
[docs] def get_balancer(self, **kwargs):
params = {}
try:
params['name'] = kwargs['ex_balancer_name']
except KeyError:
balancer_id = kwargs['balancer_id']
params['id'] = balancer_id
resp = self.connection.request('/api/grid/loadbalancer/get',
params=params)
return self._to_balancers(resp.object)[0]
[docs] def balancer_attach_member(self, balancer, member):
members = self.balancer_list_members(balancer)
members.append(member)
params = {"id": balancer.id}
params.update(self._members_to_params(members))
resp = self._update_balancer(params)
return [m for m in
self._to_members(resp.object["list"][0]["realiplist"],
balancer)
if m.ip == member.ip][0]
[docs] def balancer_detach_member(self, balancer, member):
members = self.balancer_list_members(balancer)
remaining_members = [n for n in members if n.id != member.id]
params = {"id": balancer.id}
params.update(self._members_to_params(remaining_members))
resp = self._update_balancer(params)
return resp.status == 200
[docs] def balancer_list_members(self, balancer):
resp = self.connection.request('/api/grid/loadbalancer/get',
params={'id': balancer.id})
return self._to_members(resp.object["list"][0]["realiplist"], balancer)
def _update_balancer(self, params):
try:
return self.connection.request('/api/grid/loadbalancer/edit',
method='POST',
params=params)
except Exception as e:
if "Update already pending" in str(e):
raise LibcloudLBImmutableError(
"Balancer is immutable", GoGridLBDriver)
raise LibcloudError(value='Exception: %s' % str(e), driver=self)
def _members_to_params(self, members):
"""
Helper method to convert list of :class:`Member` objects
to GET params.
"""
params = {}
i = 0
for member in members:
params["realiplist.%s.ip" % i] = member.ip
params["realiplist.%s.port" % i] = member.port
i += 1
return params
def _to_balancers(self, object):
return [self._to_balancer(el) for el in object["list"]]
def _to_balancer(self, el):
lb = LoadBalancer(id=el.get("id"),
name=el["name"],
state=self.LB_STATE_MAP.get(
el["state"]["name"], State.UNKNOWN),
ip=el["virtualip"]["ip"]["ip"],
port=el["virtualip"]["port"],
driver=self.connection.driver)
return lb
def _to_members(self, object, balancer=None):
return [self._to_member(el, balancer) for el in object]
def _to_member(self, el, balancer=None):
member = Member(id=el["ip"]["id"],
ip=el["ip"]["ip"],
port=el["port"],
balancer=balancer)
return member