632 lines
21 KiB
Python
632 lines
21 KiB
Python
#!/usr/bin/env python
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# Copyright 2015 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import argparse
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from ConfigParser import SafeConfigParser
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import functools
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import json
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import logging
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import logging.config
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import logging.handlers
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import re
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import socket
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import StringIO
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import subprocess
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import sys
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from time import sleep
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from neutronclient.neutron import client as n_client
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LOG_NAME = 'q-agent-cleanup'
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API_VER = '2.0'
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PORT_ID_PART_LEN = 11
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def make_logger(handler=logging.StreamHandler(sys.stdout), level=logging.INFO):
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format = logging.Formatter("%(asctime)s - %(levelname)s - %(message)s")
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handler.setFormatter(format)
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logger = logging.getLogger(LOG_NAME)
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logger.addHandler(handler)
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logger.setLevel(level)
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return logger
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LOG = make_logger()
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AUTH_KEYS = {
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'tenant_name': 'admin_tenant_name',
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'username': 'admin_user',
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'password': 'admin_password',
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'auth_url': 'auth_uri',
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}
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def get_auth_data(cfg_file, section='keystone_authtoken', keys=AUTH_KEYS):
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cfg = SafeConfigParser()
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with open(cfg_file) as f:
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cfg.readfp(f)
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auth_data = {}
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for key, value in keys.iteritems():
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auth_data[key] = cfg.get(section, value)
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return auth_data
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# Note(xarses): be careful not to inject \n's into the regex pattern
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# or it will case the maching to fail
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RECOVERABLE = re.compile((
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'(HTTP\s+400\))|'
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'(400-\{\'message\'\:\s+\'\'\})|'
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'(\[Errno 111\]\s+Connection\s+refused)|'
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'(503\s+Service\s+Unavailable)|'
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'(504\s+Gateway\s+Time-out)|'
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'(\:\s+Maximum\s+attempts\s+reached)|'
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'(Unauthorized\:\s+bad\s+credentials)|'
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'(Max\s+retries\s+exceeded)|'
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"""('*NoneType'*\s+object\s+ha'\s+no\s+attribute\s+'*__getitem__'*$)|"""
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'(No\s+route\s+to\s+host$)|'
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'(Lost\s+connection\s+to\s+MySQL\s+server)'), flags=re.M)
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RETRY_COUNT = 50
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RETRY_DELAY = 2
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def retry(func, pattern=RECOVERABLE):
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@functools.wraps(func)
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def wrapper(*args, **kwargs):
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i = 0
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while True:
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try:
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return func(*args, **kwargs)
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except Exception as e:
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if pattern and not pattern.match(e.message):
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raise e
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i += 1
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if i >= RETRY_COUNT:
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raise e
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LOG.debug("retry request {0}: {1}".format(i, e))
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sleep(RETRY_DELAY)
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return wrapper
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class NeutronCleaner(object):
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PORT_NAME_PREFIXES_BY_DEV_OWNER = {
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'network:dhcp': 'tap',
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'network:router_gateway': 'qg-',
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'network:router_interface': 'qr-',
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}
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PORT_NAME_PREFIXES = {
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# contains tuples of prefixes
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'dhcp': (PORT_NAME_PREFIXES_BY_DEV_OWNER['network:dhcp'],),
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'l3': (
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PORT_NAME_PREFIXES_BY_DEV_OWNER['network:router_gateway'],
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PORT_NAME_PREFIXES_BY_DEV_OWNER['network:router_interface']
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)
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}
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BRIDGES_FOR_PORTS_BY_AGENT = {
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'dhcp': ('br-int',),
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'l3': ('br-int', 'br-ex'),
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}
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PORT_OWNER_PREFIXES = {
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'dhcp': ('network:dhcp',),
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'l3': ('network:router_gateway', 'network:router_interface')
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}
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NS_NAME_PREFIXES = {
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'dhcp': 'qdhcp',
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'l3': 'qrouter',
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}
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AGENT_BINARY_NAME = {
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'dhcp': 'neutron-dhcp-agent',
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'l3': 'neutron-vpn-agent',
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'ovs': 'neutron-openvswitch-agent'
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}
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CMD__list_ovs_port = ['ovs-vsctl', 'list-ports']
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CMD__remove_ovs_port = ['ovs-vsctl', '--', '--if-exists', 'del-port']
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CMD__remove_ip_addr = ['ip', 'address', 'delete']
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CMD__ip_netns_list = ['ip', 'netns', 'list']
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CMD__ip_netns_exec = ['ip', 'netns', 'exec']
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# 14: tap-xxxyyyzzz:
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RE__port_in_portlist = re.compile(r"^\s*\d+\:\s+([\w-]+)\:")
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def __init__(self, options, log=None):
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self.log = log
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self.auth_data = get_auth_data(cfg_file=options.get('authconf'))
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self.options = options
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self.agents = {}
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self.debug = options.get('debug')
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self.RESCHEDULING_CALLS = {
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'dhcp': self._reschedule_agent_dhcp,
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'l3': self._reschedule_agent_l3,
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}
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self._client = None
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@property
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@retry
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def client(self):
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if self._client is None:
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self._client = n_client.Client(API_VER, **self.auth_data)
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return self._client
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@retry
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def _get_agents(self, use_cache=True):
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return self.client.list_agents()['agents']
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@retry
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def _get_routers(self, use_cache=True):
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return self.client.list_routers()['routers']
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@retry
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def _get_networks(self, use_cache=True):
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return self.client.list_networks()['networks']
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@retry
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def _list_networks_on_dhcp_agent(self, agent_id):
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return self.client.list_networks_on_dhcp_agent(
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agent_id)['networks']
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@retry
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def _list_routers_on_l3_agent(self, agent_id):
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return self.client.list_routers_on_l3_agent(
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agent_id)['routers']
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@retry
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def _list_l3_agents_on_router(self, router_id):
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return self.client.list_l3_agent_hosting_routers(
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router_id)['agents']
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@retry
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def _list_dhcp_agents_on_network(self, network_id):
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return self.client.list_dhcp_agent_hosting_networks(
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network_id)['agents']
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def _list_orphaned_networks(self):
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networks = self._get_networks()
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self.log.debug(
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"_list_orphaned_networks:, got list of networks {0}".format(
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json.dumps(networks, indent=4)))
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orphaned_networks = []
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for network in networks:
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if len(self._list_dhcp_agents_on_network(network['id'])) == 0:
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orphaned_networks.append(network['id'])
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self.log.debug(
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"_list_orphaned_networks:, got list of orphaned networks {0}".
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format(orphaned_networks))
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return orphaned_networks
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def _list_orphaned_routers(self):
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routers = self._get_routers()
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self.log.debug(
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"_list_orphaned_routers:, got list of routers {0}".format(
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json.dumps(routers, indent=4)))
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orphaned_routers = []
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for router in routers:
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if len(self._list_l3_agents_on_router(router['id'])) == 0:
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orphaned_routers.append(router['id'])
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self.log.debug(
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"_list_orphaned_routers:, got list of orphaned routers {0}".format(
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orphaned_routers))
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return orphaned_routers
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@retry
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def _add_network_to_dhcp_agent(self, agent_id, net_id):
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return self.client.add_network_to_dhcp_agent(
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agent_id, {"network_id": net_id})
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@retry
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def _add_router_to_l3_agent(self, agent_id, router_id):
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return self.client.add_router_to_l3_agent(
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agent_id, {"router_id": router_id})
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@retry
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def _remove_router_from_l3_agent(self, agent_id, router_id):
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return self.client.remove_router_from_l3_agent(
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agent_id, router_id)
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@retry
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def _delete_agent(self, agent_id):
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return self.client.delete_agent(agent_id)
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def _get_agents_by_type(self, agent, use_cache=True):
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self.log.debug("_get_agents_by_type: start.")
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rv = self.agents.get(agent, []) if use_cache else []
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if not rv:
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agents = self._get_agents(use_cache=use_cache)
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for i in agents:
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if i['binary'] == self.AGENT_BINARY_NAME.get(agent):
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rv.append(i)
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from_cache = ''
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else:
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from_cache = ' from local cache'
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self.log.debug(
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"_get_agents_by_type: end, {0} rv: {1}".format(
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from_cache, json.dumps(rv, indent=4)))
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return rv
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def _execute(self, cmd):
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process = subprocess.Popen(
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cmd,
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shell=False,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE
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)
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(stdout, stderr) = process.communicate()
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ret_code = process.returncode
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if ret_code != 0:
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self.log.error(
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"ERROR (rc={0}) while execution {1}, stderr: {2}".format(
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ret_code, ' '.join(cmd), stderr))
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return None
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return ret_code, stdout
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def __collect_namespaces_for_agent(self, agent):
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cmd = self.CMD__ip_netns_list[:]
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self.log.debug("Execute command '{0}'".format(' '.join(cmd)))
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ret_code, stdout = self._execute(cmd)
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if ret_code != 0:
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return []
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# filter namespaces by given agent type
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netns = []
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for ns in StringIO.StringIO(stdout):
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ns = ns.strip()
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self.log.debug("Found network namespace '{0}'".format(ns))
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if ns.startswith(self.NS_NAME_PREFIXES[agent]):
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netns.append(ns)
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return netns
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def __collect_ports_for_namespace(self, ns):
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cmd = self.CMD__ip_netns_exec[:]
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cmd.extend([ns, 'ip', 'l', 'show'])
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self.log.debug("Execute command '{0}'".format(' '.join(cmd)))
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ret_code, stdout = self._execute(cmd)
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if ret_code != 0:
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return []
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ports = []
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for line in StringIO.StringIO(stdout):
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pp = self.RE__port_in_portlist.match(line)
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if not pp:
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continue
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port = pp.group(1)
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if port != 'lo':
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self.log.debug("Found port '{0}'".format(port))
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ports.append(port)
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return ports
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def _cleanup_ports(self, agent):
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self.log.debug("_cleanup_ports: start.")
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# get namespaces list
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netns = self.__collect_namespaces_for_agent(agent)
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# collect ports from namespace
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ports = []
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for ns in netns:
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ports.extend(self.__collect_ports_for_namespace(ns))
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# iterate by port_list and remove port from OVS
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for port in ports:
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cmd = self.CMD__remove_ovs_port[:]
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cmd.append(port)
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if self.options.get('noop'):
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self.log.info("NOOP-execution: '{0}'".format(' '.join(cmd)))
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else:
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self.log.debug("Execute command '{0}'".format(' '.join(cmd)))
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self._execute(cmd)
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self.log.debug("_cleanup_ports: end.")
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return True
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def _reschedule_agent_dhcp(self, agent_type):
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self.log.debug("_reschedule_agent_dhcp: start.")
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agents = {
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'alive': [],
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'dead': []
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}
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# collect networklist from dead DHCP-agents
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dead_networks = []
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for agent in self._get_agents_by_type(agent_type):
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if agent['alive']:
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self.log.info(
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"found alive DHCP agent: {0}".format(agent['id']))
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agents['alive'].append(agent)
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else:
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# dead agent
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self.log.info(
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"found dead DHCP agent: {0}".format(agent['id']))
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agents['dead'].append(agent)
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for net in self._list_networks_on_dhcp_agent(agent['id']):
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dead_networks.append(net)
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if dead_networks and agents['alive']:
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# get network-ID list of already attached to alive agent networks
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lucky_ids = set()
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map(
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lambda net: lucky_ids.add(net['id']),
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self._list_networks_on_dhcp_agent(agents['alive'][0]['id'])
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)
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# add dead networks to alive agent
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for net in dead_networks:
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if net['id'] not in lucky_ids:
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# attach network to agent
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self.log.info(
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"attach network {net} to DHCP agent {agent}".format(
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net=net['id'],
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agent=agents['alive'][0]['id']))
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if not self.options.get('noop'):
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self._add_network_to_dhcp_agent(
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agents['alive'][0]['id'], net['id'])
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# remove dead agents if need (and if found alive agent)
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if self.options.get('remove-dead'):
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for agent in agents['dead']:
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self.log.info(
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"remove dead DHCP agent: {0}".format(agent['id']))
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if not self.options.get('noop'):
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self._delete_agent(agent['id'])
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orphaned_networks = self._list_orphaned_networks()
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self.log.info("_reschedule_agent_dhcp: rescheduling orphaned networks")
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if orphaned_networks and agents['alive']:
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for network in orphaned_networks:
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self.log.info(
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"_reschedule_agent_dhcp: rescheduling {0} to {1}".format(
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network, agents['alive'][0]['id']))
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if not self.options.get('noop'):
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self._add_network_to_dhcp_agent(
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agents['alive'][0]['id'], network)
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self.log.info(
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"_reschedule_agent_dhcp: ended rescheduling of orphaned networks")
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self.log.debug("_reschedule_agent_dhcp: end.")
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def _reschedule_agent_l3(self, agent_type):
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self.log.debug("_reschedule_agent_l3: start.")
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agents = {
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'alive': [],
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'dead': []
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}
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# collect router-list from dead DHCP-agents
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dead_routers = [] # array of tuples (router, agentID)
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for agent in self._get_agents_by_type(agent_type):
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if agent['alive']:
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self.log.info("found alive L3 agent: {0}".format(agent['id']))
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agents['alive'].append(agent)
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else:
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# dead agent
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self.log.info("found dead L3 agent: {0}".format(agent['id']))
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agents['dead'].append(agent)
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map(
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lambda rou: dead_routers.append((rou, agent['id'])),
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self._list_routers_on_l3_agent(agent['id'])
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)
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self.log.debug(
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"L3 agents in cluster: {0}".format(
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json.dumps(agents, indent=4)))
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self.log.debug("Routers, attached to dead L3 agents: {0}".format(
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json.dumps(dead_routers, indent=4)))
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if dead_routers and agents['alive']:
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# get router-ID list of already attached to alive agent routerss
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lucky_ids = set()
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map(
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lambda rou: lucky_ids.add(rou['id']),
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self._list_routers_on_l3_agent(agents['alive'][0]['id'])
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)
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# remove dead agents after rescheduling
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for agent in agents['dead']:
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self.log.info("remove dead L3 agent: {0}".format(agent['id']))
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if not self.options.get('noop'):
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self._delete_agent(agent['id'])
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# move routers from dead to alive agent
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for rou in filter(
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lambda rr: not(rr[0]['id'] in lucky_ids), dead_routers):
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self.log.info(
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"schedule router {0} to L3 agent {1}".format(
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rou[0]['id'],
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agents['alive'][0]['id']))
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if not self.options.get('noop'):
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self._add_router_to_l3_agent(
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agents['alive'][0]['id'], rou[0]['id'])
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orphaned_routers = self._list_orphaned_routers()
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self.log.info("_reschedule_agent_l3: rescheduling orphaned routers")
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if orphaned_routers and agents['alive']:
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for router in orphaned_routers:
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self.log.info(
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"_reschedule_agent_l3: rescheduling {0} to {1}".format(
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router, agents['alive'][0]['id']))
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if not self.options.get('noop'):
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self._add_router_to_l3_agent(
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agents['alive'][0]['id'], router)
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self.log.info(
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"_reschedule_agent_l3: ended rescheduling of orphaned routers")
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self.log.debug("_reschedule_agent_l3: end.")
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def _remove_self(self, agent_type):
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self.log.debug("_remove_self: start.")
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for agent in self._get_agents_by_type(agent_type):
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if agent['host'] == socket.gethostname():
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self.log.info(
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"_remove_self: deleting our own agent {0} of type {1}".
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format(agent['id'], agent_type))
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if not self.options.get('noop'):
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self._delete_agent(agent['id'])
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self.log.debug("_remove_self: end.")
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def _reschedule_agent(self, agent):
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self.log.debug("_reschedule_agents: start.")
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task = self.RESCHEDULING_CALLS.get(agent, None)
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if task:
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task(agent)
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self.log.debug("_reschedule_agents: end.")
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def do(self, agent):
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if self.options.get('cleanup-ports'):
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self._cleanup_ports(agent)
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if self.options.get('reschedule'):
|
|
self._reschedule_agent(agent)
|
|
if self.options.get('remove-self'):
|
|
self._remove_self(agent)
|
|
|
|
def _test_healthy(self, agent_list, hostname):
|
|
rv = False
|
|
for agent in agent_list:
|
|
if agent['host'] == hostname and agent['alive']:
|
|
return True
|
|
return rv
|
|
|
|
def test_healthy(self, agent_type):
|
|
# OCF_FAILED_MASTER,
|
|
# http://www.linux-ha.org/doc/dev-guides/_literal_ocf_failed_master_literal_9.html
|
|
|
|
rc = 9
|
|
agentlist = self._get_agents_by_type(agent_type)
|
|
for hostname in self.options.get('test-hostnames'):
|
|
if self._test_healthy(agentlist, hostname):
|
|
return 0
|
|
return rc
|
|
|
|
|
|
if __name__ == '__main__':
|
|
parser = argparse.ArgumentParser(
|
|
description='Neutron network node cleaning tool.')
|
|
parser.add_argument(
|
|
"-c",
|
|
"--auth-config",
|
|
dest="authconf",
|
|
default="/etc/neutron/neutron.conf",
|
|
help="Read authconfig from service file",
|
|
metavar="FILE")
|
|
parser.add_argument(
|
|
"-t",
|
|
"--auth-token",
|
|
dest="auth-token",
|
|
default=None,
|
|
help="Authenticating token (instead username/passwd)",
|
|
metavar="TOKEN")
|
|
parser.add_argument(
|
|
"-u",
|
|
"--admin-auth-url",
|
|
dest="admin-auth-url",
|
|
default=None,
|
|
help="Authenticating URL (admin)",
|
|
metavar="URL")
|
|
parser.add_argument(
|
|
"--retries",
|
|
dest="retries",
|
|
type=int,
|
|
default=50,
|
|
help="try NN retries for API call",
|
|
metavar="NN")
|
|
parser.add_argument(
|
|
"--sleep",
|
|
dest="sleep",
|
|
type=int,
|
|
default=2,
|
|
help="sleep seconds between retries",
|
|
metavar="SEC")
|
|
parser.add_argument(
|
|
"-a",
|
|
"--agent",
|
|
dest="agent",
|
|
action="append",
|
|
help="specyfy agents for cleaning",
|
|
required=True)
|
|
parser.add_argument(
|
|
"--cleanup-ports",
|
|
dest="cleanup-ports",
|
|
action="store_true",
|
|
default=False,
|
|
help="cleanup ports for given agents on this node")
|
|
parser.add_argument(
|
|
"--remove-self",
|
|
dest="remove-self",
|
|
action="store_true",
|
|
default=False,
|
|
help="remove ourselves from agent list")
|
|
parser.add_argument(
|
|
"--activeonly",
|
|
dest="activeonly",
|
|
action="store_true",
|
|
default=False,
|
|
help="cleanup only active ports")
|
|
parser.add_argument(
|
|
"--reschedule",
|
|
dest="reschedule",
|
|
action="store_true",
|
|
default=False,
|
|
help="reschedule given agents")
|
|
parser.add_argument(
|
|
"--remove-dead",
|
|
dest="remove-dead",
|
|
action="store_true",
|
|
default=False,
|
|
help="remove dead agents while rescheduling")
|
|
parser.add_argument(
|
|
"--test-alive-for-hostname",
|
|
dest="test-hostnames",
|
|
action="append",
|
|
help="testing agent's healthy for given hostname")
|
|
parser.add_argument(
|
|
"--external-bridge",
|
|
dest="external-bridge",
|
|
default="br-ex",
|
|
help="external bridge name",
|
|
metavar="IFACE")
|
|
parser.add_argument(
|
|
"--integration-bridge",
|
|
dest="integration-bridge",
|
|
default="br-int",
|
|
help="integration bridge name",
|
|
metavar="IFACE")
|
|
parser.add_argument(
|
|
"-l",
|
|
"--log",
|
|
dest="log",
|
|
action="store",
|
|
help="log to file instead of STDOUT")
|
|
parser.add_argument(
|
|
"--noop",
|
|
dest="noop",
|
|
action="store_true",
|
|
default=False,
|
|
help="do not execute, print to log instead")
|
|
parser.add_argument(
|
|
"--debug",
|
|
dest="debug",
|
|
action="store_true",
|
|
default=False,
|
|
help="debug")
|
|
args = parser.parse_args()
|
|
RETRY_COUNT = args.retries
|
|
RETRY_DELAY = args.sleep
|
|
|
|
# setup logging
|
|
if args.log:
|
|
LOG = make_logger(
|
|
handler=logging.handlers.WatchedFileHandler(args.log))
|
|
|
|
if args.debug:
|
|
LOG.setLevel(logging.DEBUG)
|
|
|
|
LOG.info("Started: {0}".format(' '.join(sys.argv)))
|
|
cleaner = NeutronCleaner(options=vars(args), log=LOG)
|
|
rc = 0
|
|
if vars(args).get('test-hostnames'):
|
|
rc = cleaner.test_healthy(args.agent[0])
|
|
else:
|
|
for i in args.agent:
|
|
cleaner.do(i)
|
|
LOG.debug("End.")
|
|
sys.exit(rc)
|