601 lines
26 KiB
Python
601 lines
26 KiB
Python
#!/usr/bin/env python
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import re
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import time
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import os
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import sys
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import random
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import string
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import json
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import argparse
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import logging
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import logging.handlers
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import shlex
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import subprocess
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import StringIO
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import socket
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from neutronclient.neutron import client as q_client
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from keystoneclient.v2_0 import client as ks_client
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from keystoneclient.apiclient.exceptions import NotFound as ks_NotFound
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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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TMP_USER_NAME = 'tmp_neutron_admin'
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def get_authconfig(cfg_file):
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# Read OS auth config file
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rv = {}
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stripchars=" \'\""
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with open(cfg_file) as f:
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for line in f:
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rg = re.match(r'\s*export\s+(\w+)\s*=\s*(.*)',line)
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if rg :
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#Use shlex to unescape bash shell escape characters
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value = "".join(x for x in
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shlex.split(rg.group(2).strip(stripchars)))
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rv[rg.group(1).strip(stripchars)] = value
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return rv
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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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RE__port_in_portlist = re.compile(r"^\s*\d+\:\s+([\w-]+)\:") # 14: tap-xxxyyyzzz:
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def __init__(self, openrc, options, log=None):
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self.log = log
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self.auth_config = openrc
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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._token = None
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self._keystone = None
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self._client = None
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self._need_cleanup_tmp_admin = False
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def __del__(self):
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if self._need_cleanup_tmp_admin and self._keystone and self._keystone.username:
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try:
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self._keystone.users.delete(self._keystone.users.find(username=self._keystone.username))
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except:
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# if we get exception while cleaning temporary account -- nothing harm
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pass
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def generate_random_passwd(self, length=13):
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chars = string.ascii_letters + string.digits + '!@#$%^&*()'
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random.seed = (os.urandom(1024))
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return ''.join(random.choice(chars) for i in range(length))
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@property
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def keystone(self):
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if self._keystone is None:
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ret_count = self.options.get('retries', 1)
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tmp_passwd = self.generate_random_passwd()
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while True:
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if ret_count <= 0:
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self.log.error(">>> Keystone error: no more retries for connect to keystone server.")
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sys.exit(1)
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try:
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a_token = self.options.get('auth-token')
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a_url = self.options.get('admin-auth-url')
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if a_token and a_url:
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self.log.debug("Authentication by predefined token.")
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# create keystone instance, authorized by service token
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ks = ks_client.Client(
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token=a_token,
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endpoint=a_url,
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)
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service_tenant = ks.tenants.find(name='services')
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auth_url = ks.endpoints.find(
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service_id=ks.services.find(type='identity').id
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).internalurl
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# find and re-create temporary rescheduling-admin user with random password
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try:
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user = ks.users.find(username=TMP_USER_NAME)
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ks.users.delete(user)
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except ks_NotFound:
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# user not found, it's OK
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pass
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user = ks.users.create(TMP_USER_NAME, tmp_passwd, tenant_id=service_tenant.id)
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ks.roles.add_user_role(user, ks.roles.find(name='admin'), service_tenant)
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# authenticate newly-created tmp neutron admin
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self._keystone = ks_client.Client(
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username=user.username,
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password=tmp_passwd,
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tenant_id=user.tenantId,
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auth_url=auth_url,
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)
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self._need_cleanup_tmp_admin = True
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else:
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self.log.debug("Authentication by given credentionals.")
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self._keystone = ks_client.Client(
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username=self.auth_config['OS_USERNAME'],
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password=self.auth_config['OS_PASSWORD'],
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tenant_name=self.auth_config['OS_TENANT_NAME'],
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auth_url=self.auth_config['OS_AUTH_URL'],
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)
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break
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except Exception as e:
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errmsg = str(e.message).strip() # str() need, because keystone may use int as message in exception
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if re.search(r"Connection\s+refused$", errmsg, re.I) or \
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re.search(r"Connection\s+timed\s+out$", errmsg, re.I) or\
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re.search(r"Lost\s+connection\s+to\s+MySQL\s+server", errmsg, re.I) or\
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re.search(r"Service\s+Unavailable$", errmsg, re.I) or\
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re.search(r"'*NoneType'*\s+object\s+has\s+no\s+attribute\s+'*__getitem__'*$", errmsg, re.I) or \
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re.search(r"No\s+route\s+to\s+host$", errmsg, re.I):
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self.log.info(">>> Can't connect to {0}, wait for server ready...".format(self.auth_config['OS_AUTH_URL']))
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time.sleep(self.options.sleep)
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else:
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self.log.error(">>> Keystone error:\n{0}".format(e.message))
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raise e
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ret_count -= 1
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return self._keystone
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@property
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def token(self):
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if self._token is None:
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self._token = self._keystone.auth_token
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#self.log.debug("Auth_token: '{0}'".format(self._token))
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#todo: Validate existing token
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return self._token
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@property
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def client(self):
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if self._client is None:
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self._client = q_client.Client(
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API_VER,
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endpoint_url=self.keystone.endpoints.find(
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service_id=self.keystone.services.find(type='network').id
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).adminurl,
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token=self.token,
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)
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return self._client
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def _neutron_API_call(self, method, *args):
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ret_count = self.options.get('retries')
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while True:
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if ret_count <= 0:
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self.log.error("Q-server error: no more retries for connect to server.")
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return []
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try:
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rv = method (*args)
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break
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except Exception as e:
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errmsg = str(e.message).strip()
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if re.search(r"Connection\s+refused", errmsg, re.I) or\
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re.search(r"Connection\s+timed\s+out", errmsg, re.I) or\
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re.search(r"Lost\s+connection\s+to\s+MySQL\s+server", errmsg, re.I) or\
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re.search(r"503\s+Service\s+Unavailable", errmsg, re.I) or\
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re.search(r"No\s+route\s+to\s+host", errmsg, re.I):
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self.log.info("Can't connect to {0}, wait for server ready...".format(self.keystone.service_catalog.url_for(service_type='network')))
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time.sleep(self.options.sleep)
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else:
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self.log.error("Neutron error:\n{0}".format(e.message))
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raise e
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ret_count -= 1
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return rv
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def _get_agents(self,use_cache=True):
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return self._neutron_API_call(self.client.list_agents)['agents']
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def _get_routers(self, use_cache=True):
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return self._neutron_API_call(self.client.list_routers)['routers']
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def _get_networks(self, use_cache=True):
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return self._neutron_API_call(self.client.list_networks)['networks']
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def _list_networks_on_dhcp_agent(self, agent_id):
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return self._neutron_API_call(self.client.list_networks_on_dhcp_agent, agent_id)['networks']
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def _list_routers_on_l3_agent(self, agent_id):
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return self._neutron_API_call(self.client.list_routers_on_l3_agent, agent_id)['routers']
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def _list_l3_agents_on_router(self, router_id):
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return self._neutron_API_call(self.client.list_l3_agent_hosting_routers, router_id)['agents']
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def _list_dhcp_agents_on_network(self, network_id):
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return self._neutron_API_call(self.client.list_dhcp_agent_hosting_networks, 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("_list_orphaned_networks:, got list of networks {0}".format(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("_list_orphaned_networks:, got list of orphaned networks {0}".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("_list_orphaned_routers:, got list of routers {0}".format(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("_list_orphaned_routers:, got list of orphaned routers {0}".format(orphaned_routers))
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return orphaned_routers
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def _add_network_to_dhcp_agent(self, agent_id, net_id):
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return self._neutron_API_call(self.client.add_network_to_dhcp_agent, agent_id, {"network_id": net_id})
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def _add_router_to_l3_agent(self, agent_id, router_id):
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return self._neutron_API_call(self.client.add_router_to_l3_agent, agent_id, {"router_id": router_id})
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def _remove_router_from_l3_agent(self, agent_id, router_id):
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return self._neutron_API_call(self.client.remove_router_from_l3_agent, agent_id, router_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("_get_agents_by_type: end, {0} rv: {1}".format(from_cache, json.dumps(rv, indent=4)))
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return rv
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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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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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rc = process.wait()
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if rc != 0:
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self.log.error("ERROR (rc={0}) while execution {1}".format(rc, ' '.join(cmd)))
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return []
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# filter namespaces by given agent type
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netns = []
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stdout = process.communicate()[0]
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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("{0}-".format(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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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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rc = process.wait()
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if rc != 0:
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self.log.error("ERROR (rc={0}) while execution {1}".format(rc, ' '.join(cmd)))
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return []
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ports = []
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stdout = process.communicate()[0]
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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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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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rc = process.wait()
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if rc != 0:
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self.log.error("ERROR (rc={0}) while execution {1}".format(rc, ' '.join(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("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("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("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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))
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if not self.options.get('noop'):
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self._add_network_to_dhcp_agent(agents['alive'][0]['id'], net['id'])
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#if error:
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# return
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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("remove dead DHCP agent: {0}".format(agent['id']))
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if not self.options.get('noop'):
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self._neutron_API_call(self.client.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("_reschedule_agent_dhcp: rescheduling {0} to {1}".format(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(agents['alive'][0]['id'], network)
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self.log.info("_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("L3 agents in cluster: {ags}".format(ags=json.dumps(agents, indent=4)))
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self.log.debug("Routers, attached to dead L3 agents: {rr}".format(rr=json.dumps(dead_routers, indent=4)))
|
|
|
|
|
|
if dead_routers and agents['alive']:
|
|
# get router-ID list of already attached to alive agent routerss
|
|
lucky_ids = set()
|
|
map(
|
|
lambda rou: lucky_ids.add(rou['id']),
|
|
self._list_routers_on_l3_agent(agents['alive'][0]['id'])
|
|
)
|
|
# remove dead agents after rescheduling
|
|
for agent in agents['dead']:
|
|
self.log.info("remove dead L3 agent: {0}".format(agent['id']))
|
|
if not self.options.get('noop'):
|
|
self._neutron_API_call(self.client.delete_agent, agent['id'])
|
|
# move routers from dead to alive agent
|
|
for rou in filter(lambda rr: not(rr[0]['id'] in lucky_ids), dead_routers):
|
|
# self.log.info("unschedule router {rou} from L3 agent {agent}".format(
|
|
# rou=rou[0]['id'],
|
|
# agent=rou[1]
|
|
# ))
|
|
# if not self.options.get('noop'):
|
|
# self._remove_router_from_l3_agent(rou[1], rou[0]['id'])
|
|
# #todo: if error:
|
|
# #
|
|
self.log.info("schedule router {rou} to L3 agent {agent}".format(
|
|
rou=rou[0]['id'],
|
|
agent=agents['alive'][0]['id']
|
|
))
|
|
if not self.options.get('noop'):
|
|
self._add_router_to_l3_agent(agents['alive'][0]['id'], rou[0]['id'])
|
|
|
|
orphaned_routers=self._list_orphaned_routers()
|
|
self.log.info("_reschedule_agent_l3: rescheduling orphaned routers")
|
|
if orphaned_routers and agents['alive']:
|
|
for router in orphaned_routers:
|
|
self.log.info("_reschedule_agent_l3: rescheduling {0} to {1}".format(router,agents['alive'][0]['id']))
|
|
if not self.options.get('noop'):
|
|
self._add_router_to_l3_agent(agents['alive'][0]['id'], router)
|
|
self.log.info("_reschedule_agent_l3: ended rescheduling of orphaned routers")
|
|
self.log.debug("_reschedule_agent_l3: end.")
|
|
|
|
def _remove_self(self,agent_type):
|
|
self.log.debug("_remove_self: start.")
|
|
for agent in self._get_agents_by_type(agent_type):
|
|
if agent['host'] == socket.gethostname():
|
|
self.log.info("_remove_self: deleting our own agent {0} of type {1}".format(agent['id'],agent_type))
|
|
if not self.options.get('noop'):
|
|
self._neutron_API_call(self.client.delete_agent, agent['id'])
|
|
self.log.debug("_remove_self: end.")
|
|
|
|
|
|
def _reschedule_agent(self, agent):
|
|
self.log.debug("_reschedule_agents: start.")
|
|
task = self.RESCHEDULING_CALLS.get(agent, None)
|
|
if task:
|
|
task (agent)
|
|
self.log.debug("_reschedule_agents: end.")
|
|
|
|
def do(self, agent):
|
|
if self.options.get('cleanup-ports'):
|
|
self._cleanup_ports(agent)
|
|
if self.options.get('reschedule'):
|
|
self._reschedule_agent(agent)
|
|
if self.options.get('remove-self'):
|
|
self._remove_self(agent)
|
|
# if self.options.get('remove-agent'):
|
|
# self._cleanup_agents(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):
|
|
rc = 9 # OCF_FAILED_MASTER, http://www.linux-ha.org/doc/dev-guides/_literal_ocf_failed_master_literal_9.html
|
|
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="/root/openrc",
|
|
help="Authenticating config 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 file or logging.conf location")
|
|
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()
|
|
# if len(args) != 1:
|
|
# parser.error("incorrect number of arguments")
|
|
# parser.print_help() args = parser.parse_args()
|
|
|
|
#setup logging
|
|
if args.debug:
|
|
_log_level = logging.DEBUG
|
|
else:
|
|
_log_level = logging.INFO
|
|
if not args.log:
|
|
# log config or file not given -- log to console
|
|
LOG = logging.getLogger(LOG_NAME) # do not move to UP of file
|
|
_log_handler = logging.StreamHandler(sys.stdout)
|
|
_log_handler.setFormatter(logging.Formatter("%(asctime)s - %(levelname)s - %(message)s"))
|
|
LOG.addHandler(_log_handler)
|
|
LOG.setLevel(_log_level)
|
|
elif args.log.split(os.sep)[-1] == 'logging.conf':
|
|
# setup logging by external file
|
|
import logging.config
|
|
logging.config.fileConfig(args.log)
|
|
LOG = logging.getLogger(LOG_NAME) # do not move to UP of file
|
|
else:
|
|
# log to given file
|
|
LOG = logging.getLogger(LOG_NAME) # do not move to UP of file
|
|
LOG.addHandler(logging.handlers.WatchedFileHandler(args.log))
|
|
LOG.setLevel(_log_level)
|
|
|
|
LOG.info("Started: {0}".format(' '.join(sys.argv)))
|
|
cleaner = NeutronCleaner(get_authconfig(args.authconf), 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)
|
|
#
|
|
###
|