356 lines
15 KiB
Python
356 lines
15 KiB
Python
#. -*- coding: utf-8
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#
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# vdc
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#import site packages
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import base64
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import json
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import re
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import datetime
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import random
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import netaddr
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#import local packages
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import utils
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import plugin
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import ioconfig
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logger = ioconfig.logger
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config = ioconfig.parser
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def query_vm(req_cube_id):
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""" returns slave_name, vm_id and vm_type for the requested cubeid """
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data = querydb(req_cube_id)
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print(data)
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return data['slave'], data['type'], data['vmid']
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def querydb(cubeid):
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""" open a metadata file """
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try:
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dbfile = 'db/vm.{}.json'.format(cubeid)
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dbf = open(dbfile, 'r')
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data = json.load(dbf)
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dbf.close()
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logger.info('{}> <-- {}'.format(dbfile, data))
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return data
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except Exception as e:
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logger.critical('{}> '.format(e))
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pass
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return None
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def writedb(src_data):
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""" create new metadata file """
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try:
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dbfile = 'db/vm.{}.json'.format(src_data['cube'])
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dbf = open(dbfile, 'w')
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json.dump(src_data, dbf)
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dbf.close()
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#TODO: send mail
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logger.info('grid> {} --> {}'.format(src_data, dbfile))
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except Exception as e:
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logger.critical('grid> {}'.format(e))
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pass
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return None
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def query_happiness(region_id):
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""" analyzes grid data for the reuqested region and returns proposed slave_id,
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based on a "happiness" factor. happiness means alive and free :) """
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grid_data = readcache()
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grid_data = grid_data[str(region_id)]
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all_slaves = []
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for element in grid_data:
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try:
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if str(element) == grid_data[element]['id']:
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all_slaves.append(element)
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except:
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continue
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all_slaves = [ int(x) for x in all_slaves ] #convert values from str to int
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alive_slaves = []
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for slaveid in all_slaves:
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if str(grid_data[str(slaveid)]['alive']) == 'up':
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alive_slaves.append(slaveid)
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logger.info('region[{}]> alive slaves {}'.format(str(region_id), str(alive_slaves)))
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#happy_slave = random.choice(alive_slaves)
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if len(alive_slaves) < 1:
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logger.error('region[{}]> grid is full. add more slaves'.format(str(region_id)))
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else:
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happy_slave = 0 #TODO: analyze slaves and make informed decision.
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logger.info('region[{}]> {} selected'.format(str(region_id), str(happy_slave)))
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return happy_slave
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def generate_ipv4(region_name, how_many=1):
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""" this function should check the range, exclude deployed machines and return a list of available ips """
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ip_range_min = ioconfig.parser.get(str(region_name), 'ipv4_min')
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ip_range_max = ioconfig.parser.get(str(region_name), 'ipv4_max')
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region_ipset = netaddr.IPSet(netaddr.IPRange(ip_range_min, ip_range_max))
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region_ips = []
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for ip in region_ipset:
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region_ips.append(ip)
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ip_min = 0
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ip_max = len(region_ips) - 1
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tested_ips = [] #initialize ip cache
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requested_ips = []
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#all_ips = utils.find_rec(grid_data, 'ipaddr') #TODO: we cant list that for KVM so we should use another approach. perhaps as separate macaddress - ipaddress table which we will use to manipulate a static lease dhcp server. at this point this function is useless because plugins do not or cant track the address of the actual machine. proxmaster should divide each region to segments and each segment should export a static lease config which will be quieried when we search for unused addresses.
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all_ips = [] #TODO: replace with db searching function
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for ips in range(int(how_many)):
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counter = 0
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while True:
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if counter == 50:
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logger.error('region[{}]> ip range full'.format(str(region_name)))
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return None
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else:
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counter += 1
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requested_ip_index = random.randint(ip_min, ip_max)
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requested_ip = str(region_ips[requested_ip_index])
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if requested_ip in tested_ips:
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logger.warning('region[{}]> ip addres {} already tested. cache: {}'.format(str(region_name), str(requested_ip), str(tested_ips)))
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continue
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if requested_ip in requested_ips:
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logger.warning('region[{}]> ip address {} already generated.'.format(str(region_name), str(requested_ip)))
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tested_ips.append(requested_ip)
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continue
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if requested_ip in all_ips:
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position = used_ips.index(requested_ip)
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logger.warning('region[{}]> ip address {} already exist. location: {}'.format(str(region_name), str(position)))
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tested_ips.append(requested_ip)
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continue
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else:
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tested_ips = [] #clear ip cache
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break
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logger.info('region[{}]> ip address {} selected.'.format(str(region_name), str(requested_ip)))
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requested_ips.append(requested_ip)
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logger.info('region[{}]> ip addresses {} selected.'.format(str(region_name), str(requested_ips)))
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return requested_ips
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def genmac(int_value):
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""" convert kinda long enough int to MAC string """
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prefix_sum = sum(int(digit) for digit in str(int_value))
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if (prefix_sum > 255):
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prefix_hex = 'ff'
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else:
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prefix_hex = format(prefix_sum, 'x')
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suffix = int(str(int_value)[-12:])
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suffix_hex = format(suffix, 'x')
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length = len(suffix_hex)
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suffix_hex = suffix_hex.zfill(length+length%2)
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addr = prefix_hex + suffix_hex
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#logger.info('grid> mac-string {} genrated from: {} ({}->{}) ({}->{}) '.format(addr, int_value, prefix, prefix_hex, suffix, suffix_hex))
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print('grid> mac-string {} genrated from: {} (sum {}->{}) ({}->{}) '.format(addr, int_value, prefix_sum, prefix_hex, suffix, suffix_hex))
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return ':'.join(addr[i:i+2] for i in range(0,len(addr),2))
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def generate_vmid():
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""" analyzes cached grid data and return proposed vmid for new machines """
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grid_data = readcache()
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tested_vmids = [] #initialize id cache
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id_min = grid_data['vmid_min']
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id_max = grid_data['vmid_max']
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#all_vmid = utils.find_rec(grid_data, 'vmid') #get all vmid values from the nested grid
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all_vmid = [] #TODO: see generate_ipv4 remark
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all_vmid = [ int(x) for x in all_vmid ] #convert values from str to int (its a vmid right?)
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counter = 0
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while True:
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if counter == 50:
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logger.error('grid> ip range full')
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return None
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else:
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counter += 1
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requested_vmid = random.randint(int(id_min), int(id_max)) #max 90k machines
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if requested_vmid in tested_vmids:
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logger.warning('grid> vmid ' + str(requested_vmid) + ' already tested. cache:' + str(tested_vmids))
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continue
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if requested_vmid in all_vmid:
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position = all_vmid.index(requested_vmid)
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logger.warning('grid> vmid ' + str(requested_vmid) + ' already exist. location:' + str(position))
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tested_vmids.append(requested_vmid)
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else:
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tested_vmids = [] #clear tested vmid cache
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break
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logger.info('grid> vmid ' + str(requested_vmid) + ' selected')
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return requested_vmid
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def findDiff(d1, d2, path=""):
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for k in d1.keys():
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if not k in d2.keys():
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logger.warning('cache> ' + str(k) + ' as key not in d2')
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else:
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if type(d1[k]) is dict:
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if path == "":
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path = k
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else:
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path = path + "->" + k
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findDiff(d1[k],d2[k], path)
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else:
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if d1[k] != d2[k]:
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logger.warning('cache> ' + str(k) + ' ' + str(d1[k]) + ' [-]')
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logger.warning('cache> ' + str(k) + ' ' + str(d2[k]) + ' [+]')
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### DEPRECATED
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def readreal():
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""" read the current state and return its contents """
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try:
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with open('grid-real.json') as gridfile:
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grid_data = json.load(gridfile)
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gridfile.close()
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resulttime = grid_data['synctime']
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logger.info('grid> sync for ' + resulttime)
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except:
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grid_data = {}
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logger.error('cache> cannot read temp file')
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return grid_data
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def sync(cached=True):
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""" calls slave objects and mix their nodes in a common cluster grid """
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a = datetime.datetime.now()
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grid_vmid_min = config.get('general', 'vmid_min')
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grid_vmid_max = config.get('general', 'vmid_max')
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real_grid = {'name':'real', "vmid_min":grid_vmid_min, "vmid_max":grid_vmid_max }
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cache_grid = {'name':'cache', "vmid_min":grid_vmid_min, "vmid_max":grid_vmid_max }
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regionselector = [i for i, x in enumerate(config.sections()) if re.match(r'\W*' + 'region' + r'\W*', x)]
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for ri in range(len(regionselector)):
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region_section = config.sections()[int(regionselector[ri])]
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region_id = region_section.split("_")[1]
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region_name = config.get(region_section, 'name')
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region_range_min = config.get(region_section, 'ipv4_min')
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region_range_max = config.get(region_section, 'ipv4_max')
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slaveselector = [i for i, x in enumerate(config.sections()) if re.match(r'\W*' + 'slave' + r'\W*', x)]
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real_region = { "id":region_id, "region":region_name, "ipv4_min":region_range_min, "ipv4_max":region_range_max }
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cache_region = real_region.copy() #same region both in cache nad status
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for si in range(len(slaveselector)):
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slave_section = config.sections()[int(slaveselector[si])]
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slave_id = slave_section.split("_")[1]
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slave_name = config.get(slave_section, 'name')
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slave_masterip = config.get(slave_section, 'masterip')
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slave_password = config.get(slave_section, 'password')
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slave_regionid = config.get(slave_section, 'regionid')
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enc_slave_password = base64.b64encode(slave_password.encode('ascii')) #encode base64 in grid
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decoded_password = enc_slave_password.decode('ascii')
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real_slave = { "id":slave_id, "slave":slave_name, "masterip":slave_masterip, "password":decoded_password }
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optional_slave = {}
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cache_file = 'cache-slave-' + slave_id + '.json'
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prefix = 'slave[' + slave_name + ']> '
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# check if slave is in current region and include it in current dict if it is
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if slave_regionid == region_id:
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try:
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#trying to connect to slave host
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#vmlist = plugin.vmlist(slave_id, slave_masterip, enc_slave_password.decode('utf-8'))
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proxobject = plugin.auth(slave_id, slave_masterip, enc_slave_password)
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vmlist = plugin.vmlist(proxobject)
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real_slave['alive'] = 'up'
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logger.info(prefix + 'is online')
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except:
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#raise
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#slave cant be read so it will be marked down.
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real_slave['alive'] = 'down'
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logger.warning(prefix + 'is down')
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if real_slave['alive'] == 'up':
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#populate grid with vms then
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for vm in vmlist:
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#static parameters that CAN go to to cache:
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vm_id = vm['vmid']
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vm_name = vm['name']
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#vm_owner = clientsdb.vmowner(vm_id, vm_name, cached) #read clientsdb cache
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#static_vm = { "vmid":str(vm_id), "hostname":vm_name, 'type':vm['vmtype'], 'owner':vm_owner }
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static_vm = { "vmid":str(vm_id), "hostname":vm_name, 'type':vm['vmtype'] }
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real_slave[str(vm_id)] = static_vm
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#dynamic parameters that SHOULD NOT go to the cache:
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dynamic_vm = { "uptime":vm['uptime'] }
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optional_slave[str(vm_id)] = dynamic_vm
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#check current cache
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cache_slave = real_slave.copy() #fallback to the current state
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try:
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with open(cache_file) as fcr:
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cache_slave = json.load(fcr)
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fcr.close()
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except:
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logger.info(prefix + 'does not exist in cache. Initializing...')
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if cache_slave['alive'] == 'up':
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#slave was not down so it must be up...
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cache_slave = updatedb(real_slave, cache_file, prefix, 'up')
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logger.info(prefix + 'sync success o/')
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else:
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#if the slave was down before, compare the state before overwriting the cache
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cache_slave['alive'] = 'up' #even if alive status in cache is still down we ignore it by forcing it to up
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logger.info(prefix + 'was down')
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#show the differences in log for manual (or maybe automatic at some point fixing)
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findDiff(cache_slave, real_slave)
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if cache_slave != real_slave:
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logger.warning(prefix + 'cache != current status. please restore host!')
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cache_slave = updatedb(cache_slave, cache_file, prefix, 'down')
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else:
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logger.info(prefix + 'cache == current status. host restored. o/')
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cache_slave = updatedb(cache_slave, cache_file, prefix, 'up')
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#what to do with cache if host is down
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if real_slave['alive'] == 'down':
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try:
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logger.warning(prefix + 'loading cache...')
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with open(cache_file) as fscr:
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cache_slave = json.load(fscr)
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fscr.close()
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logger.warning(prefix + '...done')
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cache_slave = updatedb(cache_slave, cache_file, prefix, 'down')
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except:
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logger.error(prefix + 'sync failure!')
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cache_slave = real_slave.copy()
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#raise
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#we safely mix the dynamic ids now that we dont deal with cache anymore
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mergedslave = utils.dict_merge({}, real_slave, optional_slave)
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real_region[slave_id] = mergedslave
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cache_region[slave_id] = cache_slave
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#the region is finally included in the grid
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real_grid[region_id] = real_region
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cache_grid[region_id] = cache_region
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b = datetime.datetime.now()
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real_grid["synctime"] = str(b-a)
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#dump all data to json
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WriteCache(cache_grid, 'grid-cache.json')
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WriteCache(real_grid, 'grid-real.json')
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if cached == True:
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return cache_grid
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else:
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return real_grid
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if __name__ == '__main__':
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print(sync())
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#print(query_happiness(0))
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#print(generate_ipv4(0,3))
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#print(generate_vmid())
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print(query_vm(147344))
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