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vps_mgr.py
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vps_mgr.py
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#!/usr/bin/env python
#coding:utf-8
import sys
import os
import conf
import saas.const.vps as vps_const
from saas import VPS
from saas.ttypes import Cmd
from zthrift.client import get_client
from zkit.ip import int2ip
from ops.vps import XenVPS
from ops.vps_ops import VPSOps
from lib.log import Log
import ops.vps_common as vps_common
from ops.xen import get_xen_inf
import time
import re
import lib.daemon as daemon
import signal
import threading
from lib.timer_events import TimerEvents
import ops.netflow as netflow
from saas.ttypes import NetFlow
class VPSMgr (object):
""" all exception should catch and log in this class """
VERSION = 1
def __init__ (self):
self.logger = Log ("vps_mgr", config=conf)
self.logger_err = Log ("vps_mgr_err", config=conf)
self.logger_misc = Log ("misc", config=conf)
self.host_id = conf.HOST_ID
self.handlers = {
Cmd.OPEN: self.__class__.vps_open,
Cmd.REBOOT: self.__class__.vps_reboot,
Cmd.CLOSE: self.__class__.vps_close,
Cmd.OS: self.__class__.vps_reinstall_os,
}
self.timer = TimerEvents (time.time, self.logger_misc)
assert conf.NETFLOW_COLLECT_INV > 0
self.timer.add_timer (conf.NETFLOW_COLLECT_INV, self.send_netflow)
self.timer.add_timer (12 * 3600, self.refresh_host_space)
self.workers = []
self.running = False
def get_client (self):
return get_client (VPS)
def send_netflow (self):
result = None
try:
result = netflow.read_proc ()
except Exception, e:
self.logger_misc.exception ("cannot read netflow data from proc: %s" % (str(e)))
return
ts = time.time ()
netflow_list = list ()
try:
for ifname, v in result.iteritems ():
om = re.match ("^vps(\d+)$", ifname)
if not om:
continue
vps_id = int(om.group (1))
if vps_id <= 0:
continue
# direction of vps bridged network interface needs to be reversed
netflow_list.append (NetFlow (vps_id, rx=v[1], tx=v[0]))
except Exception, e:
self.logger_misc.exception ("netflow data format error: %s" % (str(e)))
return
if not netflow_list:
self.logger_misc.info ("no netflow data is to be sent")
return
trans, client = self.get_client ()
try:
trans.open ()
try:
client.netflow_save (self.host_id, netflow_list, ts)
self.logger_misc.info ("netflow data sent")
finally:
trans.close ()
except Exception, e:
self.logger_misc.exception ("cannot send netflow data: %s" % (str(e)))
def run_once (self, cmd):
vps_id = None
vps = None
try:
trans, client = self.get_client ()
trans.open ()
try:
vps_id = client.todo (self.host_id, cmd)
print cmd, vps_id
if vps_id > 0:
vps = client.vps (vps_id)
if not self.vps_is_valid (vps):
self.logger.error ("invalid vps data received, cmd=%s, vps_id=%s" % (cmd, vps_id))
self.done_task(cmd, vps_id, False, "invalid data")
vps = None
finally:
trans.close ()
except Exception, e:
self.logger_err.exception (e)
return False
if not vps:
return False
h = self.handlers.get (cmd)
if callable (h):
try:
h (self, vps)
return True
except Exception, e:
self.logger_err.exception ("vps %s, uncaught exception: %s" % (vps.id, str(e)))
#TODO notify maintainments
return False
else:
self.logger.warn ("no handler for cmd %s, vps: %s" % (str(cmd), self.dump_vps_info(vps)))
self.done_task (cmd, vps_id, False, "not implemented")
return False
def run_loop (self, cmd):
self.logger.info ("worker for %s started" % (str(cmd)))
while self.running:
try:
if self.run_once (cmd):
continue
except Exception, e:
self.logger_err.exception ("uncaught exception: " + str(e))
time.sleep (2)
self.logger.info ("worker for %s stop" % (str(cmd)))
def done_task (self, cmd, vps_id, is_ok, msg=''):
state = 0
if not is_ok:
state = 1
try:
trans, client = self.get_client ()
trans.open ()
try:
self.logger.info ("send done_task cmd=%s vps_id=%s" % (str(cmd), str(vps_id)))
client.done (self.host_id, cmd, vps_id, state, msg)
finally:
trans.close ()
except Exception, e:
self.logger_err.exception (e)
@staticmethod
def vps_is_valid (vps):
return vps is not None and vps.id > 0
@staticmethod
def dump_vps_info (vps):
ip = vps.ipv4 is not None and int2ip (vps.ipv4) or None
ip_inter = vps.ipv4_inter is not None and int2ip (vps.ipv4_inter) or None
netmask = vps.ipv4_netmask is not None and int2ip (vps.ipv4_netmask) or None
gateway = vps.ipv4_gateway is not None and int2ip (vps.ipv4_gateway) or None
if vps.state is not None:
state = "%s(%s)" % (vps.state, vps_const.VPS_STATE2CN[vps.state])
else:
state = None
return "host_id %s, id %s, state %s, os %s, cpu %s, ram %sM, hd %sG, ip %s, netmask %s, gateway %s, inter_ip:%s, bandwidth:%s" % (
vps.host_id, vps.id, state,
vps.os, vps.cpu, vps.ram, vps.hd,
ip, netmask, gateway, ip_inter, vps.bandwidth,
)
def setup_vps (self, xenvps, vps):
xenvps.setup (os_id=vps.os, vcpu=vps.cpu, mem_m=vps.ram, disk_g=vps.hd, root_pw=vps.password,
ip=int2ip (vps.ipv4),
netmask=int2ip (vps.ipv4_netmask),
gateway=int2ip (vps.ipv4_gateway),
)
def vps_open (self, vps, vps_image=None, is_new=True):
self.logger.info ("to open vps %s" % (vps.id))
if vps.host_id != self.host_id:
msg = "vpsopen : vps %s host_id=%s != current host %s , abort" % (vps.id, vps.host_id, self.host_id)
self.logger.error (msg)
self.done_task (Cmd.OPEN, vps.id, False, msg)
return
if not vps.ipv4 or not vps.ipv4_gateway or vps.cpu <= 0 or vps.ram <= 0 or vps.hd <= 0 or not vps.password:
self.logger.error ("vps open: invalid vps data received: %s" % (self.dump_vps_info (vps)))
self.done_task (Cmd.OPEN, vps.id, False, "invalid vps data")
return
xv = XenVPS (vps.id)
vpsops = VPSOps (self.logger)
try:
self.setup_vps (xv, vps)
if xv.is_running ():
msg = "vps %s is running" % (vps.id)
self.logger_err.error (msg)
self.done_task (Cmd.OPEN, vps.id, False, msg)
return
if vps.state in [vps_const.VPS_STATE_PAY, vps_const.VPS_STATE_RUN]:
vpsops.create_vps (xv, vps_image, is_new)
elif vps.state == vps_const.VPS_STATE_CLOSE:
vpsops.reopen_vps (vps.id, xv)
else:
msg = "vps%s state is %s(%s)" % (str(vps.id), vps.state, vps_const.VPS_STATE2CN[vps.state])
self.logger_err.error (msg)
self.done_task (Cmd.OPEN, vps.id, False, msg)
return
except Exception, e:
self.logger_err.exception ("for %s: %s" % (str(vps.id), str(e)))
self.done_task (Cmd.OPEN, vps.id, False, "error, " + str(e))
return
self.done_task (Cmd.OPEN, vps.id, True)
return True
def vps_reinstall_os (self, vps):
self.logger.info ("to reinstall vps %s, os=%s" % (vps.id, vps.os))
if vps.host_id != self.host_id:
msg = "vps reinstall_os : vps %s host_id=%s != current host %s , abort" % (vps.id, vps.host_id, self.host_id)
self.logger.error (msg)
self.done_task (Cmd.OS, vps.id, False, msg)
return
return self._reinstall_os (vps.id, vps)
def _reinstall_os (self, vps_id, _vps=None, os_id=None, vps_image=None):
try:
vpsops = VPSOps (self.logger)
xv = None
if _vps:
xv = XenVPS (_vps.id)
self.setup_vps (xv, _vps)
vpsops.reinstall_os (vps_id, xv, os_id, vps_image)
if _vps:
self.done_task (Cmd.OS, vps_id, True)
return True
except Exception, e:
self.logger_err.exception ("for %s: %s" % (str(vps_id), str(e)))
if _vps:
self.done_task (Cmd.OS, vps_id, False, "error," +str(e))
return False
def vps_reboot (self, vps):
xv = XenVPS (vps.id)
self.logger.info ("to reboot vps %s" % (vps.id))
vpsops = VPSOps (self.logger)
try:
self.setup_vps (xv, vps)
vpsops.reboot_vps (xv)
except Exception, e:
self.logger_err.exception (e)
self.done_task (Cmd.REBOOT, vps.id, False, "exception %s" % (str(e)))
return
self.done_task (Cmd.REBOOT, vps.id, True)
return True
def modify_vif_rate (self, vps):
xv = XenVPS (vps.id)
vpsops = VPSOps (self.logger)
self.logger.info ("to modify vif rate for vps %s" % (vps.id))
try:
self.setup_vps (xv, vps)
vpsops.create_xen_config (vps)
except Exception, e:
self.logger_err.exception (e)
self.done_task (Cmd.BANDWIDTH, vps.id, False, "exception %s" % (str(e)))
return
self.done_task (Cmd.BANDWIDTH, vps.id, True)
return True
def query_vps (self, vps_id):
trans, client = self.get_client ()
trans.open ()
vps = None
try:
vps = client.vps (vps_id)
finally:
trans.close ()
if VPSMgr.vps_is_valid (vps):
return vps
return None
def refresh_host_space (self):
if not conf.USE_LVM:
return
try:
extra = 0
if "LVM_VG_MIN_SPACE" in dir(conf) and conf.LVM_VG_MIN_SPACE:
extra = int(conf.LVM_VG_MIN_SPACE)
disk_remain = vps_common.vg_free_space (conf.VPS_LVM_VGNAME) # in g
disk_remain -= extra
if disk_remain < 0:
disk_remain = 0
xen_inf = get_xen_inf ()
mem_remain = xen_inf.mem_free () # in m
trans, client = self.get_client ()
trans.open ()
try:
client.host_refresh (self.host_id, disk_remain, mem_remain)
finally:
trans.close ()
self.logger.info ("send host remain disk:%dG, mem:%dM" % (disk_remain, mem_remain))
except Exception, e:
self.logger_err.exception (e)
def _vps_delete (self, vps_id, vps=None):
try:
vpsops = VPSOps (self.logger)
xv = None
if vps:
xv = XenVPS (vps_id)
self.setup_vps (xv, vps)
vpsops.delete_vps (vps_id, xv)
except Exception, e:
self.logger_err.exception (e)
raise e
def vps_close (self, vps):
try:
assert vps.state == vps_const.VPS_STATE_CLOSE
vpsops = VPSOps (self.logger)
xv = XenVPS (vps.id)
self.setup_vps (xv, vps)
vpsops.close_vps (vps.id, xv)
except Exception, e:
self.logger_err.exception (e)
self.done_task (Cmd.CLOSE, vps.id, False, "exception %s" % (str(e)))
return
self.done_task (Cmd.CLOSE, vps.id, True)
return True
def loop (self):
while self.running:
time.sleep (1)
self.timer.stop ()
self.logger.info ("timer stopped")
while self.workers:
th = self.workers.pop (0)
th.join ()
self.logger.info ("all stopped")
def start (self):
if self.running:
return
self.running = True
for cmd in self.handlers.keys ():
th = threading.Thread (target=self.run_loop, args=(cmd, ))
try:
th.setDaemon (1)
th.start ()
self.workers.append (th)
except Exception, e:
self.logger_err.info ("failed to start worker for cmd %s, %s" % (str(cmd), str(e)))
self.timer.start ()
self.logger.info ("timer started")
def stop (self):
if not self.running:
return
self.running = False
self.logger.info ("stopping client")
def usage ():
print "usage:\t%s star/stop/restart\t#manage forked daemon" % (sys.argv[0])
print "\t%s run\t\t# run without daemon, for test purpose" % (sys.argv[0])
os._exit (1)
stop_signal_flag = False
def _main():
client = VPSMgr ()
def exit_sig_handler (sig_num, frm):
global stop_signal_flag
if stop_signal_flag:
return
stop_signal_flag = True
client.stop ()
return
client.start ()
signal.signal (signal.SIGTERM, exit_sig_handler)
signal.signal (signal.SIGINT, exit_sig_handler)
client.loop ()
return
if __name__ == "__main__":
if len (sys.argv) <= 1:
usage ()
else:
log_dir = conf.log_dir
if not os.path.exists (log_dir):
os.makedirs (log_dir, 0700)
run_dir = conf.RUN_DIR
if not os.path.exists (run_dir):
os.makedirs (run_dir, 0700)
logger = Log ("vps_mgr", config=conf) # to ensure log is permitted to write
os.chdir (run_dir)
pid_file = "vps_mgr.pid"
mon_pid_file = "vps_mgr_mon.pid"
def _log_err (msg):
print msg
logger.error (msg, bt_level=1)
def _start ():
daemon.start (_main, pid_file, mon_pid_file, _log_err)
def _stop ():
daemon.stop (signal.SIGTERM, pid_file, mon_pid_file)
action = sys.argv[1]
if action == "start":
_start ()
elif action == "stop":
_stop ()
elif action == "restart":
_stop ()
time.sleep (2)
_start ()
elif action == "status":
daemon.status (pid_file, mon_pid_file)
elif action == "run":
_main ()
else:
usage ()