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"""
Created on 2015-7-13
@author: y00228926
"""
import os
import time
import logging
import subprocess
import sys
import constant
from utils import IPCommandHelper, umount, check_and_rmmod, check_output, check_call, call
LOG_FILE = '/tmp/fsmonitor.log'
PID_FILE = '/tmp/fsmonitor.pid'
LOG = logging.getLogger('__name__')
class VMOperation(object):
def __init__(self):
self.RTE_SDK = '/home/dpdk-2.0.0'
self.RTE_TARGET = 'x86_64-native-linuxapp-gcc'
self.nr_hugepages = '512'
self.pid = 0
self.ip_helper = IPCommandHelper()
def config_ip(self, mac, ip):
device = self.ip_helper.mac_device_map[mac]
check_call("ifconfig %s %s up" % (device, ip), shell=True)
def config_gw(self, ip):
call("route del default", shell=True)
check_call("route add default gw %s" % ip, shell=True)
def recover_nic_binding(self, *tap_macs):
if self.pid:
os.kill(self.pid, 9)
self.pid = None
bdf_str = ''
for mac in tap_macs:
bdf = self.ip_helper.mac_bdf_map[mac]
bdf_str = bdf_str + ' ' + bdf
cmd = 'python %s/tools/dpdk_nic_bind.py --bind=virtio-pci %s' % (self.RTE_SDK, bdf_str)
LOG.debug("recover_nic_binding runs cmd = %s", cmd)
check_call(cmd, shell=True)
def set_pktloop_dpdk(self, *tap_macs):
RTE_SDK = self.RTE_SDK
RTE_TARGET = self.RTE_TARGET
umount("/mnt/huge")
with open('/sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages', 'w') as f:
f.write(self.nr_hugepages)
check_call("mkdir -p /mnt/huge", shell=True)
check_call("mount -t hugetlbfs nodev /mnt/huge", shell=True)
check_call("modprobe uio", shell=True)
check_and_rmmod('igb_uio')
check_call("insmod %s/%s/kmod/igb_uio.ko" % (RTE_SDK, RTE_TARGET), shell=True)
bdf_str = ''
for mac in tap_macs:
bdf = self.ip_helper.mac_bdf_map[mac]
bdf_str = bdf_str + ' ' + bdf
check_call('python %s/tools/dpdk_nic_bind.py --bind=igb_uio %s' % (RTE_SDK, bdf_str), shell=True)
cpu_num = int(check_output('cat /proc/cpuinfo | grep processor | wc -l', shell=True))
cpu_bit_mask = 0
i = cpu_num
while i:
cpu_bit_mask = (cpu_bit_mask << 1) + 1
i -= 1
cpu_bit_mask = hex(cpu_bit_mask)
cmd = "%s/%s/app/testpmd -c %s -n %d -- --disable-hw-vlan --disable-rss --nb-cores=%d --rxq=%d --txq=%d --rxd=4096 --txd=4096" % (
RTE_SDK,
RTE_TARGET,
cpu_bit_mask,
cpu_num / 2,
cpu_num - 1,
(cpu_num - 1) / 2,
(cpu_num - 1) / 2
)
LOG.info("set_pktloop_dpdk runs cmd = %s", cmd)
p = subprocess.Popen(cmd.split())
if not p.poll():
self.pid = p.pid
return True
else:
raise Exception("start testpmd failed")
def config_amqp(self, file_name):
if not os.path.isfile(file_name):
raise Exception("file: %s not exists." % file_name)
check_call("cp %s /etc/vstf/amqp/amqp.ini" % file_name, shell=True)
check_call("vstf-agent restart", shell=True)
return True
def stop_vstf(self):
check_call("vstf-agent stop", shell=True)
return True
class FSMonitor(object):
def __init__(self, pidfile=None, interval=1):
if pidfile:
self.pidfile = pidfile
else:
self.pidfile = PID_FILE
self.interval = interval
self.handlers = []
self.kill_old()
umount(constant.FS_MOUNT_POINT)
check_call("mkdir -p %s" % constant.FS_MOUNT_POINT, shell=True)
check_call("mount -t 9p 9pfs %s" % constant.FS_MOUNT_POINT, shell=True)
os.chdir(constant.FS_MOUNT_POINT)
with open(constant.VM_UP_Flag_FILE, 'w'):
pass
def kill_old(self):
out = check_output("ps -ef | grep -v grep | egrep 'python.*%s' | awk '{print $2}'" % sys.argv[0],
shell=True)
if out:
for pid in out.split():
if int(pid) != os.getpid():
os.kill(int(pid), 9)
LOG.debug("found daemon:pid=%s and kill.", pid)
def set_fail(self, failed_reason):
with open(constant.VM_CMD_RETURN_CODE_FILE, 'w') as f:
f.writelines([constant.VM_CMD_EXCUTE_FAILED_FLAG_CONTENT, '\n', failed_reason])
with open(constant.VM_CMD_DONE_FLAG_FILE, 'w') as f:
pass
def set_success(self):
with open(constant.VM_CMD_RETURN_CODE_FILE, 'w') as f:
f.write(constant.VM_CMD_EXCUTE_SUCCES_FLAG_CONTENT)
with open(constant.VM_CMD_DONE_FLAG_FILE, 'w') as f:
pass
def register_handler(self, obj):
self.handlers.append(obj)
def daemonize(self):
try:
pid = os.fork()
if pid > 0:
sys.exit(0)
except OSError, e:
sys.stderr.write('fork #1 failed:%d,(%s)\n' % (e.errno, e.strerror))
sys.exit(1)
os.setsid()
os.umask(0)
try:
pid = os.fork()
if pid > 0:
sys.exit(0)
except OSError, e:
sys.stderr.write('fork #2 failed:%d,(%s)\n' % (e.errno, e.strerror))
sys.exit(1)
LOG.debug("pid:%d,ppid:%d,sid:%d", os.getpid(), os.getppid(), os.getsid(os.getpid()))
old = open('/dev/null', 'r')
os.dup2(old.fileno(), sys.stdin.fileno())
old = open('/dev/null', 'a+')
os.dup2(old.fileno(), sys.stdout.fileno())
old = open('/dev/null', 'a+', 0)
os.dup2(old.fileno(), sys.stderr.fileno())
pid = str(os.getpid())
file(self.pidfile, 'w+').write('%s\n' % pid)
def run_forever(self):
# todo:resolve handlers name space conflict
self.daemonize()
while True:
time.sleep(self.interval)
files = os.listdir(constant.FS_MOUNT_POINT)
if constant.VM_CMD_SET_FLAG_FILE in files and constant.VM_CMD_CONTENT_FILE in files:
with open(constant.VM_CMD_CONTENT_FILE, 'r') as f:
out = f.read().strip()
LOG.debug("new command arrived:%s", out)
cmd_param = out.split()
cmd = cmd_param[0]
param = cmd_param[1:]
for obj in self.handlers:
if hasattr(obj, cmd) and callable(getattr(obj, cmd)):
LOG.debug("method:%s found!", cmd)
method = getattr(obj, cmd)
try:
method(*param)
self.set_success()
LOG.debug("cmd sucessfully done")
except Exception, e:
LOG.debug('failed to run:%s %s,reason:%s', cmd, param, str(e))
self.set_fail(str(e))
break
else:
LOG.debug("method:%s not found!", cmd)
self.set_fail(constant.VM_CMD_NOT_FOUND)
os.remove(constant.VM_CMD_SET_FLAG_FILE)
os.remove(constant.VM_CMD_CONTENT_FILE)
if __name__ == '__main__':
# echo "set_pktloop_dpdk" > command;touch command_set
# echo "recover_nic_binding" > command;touch command_set
# echo "config_ip 56:6f:44:a5:3f:a2 192.168.188.200/23" > command;touch command_set
# echo "config_gw 192.168.188.1" > command;touch command_set
# echo set_pktloop_dpdk 56:6f:44:a5:3f:a2 56:6f:44:a5:3f:a3 > command;touch command_set
# echo recover_nic_binding 56:6f:44:a5:3f:a2 56:6f:44:a5:3f:a3 > command;touch command_set
import os
logging.basicConfig(level=logging.DEBUG, filename=LOG_FILE, filemode='w')
os.environ['PATH'] = os.environ["PATH"] + ":/usr/local/bin"
LOG.info(os.environ['PATH'])
vm_op = VMOperation()
agent = FSMonitor()
agent.register_handler(vm_op)
agent.run_forever()
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