mirror of
https://github.com/apache/cloudstack.git
synced 2025-10-26 08:42:29 +01:00
8e538028b2
Best practice is to have one blank line at the end of Python files. Remove unneeded blank lines from the end of files
123 lines
3.5 KiB
Python
123 lines
3.5 KiB
Python
#!/usr/bin/python
|
|
# Licensed to the Apache Software Foundation (ASF) under one
|
|
# or more contributor license agreements. See the NOTICE file
|
|
# distributed with this work for additional information
|
|
# regarding copyright ownership. The ASF licenses this file
|
|
# to you under the Apache License, Version 2.0 (the
|
|
# "License"); you may not use this file except in compliance
|
|
# with the License. You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing,
|
|
# software distributed under the License is distributed on an
|
|
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
# KIND, either express or implied. See the License for the
|
|
# specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
|
|
# Usage: dhcpd_edithosts.py mac ip hostname dns gateway nextserver
|
|
import sys, os
|
|
from os.path import exists
|
|
from time import sleep
|
|
from os import remove
|
|
|
|
usage = '''dhcpd_edithosts.py mac ip hostname dns gateway nextserver'''
|
|
conf_path = "/etc/dhcpd.conf"
|
|
file_lock = "/etc/dhcpd.conf_locked"
|
|
sleep_max = 20
|
|
host_entry = 'host %s { hardware ethernet %s; fixed-address %s; option domain-name-servers %s; option domain-name "%s"; option routers %s; default-lease-time infinite; max-lease-time infinite; min-lease-time infinite; filename "pxelinux.0";}'
|
|
host_entry1 = 'host %s { hardware ethernet %s; fixed-address %s; option domain-name-servers %s; option domain-name "%s"; option routers %s; default-lease-time infinite; max-lease-time infinite; min-lease-time infinite; next-server %s; filename "pxelinux.0";}'
|
|
def lock():
|
|
if exists(file_lock):
|
|
count = 0
|
|
while(exists(file_lock)):
|
|
sleep(1)
|
|
count = count + 1
|
|
if count > sleep_max:
|
|
print "Can not get file lock at %s, time expired" % file_lock
|
|
return False
|
|
|
|
try:
|
|
f = open(file_lock, "w")
|
|
f.close()
|
|
return True
|
|
except IOError,e:
|
|
print "Cannot create file lock at /etc/dhcpd.conf_locked,", e
|
|
return False
|
|
|
|
|
|
def unlock():
|
|
if exists(file_lock) == False:
|
|
print "Cannot find %s when unlocking, race condition happens" % file_lock
|
|
else:
|
|
try:
|
|
remove(file_lock)
|
|
return True
|
|
except IOError, e:
|
|
print "Cannot remove file lock at %s" % file_lock
|
|
return False
|
|
|
|
def insert_host_entry(mac, ip, hostname, dns, gateway, next_server):
|
|
if lock() == False:
|
|
return 1
|
|
|
|
cmd = 'sed -i /"fixed-address %s"/d %s' % (ip, conf_path)
|
|
ret = os.system(cmd)
|
|
if ret != 0:
|
|
print "Command %s failed" % cmd
|
|
unlock()
|
|
return 1
|
|
|
|
cmd = 'sed -i /"hardware ethernet %s"/d %s' % (mac, conf_path)
|
|
ret = os.system(cmd)
|
|
if ret != 0:
|
|
print "Command %s failed" % cmd
|
|
unlock()
|
|
return 1
|
|
|
|
if next_server != "null":
|
|
entry = host_entry1 % (hostname, mac, ip, dns, "cloudnine.internal", gateway, next_server)
|
|
else:
|
|
entry = host_entry % (hostname, mac, ip, dns, "cloudnine.internal", gateway)
|
|
cmd = '''echo '%s' >> %s''' % (entry, conf_path)
|
|
ret = os.system(cmd)
|
|
if ret != 0:
|
|
print "Command %s failed" % cmd
|
|
unlock()
|
|
return 1
|
|
|
|
cmd = 'service dhcpd restart'
|
|
ret = os.system(cmd)
|
|
if ret != 0:
|
|
print "Command %s failed" % cmd
|
|
unlock()
|
|
return 1
|
|
|
|
if unlock() == False:
|
|
return 1
|
|
|
|
return 0
|
|
|
|
if __name__ == "__main__":
|
|
if len(sys.argv) < 7:
|
|
print usage
|
|
sys.exit(1)
|
|
|
|
mac = sys.argv[1]
|
|
ip = sys.argv[2]
|
|
hostname = sys.argv[3]
|
|
dns = sys.argv[4]
|
|
gateway = sys.argv[5]
|
|
next_server = sys.argv[6]
|
|
|
|
if exists(conf_path) == False:
|
|
conf_path = "/etc/dhcp/dhcpd.conf"
|
|
if exists(conf_path) == False:
|
|
print "Cannot find dhcpd.conf"
|
|
sys.exit(1)
|
|
|
|
ret = insert_host_entry(mac, ip, hostname, dns, gateway, next_server)
|
|
sys.exit(ret)
|