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-rw-r--r--compass-tasks/actions/health_check/check_dhcp.py184
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diff --git a/compass-tasks/actions/health_check/check_dhcp.py b/compass-tasks/actions/health_check/check_dhcp.py
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+# Copyright 2014 Huawei Technologies Co. Ltd
+#
+# Licensed 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.
+
+"""Health Check module for DHCP service."""
+import commands
+import os
+import re
+import socket
+import xmlrpclib
+
+from compass.actions.health_check import base
+
+
+class DhcpCheck(base.BaseCheck):
+ """dhcp health check class."""
+
+ NAME = "DHCP Check"
+
+ def run(self):
+ """do health check."""
+ method_name = "self.check_" + self.os_installer['name'] + "_dhcp()"
+ return eval(method_name)
+
+ def check_cobbler_dhcp(self):
+ """Checks if Cobbler has taken over DHCP service."""
+
+ try:
+ remote = xmlrpclib.Server(
+ self.os_installer['cobbler_url'],
+ allow_none=True)
+ credentials = self.os_installer['credentials']
+ remote.login(
+ credentials['username'], credentials['password'])
+ except Exception:
+ self._set_status(
+ 0,
+ "[%s]Error: Cannot login to Cobbler with "
+ "the tokens provided in the config file" % self.NAME)
+ return (self.code, self.messages)
+
+ cobbler_settings = remote.get_settings()
+ if cobbler_settings['manage_dhcp'] == 0:
+ self.messages.append(
+ "[%s]Info: DHCP service is "
+ "not managed by Compass" % self.NAME)
+ self.code = 0
+ return (self.code, self.messages)
+
+ self.check_cobbler_dhcp_template()
+ print "[Done]"
+ self.check_dhcp_service()
+ self.check_dhcp_netmask()
+ print "[Done]"
+ if self.code == 1:
+ self.messages.append(
+ "[%s]Info: DHCP health check has completed. "
+ "No problems found, all systems go." % self.NAME)
+
+ return (self.code, self.messages)
+
+ def check_cobbler_dhcp_template(self):
+ """Validates Cobbler's DHCP template file."""
+ print "Checking DHCP template......",
+ if os.path.exists("/etc/cobbler/dhcp.template"):
+ var_map = {
+ "match_next_server": False,
+ "match_subnet": False,
+ "match_filename": False,
+ "match_range": False,
+ }
+
+ ip_regex = re.compile(r'^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$')
+
+ dhcp_template = open("/etc/cobbler/dhcp.template")
+ for line in dhcp_template.readlines():
+ if line.find("next_server") != -1:
+ elmlist = line.split(" ")
+ for elm in elmlist:
+ if ";" in elm:
+ elm = elm[:-2]
+
+ if "$next_server" in elm or ip_regex.match(elm):
+ var_map["match_next_server"] = True
+
+ elif line.find("subnet") != -1 and line.find("{") != -1:
+ elmlist = line.split(" ")
+ for elm in elmlist:
+ if ip_regex.match(elm):
+ if elm[-1] == "0" and "255" not in elm:
+ var_map["match_subnet"] = True
+ elif elm[-1] != "0":
+ self.messages.append(
+ "[%s]Error: Subnet should be set "
+ "in the form of 192.168.0.0 in"
+ "/etc/cobbler/dhcp.template" % self.NAME)
+
+ elif line.find("filename") != -1:
+ var_map["match_filename"] = True
+ elif line.find("range dynamic-bootp") != -1:
+ elmlist = line.split(" ")
+ ip_count = 0
+ for elm in elmlist:
+ if ";" in elm and "\n" in elm:
+ elm = elm[:-2]
+
+ if ip_regex.match(elm):
+ ip_count += 1
+
+ if ip_count != 2:
+ self.messages.append(
+ "[%s]Error: DHCP range should be set "
+ "between two IP addresses in "
+ "/etc/cobbler/dhcp.template" % self.NAME)
+ else:
+ var_map["match_range"] = True
+
+ dhcp_template.close()
+ fails = []
+ for var in var_map.keys():
+ if var_map[var] is False:
+ fails.append(var)
+
+ if len(fails) != 0:
+ self._set_status(
+ 0,
+ "[%s]Info: DHCP template file "
+ "failed components: %s" % (
+ self.NAME, ' '.join(failed for failed in fails)))
+
+ else:
+ self._set_status(
+ 0,
+ "[%s]Error: DHCP template file doesn't exist, "
+ "health check failed." % self.NAME)
+
+ return True
+
+ def check_dhcp_netmask(self):
+ with open('/etc/dhcp/dhcpd.conf') as conf_reader:
+ lines = conf_reader.readlines()
+ for line in lines:
+ if re.search('^subnet', line):
+ elm_list = line.split(' ')
+ break
+ subnet_ip = elm_list[1]
+ netmask = elm_list[-2]
+ subnet_ip_elm = subnet_ip.split('.')
+ netmask_elm = netmask.split('.')
+ for index, digit in enumerate(subnet_ip_elm):
+ if int(digit) & int(netmask_elm[index]) != int(digit):
+ self._set_status(
+ 0,
+ "[%s]Info: DHCP subnet IP and "
+ "netmask do not match" % self.NAME)
+ break
+ return True
+
+ def check_dhcp_service(self):
+ """Checks if DHCP is running on port 67."""
+ print "Checking DHCP service......",
+ if not commands.getoutput('pgrep dhcp'):
+ self._set_status(
+ 0,
+ "[%s]Error: dhcp service does not "
+ "seem to be running" % self.NAME)
+
+ if socket.getservbyport(67) != 'bootps':
+ self._set_status(
+ 0,
+ "[%s]Error: bootps is not listening "
+ "on port 67" % self.NAME)
+
+ return True