From 8120b2583c459c85116d69211038e0110d71e5b7 Mon Sep 17 00:00:00 2001 From: Harry Huang Date: Wed, 1 Nov 2017 15:05:30 +0800 Subject: Add compass-tasks Registered tasks and MQ modules for Compass Change-Id: Id1569a61fe53357d53448478d5ba42cb1f386bc6 Signed-off-by: Harry Huang --- compass-tasks/actions/health_check/check_dns.py | 139 ++++++++++++++++++++++++ 1 file changed, 139 insertions(+) create mode 100644 compass-tasks/actions/health_check/check_dns.py (limited to 'compass-tasks/actions/health_check/check_dns.py') diff --git a/compass-tasks/actions/health_check/check_dns.py b/compass-tasks/actions/health_check/check_dns.py new file mode 100644 index 0000000..843d7e2 --- /dev/null +++ b/compass-tasks/actions/health_check/check_dns.py @@ -0,0 +1,139 @@ +# 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 DNS service.""" + +import commands +import os +import socket +import xmlrpclib + +from compass.actions.health_check import base + + +class DnsCheck(base.BaseCheck): + """dns health check class.""" + NAME = "DNS Check" + + def run(self): + """do health check.""" + method_name = "self.check_" + self.os_installer['name'] + "_dns()" + return eval(method_name) + + def check_cobbler_dns(self): + """Checks if Cobbler has taken over DNS 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_dns'] == 0: + self.messages.append('[DNS]Info: DNS is not managed by Compass') + return (0, self.messages) + self.check_cobbler_dns_template() + print "[Done]" + self.check_dns_service() + print "[Done]" + if self.code == 1: + self.messages.append( + "[%s]Info: DNS health check has complated. " + "No problems found, all systems go." % self.NAME) + return (self.code, self.messages) + + def check_cobbler_dns_template(self): + """Validates Cobbler's DNS template file.""" + + print "Checking DNS template......", + if os.path.exists("/etc/cobbler/named.template"): + var_map = { + "match_port": False, + "match_allow_query": False, + } + named_template = open("/etc/cobbler/named.template") + host_ip = socket.gethostbyname(socket.gethostname()) + missing_query = [] + for line in named_template.readlines(): + if "listen-on port 53" in line and host_ip in line: + var_map["match_port"] = True + + if "allow-query" in line: + for subnet in ["127.0.0.0/8"]: + if subnet not in line: + missing_query.append(subnet) + + named_template.close() + + if var_map["match_port"] is False: + self.messages.append( + "[%s]Error: named service port " + "and/or IP is misconfigured in " + "/etc/cobbler/named.template" % self.NAME) + + if len(missing_query) != 0: + self.messages.append( + "[%s]Error: Missing allow_query values in " + "/etc/cobbler/named.template:%s" % ( + self.NAME, + ', '.join(subnet for subnet in missing_query))) + else: + var_map["match_allow_query"] = True + + 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: DNS template failed components: " + "%s" % ( + self.NAME, + ' '.join(failed for failed in fails))) + + else: + self._set_status( + 0, + "[%s]Error: named template file doesn't exist, " + "health check failed." % self.NAME) + + return True + + def check_dns_service(self): + """Checks if DNS is running on port 53.""" + + print "Checking DNS service......", + if 'named' not in commands.getoutput('ps -ef'): + self._set_status( + 0, + "[%s]Error: named service does not seem to be " + "running" % self.NAME) + + if socket.getservbyport(53) != 'domain': + self._set_status( + 0, + "[%s]Error: domain service is not listening on port " + "53" % self.NAME) + + return None -- cgit 1.2.3-korg