def test_netns_check_dns(self):
# Find nameserver address and use it
fd = open('/etc/resolv.conf','r')
self.nameserver_ip = None
for elem in fd.readlines():
match = re.match('nameserver\s+(\S+)',elem)
if match:
logger.debug("Nameserver IP is {}" .format(match.group(1)))
self.nameserver_ip = match.group(1)
if self.nameserver_ip:
fake_nameserver = "nameserver "+ self.nameserver_ip + "\n"
else:
fake_nameserver = "nameserver 1.1.1.1\n"
new_resolvconf_hdl = tempfile.NamedTemporaryFile(delete=False)
new_resolvconf_hdl_path = new_resolvconf_hdl.name
new_resolvconf_hdl.write(fake_nameserver)
new_resolvconf_hdl.close()
logger.debug("Temp file name is :{}".format(new_resolvconf_hdl_path))
RwNetns.mount_bind_resolv_conf(new_resolvconf_hdl_path)
a = urllib2.urlopen("http://www.google.com", timeout=1)
self.assertEqual(a.getcode(),200)
logger.debug("URL return code is :{}".format(a.getcode()))
os.remove(new_resolvconf_hdl_path)
def test_netns_check_dns(self):
# Find nameserver address and use it
fd = open('/etc/resolv.conf', 'r')
self.nameserver_ip = None
for elem in fd.readlines():
match = re.match('nameserver\s+(\S+)', elem)
if match:
logger.debug("Nameserver IP is {}".format(match.group(1)))
self.nameserver_ip = match.group(1)
if self.nameserver_ip:
fake_nameserver = "nameserver " + self.nameserver_ip + "\n"
else:
fake_nameserver = "nameserver 1.1.1.1\n"
new_resolvconf_hdl = tempfile.NamedTemporaryFile(delete=False)
new_resolvconf_hdl_path = new_resolvconf_hdl.name
new_resolvconf_hdl.write(fake_nameserver)
new_resolvconf_hdl.close()
logger.debug("Temp file name is :{}".format(new_resolvconf_hdl_path))
RwNetns.mount_bind_resolv_conf(new_resolvconf_hdl_path)
a = urllib2.urlopen("http://www.google.com", timeout=1)
self.assertEqual(a.getcode(), 200)
logger.debug("URL return code is :{}".format(a.getcode()))
os.remove(new_resolvconf_hdl_path)
def _mount_resolv_conf(self):
if not os.path.isfile(self.resolv_conf_path):
self._log_event(MissingResolvConf())
raise NetworkNamespaceException("Network namespace resolv.conf file does not exist: %s"
% self.resolv_conf_path)
with open(self.resolv_conf_path) as resolv_conf_hdl:
self._log_event(MountingResolvConf(), content=resolv_conf_hdl.read())
bind_rc = RwNetns.mount_bind_resolv_conf(self.resolv_conf_path)
if bind_rc != 0:
self._log_event(MountingResolvConfFailed, rc=bind_rc)
raise NetworkNamespaceException("Could not mount netns resolv conf (%s). rc=%s"
% (self.resolv_conf_path, bind_rc))
def _mount_resolv_conf(self):
if not os.path.isfile(self.resolv_conf_path):
self._log_event(MissingResolvConf())
raise NetworkNamespaceException(
"Network namespace resolv.conf file does not exist: %s" %
self.resolv_conf_path)
with open(self.resolv_conf_path) as resolv_conf_hdl:
self._log_event(MountingResolvConf(),
content=resolv_conf_hdl.read())
bind_rc = RwNetns.mount_bind_resolv_conf(self.resolv_conf_path)
if bind_rc != 0:
self._log_event(MountingResolvConfFailed, rc=bind_rc)
raise NetworkNamespaceException(
"Could not mount netns resolv conf (%s). rc=%s" %
(self.resolv_conf_path, bind_rc))
