def do_axfr(zone_name, servers, timeout=None, source=None):
"""
Requests an AXFR for a given zone name and process the response
:returns: Zone instance from dnspython
"""
random.shuffle(servers)
timeout = timeout or cfg.CONF["service:mdns"].xfr_timeout
xfr = None
for srv in servers:
to = eventlet.Timeout(timeout)
log_info = {'name': zone_name, 'host': srv}
try:
LOG.info("Doing AXFR for %(name)s from %(host)s", log_info)
xfr = dns.query.xfr(srv['host'],
zone_name,
relativize=False,
timeout=1,
port=srv['port'],
source=source)
raw_zone = dns.zone.from_xfr(xfr, relativize=False)
break
except eventlet.Timeout as t:
if t == to:
LOG.error("AXFR timed out for %(name)s from %(host)s",
log_info)
continue
except dns.exception.FormError:
LOG.error(
"Zone %(name)s is not present on %(host)s."
"Trying next server.", log_info)
except socket.error:
LOG.error(
"Connection error when doing AXFR for %(name)s from "
"%(host)s", log_info)
except Exception:
LOG.exception(
"Problem doing AXFR %(name)s from %(host)s. "
"Trying next server.", log_info)
finally:
to.cancel()
continue
else:
raise exceptions.XFRFailure(
"XFR failed for %(name)s. No servers in %(servers)s was reached." %
{
"name": zone_name,
"servers": servers
})
LOG.debug("AXFR Successful for %s", raw_zone.origin.to_text())
return raw_zone
def do_axfr(zone_name, servers, timeout=None, source=None):
"""
Performs an AXFR for a given zone name
"""
random.shuffle(servers)
timeout = timeout or 10
xfr = None
for srv in servers:
timeout = eventlet.Timeout(timeout)
log_info = {'name': zone_name, 'host': srv}
try:
LOG.info(_LI("Doing AXFR for %(name)s from %(host)s") % log_info)
xfr = dns.query.xfr(srv['ip'],
zone_name,
relativize=False,
timeout=1,
port=srv['port'],
source=source)
raw_zone = dns.zone.from_xfr(xfr, relativize=False)
break
except eventlet.Timeout as t:
if t == timeout:
msg = _LE("AXFR timed out for %(name)s from %(host)s")
LOG.error(msg % log_info)
continue
except dns.exception.FormError:
msg = _LE("Domain %(name)s is not present on %(host)s."
"Trying next server.")
LOG.error(msg % log_info)
except socket.error:
msg = _LE("Connection error when doing AXFR for %(name)s from "
"%(host)s")
LOG.error(msg % log_info)
except Exception:
msg = _LE("Problem doing AXFR %(name)s from %(host)s. "
"Trying next server.")
LOG.exception(msg % log_info)
finally:
timeout.cancel()
continue
else:
msg = _LE("XFR failed for %(name)s. No servers in %(servers)s was "
"reached.")
raise exceptions.XFRFailure(msg % {
"name": zone_name,
"servers": servers
})
LOG.debug("AXFR Successful for %s" % raw_zone.origin.to_text())
return raw_zone
