diff options
Diffstat (limited to 'python')
| -rw-r--r-- | python/Makefile.am | 15 | ||||
| -rw-r--r-- | python/Makefile.in | 525 | ||||
| -rw-r--r-- | python/libknot/__init__.py.in | 3 | ||||
| -rwxr-xr-x | python/libknot/control.py | 441 | ||||
| -rw-r--r-- | python/setup.py.in | 27 | ||||
| -rwxr-xr-x | python/stats_http.py | 73 | ||||
| -rwxr-xr-x | python/stats_influxdb.py | 79 |
7 files changed, 1163 insertions, 0 deletions
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--git a/python/libknot/control.py b/python/libknot/control.py new file mode 100755 index 0000000..ced1be6 --- /dev/null +++ b/python/libknot/control.py @@ -0,0 +1,441 @@ +"""Libknot server control interface wrapper. + +Example: + import json + from libknot.control import * + + #load_lib("/usr/lib/libknot.so") + + ctl = KnotCtl() + ctl.connect("/var/run/knot/knot.sock") + + try: + ctl.send_block(cmd="conf-begin") + resp = ctl.receive_block() + + ctl.send_block(cmd="conf-set", section="zone", item="domain", data="test") + resp = ctl.receive_block() + + ctl.send_block(cmd="conf-commit") + resp = ctl.receive_block() + + ctl.send_block(cmd="conf-read", section="zone", item="domain") + resp = ctl.receive_block() + print(json.dumps(resp, indent=4)) + finally: + ctl.send(KnotCtlType.END) + ctl.close() +""" + +from ctypes import cdll, c_void_p, c_int, c_char_p, c_uint, byref +from enum import IntEnum +import sys + +CTL_ALLOC = None +CTL_FREE = None +CTL_SET_TIMEOUT = None +CTL_CONNECT = None +CTL_CLOSE = None +CTL_SEND = None +CTL_RECEIVE = None +CTL_ERROR = None + + +def load_lib(path=None): + """Loads the libknot library.""" + + if path is None: + version = "" + try: + from libknot import LIBKNOT_VERSION + version = ".%u" % int(LIBKNOT_VERSION) + except: + pass + + if sys.platform == "darwin": + path = "libknot%s.dylib" % version + else: + path = "libknot.so%s" % version + LIB = cdll.LoadLibrary(path) + + global CTL_ALLOC + CTL_ALLOC = LIB.knot_ctl_alloc + CTL_ALLOC.restype = c_void_p + + global CTL_FREE + CTL_FREE = LIB.knot_ctl_free + CTL_FREE.argtypes = [c_void_p] + + global CTL_SET_TIMEOUT + CTL_SET_TIMEOUT = LIB.knot_ctl_set_timeout + CTL_SET_TIMEOUT.argtypes = [c_void_p, c_int] + + global CTL_CONNECT + CTL_CONNECT = LIB.knot_ctl_connect + CTL_CONNECT.restype = c_int + CTL_CONNECT.argtypes = [c_void_p, c_char_p] + + global CTL_CLOSE + CTL_CLOSE = LIB.knot_ctl_close + CTL_CLOSE.argtypes = [c_void_p] + + global CTL_SEND + CTL_SEND = LIB.knot_ctl_send + CTL_SEND.restype = c_int + CTL_SEND.argtypes = [c_void_p, c_uint, c_void_p] + + global CTL_RECEIVE + CTL_RECEIVE = LIB.knot_ctl_receive + CTL_RECEIVE.restype = c_int + CTL_RECEIVE.argtypes = [c_void_p, c_void_p, c_void_p] + + global CTL_ERROR + CTL_ERROR = LIB.knot_strerror + CTL_ERROR.restype = c_char_p + CTL_ERROR.argtypes = [c_int] + + +class KnotCtlError(Exception): + """Libknot server control error.""" + + def __init__(self, message, data=None): + """ + @type message: str + @type data: KnotCtlData + """ + + self.message = message + self.data = data + + def __str__(self): + return "%s (data: %s)" % (self.message, self.data) + + +class KnotCtlType(IntEnum): + """Libknot server control data unit types.""" + + END = 0 + DATA = 1 + EXTRA = 2 + BLOCK = 3 + + +class KnotCtlDataIdx(IntEnum): + """Libknot server control data unit indices.""" + + COMMAND = 0 + FLAGS = 1 + ERROR = 2 + SECTION = 3 + ITEM = 4 + ID = 5 + ZONE = 6 + OWNER = 7 + TTL = 8 + TYPE = 9 + DATA = 10 + FILTER = 11 + + +class KnotCtlData(object): + """Libknot server control data unit.""" + + DataArray = c_char_p * len(KnotCtlDataIdx) + + def __init__(self): + self.data = self.DataArray() + + def __str__(self): + string = str() + + for idx in KnotCtlDataIdx: + if self.data[idx]: + if string: + string += ", " + string += "%s = %s" % (idx.name, self.data[idx]) + + return string + + def __getitem__(self, index): + """Data unit item getter. + + @type index: KnotCtlDataIdx + @rtype: str + """ + + value = self.data[index] + if not value: + value = str() + return value if isinstance(value, str) else value.decode() + + def __setitem__(self, index, value): + """Data unit item setter. + + @type index: KnotCtlDataIdx + @type value: str + """ + + self.data[index] = c_char_p(value.encode()) if value else c_char_p() + +class KnotCtl(object): + """Libknot server control interface.""" + + def __init__(self): + if not CTL_ALLOC: + load_lib() + self.obj = CTL_ALLOC() + + def __del__(self): + CTL_FREE(self.obj) + + def set_timeout(self, timeout): + """Sets control socket operations timeout in seconds. + + @type timeout: int + """ + + CTL_SET_TIMEOUT(self.obj, timeout * 1000) + + def connect(self, path): + """Connect to a specified control UNIX socket. + + @type path: str + """ + + ret = CTL_CONNECT(self.obj, path.encode()) + if ret != 0: + err = CTL_ERROR(ret) + raise KnotCtlError(err if isinstance(err, str) else err.decode()) + + def close(self): + """Disconnects from the current control socket.""" + + CTL_CLOSE(self.obj) + + def send(self, data_type, data=None): + """Sends a data unit to the connected control socket. + + @type data_type: KnotCtlType + @type data: KnotCtlData + """ + + ret = CTL_SEND(self.obj, data_type, + data.data if data else c_char_p()) + if ret != 0: + err = CTL_ERROR(ret) + raise KnotCtlError(err if isinstance(err, str) else err.decode()) + + def receive(self, data=None): + """Receives a data unit from the connected control socket. + + @type data: KnotCtlData + @rtype: KnotCtlType + """ + + data_type = c_uint() + ret = CTL_RECEIVE(self.obj, byref(data_type), + data.data if data else c_char_p()) + if ret != 0: + err = CTL_ERROR(ret) + raise KnotCtlError(err if isinstance(err, str) else err.decode()) + return KnotCtlType(data_type.value) + + def send_block(self, cmd, section=None, item=None, identifier=None, zone=None, + owner=None, ttl=None, rtype=None, data=None, flags=None, + filter=None): + """Sends a control query block. + + @type cmd: str + @type section: str + @type item: str + @type identifier: str + @type zone: str + @type owner: str + @type ttl: str + @type rtype: str + @type data: str + @type filter: str + """ + + query = KnotCtlData() + query[KnotCtlDataIdx.COMMAND] = cmd + query[KnotCtlDataIdx.SECTION] = section + query[KnotCtlDataIdx.ITEM] = item + query[KnotCtlDataIdx.ID] = identifier + query[KnotCtlDataIdx.ZONE] = zone + query[KnotCtlDataIdx.OWNER] = owner + query[KnotCtlDataIdx.TTL] = ttl + query[KnotCtlDataIdx.TYPE] = rtype + query[KnotCtlDataIdx.DATA] = data + query[KnotCtlDataIdx.FLAGS] = flags + query[KnotCtlDataIdx.FILTER] = filter + + self.send(KnotCtlType.DATA, query) + self.send(KnotCtlType.BLOCK) + + def _receive_conf(self, out, reply): + + section = reply[KnotCtlDataIdx.SECTION] + ident = reply[KnotCtlDataIdx.ID] + item = reply[KnotCtlDataIdx.ITEM] + data = reply[KnotCtlDataIdx.DATA] + + # Add the section if not exists. + if section not in out: + out[section] = dict() + + # Add the identifier if not exists. + if ident and ident not in out[section]: + out[section][ident] = dict() + + # Return if no item/value. + if not item: + return + + item_level = out[section][ident] if ident else out[section] + + # Treat alone identifier item differently. + if item in ["id", "domain", "target"]: + if data not in out[section]: + out[section][data] = dict() + else: + if item not in item_level: + item_level[item] = list() + + if data: + item_level[item].append(data) + + def _receive_zone_status(self, out, reply): + + zone = reply[KnotCtlDataIdx.ZONE] + rtype = reply[KnotCtlDataIdx.TYPE] + data = reply[KnotCtlDataIdx.DATA] + + # Add the zone if not exists. + if zone not in out: + out[zone] = dict() + + out[zone][rtype] = data + + def _receive_zone(self, out, reply): + + zone = reply[KnotCtlDataIdx.ZONE] + owner = reply[KnotCtlDataIdx.OWNER] + ttl = reply[KnotCtlDataIdx.TTL] + rtype = reply[KnotCtlDataIdx.TYPE] + data = reply[KnotCtlDataIdx.DATA] + + # Add the zone if not exists. + if zone not in out: + out[zone] = dict() + + if owner not in out[zone]: + out[zone][owner] = dict() + + if rtype not in out[zone][owner]: + out[zone][owner][rtype] = dict() + + # Add the key/value. + out[zone][owner][rtype]["ttl"] = ttl + + if not "data" in out[zone][owner][rtype]: + out[zone][owner][rtype]["data"] = [data] + else: + out[zone][owner][rtype]["data"].append(data) + + def _receive_stats(self, out, reply): + + zone = reply[KnotCtlDataIdx.ZONE] + section = reply[KnotCtlDataIdx.SECTION] + item = reply[KnotCtlDataIdx.ITEM] + idx = reply[KnotCtlDataIdx.ID] + data = int(reply[KnotCtlDataIdx.DATA]) + + # Add the zone if not exists. + if zone: + if "zone" not in out: + out["zone"] = dict() + + if zone not in out["zone"]: + out["zone"][zone] = dict() + + section_level = out["zone"][zone] if zone else out + + if section not in section_level: + section_level[section] = dict() + + if idx: + if item not in section_level[section]: + section_level[section][item] = dict() + + section_level[section][item][idx] = data + else: + section_level[section][item] = data + + def receive_stats(self): + """Receives statistics answer and returns it as a structured dictionary. + + @rtype: dict + """ + + out = dict() + err_reply = None + + while True: + reply = KnotCtlData() + reply_type = self.receive(reply) + + # Stop if not data type. + if reply_type not in [KnotCtlType.DATA, KnotCtlType.EXTRA]: + break + + # Check for an error. + if reply[KnotCtlDataIdx.ERROR]: + err_reply = reply + continue + + self._receive_stats(out, reply) + + if err_reply: + raise KnotCtlError(err_reply[KnotCtlDataIdx.ERROR], err_reply) + + return out + + def receive_block(self): + """Receives a control answer and returns it as a structured dictionary. + + @rtype: dict + """ + + out = dict() + err_reply = None + + while True: + reply = KnotCtlData() + reply_type = self.receive(reply) + + # Stop if not data type. + if reply_type not in [KnotCtlType.DATA, KnotCtlType.EXTRA]: + break + + # Check for an error. + if reply[KnotCtlDataIdx.ERROR]: + err_reply = reply + continue + + # Check for config data. + if reply[KnotCtlDataIdx.SECTION]: + self._receive_conf(out, reply) + # Check for zone data. + elif reply[KnotCtlDataIdx.ZONE]: + if reply[KnotCtlDataIdx.OWNER]: + self._receive_zone(out, reply) + else: + self._receive_zone_status(out, reply) + else: + continue + + if err_reply: + raise KnotCtlError(err_reply[KnotCtlDataIdx.ERROR], err_reply) + + return out diff --git a/python/setup.py.in b/python/setup.py.in new file mode 100644 index 0000000..8d57bc9 --- /dev/null +++ b/python/setup.py.in @@ -0,0 +1,27 @@ +import setuptools + +setuptools.setup( + name='libknot', + version='@PACKAGE_VERSION@', + description='Python bindings for libknot', + author='Daniel Salzman', + author_email='daniel.salzman@nic.cz', + url='https://gitlab.labs.nic.cz/knot/knot-dns', + license='GPL-3.0', + packages=['libknot'], + classifiers=[ # See https://pypi.org/classifiers + 'Development Status :: 5 - Production/Stable', + 'Intended Audience :: Developers', + 'Intended Audience :: System Administrators', + 'License :: OSI Approved :: GNU General Public License v3 (GPLv3)', + 'Programming Language :: Python :: 3', + 'Programming Language :: Python :: 3.4', + 'Programming Language :: Python :: 3.5', + 'Programming Language :: Python :: 3.6', + 'Programming Language :: Python :: 3.7', + 'Programming Language :: Python :: 3.8', + 'Topic :: Internet :: Name Service (DNS)', + 'Topic :: Software Development :: Libraries', + 'Topic :: System :: Systems Administration', + ] +) diff --git a/python/stats_http.py b/python/stats_http.py new file mode 100755 index 0000000..a38d5f7 --- /dev/null +++ b/python/stats_http.py @@ -0,0 +1,73 @@ +#!/usr/bin/env python3 + +"""Simple program for exposing statistics from Knot DNS over HTTP/HTTPS.""" + +import http.server +import libknot.control +import json +import ssl +import time + +# Configuration. +#libknot.control.load_lib("../src/.libs/libknot.so") +ctl_socket = "/tmp/knot.sock" +ctl_timeout = 2 +ctl_flags = "" # set "F" for all supported counters. +http_host = "127.0.0.1" +http_port = 8080 +ssl_enable = False +ssl_keyfile = "./mykey.key" +ssl_certfile = "./mycert.crt" + + +class StatsServer(http.server.BaseHTTPRequestHandler): + def do_GET(self): + self.send_response(200) + self.send_header("Content-type", "text/html") + self.end_headers() + + # Connect to Knot server. + ctl = libknot.control.KnotCtl() + ctl.connect(ctl_socket) + ctl.set_timeout(ctl_timeout) + + # Get global metrics. + global_stats = dict() + try: + ctl.send_block(cmd="stats", flags=ctl_flags) + global_stats = ctl.receive_stats() + except: + pass + + # Get zone metrics. + zone_stats = dict() + try: + ctl.send_block(cmd="zone-stats", flags=ctl_flags) + zone_stats = ctl.receive_stats() + except: + pass + + # Disconnect from the server. + ctl.send(libknot.control.KnotCtlType.END) + ctl.close() + + # Publish the stats. + stats = {**global_stats, **zone_stats} + self.wfile.write(bytes(json.dumps(stats, indent=4, sort_keys=True), "utf-8")) + + +httpd = http.server.HTTPServer((http_host, http_port), StatsServer) + +if ssl_enable: + httpd.socket = ssl.wrap_socket(httpd.socket, keyfile=ssl_keyfile, + certfile=ssl_certfile, server_side=True) + +print("%s: HTTP%s Server Start - %s:%s" % + (time.asctime(), "S" if ssl_enable else "", http_host, http_port)) + +try: + httpd.serve_forever() +except KeyboardInterrupt: + pass + +httpd.server_close() diff --git a/python/stats_influxdb.py b/python/stats_influxdb.py new file mode 100755 index 0000000..33d3709 --- /dev/null +++ b/python/stats_influxdb.py @@ -0,0 +1,79 @@ +#!/usr/bin/env python3 + +"""Simple program for exporting statistics from Knot DNS to influxdb.""" + +import libknot.control +import io +import json +import os +import time + +# Configuration. +#libknot.control.load_lib("../src/.libs/libknot.so") +ctl_socket = "/tmp/knot.sock" +ctl_timeout = 2 +# InfluxDB parameters. +host = "217.31.192.164" +port = "8086" +db = "KnotDNS" +instance = "Knot" +# Send metrics every N seconds. +send_interval = 5 + + +def send(): + # Connect to Knot server. + ctl = libknot.control.KnotCtl() + ctl.connect(ctl_socket) + ctl.set_timeout(ctl_timeout) + + # Get global metrics. + global_stats = dict() + try: + ctl.send_block(cmd="stats", flags="F") + global_stats = ctl.receive_stats() + except: + pass + + # Get zone metrics. + zone_stats = dict() + try: + ctl.send_block(cmd="zone-stats", flags="F") + zone_stats = ctl.receive_stats() + except: + pass + + # Disconnect from the server. + ctl.send(libknot.control.KnotCtlType.END) + ctl.close() + + # Prepare the metrics to publish. + output = io.StringIO() + + stats = {**global_stats, **zone_stats} + timestamp = str(int(time.time())) + + for metric in stats["server"]: + print("server,instance=" + instance + ",metric=" + metric + " value=" + + stats["server"][metric] + " " + timestamp, file=output) + + for group in stats["mod-stats"]: + for metric in stats["mod-stats"][group]: + print(group + ",instance=" + instance + ",metric=" + metric + + " value=" + stats["mod-stats"][group][metric] + " " + timestamp, + file=output) + + # Publish the metrics. + os.system("curl -i -XPOST 'http://%s:%s/write?db=%s&precision=s' --data-binary '%s'" + % (host, port, db, output.getvalue())) + + +print("%s: Graphite sender - Server Start - %s:%s" % + (time.asctime(), host, port)) + +try: + while(True): + send() + time.sleep(send_interval) +except KeyboardInterrupt: + pass |