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# -*- coding: utf-8 -*- |
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import logging |
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import influxdb |
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try: |
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# Test for mypy support (requires Python 3) |
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from typing import Mapping, Text |
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except ImportError: |
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pass |
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class InfluxDBWriter(object): |
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DEFAULT_HEADERS = { |
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'Content-type': 'application/octet-stream', |
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'Accept': 'text/plain' |
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} |
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def __init__(self, |
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host, |
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port, |
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user, |
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password, |
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dbname, |
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use_ssl=False, |
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verify_ssl=False, |
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timeout=5, |
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use_udp=False, |
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retention_policy=None, |
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time_precision=None): |
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""" |
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Initialize InfluxDB writer |
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""" |
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self.host = host |
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self.port = port |
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self.user = user |
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self.password = password |
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self.dbname = dbname |
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self.use_ssl = use_ssl |
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self.verify_ssl = verify_ssl |
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self.timeout = timeout |
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self.use_udp = use_udp |
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self.retention_policy = retention_policy |
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self.time_precision = time_precision |
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self.params = {'db': self.dbname} |
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self.headers = self.DEFAULT_HEADERS |
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if time_precision: |
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self.params['precision'] = time_precision |
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if retention_policy: |
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self.params['rp'] = retention_policy |
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logging.info("Connecting to InfluxDB at %s:%s (SSL: %r, UDP: %r)", |
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host, port, use_ssl, use_udp) |
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self.client = self.create_client() |
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def create_client(self): |
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""" |
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Create an InfluxDB client |
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""" |
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return influxdb.InfluxDBClient(self.host, |
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self.port, |
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self.user, |
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self.password, |
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self.dbname, |
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self.use_ssl, |
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self.verify_ssl, |
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self.timeout, |
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self.use_udp, |
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self.port) |
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def create_database(self, dbname): |
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# type: (Text) -> bool |
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""" |
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Initialize the given database |
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:param dbname: |
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""" |
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self.client.create_database(dbname) |
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def write(self, msg, params=None, expected_response_code=204): |
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# type: (Text, Mapping[str, str], int) -> bool |
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""" |
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Write messages to InfluxDB database. |
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Expects messages in line protocol format. |
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See https://influxdb.com/docs/v0.9/write_protocols/line.html |
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:param expected_response_code: |
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:param params: |
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:param msg: |
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""" |
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if not params: |
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# Use defaults |
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params = self.params |
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try: |
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logging.debug("Writing message: %s", msg) |
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self.client.request(url='write', |
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method='POST', |
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params=params, |
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data="\n".join(msg), |
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expected_response_code=expected_response_code, |
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headers=self.headers |
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) |
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except Exception as e: |
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logging.warning("Cannot write data points: %s", e) |
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return False |
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return True |
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mre /
kafka-influxdb
