1

我一直在研究 icinga2 的聊天机器人界面，但还没有找到一种持久的方法来在 icinga2 服务器的重新启动/重新加载后幸存下来。在移动 try/except 块、使用请求会话等一周后，是时候联系社区了。

这是请求函数的当前迭代：

    def i2api_request(url, headers={}, data={}, stream=False, *, auth=api_auth, ca=api_ca):
    ''' Do not call this function directly; it's a helper for the i2* command functions '''
# Adapted from http://docs.icinga.org/icinga2/latest/doc/module/icinga2/chapter/icinga2-api
# Section 11.10.3.1

    try:
        r = requests.post(url,
            headers=headers,
            auth=auth,
            data=json.dumps(data),
            verify=ca,
            stream=stream
            )
    except (requests.exceptions.ChunkedEncodingError,requests.packages.urllib3.exceptions.ProtocolError, http.client.IncompleteRead,ValueError) as drop:
        return("No connection to Icinga API")

    if r.status_code == 200:
        for line in r.iter_lines():
            try:
                if stream == True:
                    yield(json.loads(line.decode('utf-8')))
                else:
                    return(json.loads(line.decode('utf-8')))
            except:
                debug("Could not produce JSON from "+line)
                continue
    else:
        #r.raise_for_status()
        debug('Received a bad response from Icinga API: '+str(r.status_code))
        print('Icinga2 API connection lost.')

（调试功能只是标记并将指示的错误打印到控制台。）

这段代码可以很好地处理来自 API 的事件并将它们发送到聊天机器人，但是如果重新加载 icinga 服务器，就像在 /etc/icinga2... 中添加新的服务器定义后需要的那样，侦听器会崩溃。

这是我在服务器重新启动时得到的错误响应：

    Exception in thread Thread-11:
Traceback (most recent call last):
  File "/home/errbot/err3/lib/python3.4/site-packages/requests/packages/urllib3/response.py", line 447, in _update_chunk_length
    self.chunk_left = int(line, 16)
ValueError: invalid literal for int() with base 16: b''

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/errbot/err3/lib/python3.4/site-packages/requests/packages/urllib3/response.py", line 228, in _error_catcher
    yield
  File "/home/errbot/err3/lib/python3.4/site-packages/requests/packages/urllib3/response.py", line 498, in read_chunked
    self._update_chunk_length()
  File "/home/errbot/err3/lib/python3.4/site-packages/requests/packages/urllib3/response.py", line 451, in _update_chunk_length
    raise httplib.IncompleteRead(line)
http.client.IncompleteRead: IncompleteRead(0 bytes read)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/errbot/err3/lib/python3.4/site-packages/requests/models.py", line 664, in generate
    for chunk in self.raw.stream(chunk_size, decode_content=True):
  File "/home/errbot/err3/lib/python3.4/site-packages/requests/packages/urllib3/response.py", line 349, in stream
    for line in self.read_chunked(amt, decode_content=decode_content):
  File "/home/errbot/err3/lib/python3.4/site-packages/requests/packages/urllib3/response.py", line 526, in read_chunked
    self._original_response.close()
  File "/usr/lib64/python3.4/contextlib.py", line 77, in __exit__
    self.gen.throw(type, value, traceback)
  File "/home/errbot/err3/lib/python3.4/site-packages/requests/packages/urllib3/response.py", line 246, in _error_catcher
    raise ProtocolError('Connection broken: %r' % e, e)
requests.packages.urllib3.exceptions.ProtocolError: ('Connection broken: IncompleteRead(0 bytes read)', IncompleteRead(0 bytes read))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib64/python3.4/threading.py", line 920, in _bootstrap_inner
    self.run()
  File "/usr/lib64/python3.4/threading.py", line 868, in run
    self._target(*self._args, **self._kwargs)
  File "/home/errbot/plugins/icinga2bot.py", line 186, in report_events
    for line in queue:
  File "/home/errbot/plugins/icinga2bot.py", line 158, in i2events
    for line in queue:
  File "/home/errbot/plugins/icinga2bot.py", line 98, in i2api_request
    for line in r.iter_lines():
  File "/home/errbot/err3/lib/python3.4/site-packages/requests/models.py", line 706, in iter_lines
    for chunk in self.iter_content(chunk_size=chunk_size, decode_unicode=decode_unicode):
  File "/home/errbot/err3/lib/python3.4/site-packages/requests/models.py", line 667, in generate
    raise ChunkedEncodingError(e)
requests.exceptions.ChunkedEncodingError: ('Connection broken: IncompleteRead(0 bytes read)', IncompleteRead(0 bytes read))

使用 Icinga2.4，每次重新启动服务器时都会发生这种崩溃。我以为升级到 2.5 后问题就消失了，但现在它似乎变成了一个 heisenbug。

4

1 回答 1

0

我最终在 IRC 上获得了重新排序 try/except 块的建议，并确保它们位于正确的位置。这是工作结果。

def i2api_request(url, headers={}, data={}, stream=False, *, auth=api_auth, ca=api_ca):
    ''' Do not call this function directly; it's a helper for the i2* command functions '''
# Adapted from http://docs.icinga.org/icinga2/latest/doc/module/icinga2/chapter/icinga2-api
# Section 11.10.3.1

    debug(url)
    debug(headers)
    debug(data)

    try:
        r = requests.post(url,
        headers=headers,
        auth=auth,
        data=json.dumps(data),
        verify=ca,
        stream=stream
        )
        debug("Connecting to Icinga server")
        debug(r)
        if r.status_code == 200:
            try:
                for line in r.iter_lines():
                    debug('in i2api_request: '+str(line))
                    try:
                        if stream == True:
                            yield(json.loads(line.decode('utf-8')))
                        else:
                            return(json.loads(line.decode('utf-8')))
                    except:
                        debug("Could not produce JSON from "+line)
                        return("Could not produce JSON from "+line)
            except (requests.exceptions.ChunkedEncodingError,ConnectionRefusedError):
                return("Connection to Icinga lost.")
        else:
            debug('Received a bad response from Icinga API: '+str(r.status_code))
            print('Icinga2 API connection lost.')
    except (requests.exceptions.ConnectionError,
    requests.packages.urllib3.exceptions.NewConnectionError) as drop:
        debug("No connection to Icinga API. Error received: "+str(drop))
        sleep(5)
        return("No connection to Icinga API.")
于 2016-08-26T16:59:26.840 回答