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python - 如何解决电报中的此错误？

问题描述

我有一个自定义 python 插件，用于将数据拉入 Telegraf。它按预期打印出线路协议输出。

在我的 Ubuntu 18.04 环境中，运行此插件时，我在日志中看到一行：

2020-12-28T21:55:00Z E! [inputs.exec] Error in plugin: exec: exit status 1 for command '/my_company/plugins-enabled/plugin-mysystem/poll_mysystem.py': Traceback (most recent call last):...

这就对了。我不知道如何获得实际的回溯。

如果我运行sudo -u telegraf /usr/bin/telegraf -config /etc/telegraf/telegraf.conf，插件将按预期工作。它完全按照应有的方式轮询和加载数据。

当 telegraf 自行执行插件时，我不确定如何继续解决此错误。

我已经重新启动了电报服务。我已经验证了权限（并且我认为上面的执行表明它应该可以工作）。

基于收到的评论和答案的一些额外细节：

插件代码（/my_company/plugins-enabled/plugin-mysystem/poll_mysystem.py）：

from google.auth.transport.requests import Request
from google.oauth2 import id_token
import requests
import os

RUNTIME_URL = INTERNAL_URL
MEASUREMENT = "MY_MEASUREMENT"
CREDENTIALS = "GOOGLE_SERVICE_FILE.json"
os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = CREDENTIALS  # ENV VAR REQUIRED BY GOOGLE CODE BELOW
CLIENT_ID = VALUE_FROM_GOOGLE

exclude_fields = ["name", "version"] # Don't try to put these into influxdb from json response

def make_iap_request(url, client_id, method="GET", **kwargs):
    # Code provided by Google docs
    # Set the default timeout, if missing
    if "timeout" not in kwargs:
        kwargs["timeout"] = 90

    # Obtain an OpenID Connect (OIDC) token from metadata server or using service
    # account.
    open_id_connect_token = id_token.fetch_id_token(Request(), client_id)

    # Fetch the Identity-Aware Proxy-protected URL, including an
    # Authorization header containing "Bearer " followed by a
    # Google-issued OpenID Connect token for the service account.
    resp = requests.request(method, url, headers={"Authorization": "Bearer {}".format(open_id_connect_token)}, **kwargs)
    if resp.status_code == 403:
        raise Exception("Service account does not have permission to " "access the IAP-protected application.")
    elif resp.status_code != 200:
        raise Exception(
            "Bad response from application: {!r} / {!r} / {!r}".format(resp.status_code, resp.headers, resp.text)
        )
    else:
        return resp.json()


def print_results(results):
    """
    Take the results of a Dolores call and print influx line protocol results
    """
    for item in results["workflow"]:
        line_protocol_line_base = f"{MEASUREMENT},name={item['name']}"
        values = ""
        for key, value in item.items():
            if key not in exclude_fields:
                values = values + f",{key}={value}"
        values = values[1:]
        line_protocol_line = f"{line_protocol_line_base} {values}"
        print(line_protocol_line)


def main():
    current_runtime = make_iap_request(URL, CLIENT_ID, timeout=30)
    print_results(current_runtime)


if __name__== "__main__":
    main()

文件的相关部分telegraf.conf：

[[inputs.exec]]
  ## Commands array
  commands = [
    "/my_company/plugins-enabled/plugin-*/poll_*.py",
  ]

配置文件的代理部分

[agent]
  interval = "60s"
  round_interval = true
  metric_batch_size = 1000
  metric_buffer_limit = 10000
  collection_jitter = "0s"
  flush_interval = "10s"
  flush_jitter = "0s"
  precision = ""
  debug = false
  quiet = false
  logfile = "/var/log/telegraf/telegraf.log"
  hostname = ""
  omit_hostname = true

接下来我该怎么做？

标签： pythoninfluxdbtelegraftelegraf-inputs-plugintelegraf-plugins

解决方案

The exec plugin is truncating your Exception message at the newline. If you wrap your call to make_iap_request in a try/except block, and then print(e, file=sys.stderr) rather than letting the Exception bubble all the way up, that should tell you more.

def main():
    """
    Query URL and print line protocol
    """
    try:
        current_runtime = make_iap_request(URL, CLIENT_ID, timeout=30)
        print_results(current_runtime)
    except Exception as e:
        print(e, file=sys.stderr)

Alternately your script could log error messages to it's own log file, rather than passing them back to Telegraf. This would give you more control over what's logged.

I suspect you're running into an environment issue, where there's something different about how you're running it. If not permissions, it could be environment variable differences.

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