我编写了一个打印出指标的 python 脚本,以便我可以将它们添加到 influxdb。该脚本作为我的本地用户工作。它也可以作为telegraf
用户工作。
但是,该脚本在作为电报的一部分运行时会失败:
$ /usr/bin/telegraf -config /etc/telegraf/telegraf.conf -config-directory /etc/telegraf/telegraf.d --test
2019-03-29T19:21:48Z I! Starting Telegraf 1.10.1
2019-03-29T19:21:48Z E! [inputs.exec]: Error in plugin: exec: fork/exec /usr/lib/telegraf/custom-plugins/polltest.py: permission denied for command '/usr/lib/telegraf/custom-plugins/polltest.py'
...
但是,如果我以 telegraf 用户身份运行它,它会按预期工作:
$ sudo -u telegraf /usr/lib/telegraf/custom-plugins/polltest.py
ups,hostname=ups1 battery.charge=100
ups,hostname=ups1 battery.runtime=2622
ups,hostname=ups1 battery.type="PbAC"
...
该脚本由 telegraf 拥有和执行:
$ ls -la /usr/lib/telegraf/custom-plugins/
total 12
drwxr-xr-x 2 root root 4096 Mar 29 14:15 ./
drwxr-xr-x 4 root root 4096 Mar 29 14:06 ../
-rwxr--r-- 1 telegraf telegraf 906 Mar 29 14:15 polltest.py*
我的 telegraf.conf 文件指向适当的位置:
[[inputs.exec]]
commands = [
"/usr/lib/telegraf/custom-plugins/polltest.py"
]
timeout = "5s"
data_format = "influx"
最后,脚本本身非常基本:
#!/usr/bin/python3
import subprocess
p1 = subprocess.Popen(["/bin/upsc", "tripplite"], stdout=subprocess.PIPE, stderr=subprocess.DEVNULL, encoding="utf8")
for result in p1.stdout:
key, value = result.split(":")
measurement = "ups"
tags = "hostname=ups1"
value = value.strip()
# Check if our value is a number. If it's not, surround it in quotes.
# Don't actually use the float() value, as some numbers are returns as
# valid integers
try:
_ = float(value)
field = f'{key}={value}'
except ValueError:
field = f'{key}="{value}"'
influx_line_protocol = f"{measurement},{tags} {field}"
print(influx_line_protocol)
我需要更改什么以便 Telegraf 执行此脚本而不会出现权限错误?