☰

NRPE：无法读取输出-权限问题

tag-icon • tag-icon nagios nrpe
NRPE：无法读取输出-权限问题

我尽量让自己清楚：我的大脑即将爆炸，就像那些爆炸的小猫一样。

两台机器都是 Centos 7：

[[email protected]]# cat /proc/version
Linux version 3.10.0-693.11.6.el7.x86_64 ([email protected]) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) ) #1 SMP Thu Jan 4 01:06:37 UTC 2018

来自 EPEL 的最新 NRPE：

[[email protected]]# ./check_nrpe -H 192.168.10.2
NRPE v3.2.0

我正在尝试从 nagios 服务器重新启动服务，以便设置事件处理程序。一切都从大量脚本开始，但现在我将问题缩小到：

[[email protected]]# ./check_nrpe -H 192.168.10.2 -c restart
NRPE: Unable to read output

[[email protected]]# ./check_nrpe -H 192.168.10.2 -c status
(... correct service status output ...)
Loaded: loaded (/usr/lib/systemd/system/cachefilesd.service
(... correct service status output ...)

因此，我可以状态服务，但无法启动或重新启动。

[[email protected]]# cat /etc/nagios/nrpe.conf:

[...]
nrpe_user=nrpe
nrpe_group=nrpe
allowed_hosts=127.0.0.1,192.168.10.1
command[status]=/lib64/nagios/plugins/status.sh
command[restart]=/lib64/nagios/plugins/restart.sh
[...]


[[email protected]]# cat /lib64/nagios/plugins/status.sh

#!/bin/bash
sudo systemctl status cachefilesd
exit 0

和

[[email protected]]# cat /lib64/nagios/plugins/restart.sh

#!/bin/bash
sudo systemctl restart cachefilesd
exit 0

sudo 命令：

[[email protected]]# cat /etc/sudoers

# Defaults specification
Defaults: nrpe !requiretty
Defaults: nagios !requiretty

nagios ALL = NOPASSWD: /sbin/service,/usr/bin/systemctl,/usr/sbin/service
nrpe ALL = NOPASSWD: /sbin/service,/usr/bin/systemctl,/usr/sbin/service

如果我输入：

[[email protected]]# sudo -u nrpe -H ./restart-cachefilesd.sh

一切皆好。

我在 NRPE 中启用了调试，并得到：

nrpe[5431]: Host address is in allowed_hosts
nrpe[5431]: Host 192.168.10.1 is asking for command 'restart' to be run...
nrpe[5431]: Running command: /lib64/nagios/plugins/restart.sh
nrpe[5432]: WARNING: my_system() seteuid(0): Operation not permitted
nrpe[5431]: Command completed with return code 0 and output:
nrpe[5431]: Return Code: 3, Output: NRPE: Unable to read output
nrpe[5431]: Connection from 192.168.10.1 closed.

我尝试了strace输出，但是对我来说太多了......

答案1

您不应该将 sudo 放在脚本里面，而应该将 sudo 包含在 nrpe.cfg 文件中：

command[status]=sudo /lib64/nagios/plugins/status.sh

代替

command[status]=/lib64/nagios/plugins/status.sh

相关内容