Nagios-NRPE Documentation(譯文)

1. INTRODUCTION（介紹）

a) Purpose（目的）

The NRPE addon（插件） is designed to allow you to execute（履行,執(zhí)行） Nagios plugins on remote Linux/Unix machines.

（NRPE插件設(shè)計(jì)的目的是允許你來(lái)運(yùn)行存在于遠(yuǎn)程linux/Unix主機(jī)上的Nagios plugins）

The main reason for doing this is to allow Nagios to monitor "local" resources (like CPU load, memory usage, etc.) on remote machines.

（最主要的原因是為了允許Nagios去監(jiān)控遠(yuǎn)程主機(jī)的“本地”資源（像CPU負(fù)載，內(nèi)存使用情況，等等））

 Since（由于）these public resources are not usually exposed to external machines, an agent like NRPE must be installed on the remote Linux/Unix machines.

（由于這些公共的資源不是經(jīng)常地被顯露在外部的機(jī)器上,因此像NRPE這樣一個(gè)代理必須安裝在遠(yuǎn)程的linux/Unix機(jī)器上）

Note（提示）: It is possible to execute（執(zhí)行） Nagios plugins on remote Linux/Unix machines through SSH.  通過(guò)SSH來(lái)執(zhí)行遠(yuǎn)程主機(jī)的Nagios plugins是可能的

There is a check_by_ssh plugin that allows you to do this. 

有一個(gè)叫做“check_by_ssh”的插件會(huì)幫助你來(lái)實(shí)現(xiàn)。

Using SSH is more secure than the NRPE addon, but it also imposes a larger (CPU) overhead on both the monitoring and remote machines. （使用SSH比NRPE插件更安全,但是它也同時(shí)會(huì)把更大的開(kāi)支強(qiáng)加于監(jiān)控端和遠(yuǎn)程主機(jī).） This can become an issue when you start monitoring hundreds or thousands of machines. （當(dāng)你開(kāi)始監(jiān)控成百上千臺(tái)主機(jī)時(shí),這將會(huì)是一個(gè)重大的問(wèn)題） Many Nagios admins（administrators縮寫(xiě)） opt for using the NRPE addon because of the lower load it imposes.（許多Nagios管理員選擇使用NRPE插件就是因?yàn)樗募佑谥鳈C(jī)的負(fù)擔(dān)低的優(yōu)點(diǎn)）

b) Design Overview（設(shè)計(jì)概官）

The NRPE addon consists of two pieces:

        （NRPE插件包括兩個(gè)部分：）

• The check_nrpe plugin, which resides on the local monitoring machine

  (check_nrpe這個(gè)插件，存在于本地監(jiān)控主機(jī))

• The NRPE daemon, which runs on the remote Linux/Unix machine

  （NRPE守護(hù)進(jìn)程，運(yùn)行在遠(yuǎn)程linux/Unix主機(jī)上）

When Nagios needs to monitor a resource of service from a remote Linux/Unix machine:

        （當(dāng)Nagios需要監(jiān)控遠(yuǎn)程主機(jī)的一個(gè)服務(wù)的資源時(shí)：）

• Nagios will execute the check_nrpe plugin and tell it what service needs to be checked

  （Nagios將利用check_nrpe插件執(zhí)行相應(yīng)的命令）

• The check_nrpe plugin contacts the NRPE daemon on the remote host over an (optionally) SSL-protected connection

  （check_nrpe通過(guò)被保護(hù)的ssl連接遠(yuǎn)程主機(jī)的NRPE守護(hù)進(jìn)程）

• The NRPE daemon runs the appropriate Nagios plugin to check the service or resource

  (NRPE進(jìn)程運(yùn)行適當(dāng)?shù)腘agios插件去檢測(cè)服務(wù)和資源)

• The results from the service check are passed from the NRPE daemon back to the check_nrpe plugin, which then returns the check results to the Nagios process.

               （將檢測(cè)的結(jié)果從NRPE進(jìn)程交給check_nrpe插件，插件將收到的檢測(cè)結(jié)果返回給Nagios進(jìn)程）

Note: The NRPE daemon requires that Nagios plugins be installed on the remote Linux/Unix host.  Without these, the daemon wouldn't be able to monitor anything.

提示:NRPE進(jìn)程需要在Nagios plugins這個(gè)插件庫(kù)被安裝在遠(yuǎn)程主機(jī)上。如果沒(méi)有這些的話，這個(gè)守護(hù)進(jìn)程將無(wú)法監(jiān)控到任何東西

2. EXAMPLE USES

        a) Direct Checks（直接檢查）

The most straight forward use of the NRPE addon is to monitor "local" or "private" resources on a remote Linux/Unix Machine.

NRPE插件最直截了當(dāng)?shù)氖褂梅椒ㄊ潜O(jiān)控一臺(tái)遠(yuǎn)程linux/Unix主機(jī)的“本地”和“私有”資源

This includes things like CPU load, memory usage, swap usage, current users, disk usage, process states, etc.

 這些資源包括像CPU負(fù)載，內(nèi)存、swap使用情況，當(dāng)前的用戶(hù)數(shù)量，磁盤(pán)使用狀況和進(jìn)程狀態(tài)，等等

        b) Indirect Checks（間接檢查）

You can also use the NRPE addon to indirectly check "public" services and resources of remote servers that might not be reachable directly from the monitoring host.

（你也可以使用NRPE插件來(lái)間接檢測(cè)遠(yuǎn)程服務(wù)器的公共服務(wù)和資源，而這些資源監(jiān)控主機(jī)可能無(wú)法直接可以獲取） 

For instance, if the remote host that the NRPE daemon and plugins are installed on can talk to the a remote web server (but the monitoring host cannot), you can configure the NRPE daemon to allow you to monitor the remote web server indirectly. 

（例如，如果一臺(tái)已經(jīng)安裝過(guò)NRPE進(jìn)程和plugins的遠(yuǎn)程主機(jī)可以和另一臺(tái)遠(yuǎn)程web服務(wù)器進(jìn)行通信，而主控端卻不能，你可以通過(guò)配置NCRE進(jìn)程來(lái)實(shí)現(xiàn)間接監(jiān)控遠(yuǎn)程web服務(wù)器的目的）

The NRPE daemon is essentially acting as proxy in this case.

（此刻，NCRE進(jìn)程本質(zhì)上在這里是正在扮演一個(gè)代理的角色）

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致：

        學(xué)習(xí)監(jiān)控的同時(shí)，發(fā)現(xiàn)關(guān)于Nagios的幫助文檔寫(xiě)的太好了，于是就忍不住想要嘗試翻譯一下，這只是NRPE參考文檔的關(guān)于該技術(shù)的簡(jiǎn)要介紹，后續(xù)的安裝和使用方法都還沒(méi)有，如果有時(shí)間，會(huì)盡自己所能的翻譯一下。