nrpe on Microsoft machines

[Neil]

Hi Michael, 

I got the nrpe working in FreeBSD. And it's able to monitor my /usr and 
/var. I also got it compiled and installed in Solaris 8. Problem is that, I 
tried running the check_disk which I copied from my freebsd or linux and 
this is what I got in solaris: 

check_disk: Cannot find /lib/ld-linux.so.2 

So looks like i need to install a linux dependency. What would it be then? 

Michael Tucker writes: 

> 
> On Friday, January 16, 2004, at 02:58  PM, Neil wrote: 
> 
>> Am I correct that nrpe on unix and rstatd on unix are 2 separate options? 
>> If it is, I just might as well go with nrpe.
> 
> Yes, nrpe is the "Nagios remote plug-in executor". It's a program for 
> running Nagios plugins locally on a remote host. (The plugin runs locally 
> on the host; nrpe collects the output and returns it over the network to 
> the Nagios server that initiated the query.) This is different from 
> running rstatd (or any other RPC command) to query the status of a machine 
> over the network. (Well, ok, there are certain similarities... the bottom 
> line is similar, but the path is different.) 
> 
> The only drawback to nrpe is that you are limited to plugins that other 
> people have written, unless you can write one on your own. But there are a 
> *lot* of plugins available. 
> 
>> I thought, it was only for Windows machine. Problem is, where can I find 
>> nrpe for unix that will work on Solaris?
> 
> Actually, on the contrary: nrpe is written for Unix. Go to the Nagios web 
> site <http://www.nagios.org>, downloads area 
> <http://www.nagios.org/download/extras.php>; there's a link for nrpe, 
> which will allow you to download the source code. You'll have to compile 
> it, preferably using gcc. You can download the gcc compiler for free from 
> <sunfreeware.secsup.org>. Specify your version of Solaris (upper right 
> scrollable list), then click the package you want to download (lower right 
> scrollable list). 
> 
> There is a NRPE_NT project also listed on that page, but I don't know 
> anything about it. You'll have to explore that one on your own. :-) 
> 
> I'm running Solaris 9. If you are, too, I don't mind sending you my 
> compiled version of nrpe. However, from a strict security standpoint, if I 
> were in your shoes I wouldn't accept it. I'm not a "trusted host", per se. 
> You don't know who I am, or what I might have done to that program before 
> sending it to you. You might trust me, but how would you answer the 
> question if your boss asked you: "How do you know that guy didn't put 
> something malicious in the code?" It would be best if you download the 
> source yourself from the official site, and compile it yourself. 
> 
>> About security, you're right. I will have to ask the guys to enable 
>> tcpwrapper the nrpe service. In that way, nagios will be the only one to 
>> connect to the daemon.
> 
> It's very easy to set that part up. Just edit /etc/inetd.conf, 
> /etc/services, /etc/hosts.allow and /etc/hosts.deny; then restart the 
> inetd daemon. The README file that comes with nrpe tells you how. If you 
> have any trouble, I'd be happy to help you out since I got it working. 
> 
>> Also eventually, if the managers will like nagios(coz now they liked it), 
>> I will present to them a distributed nagios setup. Does this mean that 
>> all the monitoring hosts will only be doing passive checks?
> 
> No, it works like this: 
> 
> For a group of hosts to be monitored, there is a server doing the 
> monitoring ("active checks"). This server is called a "distributed 
> server". There might be more than one distributed server in your network, 
> each monitoring a different group of hosts. 
> 
> Each distributed server actively collects status information, then 
> forwards it to the one server that does notifications, reports, etc. That 
> server is called the "central server". It does *no* active checks of its 
> own (unless you want it to); instead, it just checks "passively" for the 
> reports forwarded to it by the distributed server(s). 
> 
> There's a very good description of distributed monitoring in the Nagios 
> documentation. Bring up your Nagios web interface and click on 
> "Documentation" (at the top left, under "General"). Then click on "Table 
> of Contents", then look for and click on "Distributed monitoring" (under 
> "Advanced Topics"). There are even some nifty graphics and diagrams you 
> can show your boss. :-) 
> 
>> Thanks for the advice. It really helped. 
>> 
> 
> Glad to help. I'm very new at this (Nagios) myself; I've only been trying 
> to implement Nagios since late November. But I'm happy to share with you 
> the things I've figured out. It's a way of giving back to the community, 
> as thanks for the help that others have given me. 
> 
> Yours,
> Michael 
> 
 


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