[smokeping-users] Master/slave setup

[Tobias Oetiker]

Hi Jeff,

use short names ... note that the names of the slaves must be
what the slaves return when you type 'hostname' it does not matter
if these names can be resolved or not ... the authentication
happens via the shared secret ...

cheers
tobi

Yesterday Jeff Terrell wrote:

> Hello,
>
> I'm trying to get a master/slave architecture setup, and I'm having a
> really hard time with it.  Smokeping promises to be just what I
> need...now, if only I could get it running! :-)
>
> What I want is very simple.  I want chewie.net.unc.edu to be the
> master, and artoo.cs.unc.edu and threepio.cs.unc.edu to be the
> slaves.*  (Note that these machines are not in the same domain, so I
> can't use simple short-names like 'chewie', 'artoo', and
> 'threepio'.)  I want each slave to ping the other one, and I want the
> master to merely collect the ping measurements.  Seems simple enough,
> yeah?
>
> (*names have been changed to protect the innocent...)
>
> I first tried the following configuration:
>
> =============== CONFIGURATION ==================
> *** Slaves ***
> secrets=/opt/local/smokeping/etc/smokeping_secrets
>
> +artoo.cs.unc.edu
> display_name=Sitterson Hall
> color=0000ff
>
> +threepio.cs.unc.edu
> display_name=West Franklin
> color=00ff00
>
> *** Targets ***
> probe = FPing
> menu = Top
> title = Network Latency Grapher
> remark = Welcome to the SmokePing website of Foo Enterprises. \
>           Here you will learn all about the latency of our network.
>
> + Threepio
> menu = Threepio
> title = This be Threepio
> slaves = artoo.cs.unc.edu
> host = threepio.cs.unc.edu
>
> + Artoo
> menu = Artoo
> title = This be Artoo
> slaves = threepio.cs.unc.edu
> host = artoo.cs.unc.edu
> =============== /CONFIGURATION ==================
>
> However, trying to load that configuration (e.g. with smokeping --
> check) results in the following error:
> ERROR: /opt/local/smokeping/etc/config, line 125: slave1 [slave2]
>
> The configuration loads without complaint if I change the 2 lines
> starting with "slaves = " to have short names instead of fully-
> qualified names, e.g.
> slaves = artoo
> and
> slaves = threepio
>
> However, that doesn't work either.  I load smokeping and try to start
> up one of the slaves and get this error:
>
> =============== ERROR ==================
> [root at artoo /tmp/smokeping-2.2.4]# bin/smokeping --master-url=http://
> chewie.net.unc.edu/cgi-bin/smokeping.cgi --cache-dir=/tmp/cache-
> smokeping --shared-secret=/tmp/smokeping_secrets
> WARNING: Data from artoo.cs.unc.edu was signed with
> Vanfzzz6rqJXCOhFjNuVNQ which does not match our expectation
>
> ERROR: we did not get config form the master. Maybe we are not
> configured as a slave for any of the targets on the master ?
> =============== /ERROR ==================
>
> I'm stumped.  I even tried messing with the source code.  I don't
> know if this matters, but I discovered that the gethostbyname() call
> on line 1905 of Smokeping.pm returned the string '???' for one of the
> slave hostnames.  That doesn't seem right, but I don't know whether
> it's relevant to my bigger issue of just getting things running.
>
> Help!
>
> Thanks,
> -Jeff T.
>
> _______________________________________________
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> smokeping-users at lists.oetiker.ch
> https://lists.oetiker.ch/cgi-bin/listinfo/smokeping-users
>
>

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902