[Xymon] Converting a xymon client to a server

Richard L. Hamilton rlhamil2 at gmail.com
Tue Sep 22 15:32:26 CEST 2020

Here's what I did to build the server - on Solaris 11 (SPARC, not that that matters); your details will vary a bit. On Solaris, the default "make" is NOT GNU make, although the latter is available as gmake; that's one thing that may vary; it'd just be "make" on Linux. pcre (perl style regular expression matching library) openssl, and openldap if you want it libraries and include files need to be installed. fping should be installed too, although I think one is included if you don't have it; remember to fix the path below if it's not in /usr/bin. I didn't actually need openldap support, but I may go crazy (for home, that'd be crazy) and set that up one day, so it's there if I want it then. The prerequisite libraries (if shared) need to be on BOTH build system and target server system, if they're not the same machine.

export MAKE=gmake
./configure --server --fping /usr/bin/fping --pcreinclude /usr/include/pcre --sslinclude /usr/include/openssl --ldapinclude /usr/include/openldap

I built my server ON the server system (in a build directory at the same level as the server directory); if you're not doing that, I suppose you could install it where you build it, and tar up the server directory and startup files and transfer the tar files to the system you want to make into the server. It might be more sensible to have two tar files, one for the startup files (which need to be right for the target distro, if that differs from the build system) with absolute paths, and one for the ~xymon/server directory, which should probably be relative to ~xymon (i.e. just be in ~xymon and tar up the server directory). The startup files have to be installed as root. You'd think the server files could be installed as xymon, but some directories have to have group id and group-writable for the web server, whatever it runs as, so you'll probably have to install them as root too. So either your xymon and web server UIDs and GIDs are the same on build and target server systems, or you'll have to fix up owner and group after untar-ing the files.

Then of course there's the question of setting up the web server process on the xymon server system, with the appropriate additions to a basic Apache (if that's what you're using) config. I'm NOT going to talk about that...except that it makes sense to me that the web server process should start BEFORE the xymon server process.

The rest below pertains to the client side.

If you use the tar files to distribute the client software (automatically after the first time a client is set up), among other things they should be relative to $XYMONCLIENTHOME; so if ~xymon is /export/home/xymon, then $XYMONCLIENTHOME is probably /export/home/xymon/client. A list of my tar file for Linux looks like:

That means if doing it by hand the first time, you want to do (as xymon):

mkdir -p ~/client
cd ~/client
tar xvf ../OS_CPU_xymonVersion_updateversion.tar

I named the tar files something like that to keep them straight, with all the different OS and CPU combos I had; the updateversion part is if I update the tar file say to include a changed ext script, without actually compiling a new version of xymon client. If you do the autoupdate, remember the matching clientversion for a client (in client-local.cfg on the server) has to be the same as the tar file name minus .tar suffix.

Note that I had some client side ext scripts; those were included. I created the tar files with logs and tmp directories cleaned out, which is a good idea.

Remember what I said, build client software on the client with the OLDEST OS version for a given OS and CPU architecture; most OS's are backwards compatible enough that the older code should run fine on the newer version of the same OS, but code built on a newer OS will usually NOT run on an older one. Of course if you have different OSs (usually different Linux distributions are ok as the same OS) or different CPU architectures (x86 32-bit, x86/64 only, SPARC, ARM, whatever), you need to build for each OS/CPU combination on the oldest OS version.

> On Sep 22, 2020, at 08:39, Gabby Gibbons <gabby.gibbons at yahoo.com> wrote:
> So, I am trying to build from source, but basically what I want to do is distribute a pre-installed xymon to multiple computers on a network, and then for the single computer that should be the server I want to be able to write a script to install the extra, server unique, packages. Can I just rerun the configure script and specify server instead and then use make to rebuild? I'm not all that familiar with building packages from source.

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