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Thanks Aaron -
I've been meaning to get health_check.pl running but each time I try
I get the following warnings and after 10 minutes or so, no output so
I deferred until I had more time to delve into the script.
Is this output normal?
Thanks
Gary
- ---------------
Prototype mismatch: sub VCL::health_check::help: none vs () at
./health_check.pl line 62 (#1)
(S prototype) The subroutine being declared or defined had
previously been
declared or defined with a different function prototype.
Prototype mismatch: sub VCL::health_check::help: none vs () at
./health_check.pl line 163 (#1)
Subroutine help redefined at ./health_check.pl line 152 (#2)
(W redefine) You redefined a subroutine. To suppress this
warning, say
{
no warnings 'redefine';
eval "sub name { ... }";
}
Use of uninitialized value in concatenation (.) or string at
/usr/local/vcl/bin/../lib/VCL/utils.pm line 7651 (#3)
(W uninitialized) An undefined value was used as if it were already
defined. It was interpreted as a "" or a 0, but maybe it was a
mistake.
To suppress this warning assign a defined value to your variables.
To help you figure out what was undefined, perl tells you what
operation
you used the undefined value in. Note, however, that perl
optimizes your
program and the operation displayed in the warning may not necessarily
appear literally in your program. For example, "that $foo" is
usually optimized into "that " . $foo, and the warning will refer to
the concatenation (.) operator, even though there is no . in your
program.
Use of uninitialized value in string eq at
/usr/local/vcl/bin/../lib/VCL/Module/Provisioning/VMware/VMware.pm
line 308 (#3)
Use of uninitialized value in pattern match (m//) at
/usr/local/vcl/bin/../lib/VCL/healthcheck.pm line 480 (#3)
Use of uninitialized value in concatenation (.) or string at
/usr/local/vcl/bin/../lib/VCL/healthcheck.pm line 494 (#3)
Use of uninitialized value in pattern match (m//) at
/usr/local/vcl/bin/../lib/VCL/healthcheck.pm line 283 (#3)
Use of uninitialized value in concatenation (.) or string at
/usr/local/vcl/bin/../lib/VCL/healthcheck.pm line 343 (#3)
- ----------------
Aaron Coburn wrote the following on 4/19/2013 11:41 AM:
> Hi, Folks,
>
> Many of you probably already use the 'health_check.pl' script to
> monitor your VCL system. If you are not familiar with it, it
> resides in
>
> $VCL_HOME/bin/health_check.pl
>
> It can be run directly from the command line or set to run on a
> cron job. It verifies that each computer (for a given management
> node) is operating properly. It also can be used to power down
> compute nodes (though I have never used it for this purpose).
>
> The script is really solid, but it can take a long time to
> complete, especially if your management nodes each control a large
> number of machines. In my experience, it typically takes about 10
> minutes for every 50 computers. This isn't necessarily a problem,
> but if I want to just get a quick snapshot of the overall system
> health, it is sometimes too long to wait.
>
> So, I wrote a node.js module [1] that runs *significantly* faster
> -- that is, it checks an entire system in only a few seconds. It is
> also a comparatively much lighter load on the management node (no
> externally spawned processes, only a single database query, etc).
>
> The module allows you to write a complete monitoring script like
> so:
>
> ============================== var health =
> require('vcl-utils').Health;
>
> health.on('error', function(err) { console.log('ERROR :: ' + err);
> });
>
> health.on('info', function(msg) { console.log('INFO :: ' + msg);
> });
>
> health.check(); ==============================
>
> Let me know if you have any questions or if you have ideas for
> improving this.
>
> Best regards,
>
> Aaron
>
>
> [1] https://github.com/acoburn/vcl-utils
>
>
>
> -- Aaron Coburn Systems Administrator and Programmer Academic
> Technology Services, Amherst College
> [email protected]<mailto:[email protected]>
>
>
>
>
- --
Gary Trail
Director of Network Services
Rensselaer Hartford Graduate Center
860-548-7869
[email protected]
- ----------------------
Go Green, Keep it on the Screen
Please Consider the Environment
Before Printing this Message.
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