Cron Confusion.. Continued... *ugh*
jeff.howard at centrelink.gov.au
jeff.howard at centrelink.gov.au
Wed Sep 7 01:38:40 EDT 2005
Hi All,
I did some digging in version 3.2 on this issue and ended up using the
system "cron" utility to call a script which makes use of "argusctl" to do
the override thing.
>From memory, there was something to do with the use of "0" in the time
spec. - notice Scott's timespec. doesn't have any zeros in it. From
memory, the 0 was handled the same as no value (undef) in the logic of
one of the sub-routines in Cron.pm. The result was that the job was
executed once, but when the code tried to reschedule it silently failed.
With my external "cron" script being stable, I haven't needed to look at
3.3 with respect to this problem.
Prehaps, if you use "59 3 * * *" as your timespec you'll get pretty much
what you want? With the 6 fields in the example, and the run-once
behaviour of the internal cron facility, I have just stuck with the
external script. The following doesn't address your problem directly but
might be of interest:
The script I use does some of the expected minimal input checking and then
invokes the following
argusctl override \
object=$object \
user="*external cronjob*" \
text="expected nightly maintenance downtime" \
mode=manual \
expires=$relexpires
where "$object" is a given object name in the "Top:..." format and
"$relexpires" is the calculated "epoch" value for when the override should
expire.
The following is what I get in the argus log for an override of 13 hours
from 6pm using the script snippet shown above on a argus-3.2 system:
Wed 7 Sep 07:00:06 2005 override OVERRIDE - removed by system
Wed 7 Sep 07:00:06 2005 override OVERRIDE - expired
Tue 6 Sep 23:47:37 2005 override TRANSITION - override
Tue 6 Sep 18:00:04 2005 up OVERRIDE - enabled by *external
cronjob*
Tue 6 Sep 18:00:04 2005 up OVERRIDE - expected nightly
maintenance downtime
Hope this helps.
---
Cheers, Jeff
"Scott Hiemstra" <scott at hiemstra.us>
Sent by: arguslist-bounces at tcp4me.com
07/09/2005 01:11 PM
Please respond to Discussion about Argus
To: "'Discussion about Argus'" <arguslist at tcp4me.com>
cc:
Subject: RE: Cron Confusion.. Continued... *ugh*
Reference:
Expires on
Jason,
I use the cron directive for nightly maintenance and it seems to work
fine,
I get my nightly overrides and I don't get paged so I consider it success.
Here is the config I use regarding cron:
Host "webserver" {
hostname: webserver.domainname.com
graph: yes
Service Ping {
cron "59 12 * * *" {
func: override
expires: 600
mode: manual
text: nightly maintenance
}
}
Scott
> -----Original Message-----
> From: arguslist-bounces at tcp4me.com [mailto:arguslist-bounces at tcp4me.com]
> On Behalf Of Jason 'XenoPhage' Frisvold
> Sent: Tuesday, September 06, 2005 10:59 PM
> To: Discussion about Argus
> Subject: Re: Cron Confusion.. Continued... *ugh*
>
> Hi all,
>
> I haven't seen a response to the below message, so I'm re-posting it.
> Does anyone know the answer to this? Is anyone using the cron feature?
>
> Thanks!
>
> Jason 'XenoPhage' Frisvold wrote:
>
> >*Help!*
> >
> >I'm apparently missing something, or doing something wrong, or maybe
> >even completely misunderstanding this feature.. The goal is to
> >automatically override at 4 am, for an hour. The example on the
> >documentation page of the site actually has 6 fields in the cron
> >command, but I was told previously that that was incorrect...
> >
> >I'm running Argus dev-20050720
> >
> >So, here's a snippet of my config. Can someone please tell me what I'm
> >doing wrong??
> >
> > Service SYS/disk {
> > uname: usr2
> > label: usr2
> > arg: /usr2
> > graph: yes
> > maxvalue: 5
> > cron "0 4 * * *" {
> > func: override
> > text: Backup In Progress
> > expires: 3600
> > mode: manual
> > }
> > }
> >
> >This is from the log last night :
> >
> >Wed 31 Aug 04:49:27 2005 up TRANSITION - up
> >Wed 31 Aug 04:24:27 2005 down TRANSITION - down
> >
> >
> >It *did* work.. once... :
> >
> >Wed 24 Aug 05:00:49 2005 up OVERRIDE -
removed by system
> >Wed 24 Aug 05:00:49 2005 up OVERRIDE -
expired
> >Wed 24 Aug 04:44:27 2005 up TRANSITION - up
> >Wed 24 Aug 04:00:49 2005 down OVERRIDE -
enabled by *internal-
> cronjob*
> >Wed 24 Aug 04:00:49 2005 down OVERRIDE - Backup
In Progress
> >
> >
> >
> >
>
>
> --
> ---------------------------
> Jason 'XenoPhage' Frisvold
> Engine / Technology Programmer
> friz at godshell.com
> RedHat Certified - RHCE # 803004140609871
> MySQL Pro Certified - ID# 207171862
> MySQL Core Certified - ID# 205982910
> ---------------------------
> "Something mysterious is formed, born in the silent void. Waiting alone
> and unmoving, it is at once still and yet in constant motion. It is the
> source of all programs. I do not know its name, so I will call it the
Tao
> of Programming."
>
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