Re: [Nagios-users] Nagios and Cacti
With parallel checks in Nagios 3 and some configuration tuning and well-written SNMP checks, I'd argue that Nagios is as good if not a better poller than cactid :). our instance is not huge, but currently we do 7000+ SNMP-based checks in 3 minutes on a dual quad-core Linux-based server. Before PNP I used to use Cacti and Nagios. I like Cacti, but with PNP around I would never go back to that combination again .. Nagios + PNP really does simplify life for Nagios administrators and provides a lot of flexibility as far as how you scale your graphing as your node base grows. - Max Hi Max, Do you all of your SNMP management manually? I'm still learning a lot about SNMP, and was under the impression that Cacti took a lot of the pain out of SNMP management, but I'd be interested in hearing how you administer it in your system just using Nagios + PNP4Nagios if you don't mind? Cheers, Chris -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
Re: [Nagios-users] Nagios and Cacti
That's impressive and good to hear about the high snmp performance you've
achieved with nagios.
=
Daniel Feinsmith
=
{sent from iPhone}
On Apr 9, 2009, at 4:48 AM, Christopher McAtackney crist...@gmail.com wrote:
With parallel checks in Nagios 3 and some configuration tuning and
well-written SNMP checks, I'd argue that Nagios is as good if not a
better poller than cactid :). our instance is not huge, but
currently we do 7000+ SNMP-based checks in 3 minutes on a dual
quad-core Linux-based server.
Before PNP I used to use Cacti and Nagios. I like Cacti, but with PNP
around I would never go back to that combination again .. Nagios + PNP
really does simplify life for Nagios administrators and provides a lot
of flexibility as far as how you scale your graphing as your node base
grows.
- Max
Hi Max,
Do you all of your SNMP management manually? I'm still learning a lot
about SNMP, and was under the impression that Cacti took a lot of the
pain out of SNMP management, but I'd be interested in hearing how you
administer it in your system just using Nagios + PNP4Nagios if you
don't mind?
Cheers,
Chris
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Re: [Nagios-users] Nagios and Cacti
Hi Chris, Daniel,
I write about a number of the configuration decisions we made in order
to achieve our current level of performance on my blog:
http://www.semintelligent.com/blog/?q=Nagios
Please note that a number of configuration steps we have done go
against what the Nagios documentation recommends, so if you wish to do
anything similar to what we have done, make sure you understand the
Nagios documentation and understand the risks of violating the
recommendations in it.
We have done a lot of custom development to help make implementing
SNMP-based checks across a large number of hosts easier for us:
1) We develop agent-specific checks (we currently use Net-SNMP and
SysEdge, starting to do Cisco monitoring) using perl that run clean
under ePN. These groups of checks are associated with host groups
specific to each agent type (e.g. net-snmp-host).
2) We create a custom base template for each agent type. The
template has custom attributess that associate SNMP version, community
string etc with the host template. We also use custom attributes in
each agent-specific check (e.g. CPU), so that all thresholds are
defined at the host level and we can provide default thresholds. For
example
define host {
name net_snmp_host
hostgroups +net_snmp_hosts
__snmp_version 2c
__snmp_community myreadonlycommunity
__snmp_port161
__snmp_version 2c
__snmp_storage_partitions all
__snmp_storage_warn 90
__snmp_storage_crit 95
__snmp_la_warn 15:10:5
__snmp_la_crit 30:20:10
__snmp_mem_warn free,lt,8
__snmp_mem_crit free,lt,5
__snmp_swap_warn 50
__snmp_swap_crit 65
__snmp_cpu_warn wait,gt,20
__snmp_cpu_crit wait,gt,30
...
register 0
}
for custom communities we create separate templates, e.g.
define host {
name southwest-region-host
hostgroups +southwest-hosts
__snmp_community southWestRegionCommunity
}
so now our end users can easily tell Nagios to poll their hosts with
SNMP and they can override our thresholds if they want at the host
level without having to know a thing about programming:
define host {
use generic-host, net_snmp_host, southwest-region-host
# Override CPU default thresholds
__snmp_cpu_warn wait,gt,40
...
}
3) We have developed, and hope to release sometime this year, a
perl-based, ePN friendly SNMP check script that handles counters and
gauges well, it lets you check multple SNMP OIDs at once. This has
been extremely useful for custom SNMP application agents .. a service
definition ends up looking like this:
define service {
use check_snmp_oids-base
service_descriptionCustom App - 5 minute SNMP checks
__snmp_oids_spec -O 'TimeMin:g:1.3.6.1.4.1.1900.5.5.2.2.1.0' \
-O 'labelFor1sttOid:g:1.3.6.1.4.1..1.3.0' \
-O 'labelFor2ndOid:g:1.3.6.1.4.1..1.4.0' \
-O 'labelFor3rdtOid:g:1.3.6.1.4.1..1.5.0'\
__snmp_oids_crit_spec labelFor1stoid,lt,0
hostgroup_name custom-agent-group
servicegroupscustom-service-group
}
In some cases we check 15-20 OIDs at once using this methodology.
Our script uses memcached to cache counter data to get delta output
properly and we have code that adjusts data properly for over samples,
under samples, and large deltas.
Many of our checks are based off of the code I wrote that can be
downloaded here:
http://www.nagios3book.com/nagios-3-enm/checks/
Though we have significantly enhanced things.
So, a lot of development time up front but the end result is we get
terrific performance and a lot of flexibility. We are using Nagios to
replace $$$ COTS products, so our company is happy to have us spend
time doing custom development. I realize many of you do not have that
luxury so I understand that this won't be ideal for many of you.
sorry.
Development time with two people to get to where we are now - about 3-4 months.
We have permission to release a lot of the code we have done, just
need time to package it properly for a public release .. so hopefully
we can share some of our tools and help others do something similar
without the 3-4 months development time :p.
hope this helps more than it confuses.
- Max
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Re: [Nagios-users] Nagios and Cacti
And just an FYI from my own experience... putting Nagios Cacti on the same server has been somewhat problematic for us. We have over 400 network devices between switches, routers, WAPs, etc. We also have about 300 monitored servers. Initially I had Nagios and Cacti both on one server with Cacti running via cron every 5 minutes. About every 5 minutes, my shells would become unresponsive for roughly 30 to 90 seconds. Turning off either Nagios or Cacti resolved the issue. Running both seems to have hammered the server a bit (4Gb of RAM, 2 x dual core 2.x Ghz CPUs). We don't integrate Cacti and Nagios, however. Nagios does both trending and alerts of all servers. Cacti does trending only of all network devices/ports. Once I moved Cacti to its own server, all was fine as far as load/latency went. A. Davis Email: ncc...@gmail.com There is no limit to what a man can accomplish if he doesn't care who gets the credit. - Ronald Reagan Marco Tirado wrote: Hello: There are a couple of examples in the nagios exchange page of different approachs for integrating nagios and cacti. You should check that out. I believe the synchronization is going to cost you time and money, a better approach is to use nagios + pnp4naigos (this generates nice graphs) + check_snmp_int.pl (this for bandwidth tests). That way you have only one place to place your configuration. There are tons of other snmp plugins you can use for other tests (CPU, Memory, etc), //Marco On Wed, Apr 8, 2009 at 11:15 AM, Christopher McAtackney crist...@gmail.com mailto:crist...@gmail.com wrote: Hi all, I've been looking into making use of Cacti to act as an SNMP management tool which runs alongside my Nagios instance. Ideally, what I would like to do is have Cacti monitor various SNMP-exposed metrics on my hosts, and then have a service check in Nagios which parses Cacti's results (which I believe are RRD files) and send alerts etc. Nagios itself will still be used for running directly checks for services running, errors in log files etc. Does this approach make sense? One issue that I can think of is the difficulty in keeping the config files of Nagios and Cacti synchronised. I was planning on using Lilac Platform to act as my Nagios config file management tool, but how that is kept in synch with Cacti is a problem. Has anyone ever set up an arrangement like this before? Cheers, Chris -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net mailto:Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com___ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
Re: [Nagios-users] Nagios and Cacti
2009/4/8 Andrew Davis ncc...@gmail.com: And just an FYI from my own experience... putting Nagios Cacti on the same server has been somewhat problematic for us. We have over 400 network devices between switches, routers, WAPs, etc. We also have about 300 monitored servers. Initially I had Nagios and Cacti both on one server with Cacti running via cron every 5 minutes. About every 5 minutes, my shells would become unresponsive for roughly 30 to 90 seconds. Turning off either Nagios or Cacti resolved the issue. Running both seems to have hammered the server a bit (4Gb of RAM, 2 x dual core 2.x Ghz CPUs). We don't integrate Cacti and Nagios, however. Nagios does both trending and alerts of all servers. Cacti does trending only of all network devices/ports. Once I moved Cacti to its own server, all was fine as far as load/latency went. That's useful to know Andrew, thanks. Regarding the trending of network devices - is there any reason why this can't be done by Nagios? I intend to install PNP4Nagios to take care of graphing anyway, but I think it would be nice to have all my monitored resources under the one system (for notifications and ease of administration). Is there some major advantage that Cacti provides when it comes to SNMP monitoring of network devices that cannot be achieved with Nagios and the various SNMP plug-ins available for it (e.g. like these ones http://nagios.manubulon.com) ? Cheers, Chris -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
Re: [Nagios-users] Nagios and Cacti
It depends on the intensity of your snmp usage. Cacti has a native
daemon to do large scale snmp getting, and it does a great job of it.
So if u have hundreds of devices, each with a lot of interfaces, u
will probably like cacti. The user interface is also well done for
graphing snmp data and thresholding on it using the threshold plugin.
=
Daniel Feinsmith
=
{sent from iPhone}
On Apr 8, 2009, at 8:15 AM, Christopher McAtackney
crist...@gmail.com wrote:
2009/4/8 Andrew Davis ncc...@gmail.com:
And just an FYI from my own experience... putting Nagios Cacti on
the same
server has been somewhat problematic for us. We have over 400 network
devices between switches, routers, WAPs, etc. We also have about 300
monitored servers. Initially I had Nagios and Cacti both on one
server with
Cacti running via cron every 5 minutes. About every 5 minutes, my
shells
would become unresponsive for roughly 30 to 90 seconds. Turning off
either
Nagios or Cacti resolved the issue. Running both seems to have
hammered the
server a bit (4Gb of RAM, 2 x dual core 2.x Ghz CPUs). We don't
integrate
Cacti and Nagios, however. Nagios does both trending and alerts of
all
servers. Cacti does trending only of all network devices/ports.
Once I moved
Cacti to its own server, all was fine as far as load/latency went.
That's useful to know Andrew, thanks.
Regarding the trending of network devices - is there any reason why
this can't be done by Nagios? I intend to install PNP4Nagios to take
care of graphing anyway, but I think it would be nice to have all my
monitored resources under the one system (for notifications and ease
of administration).
Is there some major advantage that Cacti provides when it comes to
SNMP monitoring of network devices that cannot be achieved with Nagios
and the various SNMP plug-ins available for it (e.g. like these ones
http://nagios.manubulon.com) ?
Cheers,
Chris
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Re: [Nagios-users] Nagios and Cacti
If you move your mysql instance to another server, you can get much
better performance on a nagios/cacti server. Check top while cacti is
running a large install and you will see that mysql is hoarding CPU
and memory resources not leaving much for nagios.
=
Daniel Feinsmith
=
{sent from iPhone}
On Apr 8, 2009, at 8:03 AM, Andrew Davis ncc...@gmail.com wrote:
And just an FYI from my own experience... putting Nagios Cacti on
the same server has been somewhat problematic for us. We have over
400 network devices between switches, routers, WAPs, etc. We also
have about 300 monitored servers. Initially I had Nagios and Cacti
both on one server with Cacti running via cron every 5 minutes.
About every 5 minutes, my shells would become unresponsive for
roughly 30 to 90 seconds. Turning off either Nagios or Cacti
resolved the issue. Running both seems to have hammered the server a
bit (4Gb of RAM, 2 x dual core 2.x Ghz CPUs). We don't integrate
Cacti and Nagios, however. Nagios does both trending and alerts of
all servers. Cacti does trending only of all network devices/ports.
Once I moved Cacti to its own server, all was fine as far as load/
latency went.
A. Davis
Email: ncc...@gmail.com
There is no limit to what a man can accomplish
if he doesn't care who gets the credit. - Ronald Reagan
Marco Tirado wrote:
Hello:
There are a couple of examples in the nagios exchange page of
different approachs for integrating nagios and cacti. You should
check that out.
I believe the synchronization is going to cost you time and money,
a better approach is to use nagios + pnp4naigos (this generates
nice graphs) + check_snmp_int.pl (this for bandwidth tests). That
way you have only one place to place your configuration. There are
tons of other snmp plugins you can use for other tests (CPU,
Memory, etc),
//Marco
On Wed, Apr 8, 2009 at 11:15 AM, Christopher McAtackney crist...@gmail.com
wrote:
Hi all,
I've been looking into making use of Cacti to act as an SNMP
management tool which runs alongside my Nagios instance.
Ideally, what I would like to do is have Cacti monitor various
SNMP-exposed metrics on my hosts, and then have a service check in
Nagios which parses Cacti's results (which I believe are RRD files)
and send alerts etc.
Nagios itself will still be used for running directly checks for
services running, errors in log files etc.
Does this approach make sense?
One issue that I can think of is the difficulty in keeping the config
files of Nagios and Cacti synchronised. I was planning on using
Lilac
Platform to act as my Nagios config file management tool, but how
that
is kept in synch with Cacti is a problem. Has anyone ever set up an
arrangement like this before?
Cheers,
Chris
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Re: [Nagios-users] Nagios and Cacti
On Wed, Apr 8, 2009 at 11:52 AM, Daniel Emmanuel Feinsmith dan...@danielemmanuelfeinsmith.com wrote: It depends on the intensity of your snmp usage. Cacti has a native daemon to do large scale snmp getting, and it does a great job of it. So if u have hundreds of devices, each with a lot of interfaces, u will probably like cacti. The user interface is also well done for graphing snmp data and thresholding on it using the threshold plugin. With parallel checks in Nagios 3 and some configuration tuning and well-written SNMP checks, I'd argue that Nagios is as good if not a better poller than cactid :). our instance is not huge, but currently we do 7000+ SNMP-based checks in 3 minutes on a dual quad-core Linux-based server. Before PNP I used to use Cacti and Nagios. I like Cacti, but with PNP around I would never go back to that combination again .. Nagios + PNP really does simplify life for Nagios administrators and provides a lot of flexibility as far as how you scale your graphing as your node base grows. - Max -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
Re: [Nagios-users] Nagios and Cacti
I agree. Initially I had Nagios doing all the trending. But with 400+
network devices and many of them with multiple 48 port blades, I found
Cacti was easier to configure... it scaled a lot better. For a smaller
network, you could easily do just Nagios. I've had no issues at all with
Nagios + PNP for alerts and trending. In fact, Nagios still watches my
core network devices (but not all the ports of them... ie: Nagios
watches that switch1 is up and available and trends its CPU and memory
usage... however I use Cacti for trending the 6 blades each with 48
ports in switch1). This way, if switch1 fails or utilization is too
high, Nagios tells me, but if a particular user is hogging all our
bandwidth or having lots of packet loss, I find that via Cacti.
A. Davis
Email: ncc...@gmail.com
There is no limit to what a man can accomplish
if he doesn't care who gets the credit. - Ronald Reagan
Daniel Emmanuel Feinsmith wrote:
It depends on the intensity of your snmp usage. Cacti has a native
daemon to do large scale snmp getting, and it does a great job of it.
So if u have hundreds of devices, each with a lot of interfaces, u
will probably like cacti. The user interface is also well done for
graphing snmp data and thresholding on it using the threshold plugin.
=
Daniel Feinsmith
=
{sent from iPhone}
On Apr 8, 2009, at 8:15 AM, Christopher McAtackney
crist...@gmail.com wrote:
2009/4/8 Andrew Davis ncc...@gmail.com:
And just an FYI from my own experience... putting Nagios Cacti on
the same
server has been somewhat problematic for us. We have over 400 network
devices between switches, routers, WAPs, etc. We also have about 300
monitored servers. Initially I had Nagios and Cacti both on one
server with
Cacti running via cron every 5 minutes. About every 5 minutes, my
shells
would become unresponsive for roughly 30 to 90 seconds. Turning off
either
Nagios or Cacti resolved the issue. Running both seems to have
hammered the
server a bit (4Gb of RAM, 2 x dual core 2.x Ghz CPUs). We don't
integrate
Cacti and Nagios, however. Nagios does both trending and alerts of
all
servers. Cacti does trending only of all network devices/ports.
Once I moved
Cacti to its own server, all was fine as far as load/latency went.
That's useful to know Andrew, thanks.
Regarding the trending of network devices - is there any reason why
this can't be done by Nagios? I intend to install PNP4Nagios to take
care of graphing anyway, but I think it would be nice to have all my
monitored resources under the one system (for notifications and ease
of administration).
Is there some major advantage that Cacti provides when it comes to
SNMP monitoring of network devices that cannot be achieved with Nagios
and the various SNMP plug-ins available for it (e.g. like these ones
http://nagios.manubulon.com) ?
Cheers,
Chris
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Re: [Nagios-users] Nagios and Cacti
Is there some major advantage that Cacti provides when it comes to SNMP monitoring of network devices that cannot be achieved with Nagios and the various SNMP plug-ins available for it (e.g. like these ones http://nagios.manubulon.com) ? Also does anyone have some nagios config examples integrating PNP and these SNMP plugins... I have been trying to get an idea how to create the commands.cfg and services.cfg using these parts... Any examples of host based checks would be great. I have tried to read the relevant docs but have not found explicit nagios .cfg examples... if they exist a gentle pointer would also be great. thank you, Giovanni -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
Re: [Nagios-users] Nagios and Cacti
I agree with Daniel's post below. We have Nagios and Cacti running on the
same system; Nagios monitors 691 hosts and 1800 services while Cacti is
pulling stats for about the same number of hosts, but something like 3200
data sources. They run on a dual Xeon 2.8 Ghz box with only 2 Gb or RAM
(no swapping going on). Average load is about 1.5 and peaks at 3 about 3-4
times a day.
The key is that mysql operations are on a dedicated box with 15k SCSI
drives and RAID 10.
James Moseley
Daniel Emmanuel
Feinsmith
dan...@danielemm To
anuelfeinsmith.co ncc...@gmail.com
mncc...@gmail.com
cc
04/08/2009 10:36 Nagios Users
AMNagios-users@lists.sourceforge.net
Subject
Re: [Nagios-users] Nagios and Cacti
If you move your mysql instance to another server, you can get much better
performance on a nagios/cacti server. Check top while cacti is running a
large install and you will see that mysql is hoarding CPU and memory
resources not leaving much for nagios.
=
Daniel Feinsmith
=
{sent from iPhone}
On Apr 8, 2009, at 8:03 AM, Andrew Davis ncc...@gmail.com wrote:
And just an FYI from my own experience... putting Nagios Cacti on
the same server has been somewhat problematic for us. We have over
400 network devices between switches, routers, WAPs, etc. We also
have about 300 monitored servers. Initially I had Nagios and Cacti
both on one server with Cacti running via cron every 5 minutes. About
every 5 minutes, my shells would become unresponsive for roughly 30
to 90 seconds. Turning off either Nagios or Cacti resolved the issue.
Running both seems to have hammered the server a bit (4Gb of RAM, 2 x
dual core 2.x Ghz CPUs). We don't integrate Cacti and Nagios,
however. Nagios does both trending and alerts of all servers. Cacti
does trending only of all network devices/ports. Once I moved Cacti
to its own server, all was fine as far as load/latency went.
A. Davis
Email: ncc...@gmail.com
There is no limit to what a man can accomplish
if he doesn't care who gets the credit. - Ronald Reagan
Marco Tirado wrote:
Hello:
There are a couple of examples in the nagios exchange page of
different approachs for integrating nagios and cacti. You
should check that out.
I believe the synchronization is going to cost you time and
money, a better approach is to use nagios + pnp4naigos (this
generates nice graphs) + check_snmp_int.pl (this for bandwidth
tests). That way you have only one place to place your
configuration. There are tons of other snmp plugins you can
use for other tests (CPU, Memory, etc),
//Marco
On Wed, Apr 8, 2009 at 11:15 AM, Christopher McAtackney
crist...@gmail.com wrote:
Hi all,
I've been looking into making use of Cacti to act as an SNMP
management tool which runs alongside my Nagios instance.
Ideally, what I would like to do is have Cacti monitor
various
SNMP-exposed metrics on my hosts, and then have a service
check in
Nagios which parses Cacti's results (which I believe are RRD
files)
and send alerts etc.
Nagios itself will still be used for running directly checks
for
services running, errors in log files etc.
Does this approach make sense?
One issue that I can think of is the difficulty in keeping
the config
files of Nagios and Cacti synchronised. I was planning on
using Lilac
Platform to act as my
