Applications or appliances that observe machines, systems and networks to find problems and notify administrators.

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8
votes
1answer
909 views

How to manage Nagios dependencies on big clusters?

I'm using quite a big nagios configuration (about 4000 services), without any dependencies. This results in a huge mess of notifications when something goes wrong. I try to look for best practices ...
8
votes
2answers
2k views

Public hosts for ping

For my firewall scripts to determine whether my ISP is up I need a few reliable, geographically distributed addresses to ping. I could just use some major sites like Google, Akamai, etc. But that ...
8
votes
3answers
464 views

Using revision control for Windows server configuration?

Does anyone have experience with Puppet or cfengine like setups for a Windows server environment? Is there such a thing? I am looking to track configuration file and file security changes over a ...
8
votes
1answer
282 views

How to automate zabbix web scenarios for vhosts?

I'm new to Zabbix and enterprise monitoring. I've just finished installing Zabbix 2.4. I'm trying to monitor the state of all our vhosts dislocated on different servers. Until now the only solution ...
7
votes
12answers
5k views

How can I monitor employees computer activity?

My manager was wondering if I could monitor employees activity such as Internet history, email messages (email hosted externally) and other applications like LimeWire and Solitaire. I am managing ...
7
votes
9answers
5k views

Linux: How to find out whether the harddrive is causing a bottleneck?

I'm not asking how to find out where a bottleneck is. I just what to know how to check if the harddrive is being used at its limit (and hence causing a bottleneck). Something like top where I can see ...
7
votes
5answers
33k views

What Warning and Critical values to use for check_load?

Right now I am using these values: # y = c * p / 100 # y: nagios value # c: number of cores # p: wanted load procent # 4 cores # time 5 minutes 10 minutes 15 minutes # warning: 90% ...
7
votes
7answers
10k views

Colour tail of Apache logs

Monitoring apache logs with tail –f tends gets very frustrating for the eyes after a while. Are there any tool/options to colorize the log outputs? Maybe signal FATAL with red, etc...
7
votes
4answers
692 views

What's the common practice of when to update a soon expiring SSL certificate?

Recently Windows Azure Storage SSL certificate expired and that causes a lot of problems. Now the certificate can be retrieved by any user and so everyone could have noticed that it was going to ...
7
votes
6answers
10k views

Simple web server monitoring (alive)

Any tip about software to monitor if a web server is up and running on linux ? It should be able to run with not knowing anything more than the URL. And it must have functionality to send an email ...
7
votes
6answers
732 views

How would you measure the amount of atmospheric dust in a server room?

We've been advised by our tape library vendor that one of the reasons we might be seeing lots of errors is if our server room is particularly dusty. It doesn't look dusty, but that's not to say it's ...
7
votes
9answers
17k views

Using a laptop as an external monitor and keyboard for a server?

Is there a way to use an old laptop as an external keyboard and monitor for my rack servers?
7
votes
1answer
8k views

how to set up monit to monitor disk-space

I use monit on my server to monitor apache and mysql running. Now I want to add an alert if the disk gets too full. I added this for testing in /etc/monit/monitrc: check device rootfs with path /dev/...
7
votes
3answers
4k views

Monitor system CPU / system calls in Linux

I have a couple processes that are eating up a lot of system CPU time (as determined by looking at vmstat). Is there an easy way to find out what kind of system calls are being made? I know there ...
7
votes
6answers
4k views

Monitor the shell activity of a user on your Unix system?

Trust, but verify. Let's say I want to hire someone a sysadmin, and give them root access to my Unix system. I want to disable X windows for them, only allow shell usage (through SSH, maybe), so that ...
7
votes
6answers
3k views

Good Windows event log analyzing/reporting tool?

I'm looking for a Windows eventlog analyzing and monitoring software for Windows Server 2000/2003 (there are some new features in Windows Server 2008.) The feature set should include: real-time ...
7
votes
6answers
19k views

What is the Best Way to Monitor Server Temperature?

I need to be able to monitor the temperature of a couple of servers remotely. Does anyone know of any free/cheap software that will monitor the server temp and email it or at least output it so that ...
7
votes
6answers
7k views

Distributed Nagios Installation

I'm looking for a plug-in or product that will act as a remote probe and perform tests then send back the results to the central Nagios server. Reason for this is that I'd like to monitor internal ...
7
votes
1answer
11k views

How do I remotely install, configure and maintain SNMP?

I'm looking to remotely install the SNMP and SNMP WMI Provider services on Windows Server 2008 R2, configure specific options for the Agent, Traps, and Security tabs, then make sure these services and ...
7
votes
4answers
5k views

Good methods for monitoring EC2 instances

I'd like to hear your approaches for monitoring Linux instances running in EC2. I'm very accustomed to using Nagios to monitor all manner of aspects of a Web-based application's ecosystem, but its ...
7
votes
1answer
2k views

Linux Process Accounting - Difference between 'cp' and 'cpu' fields?

I've been looking at using process accounting for keeping track of various users and sites running scripts that are problematic in our environment instead of trying to do something like scraping top ...
7
votes
3answers
656 views

ssh host key certificates, find validity period remotely?

I have an environment where I use ssh certificates to authenticate ssh host keys. I'm talking about the kind of certificates created by running ssh-keygen -s /path/to/ca -h .... These certificates are ...
7
votes
2answers
10k views

Monitor VM's resources (CPU, RAM etc)

I'm testing Openstack and i'd like to know how can i find out about resource utilization inside instances (Virtual Machines). Openstack uses kvm, qemu and libvirt in my testing environment. Is there ...
7
votes
2answers
515 views

Detecting server abuse

Is there any standard way to prevent shared web servers from being abused? I run a CPanel box with a few people on it, and I get the occasional person that decides to use it to DoS other websites. ...
7
votes
3answers
5k views

Is there a way to share S.M.A.R.T. data over SNMP?

Is there a way to share S.M.A.R.T. data over SNMP? I'd like to be able to make cacti graphs of it and hook it up to Nagios. What I want to do is be able to get some statistics on my harddisks ...
7
votes
1answer
1k views

ext3 file system performance tuning: what metrics to monitor

I have a high-IO application that is working, and scaling well to date. Over the past few months we've been trying to look down the road and predict where our next bottlenecks will occur. One of ...
7
votes
1answer
2k views

Why should I care about NTP Kernel statistics?

I'ved noticed that munin graphs a few bits of information about timing/kernel statistics that I've never quite understood. Most of my servers seem to stay close to 0, which I presume is good, but one ...
7
votes
1answer
1k views

How to monitor passenger with monit

I want to set up monit to monitor passenger but everything I've found so far has basically said just monitor your website using monit. If possible I'd like to monitor passenger directly so I have more ...
7
votes
3answers
1k views

How should I manage per-user bandwidth?

Users often run bandwidth intensive applications - peer-to-peer applications, video, etc. Do you monitor and/or cap per-user bandwidth?
7
votes
1answer
7k views

How to migrate all Cacti devices from 5 minute polls to 1 minute polls?

I have just taken over a Cacti server and am having a nightmare moving from 5 minute polls to 1 minute polls. So far, I have changed the data template along with the Step (from 300 down to 60) and ...
7
votes
5answers
355 views

Total SA/Engineer Management Software

So, as we've seen all over server fault, and over the years I've built several of each system, System / Network Monitoring (I use nagios) System / Network Trending (I use Cacti) Centralized Log ...
7
votes
3answers
2k views

How to display a graph only for business hours with CACTI?

I have noticed that I can only display an uninterrupted period with CACTI. I am wondering whether is possible or not to make a custom graph which displaying only the business hours during a period (a ...
6
votes
13answers
3k views

Do you have a creative use for nagios?

I'm looking for inspirations on nonstandard uses of monitoring systems like nagios, which is normally used to check whether HTTP is reponding etc. I'm curious how people have taken the simple nagios ...
6
votes
4answers
22k views

Simple way of restarting crashed processes?

I need to monitor several processes running on my webserver. For some reason, varnish currently crashes once every day or two. I'm using monit to supposedly restart varnish automatically, but it doesn'...
6
votes
8answers
1k views

Monitor MySQL Replication

What is the best practice for monitoring a slave to make sure that it is a) Still running b) Not too far being the master I would like to alert by email if it is behind, happy to write a script or ...
6
votes
4answers
15k views

How to see incoming IPs in Linux?

I am wondering what is the command/utility to have a real-time view of incoming IPs to my server, ideally along with the port and connected.
6
votes
9answers
2k views

What tool do you use to monitor your clients?

Well, we had "What tool do you use to monitor your servers?", and I wondered, do you (and should you) monitor your clients (desktops and laptops)? What tools are useful for this? It seems to me that ...
6
votes
8answers
8k views

how to write a script that only acts on new log entries

I feel like this should be a simple thing but I am having a hard time figuring it out. I am trying to write a script that will monitor one of the apache log files and take some specific action. But ...
6
votes
10answers
3k views

Server health monitoring software [closed]

Hey all! I am looking for some software to monitor the health status of our servers. Our environment is a pretty typical mix of HP/Dell running Microsoft Server and VMware vSphere. We are currently ...
6
votes
4answers
7k views

Nagios remote monitoring: NRPE Vs. SSH

We use Nagios to monitor quite a few (~130) servers. We monitor CPU, Disk, RAM and a few other things on each server. I've always used SSH to run the remote commands, purely because it requires little ...
6
votes
2answers
3k views

Is there a way to exclude specific hosts from a Nagios hostgroup?

I have a Nagios server which includes many hostgroups. One of these hostgroups include a server which I'd like to exclude from being checked for one specific Nagios Check but I want it to keep being a ...
6
votes
6answers
13k views

Use Nagios to monitor a log file and send log details

I know Nagios can monitor and alert on the content within a log file, but does anyone know of a plug-in, or other tool, that will monitor a log file for a particular string and then send the entire ...
6
votes
4answers
12k views

Monitoring hardware RAID on VMWare ESXi

I've got an ESXi 3.5 server on "unsupported" hardware - SuperMicro motherboard, Adaptec 9410 3405 RAID controller (oops, the 9410 is the onboard controller that's not being used for RAID) - and I'm ...
6
votes
5answers
31k views

Monitoring Bandwidth Usage (Per Internal IP) - Cisco ASA 5505

I manage a small network with a Cisco ASA 5505 and a shared DSL connection. I would like to be able monitor the bandwidth usage of the various users/devices on my network (by IP address). Can I do ...
6
votes
8answers
3k views

Deployment and monitoring tools for java/tomcat/linux environment [closed]

I'm a developer for many years, but don't have tons of experience in ops, so apology if this is a newbe question. In my company we run a web service written in Java mainly based on a Tomcat web ...
6
votes
5answers
8k views

What is the difference between nagios xi and cacti for monitoring?

Nagios XI (This is a commercial implementation of Nagios) can graph as well as send alerts based on threshold conditions. I am not able to understand the difference between Nagios and Cacti. Any idea ...
6
votes
2answers
15k views

Disk/RAID Monitoring for HP Proliant Servers and Ubuntu 12.04

How can I monitor the status of the hard disks and the RAIDs of an HP Proliant server using Ubuntu 12.04. In Ubuntu 10.04 I could use the cciss-vol-status to query the RAID status periodically but ...
6
votes
4answers
2k views

What metrics should I monitor on my Linux-server?

I've been tasked with setting up monitoring of 300 servers, doing different things. I've been looking at various tools, such as Nagios, Munin, and others - so I got a pretty good idea on how I can ...
6
votes
4answers
4k views

Can Monit be configured to never unmonitor/timeout a service?

Monit seems to give up restarting a service if it fails a few times, and unmonitors it. I can’t find anything in the documentation about the specifics of when or why. My Monit config would be setup ...
6
votes
6answers
2k views

Best OpenSource Monitoring Tool? [closed]

I'm trying to decide between Zenoss and GroundWork. I need an enterprise level monitoring tool and I had heard really good comments of these tools. Do any of you have implemented them? Which are ...