In this post we will see how Nagios can help us monitor the existence of snapshots in our virtual infrastructure, Everyone knows the danger of having snapshots or leaving them for long periods… Hanging backups that leave half-baked snapshots… To combat this, We'll automate a periodic check-in with a great script!
Let's start getting more out of monitoring, Something fun and enjoyable to watch, at least something different and it doesn't have to be as technical as it has been until now. We are going to integrate into our Nagios and/or Centreon a layer of visualization of interactive maps or drawings, it is nothing more than taking the monitored items to fully customized live drawings, are drawings of logical schemes, of photos of the DPC, SMTP traffic… of what our imagination gives us!
We continue with more things that we can monitor with Nagios or Centreon! If we have an HP MSA storage array in our organization, either fiber or iSCSI, This is your document! In a simple way, we can absorb the information that we are interested in controlling through SNMP, Be the state of the hard drives, The controllers, Volumes, RAID, Temperatures, Chassis Condition, Alerts, etc, etc…
Another very common and simple check at the same time is the monitoring of a TCP port if it is up and responds in an adequate time. In this document, We will see how to monitor the availability of some ports offered by our servers, are critical ports like 80TCP for our websites, 25TCP for Mail Servers…
Once we have our Windows computers monitored, perhaps we are interested in monitoring something as critical as the services they offer, No? Also, through SNMP we will be able to consult if SQL services, Exchange or any other service that has your computer installed is up or down.
In this document, we'll look at all the steps needed to be able to monitor an ESXi host, we will see the most common parameters and the values that we can obtain to have a controlled environment thanks to Nagios and Centreon! All the information we can obtain is amazing! In other documents we will see other information that we can obtain from vCenter and its VMs, Today the hosts are playing!
In this document we will start with something easy, we are going to monitor our first Windows computer, whether it is a Desktop or a Server. We will monitor the basics through SNMP, be CPU usage, RAM, Disk, Net, Swap Memory and Ping. With this we will have a first base to then add more elements that we need to monitor!!!
This will be the document that we must follow if we want to enable Nagios and Centreon alerts through the use of email and thus receive the alerts in our monitoring system, when a host or service changes status to Warning, Critical, and so on.
Well, before continuing with more configuration posts about Centreon, We make a stop along the way, Let's go with something more entertaining, We will see a small example of what we will be able to monitor. And what less than to start monitoring our own Centreon appliance and thus start to see some possibilities and get ideas!
Continuing with the monitoring posts with Nagios, We will continue with this second document, where we will first take a brief walk through some parts of the console to know what juice we can get. And then we'll enable some basic settings to start booting, which will be nothing more than importing some templates to easily start monitoring!
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Windows Server – VMware vSphere – Citrix Virtual Apps & Desktops – Centreon
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