I recently learned about Ubuntu Landscape - but for my purpose it's an overkill, and seems that it's not free.
I have 3 servers, and I want to visit a single website that gives me a quick summary of the load of those servers. Same information that can be obtained by top, uptime and who.
Is there something already available server/client?
Is there something already available server/client?
Certainly, yes.
Here's what I've found on the subject... There are many options, as you might expect. And certainly more than those I've found and listed here..
As explained here:
Munin the tool surveys all your computers and remembers what it saw. It presents all the information in in graphs through a web interface. Its emphasis is on plug and play capabilities. After completing a installation a high number of monitoring plugins will be playing with no more effort. Using Munin you can easily monitor the performance of your computers, networks, SANs, and quite possibly applications as well. It makes it easy to determine “what’s different today” when a performance problem crops up.
Munin is available from apt. Personally, I'd try Munin first.
As explained here:
Nagios is an open source host, service and network monitoring program. It is composed by the main service and a set of plugins which makes it very flexible as they can be developed by anyone. Nagios provides a web interface for the user to monitor but it also is capable of sending emails or even messages to a pager in case of problems.
You can install it via apt:
sudo apt-get install nagios2 nagios-plugins nagios-images
There are some additional configuration steps to follow, please refer to the above link.
Alternatively...
As explained here:
Logwatch is a tool that will monitor your server's logs and email the administrator a digest on a daily basis.
Logwatch is also available from apt:
sudo apt-get install logwatch
Note that you'll also need to setup sendmail or something so it can email you reports.
If I were to make my own server monitoring web application, I may use logwatch as a part of a backend for that...
As explained here:
Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality. Cacti provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features out of the box. All of this is wrapped in an intuitive, easy to use interface that makes sense for LAN-sized installations up to complex networks with hundreds of devices.
