Server Monitoring
- Outils
  - MRTG
  - Nagios
  - Zabbix
  - SNM
  - CACTI
  - Ovh
  - Snort
  - OpenPOM
- Services
  - Server Density
  - pingdom

Server Monitoring

Outils

top - Process Activity Command
vmstat - System Activity, Hardware and System Information
w - Find Out Who Is Logged on And What They Are Doing
uptime - Tell How Long The System Has Been Running
ps - Displays The Processes
free - Memory Usage
iostat - Average CPU Load, Disk Activity (package “sysstat”)
sar - Collect and Report System Activity (package “sysstat”)
mpstat - Multiprocessor Usage (package “sysstat”)
pmap - Process Memory Usage
netstat - Network Statistics
ss - Network Statistics
iptraf - Real-time Network Statistics (package “iptraf”)
tcpdump - Detailed Network Traffic Analysis
strace - System Calls
/Proc file system - Various Kernel Statistics
lsof - list open files, network connections and much more.
nmap - scan your server for open ports.
ntop web based tool - ntop is the best tool to see network usage in a way similar to what top command does for processes i.e. it is network traffic monitoring software. You can see network status, protocol wise distribution of traffic for UDP, TCP, DNS, HTTP and other protocols.
mtr - mtr combines the functionality of the traceroute and ping programs in a single network diagnostic tool. Finding out a bad or simply overloaded network link with Linux/UNIX oses

Présentation de ces outils:

http://www.cyberciti.biz/tips/top-linux-monitoring-tools.html

Server And Network Monitoring. Nagios is a popular open source computer system and network monitoring application software. You can easily monitor all your hosts, network equipment and services. It can send alert when things go wrong and again when they get better.

FAN is “Fully Automated Nagios”. FAN goals are to provide a Nagios installation including most tools provided by the Nagios Community. FAN provides a CDRom image in the standard ISO format, making it easy to easilly install a Nagios server. Added to this, a wide bunch of tools are including to the distribution, in order to improve the user experience around Nagios.

Voir /informatique/MRTG

Nagios

Zabbix

(sd-basic@ml.ovh.net) Ca marche plutôt bien mais les anciennes versions consomment énormément de CPU sur le serveur (a priori réglé dans la 1.6, mais j’ai pas encore testé)

SNM

http://snm.sourceforge.net/

CACTI

Web-based Monitoring Tool. 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. It can provide data about network, CPU, memory, logged in users, Apache, DNS servers and much more. See how to install and configure Cacti network graphing tool under CentOS / RHEL.

http://www.cacti.net/