Présentation de ces outils:
Using sar you can monitor performance of various Linux subsystems (CPU, Memory, I/O..) in real time. You can also collect all performance data on an on-going basis, store them, and do historical analysis to identify bottlenecks. Sar is part of the sysstat package.
sudo apt-get install sysstat
Default settings for
Activer la collecte:
sudo vi /etc/default/sysstat # Should sadc collect system activity informations? Valid values # are "true" and "false". Please do not put other values, they # will be overwritten by debconf! ENABLED="false"
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.
netdata is a scalable, distributed, real-time, performance and health monitoring solution for Linux, FreeBSD and MacOS. It is open-source too. Out of the box, it collects 1k to 5k metrics per server per second. It is the corresponding of: top, vmstat, iostat, iotop, sar, systemd-cgtop and a dozen more console tools running in parallel. netdata is very efficient in this: the daemon needs just 1% to 3% cpu of a single core, even when it runs on IoT.
Many people view netdata as a collectd + graphite + grafana alternative, or compare it with cacti or munin. All these are really great tools, but they are not netdata. Let's see why.
My primary goal when I was designing netdata was to help us find why our systems and applications are slow or misbehaving. To provide a system that could kill the console for performance monitoring.
To do this, I decided that:
Glances est un logiciel libre (distribué sous licence LGPL) permettant de surveiller votre système d'exploitation GNU/Linux ou BSD à partir d'une interface texte. Glances utilise la librairie libstatgrab pour récupérer les informations de votre système. Il est développé en langage Python.
A Python Nagios® Core total rewrite.
(email@example.com) 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)
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.
This web user interface allow you to view in a single page almost everything about nagios and icinga : alert, ack, downtime, comment. You can also interact with nagios and icinga through ack, downtime, comment, disable and reset buttons.