Collectd is a daemon which collects system performance statistics periodically and stores them in RRD files. Statistics will be displayed inside a web interface, named
- Collectd Graph Panel (CGP), package nethserver-cgp
The web interface will create a random URL accessible from the Applications tab inside the Dashboard. It’s possible to share the random URL to let non-authenticated users view graphs. Access is allowed only from the zones and IP addresses of the http-admin service (see Network services).
After installation, the system will gather following statistics:
- CPU usage
- system load
- number of processes
- RAM memory usage
- virtual memory (swap) usage
- system uptime
- disk space usage
- disk read and write operations
- network interfaces
- network latency
For each metric, the web interface will display a graph containing the last collected value and also minimum, maximum and average values.
The ping plugin measure network latency. At regular intervals, it sends an ICMP ping to the configured upstream DNS. If the multi WAN module is configured, any enabled provider is also checked.
Additional hosts could be monitored (i.e. a web server) using a comma separated list of hosts inside the
config setprop collectd PingHosts www.google.com,www.nethserver.org signal-event nethserver-collectd-update