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|
=======
Glances
=======
This manual describes *Glances* version 2.4.
Copyright © 2011-2015 Nicolas Hennion <nicolas@nicolargo.com>
April 2015
.. contents:: Table of Contents
Introduction
============
Glances is a cross-platform curses-based system monitoring tool which
aims to present a maximum of information in a minimum of space, ideally
to fit in a classical 80x24 terminal or higher to have additional
information. It can adapt dynamically the displayed information depending
on the terminal size.
Glances can also work in client/server mode. Remote monitoring could be
done via terminal or web interface.
Glances is written in Python and uses the `psutil`_ library to get
information from your system.
Console (80x24)
.. image:: images/screenshot.png
Full view (>80x24)
.. image:: images/screenshot-wide.png
Web interface (Firefox)
.. image:: images/screenshot-web.png
Usage
=====
Standalone Mode
---------------
Simply run:
.. code-block:: console
$ glances
Client/Server Mode
------------------
If you want to remotely monitor a machine, called ``server``, from
another one, called ``client``, just run on the server:
.. code-block:: console
server$ glances -s
and on the client:
.. code-block:: console
client$ glances -c @server
where ``@server`` is the IP address or hostname of the server.
Glances can centralize available Glances servers using the ``--browser`` option. The server list can be staticaly defined in the Glances configuration file (section [serverlist]). Glances can also detect and display all Glances servers available on you network (auto discover mode is based on the the Zeroconf protocol only available on GNU/Linux and Mac OS X):
.. code-block:: console
client$ glances --browser
It is possible to disable the auto discover mode ``--disable-autodiscover``.
In server mode, you can set the bind address ``-B ADDRESS`` and listening
TCP port ``-p PORT``.
In client mode, you can set the TCP port of the server ``-p PORT``.
You can set a password to access to the server ``--password``.
Default binding address is ``0.0.0.0`` (Glances will listen on all the
available network interfaces) and TCP port is ``61209``.
In client/server mode, limits are set by the server side.
Glances is ``IPv6`` compatible. Just use the ``-B ::`` option to bind to
all IPv6 addresses.
As an experimental feature, if Glances server is not detected by the
client, the latter will try to grab stats using the ``SNMP`` protocol:
.. code-block:: console
client$ glances -c @snmpserver
Note: Stats grabbed by SNMP request are limited (operating system dependent).
Web Server Mode
---------------
If you want to remotely monitor a machine, called ``server``, from any
device with a web browser, just run the server with the ``-w`` option:
.. code-block:: console
server$ glances -w
and on the client enter the following URL in your favorite web browser:
::
http://@server:61208
where ``@server`` is the IP address or hostname of the server.
To change the refresh rate of the page, just add the period in seconds between refreshes at the end of the URL, ie. to refresh every 10s, use ``http://@server:61208/10``.
The Glances web interface follows responsive web design principles.
Screenshot from Chrome on Android
.. image:: images/screenshot-web2.png
Command Reference
=================
Command-Line Options
--------------------
-h, --help show this help message and exit
-V, --version show program's version number and exit
-d, --debug Enable debug mode
-C CONF_FILE, --config CONF_FILE
path to the configuration file
--enable-history enable the history mode
--disable-bold disable bold mode in the terminal
--disable-diskio disable disk I/O module
--disable-fs disable filesystem module
--disable-network disable network module
--disable-sensors disable sensors module
--disable-hddtemp disable HDDTemp module
--disable-left-sidebar
disable left sidebar
--disable-process disable process module
--disable-log disable log module
--enable-process-extended
enable extended stats on top process
--disable-quicklook disable the Quicklook module
--path-history PATH_HISTORY
Set the export path for graph history
--export-csv CSV_FILE
export stats to a CSV file
--export-influxdb
export stats to an InfluxDB server
--export-statsd
export stats to a Statsd server
--export-rabbitmq
export stats to a RabbitMQ server
-c CLIENT, --client CLIENT
connect to a Glances server by IPv4/IPv6 address or
hostname
-s, --server run Glances in server mode
--browser run the Glances client browser (list of Glances server)
--disable-autodiscover
disable autodiscover feature
-p PORT, --port PORT define the client/server TCP port [default: 61209]
-B BIND_ADDRESS, --bind BIND_ADDRESS
bind server to the given IPv4/IPv6 address or hostname
--password-badidea PASSWORD_ARG
define password from the command line
--password define a client/server password from the prompt or
file
--disable-autodiscover
Hide Glances server from the auto discover feature
--snmp-community SNMP_COMMUNITY
SNMP community
--snmp-port SNMP_PORT
SNMP port
--snmp-version SNMP_VERSION
SNMP version (1, 2c or 3)
--snmp-user SNMP_USER
SNMP username (only for SNMPv3)
--snmp-auth SNMP_AUTH
SNMP authentication key (only for SNMPv3)
--snmp-force force SNMP mode
-t TIME, --time TIME set refresh time in seconds [default: 3 sec]
-w, --webserver run Glances in web server mode
-q, --quiet run Glances in quiet mode (nothing is displayed)
-f PROCESS_FILTER, --process-filter PROCESS_FILTER
set the process filter patern (regular expression)
--process-short-name force short name for processes name
--hide-kernel-threads
hide kernel threads in process list
--tree display processes as a tree
-b, --byte display network rate in byte per second
-1, --percpu start Glances in per CPU mode
--fs-free-space display FS free space instead of used
--theme-white optimize display colors for white background
Interactive Commands
--------------------
The following commands (key pressed) are supported while in Glances:
``ENTER``
Set the process filter
Filter is a regular expression pattern:
- gnome: all processes starting with the gnome string
- .*gnome.*: all processes containing the gnome string
``a``
Sort process list automatically
- If CPU iowait ``>60%``, sort processes by I/O read and write
- If CPU ``>70%``, sort processes by CPU usage
- If MEM ``>70%``, sort processes by memory usage
``b``
Switch between bit/s or Byte/s for network I/O
``c``
Sort processes by CPU usage
``d``
Show/hide disk I/O stats
``e``
Enable/disable top extended stats
``f``
Show/hide file system stats
``F``
Switch between FS used and free space
``g``
Generate graphs for current history
``h``
Show/hide the help screen
``i``
Sort processes by I/O rate
``l``
Show/hide log messages
``m``
Sort processes by MEM usage
``n``
Show/hide network stats
``p``
Sort processes by name
``q`` or ``ESC``
Quit the current Glances session
``r``
Reset history
``s``
Show/hide sensors stats
``t``
Sort process by CPU times (TIME+)
``T``
View network I/O as combination
``u``
View cumulative network I/O
``w``
Delete finished warning log messages
``x``
Delete finished warning and critical log messages
``z``
Show/hide processes stats
``1``
Switch between global CPU and per-CPU stats
``2``
Enable/disable left sidebar
``3``
Enable/disable the Quicklook module
``/``
Switch between short name / command line (processes name)
In the Glances client browser (accessible through the --browser command line argument):
``ENTER``
Run Glances client to the selected server
``UP``
Up in the servers list
``DOWN``
Down in the servers list
``q`` or ``ESC``
Quit Glances
Configuration
=============
No configuration file is mandatory to use Glances.
Furthermore a configuration file is needed to set up limits, disks or
network interfaces to hide and/or monitored processes list or to define
alias.
By default, the configuration file is under:
:Linux: ``/etc/glances/glances.conf``
:\*BSD and OS X: ``/usr/local/etc/glances/glances.conf``
:Windows: ``%APPDATA%\glances\glances.conf``
On Windows XP, the ``%APPDATA%`` path is:
::
C:\Documents and Settings\<User>\Application Data
Since Windows Vista and newer versions:
::
C:\Users\<User>\AppData\Roaming
or
%userprofile%\AppData\Roaming
You can override the default configuration, located in one of the above
directories on your system, except for Windows.
Just copy the ``glances.conf`` file to your ``$XDG_CONFIG_HOME`` directory,
e.g., on Linux:
.. code-block:: console
mkdir -p $XDG_CONFIG_HOME/glances
cp /usr/share/doc/glances/glances.conf $XDG_CONFIG_HOME/glances/
On OS X, you should copy the configuration file to
``~/Library/Application Support/glances/``.
*Configuration file description*
Each plugin and export module can have a section.
Example for the CPU plugin:
.. code-block::
[cpu]
user_careful=50
user_warning=70
user_critical=90
iowait_careful=50
iowait_warning=70
iowait_critical=90
system_careful=50
system_warning=70
system_critical=90
steal_careful=50
steal_warning=70
steal_critical=90
By default Steal CPU time alerts aren't logged. If you want to enable log/alert, just add:
.. code-block::
steal_log=True
Logs and debug mode
===================
Glances logs all its internal messages to a log file. By default, only
INFO & WARNING & ERROR &CRITICAL levels are logged, but DEBUG messages
can ben logged using the -d option on the command line.
By default, the log file is under:
:Linux, \*BSD and OS X: ``/tmp/glances.log``
:Windows: ``%APPDATA%\Local\temp\glances.log``
If glances.log is not writable, a new file will be created and returned to the user console.
Anatomy Of The Application
==========================
Legend
------
| ``GREEN`` stat counter is ``"OK"``
| ``BLUE`` stat counter is ``"CAREFUL"``
| ``MAGENTA`` stat counter is ``"WARNING"``
| ``RED`` stat counter is ``"CRITICAL"``
*Note*: only stats with colored background will be logged in the alert
view.
Header
------
.. image:: images/header.png
The header shows the hostname, OS name, release version, platform
architecture and system uptime (on the upper right corner).
Additionally, on GNU/Linux, it also shows the kernel version.
In client mode, the server connection status is displayed.
Connected:
.. image:: images/connected.png
Disconnected:
.. image:: images/disconnected.png
QuickLook
---------
The quicklook plugin is only display on wide screen and propose a bar view for CPU and memory (virtual and swap).
.. image:: images/quicklook.png
*Note*: limit values can be overwritten in the configuration file under
the ``[quicklook]`` section.
CPU
---
Short view:
.. image:: images/cpu.png
If enough horizontal space is available, extended CPU information are
displayed.
Extended view:
.. image:: images/cpu-wide.png
To switch to per-CPU stats, just hit the ``1`` key:
.. image:: images/per-cpu.png
The CPU stats are shown as a percentage and for the configured refresh
time. The total CPU usage is displayed on the first line.
| If user|system CPU is ``<50%``, then status is set to ``"OK"``
| If user|system CPU is ``>50%``, then status is set to ``"CAREFUL"``
| If user|system CPU is ``>70%``, then status is set to ``"WARNING"``
| If user|system CPU is ``>90%``, then status is set to ``"CRITICAL"``
*Note*: limit values can be overwritten in the configuration file under
the ``[cpu]`` and/or ``[percpu]`` sections.
Load
----
.. image:: images/load.png
On the *No Sheep* blog, *Zachary Tirrell* defines the load average [1]_:
"In short it is the average sum of the number of processes
waiting in the run-queue plus the number currently executing
over 1, 5, and 15 minutes time periods."
Glances gets the number of CPU core to adapt the alerts.
Alerts on load average are only set on 15 minutes time period.
The first line also displays the number of CPU core.
| If load average is ``<0.7*core``, then status is set to ``"OK"``
| If load average is ``>0.7*core``, then status is set to ``"CAREFUL"``
| If load average is ``>1*core``, then status is set to ``"WARNING"``
| If load average is ``>5*core``, then status is set to ``"CRITICAL"``
*Note*: limit values can be overwritten in the configuration file under
the ``[load]`` section.
Memory
------
Glances uses two columns: one for the ``RAM`` and one for the ``SWAP``.
.. image:: images/mem.png
If enough space is available, Glances displays extended information for
the ``RAM``:
.. image:: images/mem-wide.png
Alerts are only set for used memory and used swap.
| If used memory|swap is ``<50%``, then status is set to ``"OK"``
| If used memory|swap is ``>50%``, then status is set to ``"CAREFUL"``
| If used memory|swap is ``>70%``, then status is set to ``"WARNING"``
| If used memory|swap is ``>90%``, then status is set to ``"CRITICAL"``
*Note*: limit values can be overwritten in the configuration file under
the ``[memory]`` and/or ``[memswap]`` sections.
Network
-------
..<
|