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https://github.com/nicolargo/glances.git
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221 lines
6.1 KiB
Markdown
221 lines
6.1 KiB
Markdown
Glances -- Eye on your system
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=============================
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## Description
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Glances is a CLI curses based monitoring tool for GNU/Linux or BSD OS.
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Glances uses the libstatgrab library to get information from your system.
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It is developed in Python and uses the python-statgrab lib.
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## Installation
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### From package manager
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Packages exist for Arch, Fedora, Redhat ...
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### From source
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Get the latest version:
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$ wget https://github.com/downloads/nicolargo/glances/glances-1.3.5.tar.gz
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Glances use a standard GNU style installer:
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$ tar zxvf glances-1.3.5.tar.gz
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$ cd glances-1.3.5
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$ ./configure
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$ make
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$ sudo make install
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Pre-requisites:
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* Python 2.6+ (not tested with Python 3+)
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* python-statgrab 0.5+ (did NOT work with python-statgrab 0.4)
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Notes: For Debian.
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The Debian Squeeze repos only include the python-statgrab 0.4.
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You had to install the version 0.5 using the following commands:
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$ sudo apt-get install libstatgrab-dev pkg-config python-dev make
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$ wget http://ftp.uk.i-scream.org/sites/ftp.i-scream.org/pub/i-scream/pystatgrab/pystatgrab-0.5.tar.gz
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$ tar zxvf pystatgrab-0.5.tar.gz
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$ cd pystatgrab-0.5/
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$ ./setup.py build
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$ sudo ./setup.py install
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Notes: For Ubuntu 10.04 and 10.10.
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The instruction to install the version 0.5 are here:
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https://github.com/nicolargo/glances/issues/5#issuecomment-3033194
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## Running
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Easy:
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$ glances.py
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## User guide
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By default, stats are refreshed every second, to change this setting, you can
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use the -t option. For exemple to set the refrech rate to 5 seconds:
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$ glances.py -t 5
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Importants stats are colored:
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* GREEN: stat counter is "OK"
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* BLUE: stat counter is "CAREFUL"
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* MAGENTA: stat counter is "WARNING"
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* RED: stat counter is "CRITICAL"
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When Glances is running, you can press:
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* 'h' to display an help message whith the keys you can press
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* 'a' to set the automatic mode. The processes are sorted automatically
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If CPU > 70%, sort by process "CPU consumption"
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If MEM > 70%, sort by process "memory size"
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* 'c' to sort the processes list by CPU consumption
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* 'd' Disable or enable the disk IO stats
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* 'f' Disable or enable the file system stats
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* 'm' to sort the processes list by process size
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* 'n' Disable or enable the network interfaces stats
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* 'q' Exit
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### Header
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The header shows the Glances version, the host name and the operating
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system name, version and architecture.
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### CPU
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The CPU states are shown as a percentage and for the configured refresh
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time.
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If user|kernel|nice CPU is < 50%, then status is set to "OK".
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If user|kernel|nice CPU is > 50%, then status is set to "CAREFUL".
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If user|kernel|nice CPU is > 70%, then status is set to "WARNING".
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If user|kernel|nice CPU is > 90%, then status is set to "CRITICAL".
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### Load
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On the Nosheep blog, Zach defines the average load: "In short it is the
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average sum of the number of processes waiting in the run-queue plus the
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number currently executing over 1, 5, and 15 minute time periods."
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Glances gets the number of CPU cores to adapt the alerts. With Glances,
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alerts on average load are only set on 5 and 15 mins.
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If average load is < O.7*Core, then status is set to "OK".
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If average load is > O.7*Core, then status is set to "CAREFUL".
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If average load is > 1*Core, then status is set to "WARNING".
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If average load is > 5*Core, then status is set to "CRITICAL".
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### Memory
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Glances uses tree columns: memory (RAM), swap and "real".
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Real used memory is: used - cache.
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Real free memory is: free + cache.
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With Glances, alerts are only set for on used swap and real memory.
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If memory is < 50%, then status is set to "OK".
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If memory is > 50%, then status is set to "CAREFUL".
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If memory is > 70%, then status is set to "WARNING".
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If memory is > 90%, then status is set to "CRITICAL".
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### Network bit rate
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Glances display the network interface bit rate. The unit is adapted
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dynamicaly (bits per second, Kbits per second, Mbits per second...).
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Alerts are set only if the network interface maximum speed is available.
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If bitrate is < 50%, then status is set to "OK".
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If bitrate is > 50%, then status is set to "CAREFUL".
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If bitrate is > 70%, then status is set to "WARNING".
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If bitrate is > 90%, then status is set to "CRITICAL".
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For exemple, on a 100 Mbps Ethernet interface, the warning status is set
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if the bit rate is higher than 70 Mbps.
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### Disk I/O
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Glances display the disk I/O throughput. The unit is adapted dynamicaly
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(bytes per second, Kbytes per second, Mbytes per second...).
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There is no alert on this information.
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### Filesystem
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Glances display the total and used filesytem disk space. The unit is
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adapted dynamicaly (bytes per second, Kbytes per second, Mbytes per
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second...).
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Alerts are set for used disk space:
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If disk used is < 50%, then status is set to "OK".
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If disk used is > 50%, then status is set to "CAREFUL".
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If disk used is > 70%, then status is set to "WARNING".
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If disk used is > 90%, then status is set to "CRITICAL".
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### Processes
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Glances displays a summary and a list of processes.
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By default (or if you hit the 'a' key) the process list is automaticaly
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sorted by CPU of memory consumption.
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The number of processes in the list is adapted to the screen size.
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### Footer
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Glances displays a caption and the current time/date.
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## Todo
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You are welcome to contribute to this software.
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* Packaging for Debian, Ubuntu, BSD...
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* Check the needed Python library in the configure.ac
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* Add file system stats when the python-statgrab is corrected
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