Visage is a web interface for viewing collectd statistics.
It also provides a JSON interface onto
collectd's RRD data,
giving you an easy way to mash up the data.
- renders graphs in the browser, and retrieves data asynchronously
- interactive graph keys, to highlight lines and toggle line visibility
- drop-down or mouse selection of timeframes (also rendered asynchronously)
- JSON interface onto
Here, have a graph:
Or check out a live demo.
N.B: Visage must be deployed on a machine where
collectd stores its stats in RRD.
On Ubuntu, to install dependencies run:
$ sudo apt-get install -y build-essential librrd-ruby ruby ruby-dev rubygems collectd
On CentOS, to install dependencies run:
$ sudo yum install -y ruby-RRDtool ruby rubygems collectd
Then install the app with:
$ gem install visage-app
You can try out Visage quickly with:
$ visage-app start
Then paste the URL from the output into your browser.
If you get a
command not found when running the above command (RubyGems likely
isn't on your PATH), try this instead:
$ $(dirname $(dirname $(gem which visage-app)))/bin/visage-app start
Visage can be deployed on Apache with Passenger:
$ sudo apt-get install libapache2-mod-passenger
Visage can attempt to generate an Apache vhost config for use with Passenger:
$ visage-app genapache <VirtualHost *> ServerName ubuntu.localdomain ServerAdmin email@example.com DocumentRoot /home/user/.gem/ruby/1.8/gems/visage-app-0.1.0/lib/visage-app/public <Directory "/home/user/.gem/ruby/1.8/gems/visage-app-0.1.0/lib/visage-app/public"> Options FollowSymLinks Indexes AllowOverride None Order allow,deny Allow from all </Directory> </VirtualHost>
Copypasta this into your system's Apache config structure and tune to taste.
To do this on Debian/Ubuntu:
$ sudo -s $ visage-app genapache > /etc/apache2/sites-enabled/visage $ a2dissite default $ service apache2 reload
Then head to your Apache instance and Visage will be up and running.
Visage looks for two environment variables when starting up:
CONFIG_PATH, an entry on the configuration file search path
RRDDIR, the location of collectd's RRDs
Visage has a configuration search path which can be used for overriding
individual files. By default it has one entry:
You can set the
CONFIG_PATH environment variable to add another directory to
the config load path. This directory will be searched when loading up
This is especially useful when you want to deploy + run Visage from an installed gem with Passenger. e.g.
<VirtualHost *:80> ServerName monitoring.example.org ServerAdmin firstname.lastname@example.org SetEnv CONFIG_PATH /var/lib/visage SetEnv RRDDIR /opt/collectd/var/lib/collectd DocumentRoot /var/lib/gems/1.8/gems/visage-app-0.3.0/lib/visage/public <Directory /> Options FollowSymLinks AllowOverride None </Directory> LogFormat "%h %l %u %t \"%r\" %>s %b" common CustomLog /var/log/apache2/access.log common </VirtualHost>
Also to keep in mind when deploying with Passenger, the
and its files need to have the correct ownership:
chown nobody:nogroup -R /var/lib/visage
Developing + testing
Check out the code with:
$ git clone git://github.com/auxesis/visage.git
Install the development dependencies with:
$ gem install bundler $ bundle install
Run all cucumber features:
$ rake cucumber
And run the app with:
$ shotgun lib/visage-app/config.ru
To create and install a new gem from the current source tree:
$ rake install
Visage is MIT licensed.
Visage is distributed with Highcharts. Torstein Hønsi has kindly granted permission to distribute Highcharts under the GPLv2 as part of Visage.