A Graphite dashboard viewable without ever leaving the command line. Configuration and concept very similar to Tasseo.

Install via Rubygems:

gem install casseo

Or if you're really concerned about Rubygems' speed, clone the reposistory and create a standalone version (Ruby 1.9 satisfies all of Casseo's dependencies):

git clone https://github.com/brandur/casseo.git
cd casseo
rake standalone
mv casseo ~/bin/

Casseo expects to be able to find your Graphite credentials at ~/.casseorc:

echo '{ graphite_auth: "graphite:my_secret_api_key", graphite_url: "https://graphite.example.com:8080" }' > ~/.casseorc
chmod 600 ~/.casseorc

Other allowed configuration options are:

• compressed_chart: whether to include a space between chart symbols (default: false); see also c shortcut
• dashboard_default: name of the dashboard to load if none is specified (default: home)
• decimal_precision: floating point precision to show (default: 1); see also p shortcut
• interval: Graphite update interval in seconds (default: 2)
• period_default: default period of data to show (default: 5 minutes)

Dashboards are configured via simple Ruby in a manner reminiscent of Tasseo. All *.rb files in ~/.casseo/dashboards or in any of its subdirectories are loaded automatically. Dashboards are assigned names so that they can be referenced and opened like so:

casseo home

An example dashboard (save to ~/.casseo/dashboards/home.rb):

Casseo::Dashboard.define(:api) do |d|
  d.metric "custom.api.production.requests.per-sec", display: "req/sec"
  d.blank
  d.metric "custom.api.production.requests.500.per-min", display: "req 500/min"
  d.metric "custom.api.production.requests.502.per-min", display: "req 502/min"
  d.metric "custom.api.production.requests.503.per-min", display: "req 503/min"
  d.metric "custom.api.production.requests.504.per-min", display: "req 504/min"
  d.blank
  d.metric "custom.api.production.requests.user-errors.per-min", display: "req user err/min"
  d.blank
  d.metric "custom.api.production.requests.latency.avg", display: "req latency"
end

Get a list of all known dashboards:

casseo --list

Casseo also takes a file as its first parameter:

casseo ~/.casseo/dashboards/home.rb

For now, there are no options on key bindings. Here's what you get:

• c toggle compressed chart
• j page down
• k page up
• m toggle max value column
• p show more floating point precision
• q quit
• 1 5 minute range
• 2 60 minute range
• 3 3 hour range
• 4 24 hour range
• 5 7 day range