Desi

Desi (Developper Elasticsearch Installer) is very simple tool to quickly set up an Elastic Search local install for development purposes.

It can:

• download and install Elasticsearch (the latest release by default)
• start/stop/restart it.
• do basic indices management (list, delete, empty a given set of indices)

It can be used both as a command-line tool and as a library.

Usage (command-line)

$ desi list                  # List locally installed Elasticsearch releases
$ desi releases              # List all upstream Elastic Search releases (latest 5 by default)
$ desi install [VERSION]     # Install a specific version (latest by default)
$ desi start                 # Start a local 1-node cluster (noop if active)
$ desi restart               # (Re)start cluster (even if active)
$ desi stop                  # Stop cluster
$ desi status [--host HOST]  # Show running cluster info
$ desi tail                  # Show tail output from Elastic Search's log file
$ desi current               # Show current version
$ desi current VERSION       # Change the symlink pointing to current version

$ desi indices "^foo"          # List all indices whose name match /^foo/
$ desi indices "^foo" --delete # Delete all matching indices
$ desi indices "^foo" --close  # Close all matching indices
$ desi indices "bar$" --empty  # Remove all records from the matching indices

Examples (command-line and Ruby)

Installing Elastic Search

$ # The latest version will be installed by default
$ desi install
* No release specified, will fetch latest.
* fetching release elasticsearch-1.0.1.tar.gz
[…]

$ # You can also give a specific release name
$ desi install 0.90.12 # ("v0.90.12" or "elasticsearch-0.90.12" would also work)
* fetching release elasticsearch-0.90.12.tar.gz
[…]

Get the list of locally installed releases

The current version is the one symlinked to $HOME/elasticsearch/current, that will be spun up by (desi start)

• command-line

$ desi list
Local ES installs in /home/me/elasticsearch (current one is tagged with '*'):
  * elasticsearch-1.0.1 (/home/me/elasticsearch/elasticsearch-1.0.1)
  - elasticsearch-1.0.0 (/home/me/elasticsearch/elasticsearch-1.0.0)

• library

Desi::LocalInstall.new.releases.map(&:name) #=> ["elasticsearch-1.0.0", "elasticsearch-1.0.1"]
Desi::LocalInstall.new.releases.detect(&:current?).version #=> "1.0.1"

Start a node instance and get the cluster's status

• command-line

$ desi start
 * Elastic Search 1.0.1 started
$ desi status
OK. Elastic Search cluster 'elasticsearch' (v1.0.1) is running on 1 node(s) with status yellow

# Start Elastic Search in the foreground
$ desi start -f # or --foreground
ES will be launched in the foreground
^C # Manual stop with Control-C
Elastic Search interrupted!

• library

Desi::ProcessManager.new.start.status #=> "OK. Elastic Search cluster 'elasticsearch' (v1.0.1) is running on 1 node(s) with status green"

List and delete some indices

• command-line

$ # List all local indices
$ desi indices
  Indices from host http://127.0.0.1:9200 matching the pattern /.*/

  foo
  bar
  baz

$ # List all indices with "foo" in their name on remote cluster 129.168.1.42, port 9800
$ desi indices --host 129.168.1.42:9800 foo
  Indices from host http://192.168.1.42:9800 matching the pattern /foo/

  remotefoo1
  remotefoo2

$ # Remove all indices whose name starts with "ba"
$ desi indices --delete "^ba"
The following indices from host http://127.0.0.1:9200 are now deleted
 * bar
 * baz

• library

# All local indices
Desi::IndexManager.new.list #=> ["foo", "bar", "baz"]

# All local indices whose name starts with "b"
Desi::IndexManager.new.list("^b") #=> ["bar", "baz"]

# All indices from distant cluster
Desi::IndexManager.new(host: "192.168.1.42:9800").list #=> ["remotefoo1", "remotefoo2"]

# Delete all local indices whose name starts with "ba"
Desi::IndexManager.new.delete!("^ba") #=> nil

# The indices actually disappeared! \o/
Desi::IndexManager.new.list #=> ["foo"]

Change setting(s)

There are two settings at the moment: location of the installation directory (directory, default: ~/elasticsearch) and ES host address (server, default: localhost:9200).

Desi will look for files /etc/desi.yml or ~/.desi.yml (the options found in the former will be overriden by the ones found in the latter).

• command-line

  echo -e "---\n directory: ~/foobar" > ~/.desi.yml for instance

• library

Desi.configure do |c|
  c.directory = "~/local/foo"
  c.server = "192.168.1.42:9200"
end

Installation

Add this line to your application's Gemfile:

gem 'desi'

And then execute:

$ bundle

Or install it yourself as:

$ gem install desi

TODO

• add more tests

• plugin management ? (list, install, remove ES plugins)

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request