Net::SSH::Multi is a library for controlling multiple Net::SSH connections via a single interface. It exposes an API similar to that of Net::SSH::Connection::Session and Net::SSH::Connection::Channel, making it simpler to adapt programs designed for single connections to be used with multiple connections.
This library is particularly useful for automating repetitive tasks that must be performed on multiple machines. It executes the commands in parallel, and allows commands to be executed on subsets of servers (defined by groups).
Easily manage multiple connections
Open channels, spawn processes, etc. on multiple connections in parallel
Transparently limit concurrent connections when dealing with large numbers of servers (Net::SSH::Multi::Session#concurrent_connections)
Specify a default gateway machine through which connections should be tunneled, or even specify a different gateway machine for each server
In a nutshell:
require 'net/ssh/multi' Net::SSH::Multi.start do |session| # access servers via a gateway session.via 'gateway', 'gateway-user' # define the servers we want to use session.use 'user1@host1' session.use 'user2@host2' # define servers in groups for more granular access session.group :app do session.use 'user@app1' session.use 'user@app2' end # execute commands on all servers session.exec "uptime" # execute commands on a subset of servers session.with(:app).exec "hostname" # run the aggregated event loop session.loop end
See Net::SSH::Multi::Session for more documentation.
net-ssh (version 2)
If you want to run the tests or use any of the Rake tasks, you'll need:
Echoe (for the Rakefile)
Mocha (for the tests)
gem install net-ssh-multi (might need sudo privileges)
(The MIT License)
Copyright © 2008 Jamis Buck <email@example.com>
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