Lark
Lark is a simple system to store local cache in a cluster of redis servers, be able to query state about other lark nodes, and notice when one goes offline.
Lark.on_expired do |id|
Log.debug "Lost node #{id}"
end
Lark.configure :domain => "staging", :expire => 60
EM.run do
lark = Lark::Base.new "bottom_node.1", "group3", "ip" => "127.0.0.1", "role" => "worker node"
EM::PeriodicTimer.new(5) do
lark.set "load" => get_load, "mem_usage" => get_mem_usage
end
on_some_event do
Lark.get(:group3).each do |n|
check_on_node(n)
end
end
end