Class: ZkExec::Runner

Inherits:
Object
  • Object
show all
Includes:
ZkExec
Defined in:
lib/zkexec/runner.rb

Constant Summary

Constants included from ZkExec

VERSION

Instance Method Summary collapse

Methods included from ZkExec

#log, #silence!

Constructor Details

#initialize ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/zkexec/runner.rb', line 7

def initialize
end

Instance Method Details

#run(args) ⇒ Object 



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# File 'lib/zkexec/runner.rb', line 10

def run(args)
  options = { :mirrors => [], :cluster => "localhost:2181", :health_interval => 30, :health_delay => 30 }
  opts = OptionParser.new do |opts|
    opts.banner = "Usage: zkexec [options]\n\nRun a command, and restart if the config files change on the remote zookeeper.\n\n"

    opts.on("-e", "--exec COMMAND", "Run this command") do |s|
      options[:exec] = s
    end
    
    opts.on("-c", "--cluster HOST:PORT,...", "Comma-delimited list of zookeeper hosts") do |s|
      options[:cluster] = s
    end
    
    opts.on("-H", "--health COMMAND", "Run this command to health-check") do |s|
      options[:health] = s
    end
    
    opts.on("-i", "--health-interval INTERVAL", "Health-check every INTERVAL seconds") do |s|
      options[:health_interval] = s.to_f
    end
    
    opts.on("-d", "--health-delay INTERVAL", "Wait before starting health checks") do |s|
      options[:health_delay] = s.to_f
    end
    
    opts.on("-m", "--mirror LOCAL_PATH=ZK_PATH", "Mirror a config file from zookeeper to localhost") do |s|
      options[:mirrors] << s.split("=")
    end
    
    opts.on("-l", "--lock NAME", "Name of a zk lockfile, used to enforce rolling restarts") do |s|
      options[:lock] = s
    end
            
    opts.on("-a", "--alert COMMAND", "Run this command if the primary command returns","falsey or health checks fail for too long") do |s|
      options[:alert] = s
    end
    
    opts.on("-v", "--verbose") do
      options[:verbose] = true
    end

    opts.on("-s", "--silent") do 
      options[:silent] = true
    end
    
    opts.on_tail("-h", "--help", "Show this message") do
      puts opts
      exit
    end
  end
  
  opts.parse!
  
  unless options[:exec]
    puts "Missing required option --exec.  See --help for usage."
    exit 1
  end
  
  silence! if options[:silent]
  
  begin
    Executor.new(options).execute
  rescue => e
    if options[:verbose]
      raise
    else
      log(e.message)
      exit 1
    end
  end
end