Class: ProcessWanker::Application

Inherits:
Object
  • Object
show all
Includes:
Log
Defined in:
lib/pw_app.rb

Overview

the main ProcessWanker application

Constant Summary collapse

DEFAULT_WAIT = 
60
@@display_mutex = 
Mutex.new()

Constants included from Log

Log::DEBUG, Log::ERROR, Log::INFO, Log::WARN

Instance Method Summary collapse

Methods included from Log

debug, error, info, log, set_level, warn

Constructor Details

#initialize ⇒ Application

Returns a new instance of Application.



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# File 'lib/pw_app.rb', line 60

def initialize()
 
#
# parse options
#
		
parse_opts()
		
#
# generate certs/keys?
#
		
if(@options[:generate_ca])
	generate_ca()
	exit
end

if(@options[:generate_user])
	generate_user()
	exit
end

Config::set_config_path(@options[:config]) if(@options[:config])

#
# run as daemon?
#

if(@options[:daemon])
	start_daemon()
	exit
end

#
# list known clusters/hosts?
#

cp=Config::get_config_path
raise "no such config file: #{cp}" if(!File.exist?(cp))
@config=Config::load_config(cp)  # .new( :client, File.read(cp) )
raise "no client config provided" if(!@config.client)
if(@options[:list_clusters])
	list_clusters()
	exit
end

#
# ok... it's a remote command 
#

execute_remote()

end

Instance Method Details

#display_response(resp, host) ⇒ Object 



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# File 'lib/pw_app.rb', line 490

def display_response(resp,host)

	@@display_mutex.synchronize do
		
     if(resp[:services])
			puts
			printf("[%s]",host.name)
			if(host.tags.length>0)
				puts " - (#{host.tags.join(",")})" 
			else
				puts
			end
			printf("    %-30s %-30s %-20s %s\n","name","state","want-state","tags")
			groups=resp[:services].values.map { |x| x[:group_name] }.uniq.sort
			groups.each do |grp|
				puts "  [group: #{grp}]" if(groups.length > 1)
				services=resp[:services].values.select { |x| x[:group_name] == grp }
				services.sort! { |a,b| a[:name] <=> b[:name] }
				services.each do |s|
					show=s[:show_state]
					show << " (suppressed)" if(s[:suppress])
					printf("    %-30s %-30s %-20s %s\n",
						s[:name],
						show,
						s[:want_state],
						s[:tags].join(" ")
					)
				end
			end			
			
			puts
		end
	
		if(resp[:counts])
				resp[:counts].keys.sort.each do |name|
					printf("%-50s %d\n",name,resp[:counts][name])
				end
		end
		
	end
	
end

#execute_host_action(host, action) ⇒ Object 



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# File 'lib/pw_app.rb', line 461

def execute_host_action(host,action)
	begin
		client=NetClient.new(host)
		req=action.merge(
			{
				:wait				=> @options[:wait],
				:sequential	=> @options[:sequential]
			})
		client.send_msg(req)
		resp=client.wait
	rescue Exception => e
		puts("[#{host.name}]: connection failure")
		debug(e.message)
		e.backtrace { |x| debug(x) }
	end

	if(resp)
		display_response(resp,host)			
	end
end

#execute_remote ⇒ Object 



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# File 'lib/pw_app.rb', line 411

def execute_remote()
	
	#
	# match hosts
	#
	
	hosts=match_hosts(@options[:host],@options[:cluster])
	
	#
	# set defaults
	#
	
	if(@options[:actions].length == 0)
		@options[:actions] << { :cmd => :list, :spec => "all" }
	end
	@options[:wait] ||= DEFAULT_WAIT

	#
	# execute each action sequentially
	#
	
	@options[:actions].each do |action|
	
		#
		# hit each host in turn, or concurrently
		#			
	
		if(@options[:sequential])
			hosts.each do |host|
				execute_host_action(host,action)
			end
		else
			threads=[]
			hosts.each do |host|
				threads << Thread.new do 
					execute_host_action(host,action)
				end
			end
			threads.each { |t| t.join }
		end
	end
	
end

#generate_ca ⇒ Object 



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# File 'lib/pw_app.rb', line 258

def generate_ca()
	raise "no --output-prefix specified" if(!@options[:output_prefix])
	pass=nil
	if(@options[:require_passphrase])
		pass=HighLine.new.ask("Password (for encrypting output key) : ") { |x| x.echo=false }.strip
		p2=HighLine.new.ask("(verify)                             : ") { |x| x.echo=false }.strip
		raise "passwords don't match" if(pass != p2)
	end
	
	ProcessWanker::NetUtil::generate_ca(@options[:output_prefix],pass)
end

#generate_user ⇒ Object 



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# File 'lib/pw_app.rb', line 276

def generate_user()
	raise "no --output-prefix specified" if(!@options[:output_prefix])
	raise "no --ca-prefix specified" if(!@options[:ca_prefix])
	pass=nil
	if(@options[:require_passphrase])
		pass=HighLine.new.ask("Password (for encrypting output key) : ") { |x| x.echo=false }.strip
		p2=HighLine.new.ask("(verify)                             : ") { |x| x.echo=false }.strip
		raise "passwords don't match" if(pass != p2)
	end
	
	ProcessWanker::NetUtil::generate_cert(
		@options[:ca_prefix],
		@options[:output_prefix],
		@options[:generate_user],
		pass)
		
end

#list_clusters ⇒ Object 



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# File 'lib/pw_app.rb', line 386

def list_clusters()
	
	# ensure that at least default cluster exists
	@config.client.get_cluster("default")
	
	puts "clusters:"
	@config.client.clusters.clusters.each do |cname,cluster|
		puts " [#{cname}]"
		c=cluster
		c.hosts.each do |hname,h|
			printf("    %-30s",hname)
			printf("    %-30s","#{h.hostname}:#{h.port}")
			h.tags.each { |t| printf("%s ",t) }
			puts
		end
	end
	exit
end

#match_hosts(hostspec, cluster_name) ⇒ Object 



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# File 'lib/pw_app.rb', line 370

def match_hosts(hostspec,cluster_name)
	cluster_name ||= "default"
	cluster=@config.client.get_cluster(cluster_name)
	raise "no such cluster: #{cluster_name}" if(!cluster)

	hosts=[]
	cluster.hosts.each { |k,v| hosts << v if(!hostspec || v.matches_spec(hostspec)) }
	hosts
end

#parse_opts ⇒ Object 



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# File 'lib/pw_app.rb', line 120

def parse_opts()

	options={}
	options[:actions]=[]

	optparse=OptionParser.new do |opts|
	
		opts.on(nil,'--help','Display this screen') do
			puts
			puts opts
			puts
			puts "  SERVICE_SPEC can be a 'all', a name, a regular expression, or a tag - eg. tag:db"
			puts "  It can also be a comma-separated list of all of the above. Prefixing a string/regex/tag with"
			puts "  a tilde (~) has the meaning 'except'."
			puts
			exit
		end
	
		opts.on("-l","--list [SERVICE_SPEC]","Show the status of the given service(s)") do |v|
			options[:actions] << { :cmd => :list, :spec => v || "all" }
		end

		opts.on("-s","--start SERVICE_SPEC","Start the given service(s)") do |v|
			options[:actions] << { :cmd => :start, :spec => v || "all" }
		end

		opts.on("-k","--kill SERVICE_SPEC","Stop the given service(s)") do |v|
			options[:actions] << { :cmd => :stop, :spec => v || "all" }
		end
	
		opts.on("-i","--ignore SERVICE_SPEC","Ignore the given service(s)") do |v|
			options[:actions] << { :cmd => :ignore, :spec => v || "all" }
		end
	
		opts.on("--stop SERVICE_SPEC","Stop the given service(s)") do |v|
			options[:actions] << { :cmd => :stop, :spec => v || "all" }
		end
	
		opts.on("-r","--restart SERVICE_SPEC","Restart the given service(s)") do |v|
			options[:actions] << { :cmd => :restart, :spec => v || "all" }
		end

		opts.on("-w","--wait SECS",Integer,"Wait SECS seconds for service(s) to reach requested state, default (#{DEFAULT_WAIT})") do |v|
			options[:wait] = v
		end

		opts.on("--sequential [DELAY_SECS]",Float,"Execute all operations sequentially, with optional delay between them") do |v|
			options[:sequential]=v || 0.0
		end

		opts.on("--reload","Reload configuration") do
			options[:actions] << { :cmd => :reload }
		end
	
		opts.on("--terminate","Terminate daemon") do
			options[:actions] << { :cmd => :terminate }
		end
	
		opts.on("-c","--cluster NAME","Select a cluster to control") do |v|
			options[:cluster]=v
		end
	
		opts.on("-h","--host HOST","Select a single host to control") do |v|
			options[:host]=v
		end

		opts.on("-g","--config FILE","Specify configuration file to use (#{Config::get_config_path})") do |v|
			options[:config]=v
		end
	
		opts.on("--list-clusters","Display a list of known clusters and hosts") do
			options[:list_clusters]=true
		end
	
		opts.on("-d","--daemon","Run in the background as a server") do
			options[:daemon]=true
		end
	
		opts.on("-f","--foreground","Don't detach - stay in the foreground (useful only with -d option)") do
			options[:foreground]=true
		end
	
		opts.on("--notboot","Don't start all local services automatically (useful only with the -d option)") do
			options[:notboot]=true
		end
	
		opts.on("--generate-ca","Generate CA cert/key (requires --output-prefix)") do |v|
			options[:generate_ca]=v
		end
	
		opts.on("--output-prefix PATH","Specify output file prefix for .crt and .key") do |v|
			options[:output_prefix]=v
		end
	
		opts.on("--ca-prefix PATH","Specify input file location prefix for the CA certificate and key") do |v|
			options[:ca_prefix]=v
		end
	
		opts.on("--require-passphrase","Use a passphrase to encrypt any generated private keys") do
			options[:require_passphrase]=true
		end
	
		opts.on("--generate-user NAME","Generate client cert/key - requires (--ca-prefix and --output-prefix)") do |v|
			options[:generate_user]=v
		end
	
		opts.on("--debug","Debug hook") do |v|
			options[:actions] << { :cmd => :debug }
		end
	
		opts.on("--log FILE","Log file (for pw output only)") do |v|
			options[:log_file] = v
      end
      
		opts.on("--verbose","Debugging enabled") do |v|
			Log::set_level(Log::DEBUG)
		end
	
	
	end

	extra=optparse.parse!

	if(extra.length > 0)
		puts "warning: ignoring extra params: #{extra.join(" ")}"
	end

	@options=options
		
	
end

#start_daemon ⇒ Object 



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# File 'lib/pw_app.rb', line 300

def start_daemon
	
	info("starting daemon")			

	# create servicemgr
	ServiceMgr.new()

	# load daemon config
    puts Config::get_config_path()
#			@config=Config.new( :daemon, File.read( Config::get_config_path ) )
	@config=Config::load_config( Config::get_config_path )  # .new( :client, File.read(cp) )
	raise "no daemon config provided" if(!@config.daemon)

	# apply config
	ServiceMgr::instance().apply_config(@config,@options[:notboot])

	# daemonize?			
	if(!@options[:foreground])

      puts "Going to background..."
      
      Process.fork do
        
  			# start net server
  			NetServer.new(@config)


				# redirect inputs/outputs
				file=@options[:log_file] || @config.daemon.log_file || "/var/log/pw.log"
        puts "logging to #{file}"
        begin
          FileUtils.mkdir_p( File.dirname(file) )
          File.open(file,"a") { |x| x.puts "ProcessWanker starts" }
          STDERR.reopen(file,"a")
          STDOUT.reopen(file,"a")
  				STDIN.reopen("/dev/null")
        rescue Exception => e
          raise "unable to open log file #{file}"
        end
        
  			Log::set_level(Log::DEBUG)
        
        # start new session
        Process.setsid()
        
  			# run
  			ServiceMgr::instance().run()
        
      end
      
    else
      
			# start net server
			NetServer.new(@config)


      # just run in foreground
      ServiceMgr::instance().run()
      
    end
	

end