Class: NERA::RemoteConnector

Inherits:
Object
  • Object
show all
Defined in:
lib/nera/nera_remote_connector.rb

Overview

A class for remote connection

Instance Method Summary collapse

Constructor Details

#initialize(path_db_folder) ⇒ RemoteConnector

Returns a new instance of RemoteConnector.

Raises:

  • (ArgumentError) 


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# File 'lib/nera/nera_remote_connector.rb', line 23

def initialize( path_db_folder)
  raise ArgumentError unless path_db_folder.is_a?(String)
  
  @db_folders = NERA::DbFolders.new( path_db_folder)
  if File.exist?( @db_folders.path_to_hosts_yaml)
    File.open( @db_folders.path_to_hosts_yaml, 'r') do |io|
      @hosts = YAML.load( io)
    end
  else
    @hosts = []
  end
  raise "Invalid format of hosts.yml" unless valid_hosts?
  @job_records = NERA::JobRecords.new( @db_folders.path_to_jobs_table)
end

Instance Method Details

#check_completion(hostname, passphrase = nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/nera/nera_remote_connector.rb', line 262

def check_completion( hostname, passphrase = nil)
  raise ArgumentError unless hostname.is_a?(String)

  host = @hosts.find do |h| h[:name] == hostname end
  return :connection_failed unless host

  h = { :port => host[:port] }
  h[:passphrase] = passphrase if passphrase
  h[:keys] = host[:keys] if host.has_key?(:keys)

  ls_str = ''
  begin
    $stderr.print "Connecting with #{host[:name]}.....\t"
    Net::SSH.start( host[:host_url], host[:user], h) do |ssh|
      ls_str = ssh.exec!("ls #{host[:job_path]}")
    end
  rescue Errno::ECONNREFUSED => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { ex.to_s }
    return :connection_failed
  rescue Errno::ENETUNREACH => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { ex.to_s }
    return :connection_failed
  rescue SocketError => ex
    $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { ex.to_s }
    return :connection_failed
  rescue Net::SSH::Exception => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { ex.to_s }
    return :connection_failed
  rescue OpenSSL::PKey::RSAError => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { Net::SSH::Exception }
    return :connection_failed
  end
  $stderr.puts "done"
  return finished_list( ls_str)
end

#check_completion_all(passphrase = nil) ⇒ Object 



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# File 'lib/nera/nera_remote_connector.rb', line 316

def check_completion_all( passphrase = nil)
  h = {}
  hostnames.each do |hname|
    h[hname] = check_completion(hname, passphrase)
  end
  return h
end

#download(filenames, hostname, passphrase = nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/nera/nera_remote_connector.rb', line 325

def download( filenames, hostname, passphrase = nil)
  raise ArgumentError unless filenames.is_a?(Array)
  filenames.each do |fname|
    raise ArgumentError unless fname.is_a?(String)
    raise ArgumentError unless fname =~ /.tar.bz2$/
  end
  raise ArgumentError unless hostname.is_a?(String)

  host = @hosts.find do |h| h[:name] == hostname end
  return :connection_failed unless host

  h = { :port => host[:port] }
  h[:passphrase] = passphrase if passphrase
  h[:keys] = host[:keys] if host.has_key?(:keys)

  downloaded = []
  
  begin
    $stderr.puts "Connecting with #{host[:name]}.....\t"
    Net::SSH.start( host[:host_url], host[:user], h) do |ssh|
      target_home = ssh.exec!('echo $HOME').chomp
      target_dir = host[:job_path].sub(/^~/,target_home)
      ls_str = ssh.exec!("ls #{target_dir}")
      d_list = filenames.find_all do |fname| ls_str.include?( fname) end
      ssh.sftp.connect do |sftp|
        d_list.each do |d_file|
          #download
          $stderr.print "  downloading #{d_file}.....\t"
          sftp.download!( target_dir + '/' + d_file, @db_folders.path_to_include_layer + d_file)
          $stderr.puts "done"
          downloaded << d_file
          #delete data file and job script
          $stderr.print "  deleting #{d_file}.....\t"
          sftp.remove!(target_dir + '/' + d_file)
          $stderr.puts "done"
          sh_file = d_file.sub(/tar.bz2$/,'sh')
          $stderr.print "  deleting #{sh_file}.....\t"
          sftp.remove!(target_dir + '/' + sh_file)
          $stderr.puts "done"
          
          @db_folders.logger.info(self.class.to_s) {
            "downloaded a data file (#{d_file}) from #{host[:name]}"
          }
        end
      end
    end
  rescue Errno::ECONNREFUSED => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { ex.inspect }
    return :connection_failed
  rescue Errno::ENETUNREACH => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { ex.inspect }
    return :connection_failed
  rescue SocketError => ex
    $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { ex.inspect }
    return :connection_failed
  rescue Net::SSH::Exception => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { ex.inspect }
    return :connection_failed
  rescue OpenSSL::PKey::RSAError => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { Net::SSH::Exception }
    return :connection_failed
  end
  $stderr.puts "done"
  
  return downloaded
end

#hostnames ⇒ Object 



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# File 'lib/nera/nera_remote_connector.rb', line 53

def hostnames
  @hosts.map do |host| host[:name] end
end

#show_status(hostname, passphrase = nil) ⇒ Object 



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# File 'lib/nera/nera_remote_connector.rb', line 65

def show_status( hostname, passphrase = nil)
  found = @hosts.find do |host|
    host[:name] == hostname
  end
  return :connection_failed unless found
  h = { :port => found[:port], :timeout => 10 }
  h[:keys] = found[:keys] if found.has_key?(:keys)
  h[:passphrase] = passphrase if passphrase
  cmd = 'ps au'
  cmd = found[:show_status_command] if found.has_key?(:show_status_command)
  str = ''
  begin
    $stderr.print "Connecting with #{found[:name]}.....\t"
    Net::SSH.start( found[:host_url], found[:user], h) do |ssh|
      str = ssh.exec!( cmd)
    end
  rescue Errno::ECONNREFUSED => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { Errno::ECONNREFUSED }
    return :connection_failed
  rescue Errno::ENETUNREACH => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { Errno::ENETUNREACH }
    return :connection_failed
  rescue SocketError => ex
    $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { SocketError }
    return :connection_failed
  rescue Net::SSH::Exception => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { Net::SSH::Exception }
    return :connection_failed
  rescue OpenSSL::PKey::RSAError => ex
    $stderr.puts "failed"
    @db_folders.logger.error(self.class.to_s) { Net::SSH::Exception }
    return :connection_failed
  end
  $stderr.puts "done"
  return str
end

#submit(jobids, hostname, passphrase = nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/nera/nera_remote_connector.rb', line 185

def submit( jobids, hostname, passphrase = nil)
  raise ArgumentError unless jobids.is_a?(Array)
  jobids.each do |jid|
    raise ArgumentError unless jid.is_a?(Integer)
  end
  raise ArgumentError unless hostname.is_a?(String)

  host = @hosts.find do |h| h[:name] == hostname end
  return :connection_failed unless host

  return :no_submission_command unless host.has_key?(:submission_command)

  succeeded_jobids = []
  @job_records.transaction {
    jids = []
    jobids.each do |jid|
      jids << jid if @job_records.find_by_id(jid)
    end
    return :no_such_jobs if jids.size == 0
    
    h = { :port => host[:port] }
    h[:passphrase] = passphrase if passphrase
    h[:keys] = host[:keys] if host.has_key?(:keys)

    
    begin
    $stderr.print "Connecting with #{host[:name]}.....\t"
      Net::SSH.start( host[:host_url], host[:user], h) do |ssh|
        ssh.exec("mkdir -p #{host[:job_path]}")
        target_home = ssh.exec!('echo $HOME').chomp
        target_dir = host[:job_path].sub(/^~/,target_home)
        ssh.sftp.connect do |sftp|
          jids.each do |jid|
            pjs = @db_folders.path_to_job_script(jid)
            next unless File.exist?( pjs)
            target_path = target_dir + '/' + File.basename(pjs)
            contents = ''
            File.open( pjs, 'r') do |io| contents = io.readlines end
            contents[0] += "cd #{target_dir}\n"
            sftp.file.open(target_path, "w") do |f| f.puts contents end
            ssh.exec!("chmod +x #{target_path}")
            @job_records.update_to_state_copied( jid, host[:name])
            ssh.exec!("cd #{target_dir} && #{host[:submission_command]} #{target_path}")
            @job_records.update_to_state_submitted( jid, host[:name])
            @db_folders.logger.info(self.class.to_s) {
              "submitted a file (#{File.basename(pjs)}) to #{host[:name]}"
            }
            succeeded_jobids << jid
          end
        end
      end
    rescue Errno::ECONNREFUSED => ex
      $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { ex.inspect }
      return :connection_failed
    rescue Errno::ENETUNREACH => ex
      $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { ex.inspect }
      return :connection_failed
    rescue SocketError => ex
      $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { ex.inspect }
      return :connection_failed
    rescue Net::SSH::Exception => ex
      $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { ex.inspect }
      return :connection_failed
    rescue OpenSSL::PKey::RSAError => ex
      $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { Net::SSH::Exception }
      return :connection_failed
    end
    $stderr.puts "done"
  }
  return succeeded_jobids
end

#submittable_hostnames ⇒ Object 



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# File 'lib/nera/nera_remote_connector.rb', line 57

def submittable_hostnames
  arr = []
  @hosts.each do |host|
    arr << host[:name] if host[:submission_command]
  end
  return arr
end

#transfer(jobids, hostname, passphrase = nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/nera/nera_remote_connector.rb', line 106

def transfer( jobids, hostname, passphrase = nil)
  raise ArgumentError unless jobids.is_a?(Array)
  jobids.each do |jid|
    raise ArgumentError unless jid.is_a?(Integer)
  end
  raise ArgumentError unless hostname.is_a?(String)

  host = @hosts.find do |h| h[:name] == hostname end
  return :connection_failed unless host

  succeeded_jobids = []
  
  @job_records.transaction {
    jids = []
    jobids.each do |jid|
      jids << jid if @job_records.find_by_id(jid)
    end
    return :no_such_jobs if jids.size == 0
    
    h = { :port => host[:port] }
    h[:passphrase] = passphrase if passphrase
    h[:keys] = host[:keys] if host.has_key?(:keys)

    begin
    $stderr.print "Connecting with #{host[:name]}.....\t"
      Net::SSH.start( host[:host_url], host[:user], h) do |ssh|
        ssh.exec("mkdir -p #{host[:job_path]}")
        target_home = ssh.exec!('echo $HOME').chomp
        target_dir = host[:job_path].sub(/^~/,target_home)
        ssh.sftp.connect do |sftp|
          jids.each do |jid|
            pjs = @db_folders.path_to_job_script(jid)
            target_path = target_dir + '/' + File.basename(pjs)
            next unless File.exist?( pjs)
            contents = ''
            File.open( pjs, 'r') do |io| contents = io.readlines end
            contents[0] += "cd #{target_dir}\n"
            sftp.file.open(target_path, "w") do |f| f.puts contents end
            ssh.exec!("chmod +x #{target_path}")
            @job_records.update_to_state_copied( jid, host[:name])
            @db_folders.logger.info(self.class.to_s) {
              "transfered a file (#{File.basename(pjs)}) to #{host[:name]}"
            }
            succeeded_jobids << jid
          end
        end
      end
    rescue Errno::ECONNREFUSED => ex
      $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { ex.inspect }
      return :connection_failed
    rescue Errno::ENETUNREACH => ex
      $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { ex.inspect }
      return :connection_failed
    rescue SocketError => ex
      $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { ex.inspect }
      return :connection_failed
    rescue Net::SSH::Exception => ex
      $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { ex.inspect }
      return :connection_failed
    rescue OpenSSL::PKey::RSAError => ex
      $stderr.puts "failed"
      @db_folders.logger.error(self.class.to_s) { Net::SSH::Exception }
      return :connection_failed
    end
    $stderr.puts "done"
  }
  return succeeded_jobids
end