Module: KL

Defined in:
lib/kldockeragent.rb,
lib/kldockeragent/net.rb,
lib/kldockeragent/agent.rb,
lib/kldockeragent/helper.rb,
lib/kldockeragent/commands.rb

Defined Under Namespace

Modules: Agent Classes: Api, Notifier, Server

Class Method Summary collapse

Class Method Details

.Command_notifyStatus ⇒ Object 



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# File 'lib/kldockeragent/commands.rb', line 22

def KL.Command_notifyStatus
  KL.logger.info '[command] Sending instance update...'
  data = KL.prepare_agent_data
  uri = "#{KL.config['notifier']['server']}/api/1.0/nodes/data"
  headers_auth = KL.getAuthorizationHeaders('/api/1.0/nodes/data', data.to_json)
  res = KL.net_post_json(uri, data.to_json, headers_auth)
  if res.is_a?(Net::HTTPSuccess)
    KL.logger.info '[command] Agent notification successfully executed.'
  else
    KL.logger.info '[command] An error has occurred trying to notify update.'
  end
end

.Command_registerNewAgent ⇒ Object 



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# File 'lib/kldockeragent/commands.rb', line 2

def KL.Command_registerNewAgent
  KL.logger.info '[command] Registering new agent...'
  agent = KL::Agent.getUUID
  data = KL.prepare_agent_register_data(agent)
  uri = "#{KL.config['notifier']['server']}/api/1.0/nodes/register"
  res = KL.net_post_json(uri, data.to_json)

  if res.is_a?(Net::HTTPSuccess)
    response = JSON.parse(res.body)
    registry = {
      agent: agent,
      server: response['code']
    }
    KL.create_registry_file(registry)
    KL.logger.info '[command] Agent registration has been completed correctly'
  else
    KL.logger.info '[command] An error has occurred trying to register agent.'
  end
end

.config ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 34

def KL.config
  configFile = "#{KL.home}/kldockeragent.json"
  KL.create_default_config(configFile, KL.logger) if !File.exist?(configFile)
    config_json = File.read(configFile)
    config_data = JSON.parse(config_json)
    config_data
end

.create_default_config(file, logger) ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 6

def KL.create_default_config(file, logger)
  File.open(file, File::RDWR|File::CREAT, 0644) { |f|
    f.flock(File::LOCK_EX)
    value = '{"api":{"port":3344,"ssl":false},"notifier":{"server":"https://hub.kytoonlabs.com:4444","rate":120}}'
    f.rewind
    f.write(value.to_s)
    f.flush
    f.truncate(f.pos)
  }
  logger.info "[config] Default config file has been created at {#{file}}" if logger
end

.create_registry_file(data) ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 65

def KL.create_registry_file(data)
  file = "#{KL.home}/kldockeragent.registry"
  File.open(file, File::RDWR|File::CREAT, 0644) { |f|
    f.flock(File::LOCK_EX)
    f.rewind
    f.write(data.to_json.to_s)
    f.flush
    f.truncate(f.pos)
  }
  logger.info "[config] Registry config file has been created at {#{file}}" if logger
end

.generateHash(url, json_data, private_key) ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 104

def KL.generateHash(url, json_data, private_key)
  data = "#{url}#{json_data}"
  hash_data = OpenSSL::HMAC.hexdigest(OpenSSL::Digest.new('sha1'), private_key, data)
  hash_data 
end

.getApplicationId ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 82

def KL.getApplicationId
  if (KL.server_registered)
    registry = KL.getRegistryData
    id = registry['agent']
  else
    id = SecureRandom.uuid
  end
  id
end

.getApplicationInfo(name, filter) ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 176

def KL.getApplicationInfo(name, filter)
  output = ""
  if (name.include? filter)
    output = name.gsub(filter,'')
  end
  return output
end

.getAuthorizationHeaders(url, json_data) ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 92

def KL.getAuthorizationHeaders(url, json_data)
  headers = {}
  if (KL.server_registered)
    registry = KL.getRegistryData
    hash_data = KL.generateHash(url, json_data, registry['agent'])
    auth_code = "#{registry['server']}:#{hash_data}"
    headers = {}
    headers['Authorization'] = auth_code
  end
  headers
end

.getDockerConfigData(container) ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 139

def KL.getDockerConfigData(container)
  query = `docker stats --no-stream #{container}`
  query.gsub!(/\r\n?/, "\n")
  keys = Array.new
  values = Array.new
  out = '{'
  i = 0
  query.each_line do |line|
    data = line.split('  ')
    data.each do |value|
      if (value.strip != '')
        if (i == 0)
          keys.push(value.strip)
        else
          values.push(value.strip)
        end
      end
    end
    i = i + 1
  end
  i = 0
  keys.each do |key|
    if (i > 0)
      out = out + ','
    end
      out = out + "\"#{key}\":\"#{values[i]}\""
      i = i + 1
  end
  out = out + '}'

  return JSON.parse(out)
end

.getRegistryData ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 77

def KL.getRegistryData
  json_reg = JSON.parse(File.open("#{KL.home}/kldockeragent.registry").read)
  json_reg
end

.home ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 29

def KL.home
  home = ((Process.euid == 0 and File.directory?('/var')) ? '/var/kldockerpagent' : File.expand_path(Dir.home + '/.kldockeragent'))
  home
end

.logger ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 18

def KL.logger
  home = KL.home
  Dir.mkdir(home, 0700) if not File.exist?(home)
  logFile = "#{home}/kldockeragent.log"
  log = WEBrick::Log.new(logFile, WEBrick::BasicLog::INFO ||
                                       WEBrick::BasicLog::ERROR ||
                                       WEBrick::BasicLog::FATAL ||
                                       WEBrick::BasicLog::WARN)
  log
end

.net_post_json(url, data, headers = []) ⇒ Object 



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# File 'lib/kldockeragent/net.rb', line 4

def KL.net_post_json(url, data, headers = [])
  KL.logger.info "[net] Posting JSON to #{url} => #{data}"
  
  uri = URI(url)
  
  req = Net::HTTP::Post.new(uri)
  req.content_type = 'application/json'
  req.body = data
  req['X-Kytoonlabs-Docker-Agent'] = KL::Agent.getUUID[0..13].gsub(/\s\w+\s*$/, '')
  headers.each do |key, value|
    req[key] = value
  end

  Net::HTTP.start(uri.hostname, uri.port, :use_ssl => uri.scheme == 'https') do |http|
       @res = http.request req
  end
  KL.logger.info "[net] Response Code: #{@res.code}, Response Body: #{@res.body}"
  @res
end

.prepare_agent_data ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 110

def KL.prepare_agent_data
  data = {
    system_info: KL.Request_getSystemInfo,
    docker_info: KL.Request_getDockerListAllApplications,
    agent_version: KL::Agent.getVersion
  }
  data

end

.prepare_agent_register_data(hash) ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 53

def KL.prepare_agent_register_data(hash)
  data = {
    private_hash: hash,
    hostname: `hostname`.gsub("\n",""),
    system_info: `uname -a`.gsub("\n",""),
    docker_version: `docker --version`.gsub("\n","").gsub("Docker version ",""),
    agent_version: KL::Agent.getVersion,
    ip_address: IPSocket.getaddress(Socket.gethostname) 
  }
  data
end

.publish_json(json_object, st = 200) ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 48

def KL.publish_json(json_object, st = 200)
  status st
  content_type :json
  json_object.to_json   
end

.removeEmptyObjects(json) ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 172

def KL.removeEmptyObjects(json)
  return json.gsub('{}','""')
end

.Request_getDockerListAllApplications ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 120

def KL.Request_getDockerListAllApplications
  filter = '_klac'
  apps = Array.new
    query = `docker ps --format="{{.ID}}::{{.Names}}::{{.Status}}::{{.Image}}"`
    query.gsub!(/\r\n?/, "\n")
    query.each_line do |line|
        data = line.split('::')
        apps.push({
          'id' => data[0], 
          'name' => data[1],
          'status'=>data[2],
          'image'=>data[3].gsub("\n",""),
          'stats'=>KL.getDockerConfigData(data[0]),
          'application' => KL.getApplicationInfo(data[1], filter)
          })
    end
    return apps
end

.Request_getSystemInfo ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 184

def KL.Request_getSystemInfo
  usw = Usagewatch
  info = {}
  if KL::Agent.is_linux
    info['os'] = 'linux'
    info['diskused'] = usw.uw_diskused.to_s
    info['diskused_perc'] = usw.uw_diskused_perc.to_s
    info['cpuused'] = usw.uw_cpuused.to_s
    info['memused'] = usw.uw_memused.to_s
  else
    info['os'] = 'not linux'
  end 
  info
end

.server_registered ⇒ Object 



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# File 'lib/kldockeragent/helper.rb', line 42

def KL.server_registered
  registryFile = "#{KL.home}/kldockeragent.registry"
  reg = File.exist?(registryFile)
  reg
end