Class: Fluent::Plugin::ProcInfo::Process

Inherits:
Object
  • Object
show all
Defined in:
lib/fluent/plugin/proc_info/process.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pid: nil, pid_file: nil, eventer: nil, logger: nil) ⇒ Process

Returns a new instance of Process.



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# File 'lib/fluent/plugin/proc_info/process.rb', line 11

def initialize(pid: nil, pid_file: nil, eventer: nil, logger: nil)
  @pid = pid
  @pid_file = pid_file
  @eventer = eventer
  @logger = logger

  validate_pid
end

Instance Attribute Details

#eventer ⇒ Object (readonly)

Returns the value of attribute eventer.



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# File 'lib/fluent/plugin/proc_info/process.rb', line 9

def eventer
  @eventer
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/fluent/plugin/proc_info/process.rb', line 9

def logger
  @logger
end

Instance Method Details

#probe(probes: []) ⇒ Object 



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# File 'lib/fluent/plugin/proc_info/process.rb', line 20

def probe(probes: [])
  events = []

  probes.each do |probe|
    events += send("probe_#{probe}")
  rescue StandardError => e
    log.error("Process probe error with probe `#{probe}`: #{e}")
  end

  events
end

#probe_net ⇒ Object 



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# File 'lib/fluent/plugin/proc_info/process.rb', line 32

def probe_net
  probe_net_tcp + probe_net_udp
end

#probe_net_tcp ⇒ Object 



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# File 'lib/fluent/plugin/proc_info/process.rb', line 36

def probe_net_tcp
  net_inodes = proc.pid(pid).fd.select { |fd| fd.type == 'socket' }.map(&:inode)
  proc_net_tcp = proc.net.tcp
  tcp_sockets = net_inodes.map { |net_inode| proc_net_tcp.by_inode(net_inode) }.compact

  incomings = {}
  outgoings = {}
  remainings = []

  local_port_groups = tcp_sockets.group_by(&:local_port)
  local_port_groups.each_value do |sockets|
    next if sockets.empty?

    if sockets.size == 1 && sockets.first.state_str != 'LISTEN'
      remainings << sockets.first
      next
    end
    incomings.update(sockets.group_by { |socket| [socket.local_port, socket.state_str] })
  end

  r_tcp_sockets = remainings
  remainings = []
  remote_port_groups = r_tcp_sockets.group_by(&:remote_port)
  remote_port_groups.each_value do |sockets|
    next if sockets.empty?

    if sockets.size == 1
      remainings << sockets.first
      next
    end
    outgoings.update(sockets.group_by { |socket| [socket.remote_port, socket.state_str] })
  end

  remainings = remainings.group_by(&:state_str)

  events = incomings.map do |group_attrs, sockets|
    eventer.generate_event(
      name: 'connection_count',
      value: sockets.size,
      metadata: {
        protocol: 'tcp',
        direction: 'in',
        port: group_attrs[0],
        state: group_attrs[1]
      }
    )
  end
  outgoings.each do |group_attrs, sockets|
    events << eventer.generate_event(
      name: 'connection_count',
      value: sockets.size,
      metadata: {
        protocol: 'tcp',
        direction: 'out',
        port: group_attrs[0],
        state: group_attrs[1]
      }
    )
  end
  remainings.each do |state, sockets|
    events << eventer.generate_event(
      name: 'connection_count',
      value: sockets.size,
      metadata: {
        protocol: 'tcp',
        direction: 'unknown',
        port: nil,
        state: state
      }
    )
  end

  events
end

#probe_net_udp ⇒ Object 



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# File 'lib/fluent/plugin/proc_info/process.rb', line 111

def probe_net_udp
  []
end