Class: OsCtl::Cli::Top::Tui::Main

Inherits:
Screen
  • Object
show all
Includes:
Utils::Humanize
Defined in:
lib/osctl/cli/top/tui/main.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Utils::Humanize

#break_interval, #format_long_duration, #format_percent, #format_short_duration, #humanize_data, #humanize_time_ns, #parse_data

Constructor Details

#initialize(model, rate) ⇒ Main

Returns a new instance of Main



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# File 'lib/osctl/cli/top/tui/main.rb', line 8

def initialize(model, rate)
  @model = model
  @rate = rate
  @last_measurement = nil
  @last_count = nil
  @sort_index = 0
  @sort_desc = true
  @current_row = nil
  @highlighted_cts = []
  @status_bar_cols = 0
end

Instance Attribute Details

#current_row ⇒ Object (protected)

Returns the value of attribute current_row



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# File 'lib/osctl/cli/top/tui/main.rb', line 111

def current_row
  @current_row
end

#highlighted_cts ⇒ Object (readonly, protected)

Returns the value of attribute highlighted_cts



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# File 'lib/osctl/cli/top/tui/main.rb', line 110

def highlighted_cts
  @highlighted_cts
end

#last_count ⇒ Object (protected)

Returns the value of attribute last_count



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# File 'lib/osctl/cli/top/tui/main.rb', line 111

def last_count
  @last_count
end

#last_data ⇒ Object (protected)

Returns the value of attribute last_data



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# File 'lib/osctl/cli/top/tui/main.rb', line 111

def last_data
  @last_data
end

#last_measurement ⇒ Object (protected)

Returns the value of attribute last_measurement



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# File 'lib/osctl/cli/top/tui/main.rb', line 111

def last_measurement
  @last_measurement
end

#model ⇒ Object (readonly, protected)

Returns the value of attribute model



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# File 'lib/osctl/cli/top/tui/main.rb', line 110

def model
  @model
end

#rate ⇒ Object (readonly, protected)

Returns the value of attribute rate



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# File 'lib/osctl/cli/top/tui/main.rb', line 110

def rate
  @rate
end

Instance Method Details

#bold ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 599

def bold
  Curses.attron(Curses::A_BOLD)
  yield
  Curses.attroff(Curses::A_BOLD)
end

#cursor ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 611

def cursor
  res = ''

  $stdin.raw do |stdin|
    $stdout << "\e[6n"
    $stdout.flush
    while (c = stdin.getc) != 'R'
      res << c if c
    end
  end

  m = res.match /(?<row>\d+);(?<column>\d+)/
  [m[:column].to_i, m[:row].to_i]
end

#fillRow ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 605

def fillRow
  yield
  x, y = cursor
  Curses.addstr(' ' * (Curses.cols - x))
end

#format_ctid(ctid) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 591

def format_ctid(ctid)
  if ctid.length > 12
    ctid[0..11] + '..'
  else
    ctid
  end
end

#get_data ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 422

def get_data
  ret = model.data

  ret[:containers].sort! do |a, b|
    sortable_value(a) <=> sortable_value(b)
  end

  ret[:containers].reverse! if @sort_desc
  ret
end

#header(pos) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 272

def header(pos)
  unless @header
    ret = []

    ret << sprintf(
      '%-14s %7s %8s %6s %27s %27s',
      'Container',
      'CPU',
      'Memory',
      'Proc',
      'BlkIO          ',
      'Network        '
    )

    ret << sprintf(
      '%-14s %7s %7s %6s %13s %13s %13s %13s',
      '',
      '',
      '',
      '',
      'Read   ',
      'Write   ',
      'TX    ',
      'RX    '
    )

    ret << sprintf(
      '%-14s %7s %7s %6s %6s %6s %6s %6s %6s %6s %6s %6s',
      'ID',
      '',
      '',
      '',
      'Bytes',
      rt? ? 'IOPS' : 'IO',
      'Bytes',
      rt? ? 'IOPS' : 'IO',
      rt? ? 'bps' : 'Bytes',
      rt? ? 'pps' : 'Packet',
      rt? ? 'bps' : 'Bytes',
      rt? ? 'pps' : 'Packet'
    )

    # Fill to the edge of the screen
    @header = ret.map do |line|
      line << (' ' * (Curses.cols - line.size)) << "\n"
    end
  end

  @header.each do |line|
    Curses.setpos(pos, 0)
    Curses.addstr(line)
    pos += 1
  end

  pos
end

#loadavg ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 579

def loadavg
  File.read('/proc/loadavg').strip.split(' ')[0..2].join(', ')
end

#lookup_field(ct, field) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 570

def lookup_field(ct, field)
  if field.is_a?(Array)
    field.reduce(ct) { |acc, v| acc[v] }

  else
    ct[field]
  end
end

#max_rows ⇒ Object (protected)

Screen without header and footer



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# File 'lib/osctl/cli/top/tui/main.rb', line 627

def max_rows
  Curses.lines - @status_bar_cols - 1 - @header.size - 5 - 1
end

#mode ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 583

def mode
  model.mode
end

#open ⇒ Object 



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# File 'lib/osctl/cli/top/tui/main.rb', line 20

def open
  unless last_measurement
    render(Time.now, {containers: []})
    sleep(0.5)
  end

  # At each loop pass, model is queried for data, unless `hold_data` is
  # greater than zero. In that case, `hold_data` is decremented by 1
  # on each pass.
  hold_data = 0

  loop do
    now = Time.now

    if !paused? && (last_measurement.nil? || (now - last_measurement) >= rate)
      model.measure
      self.last_measurement = now
    end

    if !last_data || hold_data == 0
      @last_data = data = get_data

    elsif hold_data > 0
      hold_data -= 1
      data = last_data
    end

    Curses.clear if last_count != data[:containers].count
    self.last_count = data[:containers].count

    render(now, data)
    Curses.timeout = rate * 1000

    case Curses.getch
    when 'q'
      return

    when Curses::Key::LEFT, '<'
      Curses.clear
      sort_next(-1)

    when Curses::Key::RIGHT, '>'
      Curses.clear
      sort_next(+1)

    when Curses::Key::UP
      selection_up
      hold_data = 1

    when Curses::Key::DOWN
      selection_down
      hold_data = 1

    when ' '
      selection_highlight

    when Curses::Key::ENTER, 10
      selection_open

    when 'r', 'R'
      Curses.clear
      sort_inverse

    when 'm'
      modes = model.class::MODES
      i = modes.index(mode)

      if i+1 >= modes.count
        model.mode = modes[0]

      else
        model.mode = modes[i+1]
      end

      @header = nil
      Curses.clear

    when 'p'
      paused? ? unpause : pause

    when '?'
      return Tui::Help.new(self)

    when Curses::Key::RESIZE
      Curses.clear
    end
  end
end

#pause ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 631

def pause
  @paused = true
end

#paused? ⇒ Boolean (protected)

Returns:

  • (Boolean) 


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# File 'lib/osctl/cli/top/tui/main.rb', line 639

def paused?
  @paused
end

#print_row(ct) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 329

def print_row(ct)
  Curses.addstr(sprintf('%-14s ', format_ctid(ct[:id])))

  print_row_data([
    rt? ? format_percent(ct[:cpu_usage]) : humanize_time_ns(ct[:cpu_time]),
    humanize_data(ct[:memory]),
    ct[:nproc],
    humanize_data(ct[:blkio][:bytes][:r]),
    ct[:blkio][:iops][:r],
    humanize_data(ct[:blkio][:bytes][:w]),
    ct[:blkio][:iops][:w],
    humanize_data(ct[:tx][:bytes]),
    humanize_data(ct[:tx][:packets]),
    humanize_data(ct[:rx][:bytes]),
    humanize_data(ct[:rx][:packets])
  ])
end

#print_row_data(values) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 347

def print_row_data(values)
  fmts = %w(%7s %8s %6s %6s %6s %6s %6s %6s %6s %6s %6s)
  w = 15 # container ID is printed in {#print_row}

  fmts.zip(values).each_with_index do |pair, i|
    f, v = pair
    s = sprintf("#{f} ", v)
    w += s.length

    Curses.attron(Curses::A_BOLD) if i == @sort_index
    Curses.addstr(s)
    Curses.attroff(Curses::A_BOLD) if i == @sort_index
  end

  # Fill space to the edge of the screen, needed for selected rows
  Curses.addstr(' ' * (Curses.cols - w)) if Curses.cols > w
end

#render(t, data) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 113

def render(t, data)
  Curses.setpos(0, 0)
  Curses.addstr("#{File.basename($0)} ct top - #{t.strftime('%H:%M:%S')}")
  Curses.addstr(" #{model.mode} mode, load average #{loadavg}")

  i = status_bar(1, data)

  Curses.attron(Curses.color_pair(1))
  i = header(i+1)
  Curses.attroff(Curses.color_pair(1))

  data[:containers].each_with_index do |ct, j|
    Curses.setpos(i, 0)

    if current_row == j && highlighted_cts.include?(ct[:id])
      attr = Curses.color_pair(Tui::SELECTED_HIGHLIGHTED)

    elsif current_row == j
      attr = Curses.color_pair(Tui::SELECTED)

    elsif highlighted_cts.include?(ct[:id])
      attr = Curses.color_pair(Tui::HIGHLIGHTED)

    else
      attr = nil
    end

    Curses.attron(attr) if attr
    print_row(ct)
    Curses.attroff(attr) if attr

    i += 1

    break if i >= (Curses.lines - 5)
  end

  stats(data[:containers])

  Curses.refresh
end

#rt? ⇒ Boolean (protected)

Returns:

  • (Boolean) 


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# File 'lib/osctl/cli/top/tui/main.rb', line 587

def rt?
  model.mode == :realtime
end

#selection_down ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 496

def selection_down
  if @current_row
    new_row = @current_row + 1

    if new_row < last_data[:containers].size && new_row < max_rows
      @current_row = new_row

    elsif last_data[:containers].any?
      @current_row = 0

    else
      @current_row = nil
    end

  elsif last_data[:containers].any?
    @current_row = 0
  end
end

#selection_highlight ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 515

def selection_highlight
  return unless @current_row

  ct = last_data[:containers][@current_row]
  return unless ct

  ctid = ct[:id]

  if highlighted_cts.include?(ctid)
    highlighted_cts.delete(ctid)

  else
    highlighted_cts << ctid
  end
end

#selection_open ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 531

def selection_open
  return unless @current_row

  ct = last_data[:containers][@current_row]
  return unless ct

  if ct[:id] == '[host]'
    ctid = 'host'

  else
    ctid = "#{ct[:pool]}:#{ct[:id]}"
  end

  pid = Process.fork do
    Process.exec('htop', '-c', ctid)
  end

  Process.wait(pid)

  # The screen needs to be reinitialized after htop
  Curses.init_screen
  Curses.start_color
  Curses.crmode
  Curses.stdscr.keypad = true
  Curses.curs_set(0)  # hide cursor
  Curses.clear
end

#selection_up ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 472

def selection_up
  last_row = [max_rows - 1, last_data[:containers].size - 1].min

  if @current_row
    new_row = @current_row - 1

    if new_row >= 0
      @current_row = new_row

    elsif new_row == -1
      @current_row = nil

    elsif last_data[:containers].any?
      @current_row = last_row

    else
      @current_row = nil
    end

  elsif last_data[:containers].any?
    @current_row = last_row
  end
end

#sort_inverse ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 451

def sort_inverse
  @sort_desc = !@sort_desc
end

#sort_next(n) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 437

def sort_next(n)
  next_i = @sort_index + n
  fields = sortable_fields

  if next_i < 0
    next_i = fields.count - 1

  elsif next_i >= fields.count
    next_i = 0
  end

  @sort_index = next_i
end

#sortable_fields ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 455

def sortable_fields
  ret = []
  ret << (rt? ? :cpu_usage : :cpu_time)
  ret.concat([
    :memory,
    :nproc,
    [:blkio, :bytes, :r],
    [:blkio, :iops, :r],
    [:blkio, :bytes, :w],
    [:blkio, :iops, :w],
    [:tx, :bytes],
    [:tx, :packets],
    [:rx, :bytes],
    [:rx, :packets],
  ])
end

#sortable_value(ct) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 433

def sortable_value(ct)
  lookup_field(ct, sortable_fields[@sort_index])
end

#stats(cts) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 365

def stats(cts)
  Curses.setpos(Curses.lines - 5, 0)
  Curses.addstr('─' * Curses.cols)
  #Curses.addstr('-' * Curses.cols)

  Curses.setpos(Curses.lines - 4, 0)
  Curses.addstr(sprintf('%-14s ', 'Containers:'))
  print_row_data([
    rt? ? format_percent(sum(cts, :cpu_usage, false)) \
        : humanize_time_ns(sum(cts, :cpu_time, false)),
    humanize_data(sum(cts, :memory, false)),
    sum(cts, :nproc, false),
    humanize_data(sum(cts, [:blkio, :bytes, :r], false)),
    sum(cts, [:blkio, :iops, :r], false),
    humanize_data(sum(cts, [:blkio, :bytes, :w], false)),
    sum(cts, [:blkio, :iops, :w], false),
    humanize_data(sum(cts, [:tx, :bytes], false)),
    humanize_data(sum(cts, [:tx, :packets], false)),
    humanize_data(sum(cts, [:rx, :bytes], false)),
    humanize_data(sum(cts, [:rx, :packets], false))
  ])

  Curses.setpos(Curses.lines - 3, 0)
  Curses.addstr(sprintf('%-14s ', 'All:'))
  print_row_data([
    rt? ? format_percent(sum(cts, :cpu_usage, true)) \
        : humanize_time_ns(sum(cts, :cpu_time, true)),
    humanize_data(sum(cts, :memory, true)),
    sum(cts, :nproc, true),
    humanize_data(sum(cts, [:blkio, :bytes, :r], true)),
    sum(cts, [:blkio, :iops, :r], true),
    humanize_data(sum(cts, [:blkio, :bytes, :w], true)),
    sum(cts, [:blkio, :iops, :w], true),
    humanize_data(sum(cts, [:tx, :bytes], true)),
    humanize_data(sum(cts, [:tx, :packets], true)),
    humanize_data(sum(cts, [:rx, :bytes], true)),
    humanize_data(sum(cts, [:rx, :packets], true))
  ])

  Curses.setpos(Curses.lines - 2, 0)
  Curses.addstr('─' * Curses.cols)
  Curses.setpos(Curses.lines - 1, 0)
  fillRow do
    Curses.addstr('Selected container: ')

    if @current_row && (ct = last_data[:containers][@current_row])
      if ct[:id] == '[host]'
        Curses.addstr('host system')
      else
        Curses.addstr("#{ct[:pool]}:#{ct[:id]}")
      end
    else
      Curses.addstr('none')
    end
  end
end

#status_bar(orig_pos, data) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 154

def status_bar(orig_pos, data)
  pos = orig_pos
  @status_bar_cols = 0

  # CPU
  cpu = data[:cpu]

  Curses.setpos(pos, 0)
  Curses.addstr('%CPU: ')

  if cpu
    bold { Curses.addstr(sprintf('%5.1f', format_percent(cpu[:user]))) }
    Curses.addstr(' us, ')
    bold { Curses.addstr(sprintf('%5.1f', format_percent(cpu[:system]))) }
    Curses.addstr(' sy, ')
    bold { Curses.addstr(sprintf('%5.1f', format_percent(cpu[:nice]))) }
    Curses.addstr(' ni, ')
    bold { Curses.addstr(sprintf('%5.1f', format_percent(cpu[:idle]))) }
    Curses.addstr(' id, ')
    bold { Curses.addstr(sprintf('%5.1f', format_percent(cpu[:iowait]))) }
    Curses.addstr(' wa, ')
    bold { Curses.addstr(sprintf('%5.1f', format_percent(cpu[:irq]))) }
    Curses.addstr(' hi, ')
    bold { Curses.addstr(sprintf('%5.1f', format_percent(cpu[:softirq]))) }
    Curses.addstr(' si')

  else
    Curses.addstr('calculating')
  end

  # Memory
  mem = data[:memory]

  Curses.setpos(pos += 1, 0)
  Curses.addstr('Memory: ')

  if mem
    bold { Curses.addstr(sprintf('%8s', humanize_data(mem[:total]))) }
    Curses.addstr(' total, ')
    bold { Curses.addstr(sprintf('%8s', humanize_data(mem[:free]))) }
    Curses.addstr(' free, ')
    bold { Curses.addstr(sprintf('%8s', humanize_data(mem[:used]))) }
    Curses.addstr(' used, ')
    bold { Curses.addstr(sprintf('%8s', humanize_data(mem[:buffers] + mem[:cached]))) }
    Curses.addstr(' buff/cache')

    if mem[:swap_total] > 0
      Curses.setpos(pos += 1, 0)
      Curses.addstr('Swap:   ')

      bold { Curses.addstr(sprintf('%8s', humanize_data(mem[:swap_total]))) }
      Curses.addstr(' total, ')
      bold { Curses.addstr(sprintf('%8s', humanize_data(mem[:swap_free]))) }
      Curses.addstr(' free, ')
      bold { Curses.addstr(sprintf('%8s', humanize_data(mem[:swap_used]))) }
      Curses.addstr(' used')
    end

  else
    Curses.addstr('calculating')
  end

  # ZFS ARC
  arc = data[:zfs] && data[:zfs][:arc]

  Curses.setpos(pos += 1, 0)
  Curses.addstr('ARC:    ')

  if arc
    bold { Curses.addstr(sprintf('%8s', humanize_data(arc[:c_max]))) }
    Curses.addstr(' c_max, ')
    bold { Curses.addstr(sprintf('%8s', humanize_data(arc[:c]))) }
    Curses.addstr(' c,    ')
    bold { Curses.addstr(sprintf('%8s', humanize_data(arc[:size]))) }
    Curses.addstr(' size, ')
    bold { Curses.addstr(sprintf('%8.2f', format_percent(arc[:hit_rate]))) }
    Curses.addstr(' hitrate, ')
    bold { Curses.addstr(sprintf('%6d', arc[:misses])) }
    Curses.addstr(' missed ')

  else
    Curses.addstr('calculating')
  end

  l2arc = data[:zfs] && data[:zfs][:l2arc]

  if l2arc && l2arc[:size] > 0
    Curses.setpos(pos += 1, 0)
    Curses.addstr('L2ARC:  ' + ' ' * 16)

    bold { Curses.addstr(sprintf('%8s', humanize_data(l2arc[:size]))) }
    Curses.addstr(' size, ')
    bold { Curses.addstr(sprintf('%8s', humanize_data(l2arc[:asize]))) }
    Curses.addstr(' asize,')
    bold { Curses.addstr(sprintf('%8.2f', humanize_data(l2arc[:hit_rate]))) }
    Curses.addstr(' hitrate, ')
    bold { Curses.addstr(sprintf('%6d', l2arc[:misses])) }
    Curses.addstr(' missed ')
  end

  # Containers
  Curses.setpos(pos += 1, 0)
  Curses.addstr('Containers: ')
  bold { Curses.addstr(sprintf('%3d', model.containers.count)) }
  Curses.addstr(' total, ')
  bold { Curses.addstr(sprintf('%3d', model.containers.count{ |ct| ct.state == :starting })) }
  Curses.addstr(' starting, ')
  bold { Curses.addstr(sprintf('%3d', data[:containers].count-1)) } # -1 for [host]
  Curses.addstr(' running, ')
  bold { Curses.addstr(sprintf('%3d', model.containers.count{ |ct| ct.state == :stopping })) }
  Curses.addstr(' stopping, ')
  bold { Curses.addstr(sprintf('%3d', model.containers.count{ |ct| ct.state == :stopped })) }
  Curses.addstr(' stopped')

  @status_bar_cols += pos - orig_pos + 1
  pos + 1
end

#sum(cts, field, host) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 559

def sum(cts, field, host)
  cts.inject(0) do |acc, ct|
    if ct[:id] == '[host]' && !host
      acc

    else
      acc + lookup_field(ct, field)
    end
  end
end

#unpause ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 635

def unpause
  @paused = false
end