Class: Datacenter::Machine

Inherits:
Object
  • Object
show all
Defined in:
lib/datacenter/machine.rb

Defined Under Namespace

Classes: DiskPartition

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(shell = nil) ⇒ Machine

Returns a new instance of Machine.



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# File 'lib/datacenter/machine.rb', line 6

def initialize(shell=nil)
  @shell = shell || Shell::Local.new
end

Instance Attribute Details

#shell ⇒ Object (readonly)

Returns the value of attribute shell.



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# File 'lib/datacenter/machine.rb', line 4

def shell
  @shell
end

Instance Method Details

#cores ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 29

def cores
  shell.run('nproc').to_i
end

#cpu ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 25

def cpu
  cpuinfo['model name']
end

#disk_partitions ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 57

def disk_partitions
  partitions.map { |p| DiskPartition.new p }
end

#ips ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 10

def ips
  shell.run('ifconfig')
       .split("\n")
       .select { |l| l.strip.start_with? 'inet ' }
       .map { |l| l.match(/(([0-9]+\.){3}[0-9]+)/).to_s }
end

#memory ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 33

def memory
  meminfo['MemTotal'].to_i / 1024.0
end

#memory_free ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 37

def memory_free
  meminfo['MemFree'].to_i / 1024.0
end

#memory_used ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 41

def memory_used
  memory - memory_free
end

#name ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 17

def name
  shell.run('hostname').strip
end

#os ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 21

def os
  @os ||= OS.new shell
end

#processes(filter = '') ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 61

def processes(filter='')
  if filter.empty?
    command = 'ps aux'
    start = 1
  else
    command = "ps aux | grep \"#{filter}\" | grep -v grep"
    start =  0
  end
  shell.run(command)
       .split("\n")[start..-1]
       .map { |l| Process.new l.split[1].to_i, shell }
end

#swap ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 45

def swap
  meminfo['SwapTotal'].to_i / 1024.0
end

#swap_free ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 49

def swap_free
  meminfo['SwapFree'].to_i / 1024.0
end

#swap_used ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 53

def swap_used
  swap - swap_free
end

#top(order, n = 10) ⇒ Object 



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# File 'lib/datacenter/machine.rb', line 74

def top(order, n=10)
  mappings = {memory: 'rss', pid: 'pid', cpu: '%cpu'}
  shell.run("ps aux --sort -#{mappings[order]} | head -n #{n+1}")
       .split("\n")[1..-1]
       .map { |l| Process.new l.split[1], shell }
end