Class: Distem::Node::Admin

Inherits:

Object

• Object
• Distem::Node::Admin

show all

Defined in:

lib/distem/node/admin.rb

Overview

Constant Summary

PATH_DISTEM_LOGS =

The directory used to store distem logs

'/var/log/distem/'

PATH_DISTEMTMP =

The directory used to store temporary files

'/tmp/distem/'

PATH_SYSV_CGROUP =

The cgroups directory to use

'/dev/cgroup'

MAX_VIFACES =

The default maximum number of virual network interfaces (used with ifb)

64

MAX_PTY =

The default maximum number of PTY creatable on the physical machine

8192

@@vifaces_max =

The maximal number of virtual network interfaces that can be created on this machine

MAX_VIFACES

Class Method Summary (collapse)

• + (Boolean) has_systemd?
• + (Object) init_node(pnode, properties)

  Initialize a physical node (set cgroups, bridge, ifb, fill the PNode cpu and memory informations, …) ==== Attributes * pnode The PNode object that will be filled with different informations * properties An hash containing specific initialization parameters (max_vifaces,).

• + (Object) quit_node

  Clean and unset all content set by the system (remove cgroups, bridge, ifb, temporary files, …).

• + (Object) set_cgroups

  Initialize (mount) the CGroup filesystem that will be used by the system (LXC, …).

• + (Object) set_pty(num = MAX_PTY)
• + (Object) unset_cgroups

  Clean (umount) the CGroup filesystem used by the system.

• + (Object) vifaces_max

  Get the maximal number of vnodes that can be create on this machine ==== Returns Fixnum.

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# File 'lib/distem/node/admin.rb', line 53

def self.has_systemd?
  return !File.exist?('/sbin/init') || ((File.ftype('/sbin/init') == 'link') && File.readlink('/sbin/init').include?('systemd'))
end

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# File 'lib/distem/node/admin.rb', line 27

def self.init_node(pnode,properties)
  @@vifaces_max = properties['max_vifaces'].to_i if properties['max_vifaces']
  set_cgroups()
  set_pty()
  Lib::NetTools.set_resource(@@vifaces_max,properties['set_bridge'])
  Lib::CPUTools.set_resource(pnode.cpu)
  Lib::MemoryTools.set_resource(pnode.memory)
  Lib::FileSystemTools.set_resource()
end

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# File 'lib/distem/node/admin.rb', line 47

def self.quit_node()
  Lib::NetTools.unset_ifb()
  unset_cgroups()
  Lib::Shell.run("rm -R #{PATH_DISTEMTMP}") if File.exist?(PATH_DISTEMTMP)
end

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# File 'lib/distem/node/admin.rb', line 58

def self.set_cgroups
  if !has_systemd?
    Lib::Shell.run("mkdir #{PATH_SYSV_CGROUP}")
    Lib::Shell.run("mount -t cgroup cgroup #{PATH_SYSV_CGROUP}")
  end
end

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# File 'lib/distem/node/admin.rb', line 73

def self.set_pty(num=MAX_PTY)
  Lib::Shell.run("sysctl -w kernel.pty.max=#{num}")
end

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# File 'lib/distem/node/admin.rb', line 66

def self.unset_cgroups
  if !has_systemd?
    Lib::Shell.run("umount #{PATH_SYSV_CGROUP}")
    Lib::Shell.run("rmdir #{PATH_SYSV_CGROUP}")
  end
end

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# File 'lib/distem/node/admin.rb', line 42

def self.vifaces_max()
  return @@vifaces_max
end