Class: Distem::Node::FileSystemForge

Inherits:
Forge
  • Object
show all
Defined in:
lib/distem/node/filesystemforge.rb

Overview

Allows to modify filesystem physical resources to fit with the virtual resources specifications

Constant Summary

PATH_DEFAULT_CONFIGFILE =

The directory to save container configuration files

"/tmp/distem/config/"
PATH_DEFAULT_ROOTFS_UNIQUE =

The directory used to save virtual nodes unique filesystem directories&files

"/tmp/distem/rootfs-unique/"
PATH_DEFAULT_ROOTFS_SHARED =

The directory used to save virtual nodes unique filesystem directories&files

"/tmp/distem/rootfs-shared/"

Instance Attribute Summary

Attributes inherited from Forge

#algorithm, #resource

Instance Method Summary (collapse)

Methods inherited from Forge

#undo

Constructor Details

- (FileSystemForge) initialize(vnode)

Create a new FileSystemForge specifying the virtual node resource to modify

Attributes

  • vnode The VNode object



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# File 'lib/distem/node/filesystemforge.rb', line 20

def initialize(vnode)
  super(vnode.filesystem,nil)

  unless File.exist?(PATH_DEFAULT_CONFIGFILE)
    Lib::Shell.run("mkdir -p #{PATH_DEFAULT_CONFIGFILE}")
  end

  rootfsfile = Lib::FileManager.download(@resource.image)
  uniquefspath = File.join(PATH_DEFAULT_ROOTFS_UNIQUE,@resource.vnode.name)

  block = Proc.new { |filepath,mode|
    Lib::Shell.run("rm -Rf #{filepath}") if File.exist?(filepath)
    Lib::Shell.run("mkdir #{(mode ? "-m #{mode}" : '')} -p #{filepath}")
  }

  block.call(File.join(uniquefspath,'proc'),755)
  block.call(File.join(uniquefspath,'sys'),755)
  block.call(File.join(uniquefspath,'dev','pts'),744)
  # Not necessary at the moment
  #block.call(File.join(uniquefspath,'dev','shm'),1777)
  #block.call(File.join(uniquefspath,'home','my'),755)

  if @resource.shared
    sharedfspath = File.join(PATH_DEFAULT_ROOTFS_SHARED,
      Lib::FileManager.file_hash(rootfsfile))
    sharedfspath = Lib::FileManager.extract(rootfsfile,sharedfspath,false,false)
    raise InvalidResourceError 'rootfs_image' unless sharedfspath

    @resource.sharedpath = sharedfspath
    @resource.path = uniquefspath
  else
    uniquefspath = Lib::FileManager.extract(rootfsfile,uniquefspath,true,vnode.filesystem.cow)
    raise InvalidResourceError 'rootfs_image' unless uniquefspath
    @resource.path = uniquefspath
  end
end

Instance Method Details

- (Object) apply

:nodoc:



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# File 'lib/distem/node/filesystemforge.rb', line 57

def apply() # :nodoc:
end