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Versions: 12
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Contents
require 'bosh/core/shell'
require 'bosh/stemcell/arch'
require 'tmpdir'
module Bosh::Stemcell
class DiskImage
attr_reader :image_mount_point
def initialize(options)
@image_file_path = options.fetch(:image_file_path)
@image_mount_point = options.fetch(:image_mount_point, Dir.mktmpdir)
@verbose = options.fetch(:verbose, false)
@shell = Bosh::Core::Shell.new
end
def mount
device_path = stemcell_loopback_device_name
mount_command = "sudo mount #{device_path} #{image_mount_point}"
shell.run(mount_command, output_command: verbose)
rescue => e
puts "Failed to mount with error #{e.inspect}"
raise e unless e.message.include?(mount_command)
sleep 0.5
shell.run(mount_command, output_command: verbose)
end
def unmount
shell.run("sudo umount #{image_mount_point}", output_command: verbose)
ensure
unmap_image
end
def while_mounted
mount
yield self
ensure
unmount
end
private
attr_reader :image_file_path, :verbose, :shell, :device
def stemcell_loopback_device_name
split_output = map_image.split(' ')
device_name = split_output[2]
File.join('/dev/mapper', device_name)
end
def map_image
@device = shell.run("sudo losetup --show --find #{image_file_path}", output_command: verbose)
if Bosh::Stemcell::Arch.ppc64le?
# power8 guest images have a p1: PReP partition and p2: file system, we need loopp2 here
shell.run("sudo kpartx -av #{device} | grep \"^add\" | grep \"p2 \"", output_command: verbose)
else
shell.run("sudo kpartx -av #{device}", output_command: verbose)
end
end
def unmap_image
shell.run("sudo kpartx -dv #{device}", output_command: verbose)
shell.run("sudo losetup -dv #{device}", output_command: verbose)
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems