vagrant-lxc-ng/lib/vagrant-lxc/driver.rb

163 lines
4.9 KiB
Ruby
Raw Normal View History

2013-03-02 23:36:06 +00:00
require "vagrant/util/retryable"
require "vagrant/util/subprocess"
2013-03-01 23:45:13 +00:00
2013-04-05 05:17:19 +00:00
require "vagrant-lxc/errors"
require "vagrant-lxc/driver/cli"
2013-03-01 03:34:51 +00:00
module Vagrant
module LXC
2013-04-05 05:17:19 +00:00
class Driver
# This is raised if the container can't be found when initializing it with
2013-03-10 03:39:05 +00:00
# a name.
2013-04-05 05:17:19 +00:00
class ContainerNotFound < StandardError; end
attr_reader :container_name,
:customizations
2013-04-06 01:28:41 +00:00
def initialize(container_name, cli = CLI.new(container_name))
@container_name = container_name
@cli = cli
@logger = Log4r::Logger.new("vagrant::provider::lxc::driver")
@customizations = []
2013-03-01 03:34:51 +00:00
end
def validate!
2013-04-06 01:28:41 +00:00
raise ContainerNotFound if @container_name && ! @cli.list.include?(@container_name)
end
def base_path
2013-04-06 01:28:41 +00:00
Pathname.new("#{CONTAINERS_PATH}/#{@container_name}")
end
def rootfs_path
Pathname.new(base_path.join('config').read.match(/^lxc\.rootfs\s+=\s+(.+)$/)[1])
end
def create(name, template_path, template_options = {})
2013-04-06 01:28:41 +00:00
@cli.name = @container_name = name
import_template(template_path) do |template_name|
@logger.debug "Creating container..."
@cli.create template_name, template_options
end
end
def share_folders(folders)
2013-03-04 01:42:18 +00:00
folders.each do |folder|
guestpath = rootfs_path.join(folder[:guestpath].gsub(/^\//, ''))
unless guestpath.directory?
begin
@logger.debug("Guest path doesn't exist, creating: #{guestpath}")
2013-03-04 01:42:18 +00:00
system "sudo mkdir -p #{guestpath.to_s}"
rescue Errno::EACCES
raise Vagrant::Errors::SharedFolderCreateFailed, :path => guestpath.to_s
2013-03-04 01:42:18 +00:00
end
end
@customizations << ['mount.entry', "#{folder[:hostpath]} #{guestpath} none bind 0 0"]
2013-03-04 01:42:18 +00:00
end
end
def start(customizations)
@logger.info('Starting container...')
if ENV['LXC_START_LOG_FILE']
2013-03-12 18:29:18 +00:00
extra = ['-o', ENV['LXC_START_LOG_FILE'], '-l', 'DEBUG']
end
customizations = customizations + @customizations
@cli.transition_to(:running) { |c| c.start(customizations, (extra || nil)) }
2013-03-01 03:34:51 +00:00
end
def halt
@logger.info('Shutting down container...')
# TODO: issue an lxc-stop if a timeout gets reached
@cli.transition_to(:stopped) { |c| c.shutdown }
2013-03-01 03:34:51 +00:00
end
def destroy
@cli.destroy
2013-03-01 23:45:13 +00:00
end
# TODO: This needs to be reviewed and specs needs to be written
def compress_rootfs
rootfs_dirname = File.dirname rootfs_path
basename = rootfs_path.to_s.gsub(/^#{Regexp.escape rootfs_dirname}\//, '')
# TODO: Pass in tmpdir so we can clean up from outside
target_path = "#{Dir.mktmpdir}/rootfs.tar.gz"
Dir.chdir base_path do
@logger.info "Compressing '#{rootfs_path}' rootfs to #{target_path}"
system "sudo rm -f rootfs.tar.gz && sudo tar --numeric-owner -czf #{target_path} #{basename}/*"
@logger.info "Changing rootfs tarbal owner"
system "sudo chown #{ENV['USER']}:#{ENV['USER']} #{target_path}"
end
target_path
end
def state
2013-04-06 01:28:41 +00:00
if @container_name
@cli.state
2013-03-01 03:34:51 +00:00
end
end
def assigned_ip
ip = ''
retryable(:on => LXC::Errors::ExecuteError, :tries => 10, :sleep => 3) do
unless ip = get_container_ip_from_ip_addr
# retry
raise LXC::Errors::ExecuteError, :command => "lxc-attach"
end
end
ip
end
# From: https://github.com/lxc/lxc/blob/staging/src/python-lxc/lxc/__init__.py#L371-L385
def get_container_ip_from_ip_addr
output = @cli.attach '/sbin/ip', '-4', 'addr', 'show', 'scope', 'global', 'eth0', namespaces: 'network'
if output =~ /^\s+inet ([0-9.]+)\/[0-9]+\s+/
return $1.to_s
end
end
protected
# Root folder where container configs are stored
CONTAINERS_PATH = '/var/lib/lxc'
def base_path
2013-04-06 01:28:41 +00:00
Pathname.new("#{CONTAINERS_PATH}/#{@container_name}")
end
def import_template(path)
2013-04-06 01:28:41 +00:00
template_name = "vagrant-tmp-#{@container_name}"
tmp_template_path = templates_path.join("lxc-#{template_name}").to_s
@logger.debug 'Copying LXC template into place'
system(%Q[sudo su root -c "cp #{path} #{tmp_template_path}"])
yield template_name
ensure
system(%Q[sudo su root -c "rm #{tmp_template_path}"])
end
TEMPLATES_PATH_LOOKUP = %w(
/usr/share/lxc/templates
/usr/lib/lxc/templates
)
def templates_path
return @templates_path if @templates_path
path = TEMPLATES_PATH_LOOKUP.find { |candidate| File.directory?(candidate) }
# TODO: Raise an user friendly error
raise 'Unable to identify lxc templates path!' unless path
@templates_path = Pathname(path)
end
2013-03-01 03:34:51 +00:00
end
end
end