141 lines
4.2 KiB
Ruby
141 lines
4.2 KiB
Ruby
require 'securerandom'
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require "vagrant-lxc/errors"
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require "vagrant-lxc/container/cli"
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require "vagrant/util/retryable"
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require "vagrant/util/subprocess"
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module Vagrant
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module LXC
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class Container
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# Root folder where containers are stored
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CONTAINERS_PATH = '/var/lib/lxc'
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# Include this so we can use `Subprocess` more easily.
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include Vagrant::Util::Retryable
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# This is raised if the container can't be found when initializing it with
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# a name.
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class NotFound < StandardError; end
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attr_reader :name
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def initialize(name, cli = CLI.new(name))
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@name = name
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@cli = cli
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@logger = Log4r::Logger.new("vagrant::provider::lxc::container")
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end
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def validate!
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raise NotFound if @name && ! @cli.list.include?(@name)
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end
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def base_path
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Pathname.new("#{CONTAINERS_PATH}/#{@name}")
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end
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def rootfs_path
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Pathname.new(base_path.join('config').read.match(/^lxc\.rootfs\s+=\s+(.+)$/)[1])
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end
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def create(base_name, target_rootfs_path, metadata = {})
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@logger.debug('Creating container using lxc-create...')
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@name = "#{base_name}-#{SecureRandom.hex(6)}"
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public_key = Vagrant.source_root.join('keys', 'vagrant.pub').expand_path.to_s
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meta_opts = metadata.fetch('template-opts', {}).merge(
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'--auth-key' => public_key,
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'--cache' => metadata.fetch('rootfs-cache-path')
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)
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@cli.name = @name
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@cli.create(metadata.fetch('template-name'), target_rootfs_path, meta_opts)
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@name
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end
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def share_folders(folders, config)
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folders.each do |folder|
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guestpath = rootfs_path.join(folder[:guestpath].gsub(/^\//, ''))
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unless guestpath.directory?
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begin
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system "sudo mkdir -p #{guestpath.to_s}"
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rescue Errno::EACCES
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raise Vagrant::Errors::SharedFolderCreateFailed,
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:path => guestpath.to_s
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end
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end
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config.start_opts << "lxc.mount.entry=#{folder[:hostpath]} #{guestpath} none bind 0 0"
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end
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end
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def start(config)
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@logger.info('Starting container...')
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opts = config.start_opts.dup
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if ENV['LXC_START_LOG_FILE']
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extra = ['-o', ENV['LXC_START_LOG_FILE'], '-l', 'DEBUG']
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end
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@cli.transition_to(:running) { |c| c.start(opts, (extra || nil)) }
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end
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def halt
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@logger.info('Shutting down container...')
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# TODO: issue an lxc-stop if a timeout gets reached
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@cli.transition_to(:stopped) { |c| c.shutdown }
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end
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def destroy
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@cli.destroy
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end
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# TODO: This needs to be reviewed and specs needs to be written
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def compress_rootfs
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# TODO: Our template should not depend on container's arch
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arch = base_path.join('config').read.match(/^lxc\.arch\s+=\s+(.+)$/)[1]
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rootfs_dirname = File.dirname rootfs_path
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basename = rootfs_path.to_s.gsub(/^#{Regexp.escape rootfs_dirname}\//, '')
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# TODO: Pass in tmpdir so we can clean up from outside
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target_path = "#{Dir.mktmpdir}/rootfs.tar.gz"
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Dir.chdir base_path do
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@logger.info "Compressing '#{rootfs_path}' rootfs to #{target_path}"
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system "sudo rm -f rootfs.tar.gz && sudo bsdtar -s /#{basename}/rootfs-#{arch}/ --numeric-owner -czf #{target_path} #{basename}/* 2>/dev/null"
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@logger.info "Changing rootfs tarbal owner"
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system "sudo chown #{ENV['USER']}:#{ENV['USER']} #{target_path}"
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end
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target_path
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end
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def state
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if @name
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@cli.state
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end
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end
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def assigned_ip
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ip = ''
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retryable(:on => LXC::Errors::ExecuteError, :tries => 10, :sleep => 3) do
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unless ip = get_container_ip_from_ifconfig
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# retry
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raise LXC::Errors::ExecuteError, :command => "lxc-attach"
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end
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end
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ip
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end
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def get_container_ip_from_ifconfig
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output = @cli.attach '/sbin/ifconfig', '-v', 'eth0', namespaces: 'network'
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if output =~ /\s+inet addr:([0-9.]+)\s+/
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return $1.to_s
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end
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end
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end
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end
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end
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