53 lines
2 KiB
Ruby
53 lines
2 KiB
Ruby
module Vagrant
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module LXC
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module Action
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# Prepare arguments to be used for lxc-create
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class HandleBoxMetadata < BaseAction
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LXC_TEMPLATES_PATH = Pathname.new("/usr/share/lxc/templates")
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TEMP_PREFIX = "vagrant-lxc-rootfs-temp-"
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def initialize(app, env)
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super
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@logger = Log4r::Logger.new("vagrant::lxc::action::handle_box_metadata")
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end
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def call(env)
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# We _could_ extract the rootfs to a folder under ~/.vagrant.d/boxes
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# but it would open up for a few issues:
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# * The rootfs owner is the root user, so we'd need to prepend "sudo" to
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# `vagrant box remove`
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# * We'd waste a lot of disk space: a compressed Ubuntu rootfs fits 80mb,
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# extracted it takes 262mb
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# * If something goes wrong during the Container creation process and
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# somehow we don't handle, writing to /tmp means that things will get
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# flushed on next reboot
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rootfs_cache = Dir.mktmpdir(TEMP_PREFIX)
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box = env[:machine].box
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template_name = "vagrant-#{box.name}"
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# Prepends "lxc-" to the template file so that `lxc-create` is able to find it
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lxc_template_src = box.directory.join('lxc-template').to_s
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unless File.exists?(lxc_template_src)
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raise Errors::TemplateFileMissing.new name: box.name
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end
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dest = LXC_TEMPLATES_PATH.join("lxc-#{template_name}").to_s
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@logger.debug('Copying LXC template into place')
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system(%Q[sudo su root -c "cp #{lxc_template_src} #{dest}"])
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@logger.debug('Extracting rootfs')
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system(%Q[sudo su root -c "cd #{box.directory} && tar xfz rootfs.tar.gz -C #{rootfs_cache}"])
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box.metadata.merge!(
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'template-name' => template_name,
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'rootfs-cache-path' => rootfs_cache
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)
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@app.call(env)
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ensure
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system %Q[sudo su root -c "rm -rf #{rootfs_cache}"]
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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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