Class: OsCtld::Commands::Container::Boot

Inherits:
Logged
  • Object
show all
Includes:
OsCtl::Lib::Utils::Log, OsCtl::Lib::Utils::System, Utils::Container
Defined in:
lib/osctld/commands/container/boot.rb

Instance Method Summary collapse

Methods included from Utils::Container

#format_unavailable_repositories, #get_image_path, #get_image_path!, #get_repositories, #image_not_found_message, #image_spec, #image_unavailable_message, #remove_accounting_cgroups, #with_image_path, #with_repository_image_path!

Methods inherited from Logged

#base_execute

Instance Method Details

#execute(ct) ⇒ Object 



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# File 'lib/osctld/commands/container/boot.rb', line 17

def execute(ct)
  fh = nil
  root_mnt = nil

  manipulate(ct) do
    error!('container is running') if ct.running? && !opts[:force]

    # Check rootfs mount
    if opts[:mount_root]
      # Ensure the rootfs is mounted
      ct.mount(force: true)

      root_mnt = Mount::Entry.new(
        ct.rootfs,
        opts[:mount_root],
        'bind',
        'bind,rw,create=dir',
        false,
        map_ids: true,
        temp: true,
        in_config: true
      )

      mnt_at = ct.mounts.find_at(opts[:mount_root])

      if mnt_at && !mnt_at.temp
        error!("unable to mount rootfs at '#{opts[:mount_root]}': the path " \
               'is already mounted')
      end
    end

    tpl = opts[:image]
    if opts[:type] == 'remote'
      tpl[:distribution] ||= ct.distribution
      tpl[:version] ||= ct.version
      tpl[:arch] ||= ct.arch
      tpl[:vendor] ||= ct.vendor
      tpl[:variant] ||= ct.variant
    end

    with_image_path(ct.pool, type: opts[:type], path: opts[:path], image: tpl) do |tpl_path|
      # Prepare a new, temporary dataset
      tmp_name = "#{ct.dataset}.boot-#{SecureRandom.hex(3)}"
      tmp_ds = OsCtl::Lib::Zfs::Dataset.new(
        tmp_name,
        base: tmp_name
      )
      tmp_ds.create!(properties: {
        canmount: 'noauto'
      }.merge(opts[:zfs_properties] || {}))

      ctrc = ct.new_run_conf
      builder = Container::Builder.new(ctrc, cmd: self)

      # Open the image
      fh = File.open(tpl_path, 'r')
      importer = Container::Importer.new(ct.pool, fh, ct_id: ct.id, image_file: tpl_path)
      importer.load_metadata

      # Reconfigure the container for boot
      ct_cfg = importer.get_container_config

      ctrc.boot_from(
        dataset: tmp_ds,
        distribution: ct_cfg['distribution'] || ct.distribution,
        version: ct_cfg['version'] || ct.version,
        arch: ct_cfg['arch'] || ct.arch,
        vendor: ct_cfg['vendor'] || ct.vendor,
        variant: ct_cfg['variant'] || ct.variant,
        destroy_dataset_on_stop: true
      )

      # Apply the image
      importer.import_root_dataset(builder)

      builder.shift_or_mount_dataset
      builder.setup_ct_dir
      builder.setup_rootfs

      # Ensure the container is stopped
      call_cmd!(
        Commands::Container::Stop,
        pool: ct.pool.name,
        id: ct.id
      )

      # Apply run configuration
      ct.set_next_run_conf(ctrc)
      GarbageCollector.add_container_run_dataset(ctrc, tmp_ds)

      # Boot it
      start_ct(ct, root_mnt) unless opts[:queue]
    end
  end

  # When starting as queued, we can't be holding the manipulation lock
  start_ct(ct, root_mnt) if opts[:queue]
  ok
ensure
  fh && fh.close
end

#find ⇒ Object 



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# File 'lib/osctld/commands/container/boot.rb', line 12

def find
  ct = DB::Containers.find(opts[:id], opts[:pool])
  ct || error!('container not found')
end

#start_ct(ct, root_mnt) ⇒ Object (protected) 



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# File 'lib/osctld/commands/container/boot.rb', line 121

def start_ct(ct, root_mnt)
  call_cmd!(
    Commands::Container::Start,
    pool: ct.pool.name,
    id: ct.id,
    wait: opts[:wait],
    queue: opts[:queue],
    priority: opts[:priority],
    debug: opts[:debug],
    mounts: [root_mnt].compact,
    custom_boot: true
  )
end