Class: OsCtld::Commands::Container::Reinstall

Inherits:
Logged
  • Object
show all
Includes:
OsCtl::Lib::Utils::Log, OsCtl::Lib::Utils::System, Utils::Container
Defined in:
lib/osctld/commands/container/reinstall.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/reinstall.rb', line 16

def execute(ct)
  fh = nil

  manipulate(ct) do
    error!('container is running') if ct.running?

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

      # Remove all snapshots
      snaps = snapshots(ct)

      if snaps.any? && !opts[:remove_snapshots]
        error!("the dataset has snapshots:\n  #{snaps.join("\n  ")}")
      end

      snaps.each { |snap| zfs(:destroy, nil, snap) }

      # Unmount all datasets
      ct.dataset.unmount(recursive: true)

      # Create a new rootfs dataset with temporary name
      props = OsCtl::Lib::Zfs::PropertyState.new
      props.read_from(ct.dataset)

      new_ds = OsCtl::Lib::Zfs::Dataset.new("#{ct.dataset}.reinstall")
      new_ds.create!(properties: props.options)

      # Move subdatasets to the new dataset
      ct.dataset.children.each do |ds|
        new_subds = File.join(new_ds.name, ds.relative_name)
        zfs(:rename, nil, "#{ds} #{new_subds}")
      end

      # Destroy the original rootfs dataset
      TrashBin.add_dataset(ct.pool, ct.dataset)

      # Replace the original dataset with the new one
      zfs(:rename, nil, "#{new_ds} #{ct.dataset}")

      # Apply new 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
      importer.import_root_dataset(builder)

      # Update image-specific config
      ct.patch_config(importer.get_container_config)

      # Remount all datasets
      ct.dataset.mount(recursive: true)

      builder.setup_ct_dir
      builder.setup_rootfs
    end

    ok
  end
ensure
  fh && fh.close
end

#find ⇒ Object 



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# File 'lib/osctld/commands/container/reinstall.rb', line 11

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

#snapshots(ct) ⇒ Object (protected) 



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# File 'lib/osctld/commands/container/reinstall.rb', line 89

def snapshots(ct)
  zfs(:list, '-H -r -d 1 -o name -t snapshot', ct.dataset).output.split("\n")
end