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 Attribute Summary

Attributes inherited from Base

#client, #client_handler, #id, #opts

Instance Method Summary collapse

Methods included from Utils::Container

#get_image_path, #get_repositories, #remove_accounting_cgroups

Methods inherited from Logged

#base_execute

Methods inherited from Base

#base_execute, #call_cmd, #call_cmd!, #error, #error!, handle, #handled, #indirect?, #initialize, #manipulate, #manipulation_holder, #ok, #progress, #request_stop, run, run!

Constructor Details

This class inherits a constructor from OsCtld::Commands::Base

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?

    if opts[:type] == 'image'
      tpl_path = opts[:path]
    elsif opts[:type] == 'remote'
      progress('Fetching image')

      tpl = opts[:image]
      tpl[:distribution] ||= ct.distribution
      tpl[:version] ||= ct.version
      tpl[:arch] ||= ct.arch
      tpl[:vendor] ||= 'default'
      tpl[:variant] ||= 'default'

      tpl_path = get_image_path(get_repositories(ct.pool), tpl)
      error!('image not found in searched repositories') if tpl_path.nil?
    else
      error!('invalid type')
    end

    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

    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 96

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