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 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/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,
        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

    # Prepare the image
    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

    # 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_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

  # 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 127

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