Class: VpsAdminOS::Converter::Vz6::Migrator::Zfs

Inherits:
Base
  • Object
show all
Defined in:
lib/vpsadminos-converter/vz6/migrator/zfs.rb

Instance Attribute Summary

Attributes inherited from Base

#progress_handler, #state

Instance Method Summary collapse

Methods inherited from Base

#cancel_remote, #export_skel, #initialize, #progress, #stage, #transfer_container

Constructor Details

This class inherits a constructor from VpsAdminOS::Converter::Vz6::Migrator::Base

Instance Method Details

#cancel(cmd_opts) ⇒ Object 



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# File 'lib/vpsadminos-converter/vz6/migrator/zfs.rb', line 65

def cancel(cmd_opts)
  cancel_remote(cmd_opts[:force])
  state.destroy
end

#cleanup(cmd_opts) ⇒ Object 



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# File 'lib/vpsadminos-converter/vz6/migrator/zfs.rb', line 50

def cleanup(cmd_opts)
  target_ct.datasets.each do |ds|
    state.snapshots.each do |snap|
      zfs(:destroy, nil, "#{ds}@#{snap}")
    end
  end

  if cmd_opts[:delete]
    syscmd("vzctl destroy #{vz_ct.ctid}")
    zfs(:destroy, '-r', target_ct.dataset)
  end

  state.destroy
end

#send_dataset(ct, ds, base_snap) ⇒ Object (protected) 



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# File 'lib/vpsadminos-converter/vz6/migrator/zfs.rb', line 72

def send_dataset(ct, ds, base_snap)
  progress(:step, "Syncing #{ds.relative_name}")

  snaps = ds.snapshots
  send_snapshot(ct, ds, base_snap, snaps.first.snapshot)
  return unless snaps.count > 1

  send_snapshot(
    ct,
    ds,
    base_snap,
    snaps.last.snapshot,
    snaps.first.snapshot
  )
end

#send_dataset_incr(ct, ds, incr_snap, from_snap) ⇒ Object (protected) 



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# File 'lib/vpsadminos-converter/vz6/migrator/zfs.rb', line 88

def send_dataset_incr(ct, ds, incr_snap, from_snap)
  progress(:step, "Syncing #{ds.relative_name}")
  send_snapshot(ct, ds, incr_snap, incr_snap, from_snap)
end

#send_snapshot(ct, ds, base_snap, snap, from_snap = nil) ⇒ Object (protected) 



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# File 'lib/vpsadminos-converter/vz6/migrator/zfs.rb', line 93

def send_snapshot(ct, ds, base_snap, snap, from_snap = nil)
  stream = OsCtl::Lib::Zfs::Stream.new(
    ds,
    snap,
    from_snap,
    compressed: opts[:zfs_compressed_send]
  )
  stream.progress do |total, _transfered, _changed|
    progress(:transfer, [stream.size, total])
  end

  r, send = stream.spawn
  pid = Process.spawn(
    *migrate_ssh_cmd(
      nil,
      opts,
      [
        'receive', from_snap ? 'incremental' : 'base',
        ct.id, ds.relative_name
      ] + (base_snap == snap ? [base_snap] : [])
    ),
    in: r
  )
  r.close
  stream.monitor(send)

  _, status = Process.wait2(pid)

  raise 'sync failed' if status.exitstatus != 0
end

#sync(&block) ⇒ Object 



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# File 'lib/vpsadminos-converter/vz6/migrator/zfs.rb', line 5

def sync(&block)
  self.progress_handler = block

  if opts[:zfs_subdir] != 'private'
    raise 'only zfs-subdir=private is implemented'
  end

  snap = "converter-migrate-base-#{Time.now.to_i}"
  zfs(:snapshot, '-r', "#{state.target_ct.dataset}@#{snap}")

  state.set_step(:sync)
  state.snapshots << snap
  state.save

  state.target_ct.datasets.each do |ds|
    send_dataset(state.target_ct, ds, snap)
  end
end

#transfer(&block) ⇒ Object 



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# File 'lib/vpsadminos-converter/vz6/migrator/zfs.rb', line 24

def transfer(&block)
  self.progress_handler = block

  if opts[:zfs_subdir] != 'private'
    raise 'only zfs-subdir=private is implemented'
  end

  # Stop the container
  running = vz_ct.running?
  syscmd("vzctl stop #{vz_ct.ctid}")

  # Final sync
  snap = "converter-migrate-incr-#{Time.now.to_i}"
  zfs(:snapshot, '-r', "#{target_ct.dataset}@#{snap}")

  state.snapshots << snap
  state.save

  state.target_ct.datasets.each do |ds|
    send_dataset_incr(target_ct, ds, snap, state.snapshots[-2])
  end

  # Transfer to dst
  transfer_container(running)
end