Class: OsCtld::SendReceive::Commands::ReceiveSkel

Inherits:
Base show all
Includes:
OsCtl::Lib::Utils::Log, OsCtl::Lib::Utils::System
Defined in:
lib/osctld/send_receive/commands/receive_skel.rb

Instance Attribute Summary

Attributes inherited from Commands::Base

#client, #client_handler, #id, #opts

Instance Method Summary collapse

Methods inherited from Base

handle

Methods inherited from Commands::Base

#base_execute, #call_cmd, #call_cmd!, 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

#executeObject



12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
# File 'lib/osctld/send_receive/commands/receive_skel.rb', line 12

def execute
  client.send({status: true, response: 'continue'}.to_json + "\n", 0)

  io = client.recv_io
  f = Tempfile.open('ct-skel')
  f.write(io.readpartial(16*1024)) until io.eof?

  f.seek(0)

  # sshd will use the first key that matches to accept the client. However,
  # one key can be authorized multiple times, either on different pools,
  # or even within the same pool, but with a different passphrase. We must
  # therefore find the matching key and target pool.
  pool, auth_key = find_pool_and_key

  error!('the pool is disabled') unless pool.active?

  importer = Container::Importer.new(pool, f)
  data = importer.
  token = nil

  if data['type'] != 'skel'
    error!("expected archive type to be 'skel', got '#{data['type']}'")
  end

  ct = importer.load_ct(ct_opts: {staged: true, devices: false})

  if auth_key.ctid && !File.fnmatch?(auth_key.ctid, ct.id)
    error!('access denied: invalid container id')
  end

  ct.manipulate(self) do
    builder = Container::Builder.new(ct.get_run_conf)

    unless builder.valid?
      error!("invalid id, allowed format: #{builder.id_chars}")
    end

    begin
      ct.devices.check_all_available!

    rescue DeviceNotAvailable, DeviceModeInsufficient => e
      error!(e.message)
    end

    unless builder.register
      error!("container #{pool.name}:#{ct.id} already exists")
    end

    ct.devices.init

    importer.create_datasets(builder)

    # Unmount all datasets before transfers
    ct.datasets.reverse.each { |ds| zfs(:umount, '', ds.name, valid_rcs: [1]) }

    builder.setup_lxc_home

    SendReceive.started_using_key(pool, auth_key.name)
    token = SendReceive::Tokens.get
    ct.open_send_log(
      :destination,
      token,
      key_name: auth_key.name,
    )

    builder.setup_lxc_configs
    builder.setup_log_file
    builder.setup_user_hook_script_dir
    importer.install_user_hook_scripts(ct)
    builder.monitor

    if ct.netifs.any?
      call_cmd(Commands::User::LxcUsernet)
    end
  end

  # Pass the token to the sender
  ok(token)

ensure
  f.close
  f.unlink
end

#find_pool_and_keyObject (protected)



98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
# File 'lib/osctld/send_receive/commands/receive_skel.rb', line 98

def find_pool_and_key
  key_pool = DB::Pools.find(opts[:key_pool])
  error!('pool not found') unless key_pool

  auth_key = key_pool.send_receive_key_chain.get_key(opts[:key_name])
  error!('invalid authentication key') unless auth_key

  log(:info, "Authenticated using key #{key_pool.name}:#{auth_key.name}")

  to_pool = DB::Pools.find(opts[:pool] || opts[:key_pool])
  error!('pool not found') unless to_pool

  ptr = get_ptr(opts[:client_ip])
  log(:info, "Client IP #{opts[:client_ip]}, PTR #{ptr || 'not found'}")

  actual_key = to_pool.send_receive_key_chain.find_key(
    auth_key.pubkey,
    [opts[:client_ip], ptr].compact,
    opts[:passphrase],
  )
  error!('invalid authentication key') unless actual_key

  log(:info, "Found matching key #{to_pool.name}:#{actual_key.name}")

  if actual_key.single_use? && actual_key.in_use?
    log(:info, 'Key already in use')
    error!('invalid authentication key')
  end

  [to_pool, actual_key]
end

#get_ptr(addr) ⇒ Object (protected)



130
131
132
133
134
# File 'lib/osctld/send_receive/commands/receive_skel.rb', line 130

def get_ptr(addr)
  Resolv.getname(addr)
rescue Resolv::ResolvError
  nil
end