[Hetzner] Initial deployment fails if no swap is configured

[edolstra]

Doing a Hetzner deployment with the follow config:

{
  deployment.targetEnv = "hetzner";
  deployment.hetzner.mainIPv4 = "46.4.66.184";
  deployment.hetzner.createSubAccount = false;
  deployment.hetzner.robotUser = "...";
  deployment.hetzner.robotPass = "...";

  deployment.hetzner.partitions = ''
    clearpart --all --initlabel --drives=nvme0n1,nvme1n1

    part raid.1 --grow --ondisk=nvme0n1
    part raid.2 --grow --ondisk=nvme1n1

    raid / --level=1 --device=md0 --fstype=ext4 --label=root raid.1 raid.2
  '';
}

fails with:

ceres........> installing machine...
ceres........> rebooting machine ‘ceres’ (46.4.66.184) into rescue system
ceres........> sending reboot command... Connection to 46.4.66.184 closed by remote host.
done.
ceres........> waiting for rescue system....[down]................................................[up]
ceres........> building Nix bootstrap installer... done. (/nix/store/mn0amqn0cds0l4krrd07y3ywambpzal5-hetzner-nixops-installer/bin/hetzner-bootstrap)
ceres........> creating nixbld group in rescue system... done.
ceres........> checking if tmpfs in rescue system is large enough... yes: 32142 MB
ceres........> copying bootstrap files to rescue system... done.
ceres........> partitioning disks... 
ceres........> Traceback (most recent call last):
ceres........>   File "/nix/store/x1vq5bkfvnn8gm8pl889y1b14glhl3qz-nixpart-0.4.1/bin/.nixpart-wrapped", line 166, in <module>
ceres........>     main()
ceres........>   File "/nix/store/x1vq5bkfvnn8gm8pl889y1b14glhl3qz-nixpart-0.4.1/bin/.nixpart-wrapped", line 152, in main
ceres........>     storage = ks.run(init=False)
ceres........>   File "/nix/store/x1vq5bkfvnn8gm8pl889y1b14glhl3qz-nixpart-0.4.1/lib/python2.7/site-packages/nixkickstart.py", line 1040, in run
ceres........>     self.partition()
ceres........>   File "/nix/store/x1vq5bkfvnn8gm8pl889y1b14glhl3qz-nixpart-0.4.1/lib/python2.7/site-packages/nixkickstart.py", line 990, in partition
ceres........>     errors, warnings = self.storage.sanityCheck()
ceres........>   File "/nix/store/sksb9401xv98b9g010j7m2kh1m33pfil-blivet-0.17-1/lib/python2.7/site-packages/blivet/__init__.py", line 1556, in sanityCheck
ceres........>     required = Size(spec="%s kb" % isys.EARLY_SWAP_RAM)
ceres........> AttributeError: 'NoneType' object has no attribute 'EARLY_SWAP_RAM'
Traceback (most recent call last):
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/bin/..nixops-wrapped-wrapped", line 991, in <module>
    args.op()
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/bin/..nixops-wrapped-wrapped", line 412, in op_deploy
    max_concurrent_activate=args.max_concurrent_activate)
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/lib/python2.7/site-packages/nixops/deployment.py", line 1063, in deploy
    self.run_with_notify('deploy', lambda: self._deploy(**kwargs))
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/lib/python2.7/site-packages/nixops/deployment.py", line 1052, in run_with_notify
    f()
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/lib/python2.7/site-packages/nixops/deployment.py", line 1063, in <lambda>
    self.run_with_notify('deploy', lambda: self._deploy(**kwargs))
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/lib/python2.7/site-packages/nixops/deployment.py", line 996, in _deploy
    nixops.parallel.run_tasks(nr_workers=-1, tasks=self.active_resources.itervalues(), worker_fun=worker)
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/lib/python2.7/site-packages/nixops/parallel.py", line 44, in thread_fun
    result_queue.put((worker_fun(t), None, t.name))
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/lib/python2.7/site-packages/nixops/deployment.py", line 969, in worker
    r.create(self.definitions[r.name], check=check, allow_reboot=allow_reboot, allow_recreate=allow_recreate)
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/lib/python2.7/site-packages/nixops/backends/hetzner.py", line 633, in create
    self.reboot_rescue(install=True, partitions=defn.partitions)
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/lib/python2.7/site-packages/nixops/backends/hetzner.py", line 366, in reboot_rescue
    self._bootstrap_rescue(install, partitions)
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/lib/python2.7/site-packages/nixops/backends/hetzner.py", line 287, in _bootstrap_rescue
    stdin_string=partitions)
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/lib/python2.7/site-packages/nixops/backends/__init__.py", line 337, in run_command
    return self.ssh.run_command(command, self.get_ssh_flags(), **kwargs)
  File "/nix/store/fhhrm6nm71risrkp383nzdx1zviycfq6-nixops-1.7/lib/python2.7/site-packages/nixops/ssh_util.py", line 291, in run_command
    raise SSHCommandFailed(exc.message, exc.exitcode)
nixops.ssh_util.SSHCommandFailed: command ‘['ssh', '-oControlPath=/tmp/nixops-ssh-tmp6CR2Q2/master-socket', '-p', '22', '-o', 'LogLevel=quiet', '-o', 'UserKnownHostsFile=/dev/null', '-o', 'GlobalKnownHostsFile=/dev/null', '-o', 'StrictHostKeyChecking=accept-new', '-p', '22', '-o', 'LogLevel=quiet', '-o', 'UserKnownHostsFile=/dev/null', '-o', 'GlobalKnownHostsFile=/dev/null', '-o', 'StrictHostKeyChecking=accept-new', '-x', '[email protected]', '--', 'export LANG= LC_ALL= LC_TIME=; nixpart -p -']’ failed on machine ‘ceres’ (exit code 1)