virt-manager/libvirt: tunneled migration fails due to missing ssh

[bjornfor]

Describe the bug

Trying to migrate a VM in virt-manager fails with Unable to migrate guest: Cannot find 'ssh' in path: No such file or directory:

Steps To Reproduce

Steps to reproduce the behavior:

1. Create a VM in virt-manager.
2. Select Virtual Machine -> Migrate, chose Connectivity Mode Tunneled and click Migrate.
3. Witness error.

Screenshot below, here is the traceback:

Unable to migrate guest: Cannot find 'ssh' in path: No such file or directory

Traceback (most recent call last):
  File "/nix/store/3gzf8zw320sicv392rwxv8p9ifn7dh8q-virt-manager-4.1.0/share/virt-manager/virtManager/asyncjob.py", line 72, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/nix/store/3gzf8zw320sicv392rwxv8p9ifn7dh8q-virt-manager-4.1.0/share/virt-manager/virtManager/migrate.py", line 429, in _async_migrate
    vm.migrate(dstconn, migrate_uri, tunnel, unsafe, temporary, xml,
  File "/nix/store/3gzf8zw320sicv392rwxv8p9ifn7dh8q-virt-manager-4.1.0/share/virt-manager/virtManager/object/domain.py", line 1515, in migrate
    self._backend.migrateToURI3(dest_uri, params, flags)
  File "/nix/store/h5lb90r9aqmwp2cpfp5ay4fdgs6m090a-python3.10-libvirt-8.10.0/lib/python3.10/site-packages/libvirt.py", line 2168, in migrateToURI3
    raise libvirtError('virDomainMigrateToURI3() failed')
libvirt.libvirtError: Cannot find 'ssh' in path: No such file or directory

Expected behavior

ssh is in $PATH and migration succeeds.

Screenshots

Notify maintainers

Metadata

NixOS 22.11.