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# This file is part of cloud-init. See LICENSE file for license information.
from cloudinit.config import cc_set_hostname
from cloudinit import cloud
from cloudinit import distros
from cloudinit import helpers
from cloudinit import util
from cloudinit.tests import helpers as t_help
from configobj import ConfigObj
import logging
import os
import shutil
import tempfile
from io import BytesIO
from unittest import mock
LOG = logging.getLogger(__name__)
class TestHostname(t_help.FilesystemMockingTestCase):
with_logs = True
def setUp(self):
super(TestHostname, self).setUp()
self.tmp = tempfile.mkdtemp()
util.ensure_dir(os.path.join(self.tmp, 'data'))
self.addCleanup(shutil.rmtree, self.tmp)
def _fetch_distro(self, kind, conf=None):
cls = distros.fetch(kind)
paths = helpers.Paths({'cloud_dir': self.tmp})
conf = {} if conf is None else conf
return cls(kind, conf, paths)
def test_debian_write_hostname_prefer_fqdn(self):
cfg = {
'hostname': 'blah',
'prefer_fqdn_over_hostname': True,
'fqdn': 'blah.yahoo.com',
}
distro = self._fetch_distro('debian', cfg)
paths = helpers.Paths({'cloud_dir': self.tmp})
ds = None
cc = cloud.Cloud(ds, paths, {}, distro, None)
self.patchUtils(self.tmp)
cc_set_hostname.handle('cc_set_hostname',
cfg, cc, LOG, [])
contents = util.load_file("/etc/hostname")
self.assertEqual('blah.yahoo.com', contents.strip())
@mock.patch('cloudinit.distros.Distro.uses_systemd', return_value=False)
def test_rhel_write_hostname_prefer_hostname(self, m_uses_systemd):
cfg = {
'hostname': 'blah',
'prefer_fqdn_over_hostname': False,
'fqdn': 'blah.yahoo.com',
}
distro = self._fetch_distro('rhel', cfg)
paths = helpers.Paths({'cloud_dir': self.tmp})
ds = None
cc = cloud.Cloud(ds, paths, {}, distro, None)
self.patchUtils(self.tmp)
cc_set_hostname.handle('cc_set_hostname',
cfg, cc, LOG, [])
contents = util.load_file("/etc/sysconfig/network", decode=False)
n_cfg = ConfigObj(BytesIO(contents))
self.assertEqual(
{'HOSTNAME': 'blah'},
dict(n_cfg))
@mock.patch('cloudinit.distros.Distro.uses_systemd', return_value=False)
def test_write_hostname_rhel(self, m_uses_systemd):
cfg = {
'hostname': 'blah',
'fqdn': 'blah.blah.blah.yahoo.com'
}
distro = self._fetch_distro('rhel')
paths = helpers.Paths({'cloud_dir': self.tmp})
ds = None
cc = cloud.Cloud(ds, paths, {}, distro, None)
self.patchUtils(self.tmp)
cc_set_hostname.handle('cc_set_hostname',
cfg, cc, LOG, [])
contents = util.load_file("/etc/sysconfig/network", decode=False)
n_cfg = ConfigObj(BytesIO(contents))
self.assertEqual(
{'HOSTNAME': 'blah.blah.blah.yahoo.com'},
dict(n_cfg))
def test_write_hostname_debian(self):
cfg = {
'hostname': 'blah',
'fqdn': 'blah.blah.blah.yahoo.com',
}
distro = self._fetch_distro('debian')
paths = helpers.Paths({'cloud_dir': self.tmp})
ds = None
cc = cloud.Cloud(ds, paths, {}, distro, None)
self.patchUtils(self.tmp)
cc_set_hostname.handle('cc_set_hostname',
cfg, cc, LOG, [])
contents = util.load_file("/etc/hostname")
self.assertEqual('blah', contents.strip())
@mock.patch('cloudinit.distros.Distro.uses_systemd', return_value=False)
def test_write_hostname_sles(self, m_uses_systemd):
cfg = {
'hostname': 'blah.blah.blah.suse.com',
}
distro = self._fetch_distro('sles')
paths = helpers.Paths({'cloud_dir': self.tmp})
ds = None
cc = cloud.Cloud(ds, paths, {}, distro, None)
self.patchUtils(self.tmp)
cc_set_hostname.handle('cc_set_hostname', cfg, cc, LOG, [])
contents = util.load_file(distro.hostname_conf_fn)
self.assertEqual('blah', contents.strip())
@mock.patch('cloudinit.distros.Distro.uses_systemd', return_value=False)
def test_photon_hostname(self, m_uses_systemd):
cfg1 = {
'hostname': 'photon',
'prefer_fqdn_over_hostname': True,
'fqdn': 'test1.vmware.com',
}
cfg2 = {
'hostname': 'photon',
'prefer_fqdn_over_hostname': False,
'fqdn': 'test2.vmware.com',
}
ds = None
distro = self._fetch_distro('photon', cfg1)
paths = helpers.Paths({'cloud_dir': self.tmp})
cc = cloud.Cloud(ds, paths, {}, distro, None)
self.patchUtils(self.tmp)
for c in [cfg1, cfg2]:
cc_set_hostname.handle('cc_set_hostname', c, cc, LOG, [])
contents = util.load_file(distro.hostname_conf_fn, decode=True)
if c['prefer_fqdn_over_hostname']:
self.assertEqual(contents.strip(), c['fqdn'])
else:
self.assertEqual(contents.strip(), c['hostname'])
def test_multiple_calls_skips_unchanged_hostname(self):
"""Only new hostname or fqdn values will generate a hostname call."""
distro = self._fetch_distro('debian')
paths = helpers.Paths({'cloud_dir': self.tmp})
ds = None
cc = cloud.Cloud(ds, paths, {}, distro, None)
self.patchUtils(self.tmp)
cc_set_hostname.handle(
'cc_set_hostname', {'hostname': 'hostname1.me.com'}, cc, LOG, [])
contents = util.load_file("/etc/hostname")
self.assertEqual('hostname1', contents.strip())
cc_set_hostname.handle(
'cc_set_hostname', {'hostname': 'hostname1.me.com'}, cc, LOG, [])
self.assertIn(
'DEBUG: No hostname changes. Skipping set-hostname\n',
self.logs.getvalue())
cc_set_hostname.handle(
'cc_set_hostname', {'hostname': 'hostname2.me.com'}, cc, LOG, [])
contents = util.load_file("/etc/hostname")
self.assertEqual('hostname2', contents.strip())
self.assertIn(
'Non-persistently setting the system hostname to hostname2',
self.logs.getvalue())
def test_error_on_distro_set_hostname_errors(self):
"""Raise SetHostnameError on exceptions from distro.set_hostname."""
distro = self._fetch_distro('debian')
def set_hostname_error(hostname, fqdn):
raise Exception("OOPS on: %s" % fqdn)
distro.set_hostname = set_hostname_error
paths = helpers.Paths({'cloud_dir': self.tmp})
ds = None
cc = cloud.Cloud(ds, paths, {}, distro, None)
self.patchUtils(self.tmp)
with self.assertRaises(cc_set_hostname.SetHostnameError) as ctx_mgr:
cc_set_hostname.handle(
'somename', {'hostname': 'hostname1.me.com'}, cc, LOG, [])
self.assertEqual(
'Failed to set the hostname to hostname1.me.com (hostname1):'
' OOPS on: hostname1.me.com',
str(ctx_mgr.exception))
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