63 lines
2.2 KiB
Python
63 lines
2.2 KiB
Python
# Copyright 2015 Cloudbase Solutions Srl
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import platform
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import re
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from oslo_log import log as oslo_logging
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from cloudbaseinit import conf as cloudbaseinit_conf
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CONF = cloudbaseinit_conf.CONF
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LOG = oslo_logging.getLogger(__name__)
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NETBIOS_HOST_NAME_MAX_LEN = 15
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def set_hostname(osutils, hostname):
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"""Change the hostname for the underlying platform.
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If netbios_host_name_compatibility is set to True in the configuration
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file, then the hostname is truncated to NETBIOS_HOST_NAME_MAX_LEN.
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Params:
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osutils: instance of osutils
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hostname: the desired hostname
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Returns:
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(new_hostname, reboot_required)
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new_hostname: the possibly truncated hostname
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reboot_required: True if the hostname was changed and a reboot is
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required, False otherwise.
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"""
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hostname = hostname.split('.', 1)[0]
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if (len(hostname) > NETBIOS_HOST_NAME_MAX_LEN and
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CONF.netbios_host_name_compatibility):
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LOG.warn('Truncating host name for Netbios compatibility. '
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'Old name: %(old_hostname)s, new name: '
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'%(new_hostname)s' %
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{'old_hostname': hostname,
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'new_hostname': hostname[:NETBIOS_HOST_NAME_MAX_LEN]})
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hostname = hostname[:NETBIOS_HOST_NAME_MAX_LEN]
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hostname = re.sub(r'-$', '0', hostname)
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if platform.node().lower() == hostname.lower():
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LOG.debug("Hostname already set to: %s" % hostname)
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reboot_required = False
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else:
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LOG.info("Setting hostname: %s" % hostname)
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reboot_required = osutils.set_host_name(hostname)
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return hostname, reboot_required
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