116 lines
3.1 KiB
Python
116 lines
3.1 KiB
Python
# Copyright (C) 2013 Craig Tracey
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# Copyright (C) 2013 Hewlett-Packard Development Company, L.P.
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#
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# Author: Craig Tracey <craigtracey@gmail.com>
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# Author: Juerg Haefliger <juerg.haefliger@hp.com>
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#
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# This file is part of cloud-init. See LICENSE file for license information.
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"""Resolv Conf: configure resolv.conf"""
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import logging
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from cloudinit import templater, util
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from cloudinit.cloud import Cloud
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from cloudinit.config import Config
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from cloudinit.config.schema import MetaSchema
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from cloudinit.settings import PER_INSTANCE
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LOG = logging.getLogger(__name__)
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RESOLVE_CONFIG_TEMPLATE_MAP = {
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"/etc/resolv.conf": "resolv.conf",
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"/etc/systemd/resolved.conf": "systemd.resolved.conf",
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}
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meta: MetaSchema = {
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"id": "cc_resolv_conf",
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"distros": [
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"alpine",
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"azurelinux",
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"fedora",
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"mariner",
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"opensuse",
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"opensuse-leap",
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"opensuse-microos",
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"opensuse-tumbleweed",
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"photon",
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"rhel",
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"sle_hpc",
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"sle-micro",
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"sles",
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"openeuler",
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],
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"frequency": PER_INSTANCE,
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"activate_by_schema_keys": ["manage_resolv_conf"],
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}
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def generate_resolv_conf(template_fn, params, target_fname):
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flags = []
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false_flags = []
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if "options" in params:
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for key, val in params["options"].items():
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if isinstance(val, bool):
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if val:
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flags.append(key)
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else:
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false_flags.append(key)
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for flag in flags + false_flags:
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del params["options"][flag]
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if not params.get("options"):
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params["options"] = {}
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params["flags"] = flags
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LOG.debug("Writing resolv.conf from template %s", template_fn)
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templater.render_to_file(template_fn, target_fname, params)
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def handle(name: str, cfg: Config, cloud: Cloud, args: list) -> None:
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"""
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Handler for resolv.conf
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@param name: The module name "resolv_conf" from cloud.cfg
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@param cfg: A nested dict containing the entire cloud config contents.
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@param cloud: The L{CloudInit} object in use.
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@param log: Pre-initialized Python logger object to use for logging.
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@param args: Any module arguments from cloud.cfg
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"""
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if "manage_resolv_conf" not in cfg:
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LOG.debug(
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"Skipping module named %s,"
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" no 'manage_resolv_conf' key in configuration",
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name,
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)
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return
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if not util.get_cfg_option_bool(cfg, "manage_resolv_conf", False):
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LOG.debug(
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"Skipping module named %s,"
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" 'manage_resolv_conf' present but set to False",
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name,
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)
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return
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if "resolv_conf" not in cfg:
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LOG.warning("manage_resolv_conf True but no parameters provided!")
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return
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try:
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template_fn = cloud.get_template_filename(
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RESOLVE_CONFIG_TEMPLATE_MAP[cloud.distro.resolve_conf_fn]
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)
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except KeyError:
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LOG.warning("No template found, not rendering resolve configs")
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return
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generate_resolv_conf(
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template_fn=template_fn,
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params=cfg["resolv_conf"],
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target_fname=cloud.distro.resolve_conf_fn,
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)
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return
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