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# Copyright (C) 2015 Canonical Ltd.
#
# Author: Scott Moser <[email protected]>
#
# This file is part of cloud-init. See LICENSE file for license information.
"""Fan: Configure ubuntu fan networking"""
import logging
from textwrap import dedent
from cloudinit import subp, util
from cloudinit.cloud import Cloud
from cloudinit.config import Config
from cloudinit.config.schema import MetaSchema, get_meta_doc
from cloudinit.settings import PER_INSTANCE
MODULE_DESCRIPTION = """\
This module installs, configures and starts the ubuntu fan network system. For
more information about Ubuntu Fan, see:
``https://wiki.ubuntu.com/FanNetworking``.
If cloud-init sees a ``fan`` entry in cloud-config it will:
- write ``config_path`` with the contents of the ``config`` key
- install the package ``ubuntu-fan`` if it is not installed
- ensure the service is started (or restarted if was previously running)
Additionally, the ``ubuntu-fan`` package will be automatically installed
if not present.
"""
distros = ["ubuntu"]
meta: MetaSchema = {
"id": "cc_fan",
"name": "Fan",
"title": "Configure ubuntu fan networking",
"description": MODULE_DESCRIPTION,
"distros": distros,
"frequency": PER_INSTANCE,
"examples": [
dedent(
"""\
fan:
config: |
# fan 240
10.0.0.0/8 eth0/16 dhcp
10.0.0.0/8 eth1/16 dhcp off
# fan 241
241.0.0.0/8 eth0/16 dhcp
config_path: /etc/network/fan
"""
)
],
"activate_by_schema_keys": ["fan"],
}
__doc__ = get_meta_doc(meta)
LOG = logging.getLogger(__name__)
BUILTIN_CFG = {
"config": None,
"config_path": "/etc/network/fan",
}
def stop_update_start(distro, service, config_file, content):
try:
distro.manage_service("stop", service)
stop_failed = False
except subp.ProcessExecutionError as e:
stop_failed = True
LOG.warning("failed to stop %s: %s", service, e)
if not content.endswith("\n"):
content += "\n"
util.write_file(config_file, content, omode="w")
try:
distro.manage_service("start", service)
if stop_failed:
LOG.warning("success: %s started", service)
except subp.ProcessExecutionError as e:
LOG.warning("failed to start %s: %s", service, e)
distro.manage_service("enable", service)
def handle(name: str, cfg: Config, cloud: Cloud, args: list) -> None:
cfgin = cfg.get("fan")
if not cfgin:
cfgin = {}
mycfg = util.mergemanydict([cfgin, BUILTIN_CFG])
if not mycfg.get("config"):
LOG.debug("%s: no 'fan' config entry. disabling", name)
return
util.write_file(mycfg.get("config_path"), mycfg.get("config"), omode="w")
distro = cloud.distro
if not subp.which("fanctl"):
distro.install_packages(["ubuntu-fan"])
stop_update_start(
distro,
service="ubuntu-fan",
config_file=mycfg.get("config_path"),
content=mycfg.get("config"),
)
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