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# Copyright (C) 2016 Matt Dainty
# Copyright (C) 2020 Dermot Bradley
#
# Author: Matt Dainty <matt@bodgit-n-scarper.com>
# Author: Dermot Bradley <dermot_bradley@yahoo.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
from cloudinit import distros, helpers, subp, util
from cloudinit.distros.parsers.hostname import HostnameConf
from cloudinit.settings import PER_INSTANCE
NETWORK_FILE_HEADER = """\
# This file is generated from information provided by the datasource. Changes
# to it will not persist across an instance reboot. To disable cloud-init's
# network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
"""
class Distro(distros.Distro):
pip_package_name = "py3-pip"
locale_conf_fn = "/etc/profile.d/locale.sh"
network_conf_fn = "/etc/network/interfaces"
renderer_configs = {
"eni": {"eni_path": network_conf_fn, "eni_header": NETWORK_FILE_HEADER}
}
def __init__(self, name, cfg, paths):
distros.Distro.__init__(self, name, cfg, paths)
# This will be used to restrict certain
# calls from repeatly happening (when they
# should only happen say once per instance...)
self._runner = helpers.Runners(paths)
self.default_locale = "C.UTF-8"
self.osfamily = "alpine"
cfg["ssh_svcname"] = "sshd"
def get_locale(self):
"""The default locale for Alpine Linux is different than
cloud-init's DataSource default.
"""
return self.default_locale
def apply_locale(self, locale, out_fn=None):
# Alpine has limited locale support due to musl library limitations
if not locale:
locale = self.default_locale
if not out_fn:
out_fn = self.locale_conf_fn
lines = [
"#",
"# This file is created by cloud-init once per new instance boot",
"#",
"export CHARSET=UTF-8",
"export LANG=%s" % locale,
"export LC_COLLATE=C",
"",
]
util.write_file(out_fn, "\n".join(lines), 0o644)
def install_packages(self, pkglist):
self.update_package_sources()
self.package_command("add", pkgs=pkglist)
def _write_hostname(self, hostname, filename):
conf = None
try:
# Try to update the previous one
# so lets see if we can read it first.
conf = self._read_hostname_conf(filename)
except IOError:
pass
if not conf:
conf = HostnameConf("")
conf.set_hostname(hostname)
util.write_file(filename, str(conf), 0o644)
def _read_system_hostname(self):
sys_hostname = self._read_hostname(self.hostname_conf_fn)
return (self.hostname_conf_fn, sys_hostname)
def _read_hostname_conf(self, filename):
conf = HostnameConf(util.load_file(filename))
conf.parse()
return conf
def _read_hostname(self, filename, default=None):
hostname = None
try:
conf = self._read_hostname_conf(filename)
hostname = conf.hostname
except IOError:
pass
if not hostname:
return default
return hostname
def _get_localhost_ip(self):
return "127.0.1.1"
def set_timezone(self, tz):
distros.set_etc_timezone(tz=tz, tz_file=self._find_tz_file(tz))
def package_command(self, command, args=None, pkgs=None):
if pkgs is None:
pkgs = []
cmd = ["apk"]
# Redirect output
cmd.append("--quiet")
if args and isinstance(args, str):
cmd.append(args)
elif args and isinstance(args, list):
cmd.extend(args)
if command:
cmd.append(command)
if command == "upgrade":
cmd.extend(["--update-cache", "--available"])
pkglist = util.expand_package_list("%s-%s", pkgs)
cmd.extend(pkglist)
# Allow the output of this to flow outwards (ie not be captured)
subp.subp(cmd, capture=False)
def update_package_sources(self):
self._runner.run(
"update-sources",
self.package_command,
["update"],
freq=PER_INSTANCE,
)
@property
def preferred_ntp_clients(self):
"""Allow distro to determine the preferred ntp client list"""
if not self._preferred_ntp_clients:
self._preferred_ntp_clients = ["chrony", "ntp"]
return self._preferred_ntp_clients
def shutdown_command(self, mode="poweroff", delay="now", message=None):
# called from cc_power_state_change.load_power_state
# Alpine has halt/poweroff/reboot, with the following specifics:
# - we use them rather than the generic "shutdown"
# - delay is given with "-d [integer]"
# - the integer is in seconds, cannot be "now", and takes no "+"
# - no message is supported (argument ignored, here)
command = [mode, "-d"]
# Convert delay from minutes to seconds, as Alpine's
# halt/poweroff/reboot commands take seconds rather than minutes.
if delay == "now":
# Alpine's commands do not understand "now".
command += ["0"]
else:
try:
command.append(str(int(delay) * 60))
except ValueError as e:
raise TypeError(
"power_state[delay] must be 'now' or '+m' (minutes)."
" found '%s'." % (delay,)
) from e
return command
@staticmethod
def uses_systemd():
"""
Alpine uses OpenRC, not systemd
"""
return False
@classmethod
def manage_service(
self, action: str, service: str, *extra_args: str, rcs=None
):
"""
Perform the requested action on a service. This handles OpenRC
specific implementation details.
OpenRC has two distinct commands relating to services,
'rc-service' and 'rc-update' and the order of their argument
lists differ.
May raise ProcessExecutionError
"""
init_cmd = ["rc-service", "--nocolor"]
update_cmd = ["rc-update", "--nocolor"]
cmds = {
"stop": list(init_cmd) + [service, "stop"],
"start": list(init_cmd) + [service, "start"],
"disable": list(update_cmd) + ["del", service],
"enable": list(update_cmd) + ["add", service],
"restart": list(init_cmd) + [service, "restart"],
"reload": list(init_cmd) + [service, "restart"],
"try-reload": list(init_cmd) + [service, "restart"],
"status": list(init_cmd) + [service, "status"],
}
cmd = list(cmds[action])
return subp.subp(cmd, capture=True, rcs=rcs)
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