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cloudinit
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distros
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rhel.py
# Copyright (C) 2012 Canonical Ltd. # Copyright (C) 2012, 2013 Hewlett-Packard Development Company, L.P. # Copyright (C) 2012 Yahoo! Inc. # # Author: Scott Moser <scott.moser@canonical.com> # Author: Juerg Haefliger <juerg.haefliger@hp.com> # Author: Joshua Harlow <harlowja@yahoo-inc.com> # # This file is part of cloud-init. See LICENSE file for license information. import logging import os from cloudinit import distros, helpers, subp, util from cloudinit.distros import PackageList, rhel_util from cloudinit.distros.parsers.hostname import HostnameConf from cloudinit.settings import PER_ALWAYS, PER_INSTANCE LOG = logging.getLogger(__name__) class Distro(distros.Distro): # See: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-Network_Configuration_Using_sysconfig_Files.html # noqa clock_conf_fn = "/etc/sysconfig/clock" locale_conf_fn = "/etc/sysconfig/i18n" systemd_locale_conf_fn = "/etc/locale.conf" network_conf_fn = "/etc/sysconfig/network" hostname_conf_fn = "/etc/sysconfig/network" systemd_hostname_conf_fn = "/etc/hostname" tz_local_fn = "/etc/localtime" usr_lib_exec = "/usr/libexec" # RHEL and derivatives use NetworkManager DHCP client by default. # But if NM is configured with using dhclient ("dhcp=dhclient" statement) # then the following location is used: # /var/lib/NetworkManager/dhclient-<uuid>-<network_interface>.lease dhclient_lease_directory = "/var/lib/NetworkManager" dhclient_lease_file_regex = r"dhclient-[\w-]+\.lease" renderer_configs = { "sysconfig": { "control": "etc/sysconfig/network", "iface_templates": "%(base)s/network-scripts/ifcfg-%(name)s", "route_templates": { "ipv4": "%(base)s/network-scripts/route-%(name)s", "ipv6": "%(base)s/network-scripts/route6-%(name)s", }, } } # Should be fqdn if we can use it # See: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/deployment_guide/ch-sysconfig # noqa: E501 prefer_fqdn = True def __init__(self, name, cfg, paths): distros.Distro.__init__(self, name, cfg, paths) # This will be used to restrict certain # calls from repeatedly happening (when they # should only happen say once per instance...) self._runner = helpers.Runners(paths) self.osfamily = "redhat" self.default_locale = "en_US.UTF-8" self.system_locale = None cfg["ssh_svcname"] = "sshd" def install_packages(self, pkglist: PackageList): self.package_command("install", pkgs=pkglist) def get_locale(self): """Return the default locale if set, else use system locale""" # read system locale value if not self.system_locale: self.system_locale = self._read_system_locale() # Return system_locale setting if valid, else use default locale return ( self.system_locale if self.system_locale else self.default_locale ) def apply_locale(self, locale, out_fn=None): if self.uses_systemd(): if not out_fn: out_fn = self.systemd_locale_conf_fn else: if not out_fn: out_fn = self.locale_conf_fn locale_cfg = { "LANG": locale, } rhel_util.update_sysconfig_file(out_fn, locale_cfg) def _read_system_locale(self, keyname="LANG"): """Read system default locale setting, if present""" if self.uses_systemd(): locale_fn = self.systemd_locale_conf_fn else: locale_fn = self.locale_conf_fn if not locale_fn: raise ValueError("Invalid path: %s" % locale_fn) if os.path.exists(locale_fn): (_exists, contents) = rhel_util.read_sysconfig_file(locale_fn) if keyname in contents: return contents[keyname] else: return None def _write_hostname(self, hostname, filename): # systemd will never update previous-hostname for us, so # we need to do it ourselves if self.uses_systemd() and filename.endswith("/previous-hostname"): conf = HostnameConf("") conf.set_hostname(hostname) util.write_file(filename, str(conf), 0o644) elif self.uses_systemd(): create_hostname_file = util.get_cfg_option_bool( self._cfg, "create_hostname_file", True ) if create_hostname_file: subp.subp(["hostnamectl", "set-hostname", str(hostname)]) else: subp.subp( [ "hostnamectl", "set-hostname", "--transient", str(hostname), ] ) LOG.info( "create_hostname_file is False; hostname set transiently" ) else: host_cfg = { "HOSTNAME": hostname, } rhel_util.update_sysconfig_file(filename, host_cfg) def _read_system_hostname(self): if self.uses_systemd(): host_fn = self.systemd_hostname_conf_fn else: host_fn = self.hostname_conf_fn return (host_fn, self._read_hostname(host_fn)) def _read_hostname(self, filename, default=None): if self.uses_systemd() and filename.endswith("/previous-hostname"): return util.load_text_file(filename).strip() elif self.uses_systemd(): (out, _err) = subp.subp(["hostname"]) out = out.strip() if len(out): return out else: return default else: (_exists, contents) = rhel_util.read_sysconfig_file(filename) if "HOSTNAME" in contents: return contents["HOSTNAME"] else: return default def set_timezone(self, tz): tz_file = self._find_tz_file(tz) if self.uses_systemd(): # Currently, timedatectl complains if invoked during startup # so for compatibility, create the link manually. util.del_file(self.tz_local_fn) util.sym_link(tz_file, self.tz_local_fn) else: # Adjust the sysconfig clock zone setting clock_cfg = { "ZONE": str(tz), } rhel_util.update_sysconfig_file(self.clock_conf_fn, clock_cfg) # This ensures that the correct tz will be used for the system util.copy(tz_file, self.tz_local_fn) def package_command(self, command, args=None, pkgs=None): if pkgs is None: pkgs = [] if subp.which("dnf"): LOG.debug("Using DNF for package management") cmd = ["dnf"] else: LOG.debug("Using YUM for package management") # the '-t' argument makes yum tolerant of errors on the command # line with regard to packages. # # For example: if you request to install foo, bar and baz and baz # is installed; yum won't error out complaining that baz is already # installed. cmd = ["yum", "-t"] # Determines whether or not yum prompts for confirmation # of critical actions. We don't want to prompt... cmd.append("-y") if args and isinstance(args, str): cmd.append(args) elif args and isinstance(args, list): cmd.extend(args) cmd.append(command) 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, *, force=False): self._runner.run( "update-sources", self.package_command, ["makecache"], freq=PER_ALWAYS if force else PER_INSTANCE, )
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