freeipa/ipaplatform/fedora/services.py

236 lines
9.3 KiB
Python

# Author: Alexander Bokovoy <abokovoy@redhat.com>
# Tomas Babej <tbabej@redhat.com>
#
# Copyright (C) 2011-2014 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
"""
Contains Fedora-specific service class implementations.
"""
import os
import time
from ipaplatform.tasks import tasks
from ipaplatform.base import services as base_services
from ipapython import ipautil, dogtag
from ipapython.ipa_log_manager import root_logger
from ipalib import api
# Mappings from service names as FreeIPA code references to these services
# to their actual systemd service names
# For beginning just remap names to add .service
# As more services will migrate to systemd, unit names will deviate and
# mapping will be kept in this dictionary
system_units = dict((x, "%s.service" % x)
for x in base_services.wellknownservices)
system_units['rpcgssd'] = 'nfs-secure.service'
system_units['rpcidmapd'] = 'nfs-idmap.service'
# Rewrite dirsrv and pki-tomcatd services as they support instances via separate
# service generator. To make this working, one needs to have both foo@.servic
# and foo.target -- the latter is used when request should be coming for
# all instances (like stop). systemd, unfortunately, does not allow one
# to request action for all service instances at once if only foo@.service
# unit is available. To add more, if any of those services need to be
# started/stopped automagically, one needs to manually create symlinks in
# /etc/systemd/system/foo.target.wants/ (look into systemd.py's enable()
# code).
system_units['dirsrv'] = 'dirsrv@.service'
# Our directory server instance for PKI is dirsrv@PKI-IPA.service
system_units['pkids'] = 'dirsrv@PKI-IPA.service'
# Old style PKI instance
system_units['pki-cad'] = 'pki-cad@pki-ca.service'
system_units['pki_cad'] = system_units['pki-cad']
# Our PKI instance is pki-tomcatd@pki-tomcat.service
system_units['pki-tomcatd'] = 'pki-tomcatd@pki-tomcat.service'
system_units['pki_tomcatd'] = system_units['pki-tomcatd']
system_units['ipa-otpd'] = 'ipa-otpd.socket'
# Service that sets domainname on Fedora is called fedora-domainname.service
system_units['domainname'] = 'fedora-domainname.service'
# Service classes that implement Fedora-specific behaviour
class FedoraService(base_services.SystemdService):
def __init__(self, service_name):
systemd_name = service_name
if service_name in system_units:
systemd_name = system_units[service_name]
else:
if '.' not in service_name:
# if service_name does not have a dot, it is not foo.service
# and not a foo.target. Thus, not correct service name for
# systemd, default to foo.service style then
systemd_name = "%s.service" % (service_name)
super(FedoraService, self).__init__(service_name, systemd_name)
class FedoraDirectoryService(FedoraService):
def tune_nofile_platform(self, num=8192, fstore=None):
"""
Increase the number of files descriptors available to directory server
from the default 1024 to 8192. This will allow to support a greater
number of clients out of the box.
This is a part of the implementation that is systemd-specific.
Returns False if the setting of the nofile limit needs to be skipped.
"""
dirsrv_systemd = "/etc/sysconfig/dirsrv.systemd"
if os.path.exists(dirsrv_systemd):
# We need to enable LimitNOFILE=8192 in the dirsrv@.service
# Since 389-ds-base-1.2.10-0.8.a7 the configuration of the
# service parameters is performed via
# /etc/sysconfig/dirsrv.systemd file which is imported by systemd
# into dirsrv@.service unit
replacevars = {'LimitNOFILE': str(num)}
ipautil.inifile_replace_variables(dirsrv_systemd,
'service',
replacevars=replacevars)
tasks.restore_context(dirsrv_systemd)
ipautil.run(["/bin/systemctl", "--system", "daemon-reload"],
raiseonerr=False)
return True
def restart(self, instance_name="", capture_output=True, wait=True):
# We need to explicitly enable instances to install proper symlinks as
# dirsrv.target.wants/ dependencies. Standard systemd service class does it
# on enable() method call. Unfortunately, ipa-server-install does not do
# explicit dirsrv.enable() because the service startup is handled by ipactl.
#
# If we wouldn't do this, our instances will not be started as systemd would
# not have any clue about instances (PKI-IPA and the domain we serve)
# at all. Thus, hook into dirsrv.restart().
if instance_name:
elements = self.systemd_name.split("@")
srv_etc = os.path.join(self.SYSTEMD_ETC_PATH,
self.systemd_name)
srv_tgt = os.path.join(self.SYSTEMD_ETC_PATH,
self.SYSTEMD_SRV_TARGET % (elements[0]))
srv_lnk = os.path.join(srv_tgt,
self.service_instance(instance_name))
if not os.path.exists(srv_etc):
self.enable(instance_name)
elif not os.path.samefile(srv_etc, srv_lnk):
os.unlink(srv_lnk)
os.symlink(srv_etc, srv_lnk)
super(FedoraDirectoryService, self).restart(instance_name,
capture_output=capture_output, wait=wait)
class FedoraIPAService(FedoraService):
# Enforce restart of IPA services when we do enable it
# This gets around the fact that after ipa-server-install systemd thinks
# ipa.service is not yet started but all services were actually started
# already.
def enable(self, instance_name=""):
super(FedoraIPAService, self).enable(instance_name)
self.restart(instance_name)
class FedoraSSHService(FedoraService):
def get_config_dir(self, instance_name=""):
return '/etc/ssh'
class FedoraCAService(FedoraService):
def wait_until_running(self):
# We must not wait for the httpd proxy if httpd is not set up yet.
# Unfortunately, knownservices.httpd.is_installed() can return
# false positives, so check for existence of our configuration file.
# TODO: Use a cleaner solution
use_proxy = True
if not (os.path.exists('/etc/httpd/conf.d/ipa.conf') and
os.path.exists('/etc/httpd/conf.d/ipa-pki-proxy.conf')):
root_logger.debug(
'The httpd proxy is not installed, wait on local port')
use_proxy = False
root_logger.debug('Waiting until the CA is running')
timeout = float(api.env.startup_timeout)
op_timeout = time.time() + timeout
while time.time() < op_timeout:
try:
status = dogtag.ca_status(use_proxy=use_proxy)
except Exception:
status = 'check interrupted'
root_logger.debug('The CA status is: %s' % status)
if status == 'running':
break
root_logger.debug('Waiting for CA to start...')
time.sleep(1)
else:
raise RuntimeError('CA did not start in %ss' % timeout)
def start(self, instance_name="", capture_output=True, wait=True):
super(FedoraCAService, self).start(
instance_name, capture_output=capture_output, wait=wait)
if wait:
self.wait_until_running()
def restart(self, instance_name="", capture_output=True, wait=True):
super(FedoraCAService, self).restart(
instance_name, capture_output=capture_output, wait=wait)
if wait:
self.wait_until_running()
# Function that constructs proper Fedora-specific server classes for services
# of specified name
def fedora_service_class_factory(name):
if name == 'dirsrv':
return FedoraDirectoryService(name)
if name == 'ipa':
return FedoraIPAService(name)
if name == 'sshd':
return FedoraSSHService(name)
if name in ('pki-cad', 'pki_cad', 'pki-tomcatd', 'pki_tomcatd'):
return FedoraCAService(name)
return FedoraService(name)
# Magicdict containing FedoraService instances.
class FedoraServices(base_services.KnownServices):
def __init__(self):
services = dict()
for s in base_services.wellknownservices:
services[s] = fedora_service_class_factory(s)
# Call base class constructor. This will lock services to read-only
super(FedoraServices, self).__init__(services)
# Objects below are expected to be exported by platform module
from ipaplatform.base.services import timedate_services
service = fedora_service_class_factory
knownservices = FedoraServices()