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# Author: Alexander Bokovoy <abokovoy@redhat.com> 

# 

# Copyright (C) 2011   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/>. 

# 

 

from ipapython import ipautil 

from ipapython.platform import base, redhat, systemd 

import os 

 

# All what we allow exporting directly from this module 

# Everything else is made available through these symbols when they directly imported into ipapython.services: 

# authconfig -- class reference for platform-specific implementation of authconfig(8) 

# service    -- class reference for platform-specific implementation of a PlatformService class 

# knownservices -- factory instance to access named services IPA cares about, names are ipapython.services.wellknownservices 

# backup_and_replace_hostname -- platform-specific way to set hostname and make it persistent over reboots 

# restore_context -- platform-sepcific way to restore security context, if applicable 

__all__ = ['authconfig', 'service', 'knownservices', 'backup_and_replace_hostname', 'restore_context'] 

 

# 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(map(lambda x: (x, "%s.service" % (x)), base.wellknownservices)) 

 

# Rewrite dirsrv and pki-cad services as they support instances via separate service generator 

# To make this working, one needs to have both foo@.service and foo.target -- the latter is used 

# when request should be coming for all instances (like stop). systemd, unfortunately, does not allow 

# 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' 

# Our PKI instance is pki-cad@pki-ca.service 

system_units['pki-cad'] = 'pki-cad@pki-ca.service' 

 

class Fedora16Service(systemd.SystemdService): 

    def __init__(self, service_name): 

        if service_name in system_units: 

            service_name = system_units[service_name] 

        else: 

            if len(service_name.split('.')) == 1: 

                # 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 

                service_name = "%s.service" % (service_name) 

        super(Fedora16Service, self).__init__(service_name) 

 

# Special handling of directory server service 

# 

# 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(). 

class Fedora16DirectoryService(Fedora16Service): 

    def enable(self, instance_name=""): 

        super(Fedora16DirectoryService, self).enable(instance_name) 

        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':'8192'} 

            ipautil.inifile_replace_variables(dirsrv_systemd, 'service', replacevars=replacevars) 

            redhat.restore_context(dirsrv_systemd) 

            ipautil.run(["/bin/systemctl", "--system", "daemon-reload"],raiseonerr=False) 

 

    def restart(self, instance_name="", capture_output=True): 

        if len(instance_name) > 0: 

            elements = self.service_name.split("@") 

            srv_etc = os.path.join(self.SYSTEMD_ETC_PATH, self.service_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(Fedora16DirectoryService, self).restart(instance_name, capture_output=capture_output) 

 

# 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. 

class Fedora16IPAService(Fedora16Service): 

    def enable(self, instance_name=""): 

        super(Fedora16IPAService, self).enable(instance_name) 

        self.restart(instance_name) 

 

class Fedora16SSHService(Fedora16Service): 

    def get_config_dir(self, instance_name=""): 

        return '/etc/ssh' 

 

# Redirect directory server service through special sub-class due to its special handling of instances 

def f16_service(name): 

    if name == 'dirsrv': 

        return Fedora16DirectoryService(name) 

    if name == 'ipa': 

        return Fedora16IPAService(name) 

    if name == 'sshd': 

        return Fedora16SSHService(name) 

    return Fedora16Service(name) 

 

class Fedora16Services(base.KnownServices): 

    def __init__(self): 

        services = dict() 

        for s in base.wellknownservices: 

            services[s] = f16_service(s) 

        # Call base class constructor. This will lock services to read-only 

        super(Fedora16Services, self).__init__(services) 

 

authconfig = redhat.authconfig 

service = f16_service 

knownservices = Fedora16Services() 

restore_context = redhat.restore_context 

backup_and_replace_hostname = redhat.backup_and_replace_hostname