/usr/share/pyshared/ipapython/platform/systemd.py is in python-freeipa 2.1.4-0ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 | # 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
import sys, os, shutil
class SystemdService(base.PlatformService):
SYSTEMD_ETC_PATH = "/etc/systemd/system/"
SYSTEMD_LIB_PATH = "/lib/systemd/system/"
SYSTEMD_SRV_TARGET = "%s.target.wants"
def __init__(self, service_name):
super(SystemdService, self).__init__(service_name)
self.lib_path = os.path.join(self.SYSTEMD_LIB_PATH, self.service_name)
self.lib_path_exists = None
def service_instance(self, instance_name):
if self.lib_path_exists is None:
self.lib_path_exists = os.path.exists(self.lib_path)
elements = self.service_name.split("@")
# Short-cut: if there is already exact service name, return it
if self.lib_path_exists and len(instance_name) == 0:
if len(elements) == 1:
# service name is like pki-cad.target or krb5kdc.service
return self.service_name
if len(elements) > 1 and elements[1][0] != '.':
# Service name is like pki-cad@pki-ca.service and that file exists
return self.service_name
if len(elements) > 1:
# We have dynamic service
if len(instance_name) > 0:
# Instanciate dynamic service
return "%s@%s.service" % (elements[0], instance_name)
else:
# No instance name, try with target
tgt_name = "%s.target" % (elements[0])
srv_lib = os.path.join(self.SYSTEMD_LIB_PATH, tgt_name)
if os.path.exists(srv_lib):
return tgt_name
return self.service_name
def parse_variables(self, text, separator=None):
"""
Parses 'systemctl show' output and returns a dict[variable]=value
Arguments: text -- 'systemctl show' output as string
separator -- optional (defaults to None), what separates the key/value pairs in the text
"""
def splitter(x, separator=None):
if len(x) > 1:
y = x.split(separator)
return (y[0], y[-1])
return (None,None)
return dict(map(lambda x: splitter(x, separator=separator), text.split("\n")))
def stop(self, instance_name="", capture_output=True):
ipautil.run(["/bin/systemctl", "stop", self.service_instance(instance_name)], capture_output=capture_output)
def start(self, instance_name="", capture_output=True):
ipautil.run(["/bin/systemctl", "start", self.service_instance(instance_name)], capture_output=capture_output)
def restart(self, instance_name="", capture_output=True):
# Restart command is broken before systemd-36-3.fc16
# If you have older systemd version, restart of dependent services will hang systemd indefinetly
ipautil.run(["/bin/systemctl", "restart", self.service_instance(instance_name)], capture_output=capture_output)
def is_running(self, instance_name=""):
ret = True
try:
(sout, serr, rcode) = ipautil.run(["/bin/systemctl", "is-active", self.service_instance(instance_name)],capture_output=True)
if rcode != 0:
ret = False
except ipautil.CalledProcessError:
ret = False
return ret
def is_installed(self):
installed = True
try:
(sout,serr,rcode) = ipautil.run(["/bin/systemctl", "list-unit-files", "--full"])
if rcode != 0:
installed = False
else:
svar = self.parse_variables(sout)
if not self.service_instance("") in svar:
# systemd doesn't show the service
installed = False
except ipautil.CalledProcessError, e:
installed = False
return installed
def is_enabled(self, instance_name=""):
enabled = True
try:
(sout,serr,rcode) = ipautil.run(["/bin/systemctl", "is-enabled", self.service_instance(instance_name)])
if rcode != 0:
enabled = False
except ipautil.CalledProcessError, e:
enabled = False
return enabled
def enable(self, instance_name=""):
if self.lib_path_exists is None:
self.lib_path_exists = os.path.exists(self.lib_path)
elements = self.service_name.split("@")
l = len(elements)
if self.lib_path_exists and (l > 1 and elements[1][0] != '.'):
# There is explicit service unit supporting this instance, follow normal systemd enabler
self.__enable(instance_name)
return
if self.lib_path_exists and (l == 1):
# There is explicit service unit which does not support the instances, ignore instance
self.__enable()
return
if len(instance_name) > 0 and l > 1:
# New instance, we need to do following:
# 1. Copy <service>@.service to /etc/systemd/system/ if it is not there
# 2. Make /etc/systemd/system/<service>.target.wants/ if it is not there
# 3. Link /etc/systemd/system/<service>.target.wants/<service>@<instance_name>.service to
# /etc/systemd/system/<service>@.service
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))
try:
if not ipautil.file_exists(srv_etc):
shutil.copy(self.lib_path, srv_etc)
if not ipautil.dir_exists(srv_tgt):
os.mkdir(srv_tgt)
if os.path.exists(srv_lnk):
# Remove old link
os.unlink(srv_lnk)
if not os.path.exists(srv_lnk):
# object does not exist _or_ is a broken link
if not os.path.islink(srv_lnk):
# if it truly does not exist, make a link
os.symlink(srv_etc, srv_lnk)
else:
# Link exists and it is broken, make new one
os.unlink(srv_lnk)
os.symlink(srv_etc, srv_lnk)
ipautil.run(["/bin/systemctl", "--system", "daemon-reload"])
except:
pass
else:
self.__enable(instance_name)
def disable(self, instance_name=""):
elements = self.service_name.split("@")
if instance_name != "" and len(elements) > 1:
# Remove instance, we need to do following:
# Remove link from /etc/systemd/system/<service>.target.wants/<service>@<instance_name>.service
# to /etc/systemd/system/<service>@.service
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))
try:
if ipautil.dir_exists(srv_tgt):
if os.path.islink(srv_lnk):
os.unlink(srv_lnk)
ipautil.run(["/bin/systemctl", "--system", "daemon-reload"])
except:
pass
else:
self.__disable(instance_name)
def __enable(self, instance_name=""):
try:
ipautil.run(["/bin/systemctl", "enable", self.service_instance(instance_name)])
except ipautil.CalledProcessError, e:
pass
def __disable(self, instance_name=""):
try:
ipautil.run(["/bin/systemctl", "disable", self.service_instance(instance_name)])
except ipautil.CalledProcessError, e:
pass
def install(self):
self.enable()
def remove(self):
self.disable()
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