Re-factor the ipa_webgui and ipa_kpasswd instance code

The ipa_webgui and ipa_kpasswd instance code is identical
and I want to add another similar instance down the line,
so re-factor the code into a service.SimpleServiceInstance
class.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>

ipa-server/ipa-install/ipa-server-install

@@ -44,7 +44,6 @@ import ipaserver.krbinstance
 import ipaserver.bindinstance
 import ipaserver.httpinstance
 import ipaserver.ntpinstance
-import ipaserver.webguiinstance
 
 from ipaserver import service
 from ipaserver import sysrestore
@@ -275,7 +274,7 @@ def check_dirsrv():
 def uninstall():
     ipaserver.ntpinstance.NTPInstance().uninstall()
     ipaserver.bindinstance.BindInstance().uninstall()
-    ipaserver.webguiinstance.WebGuiInstance().uninstall()
+    ipaserver.httpinstance.WebGuiInstance().uninstall()
     ipaserver.httpinstance.HTTPInstance().uninstall()
     ipaserver.krbinstance.KrbInstance().uninstall()
     ipaserver.dsinstance.DsInstance().uninstall()
@@ -432,7 +431,7 @@ def main():
     http.create_instance(realm_name, host_name)
 
     # Create a Web Gui instance
-    webgui = ipaserver.webguiinstance.WebGuiInstance()
+    webgui = ipaserver.httpinstance.WebGuiInstance()
     webgui.create_instance()
 
     bind.setup(host_name, ip_address, realm_name)

ipa-server/ipaserver/Makefile.am

@@ -9,7 +9,6 @@ app_PYTHON = 			\
 	krbinstance.py		\
 	httpinstance.py		\
 	ntpinstance.py		\
-	webguiinstance.py	\
 	service.py		\
 	installutils.py		\
 	replication.py		\

ipa-server/ipaserver/httpinstance.py

@@ -47,6 +47,10 @@ successfully change with the command:
 Try updating the policycoreutils and selinux-policy packages.
 """
 
+class WebGuiInstance(service.SimpleServiceInstance):
+    def __init__(self):
+        service.SimpleServiceInstance.__init__(self, "ipa_webgui")
+
 class HTTPInstance(service.Service):
     def __init__(self):
         service.Service.__init__(self, "httpd")

ipa-server/ipaserver/krbinstance.py

@@ -72,6 +72,10 @@ def update_key_val_in_file(filename, key, val):
     f.write("%s=%s\n" % (key, val))
     f.close()
 
+class KpasswdInstance(service.SimpleServiceInstance):
+    def __init__(self):
+        service.SimpleServiceInstance.__init__(self, "ipa_kpasswd")
+    
 class KrbInstance(service.Service):
     def __init__(self):
         service.Service.__init__(self, "krb5kdc")
@@ -86,6 +90,8 @@ class KrbInstance(service.Service):
         self.kdc_password = None
         self.sub_dict = None
 
+        self.kpasswd = KpasswdInstance()
+
     def __common_setup(self, ds_user, realm_name, host_name, admin_password):
         self.ds_user = ds_user
         self.fqdn = host_name        
@@ -117,7 +123,6 @@ class KrbInstance(service.Service):
     def __common_post_setup(self):
         self.step("starting the KDC", self.__start_instance)
         self.step("configuring KDC to start on boot", self.__enable)
-        self.step("enabling and starting ipa_kpasswd", self.__enable_kpasswd)
 
     def create_instance(self, ds_user, realm_name, host_name, admin_password, master_password):
         self.master_password = master_password
@@ -139,6 +144,8 @@ class KrbInstance(service.Service):
 
         self.start_creation("Configuring Kerberos KDC")
 
+        self.kpasswd.create_instance()
+
     def create_replica(self, ds_user, realm_name, host_name, admin_password, ldap_passwd_filename):
         self.__copy_ldap_passwd(ldap_passwd_filename)
 
@@ -155,6 +162,8 @@ class KrbInstance(service.Service):
 
         self.start_creation("Configuring Kerberos KDC")
 
+        self.kpasswd.create_instance()
+
     def __copy_ldap_passwd(self, filename):
         sysrestore.backup_file("/var/kerberos/krb5kdc/ldappwd")
         shutil.copy(filename, "/var/kerberos/krb5kdc/ldappwd")
@@ -181,12 +190,6 @@ class KrbInstance(service.Service):
         except:
             logging.critical("krb5kdc service failed to start")
 
-    def __enable_kpasswd(self):
-        sysrestore.backup_state("ipa_kpasswd", "enabled", service.is_enabled("ipa_kpasswd"))
-        sysrestore.backup_state("ipa_kpasswd", "running", service.is_running("ipa_kpasswd"))
-        service.chkconfig_on("ipa_kpasswd")
-        service.start("ipa_kpasswd")
-
     def __setup_sub_dict(self):
         self.sub_dict = dict(FQDN=self.fqdn,
                              IP=self.ip,
@@ -379,21 +382,16 @@ class KrbInstance(service.Service):
         os.chown("/var/kerberos/krb5kdc/kpasswd.keytab", pent.pw_uid, pent.pw_gid)
 
     def uninstall(self):
+        self.kpasswd.uninstall()
+
         running = self.restore_state("running")
         enabled = self.restore_state("enabled")
 
-        kpasswd_running = sysrestore.restore_state("ipa_kpasswd", "running")
-        kpasswd_enabled = sysrestore.restore_state("ipa_kpasswd", "enabled")
-
         if not running is None:
             self.stop()
-        if not kpasswd_running is None:
-            service.stop("ipa_kpasswd")
 
         if not enabled is None and not enabled:
             self.chkconfig_off()
-        if not kpasswd_enabled is None and not kpasswd_enabled:
-            service.chkconfig_off("ipa_kpasswd")
 
         for f in ["/var/kerberos/krb5kdc/ldappwd",
                   "/var/kerberos/krb5kdc/kdc.conf",
@@ -410,5 +408,3 @@ class KrbInstance(service.Service):
 
         if not running is None and running:
             self.start()
-        if not kpasswd_running is None and kpasswd_running:
-            service.start("ipa_kpasswd")

ipa-server/ipaserver/service.py

@@ -125,3 +125,26 @@ class Service:
         self.print_msg("done configuring %s." % self.service_name)
 
         self.steps = []
+
+class SimpleServiceInstance(Service):
+    def create_instance(self):
+        self.step("starting %s " % self.service_name, self.__start)
+        self.step("configuring %s to start on boot" % self.service_name, self.__enable)
+        self.start_creation("Configuring %s" % self.service_name)
+
+    def __start(self):
+        self.backup_state("running", self.is_running())
+        self.restart()
+
+    def __enable(self):
+        self.backup_state("enabled", self.is_enabled())
+        self.chkconfig_on()
+
+    def uninstall(self):
+        running = self.restore_state("running")
+        enabled = not self.restore_state("enabled")
+
+        if not running is None and not running:
+            self.stop()
+        if not enabled is None and not enabled:
+            self.chkconfig_off()

ipa-server/ipaserver/webguiinstance.py

@@ -1,46 +0,0 @@
-# Authors: Karl MacMillan <kmacmillan@mentalrootkit.com>
-#
-# Copyright (C) 2007  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; version 2 or later
-#
-# 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, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-#
-
-import service
-
-class WebGuiInstance(service.Service):
-    def __init__(self):
-        service.Service.__init__(self, "ipa_webgui")
-
-    def create_instance(self):
-        self.step("starting ipa_webgui", self.__start)
-        self.step("configuring ipa_webgui to start on boot", self.__enable)
-        self.start_creation("Configuring ipa_webgui")
-
-    def __start(self):
-        self.backup_state("running", self.is_running())
-        self.restart()
-
-    def __enable(self):
-        self.backup_state("enabled", self.is_enabled())
-        self.chkconfig_on()
-
-    def uninstall(self):
-        running = self.restore_state("running")
-        enabled = not self.restore_state("enabled")
-
-        if not running is None and not running:
-            self.stop()
-        if not enabled is None and not enabled:
-            self.chkconfig_off()