Introduce ipa control script that reads configuration off ldap

This replace the former ipactl script, as well as replace the current way ipa
components are started.

Instead of enabling each service in the system init scripts, enable only the
ipa script, and then let it start all components based on the configuration
read from the LDAP tree.

resolves: https://fedorahosted.org/freeipa/ticket/294

ipaserver/install/service.py

@@ -29,6 +29,13 @@ import base64
 import time
 import datetime
 
+SERVICE_LIST = {
+    'KDC':('krb5kdc', 10),
+    'KPASSWD':('ipa_kpasswd', 20),
+    'DNS':('named', 30),
+    'HTTP':('httpd', 40),
+    'CA':('pki_cad', 50)
+}
 
 def stop(service_name, instance_name=""):
     ipautil.run(["/sbin/service", service_name, "stop", instance_name])
@@ -263,8 +270,44 @@ class Service:
 
         self.steps = []
 
+    def __get_conn(self, dm_password):
+        try:
+            conn = ipaldap.IPAdmin("127.0.0.1")
+            conn.simple_bind_s("cn=directory manager", dm_password)
+        except Exception, e:
+            logging.critical("Could not connect to the Directory Server on %s: %s" % (self.fqdn, str(e)))
+            raise e
+
+        return conn
+
+    def ldap_enable(self, name, fqdn, dm_password, ldap_suffix):
+        self.chkconfig_off()
+        conn = self.__get_conn(dm_password)
+
+        entry_name = "cn=%s,cn=%s,%s,%s" % (name, fqdn,
+                                            "cn=masters,cn=ipa,cn=etc",
+                                            ldap_suffix)
+        order = SERVICE_LIST[name][1]
+        entry = ipaldap.Entry(entry_name)
+        entry.setValues("objectclass",
+                        "nsContainer", "ipaConfigObject")
+        entry.setValues("cn", name)
+        entry.setValues("ipaconfigstring",
+                        "enabledService", "startOrder " + str(order))
+
+        try:
+            conn.add_s(entry)
+        except ldap.ALREADY_EXISTS:
+            logging.critical("failed to add %s Service startup entry" % name)
+            raise e
+
 class SimpleServiceInstance(Service):
-    def create_instance(self):
+    def create_instance(self, gensvc_name=None, fqdn=None, dm_password=None, ldap_suffix=None):
+        self.gensvc_name = gensvc_name
+        self.fqdn = fqdn
+        self.dm_password = dm_password
+        self.suffix = ldap_suffix
+
         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)
@@ -276,7 +319,11 @@ class SimpleServiceInstance(Service):
     def __enable(self):
         self.chkconfig_add()
         self.backup_state("enabled", self.is_enabled())
-        self.chkconfig_on()
+        if self.gensvc_name == None:
+            self.chkconfig_on()
+        else:
+            self.ldap_enable(self.gensvc_name, self.fqdn,
+                             self.dm_password, self.suffix)
 
     def uninstall(self):
         if self.is_configured():