Refresh resolvers after DNS install

Server framework calls acutil.res_send() to send DNS queries used
for various DNS tests. However, once acutil is imported it does
not change its list of configured resolvers even when
/etc/resolv.conf is changed. This may lead to unexpected
resolution issues.

We should at least reload httpd when we change /etc/resolv.conf to
point to FreeIPA nameserver to force a new import of acutil and
thus workaround this bug until it is resolved in authconfig.

https://fedorahosted.org/freeipa/ticket/2481

install/tools/ipa-dns-install

@@ -22,7 +22,7 @@
 import traceback
 
 from ipaserver.plugins.ldap2 import ldap2
-from ipaserver.install import bindinstance, ntpinstance
+from ipaserver.install import service, bindinstance, ntpinstance, httpinstance
 from ipaserver.install.installutils import *
 from ipaserver.install import installutils
 from ipapython import version
@@ -223,6 +223,11 @@ def main():
                zone_notif=options.zone_notif)
     bind.create_instance()
 
+    # Restart http instance to make sure acutil has the right resolver
+    # https://bugzilla.redhat.com/show_bug.cgi?id=800368
+    http = httpinstance.HTTPInstance(fstore)
+    service.print_msg("Restarting the web server")
+    http.restart()
 
     print "=============================================================================="
     print "Setup complete"

install/tools/ipa-replica-install

@@ -456,13 +456,13 @@ def main():
     service.print_msg("Restarting the KDC")
     krb.restart()
 
+    if options.setup_dns:
+        install_bind(config, options)
+
     # Restart httpd to pick up the new IPA configuration
     service.print_msg("Restarting the web server")
     http.restart()
 
-    if options.setup_dns:
-        install_bind(config, options)
-
     # Call client install script
     try:
         args = ["/usr/sbin/ipa-client-install", "--on-master", "--unattended", "--domain", config.domain_name, "--server", config.host_name, "--realm", config.realm_name]

install/tools/ipa-server-install

@@ -1009,10 +1009,6 @@ def main():
     service.print_msg("Restarting the KDC")
     krb.restart()
 
-    # Restart httpd to pick up the new IPA configuration
-    service.print_msg("Restarting the web server")
-    http.restart()
-
     # Create a BIND instance
     bind = bindinstance.BindInstance(fstore, dm_password)
     bind.setup(host_name, ip_address, realm_name, domain_name, dns_forwarders,
@@ -1026,6 +1022,10 @@ def main():
     else:
         bind.create_sample_bind_zone()
 
+    # Restart httpd to pick up the new IPA configuration
+    service.print_msg("Restarting the web server")
+    http.restart()
+
     # Set the admin user kerberos password
     ds.change_admin_password(admin_password)