Add copy-schema-to-ca for RHEL6 to contrib/

Fixed version that works on RHEL6. Adding it to contrib to avoid loosing it.

https://pagure.io/freeipa/issue/6540

Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>

contrib/copy-schema-to-ca-RHEL6.py

@@ -0,0 +1,118 @@
+#! /usr/bin/python2
+
+"""Copy the IPA schema to the CA directory server instance
+
+You need to run this script to prepare a 2.2 or 3.0 IPA master for
+installation of a 3.1 replica.
+
+Once a 3.1 replica is in the domain, every older CA master will emit schema
+replication errors until this script is run on it.
+
+"""
+
+# DO NOT TOUCH THIS CODE, IT MUST BE COMPATIBLE WITH RHEL6
+# disable pylint because current codebase didn't match RHEL6 code
+# pylint: disable=all
+
+import os
+import sys
+import pwd
+import shutil
+
+from hashlib import sha1
+
+from ipapython import ipautil
+from ipapython.ipa_log_manager import root_logger, standard_logging_setup
+from ipaserver.install.dsinstance import schema_dirname
+from ipalib import api
+
+# oh dear, this is an old IPA (3.0+)
+from ipaserver.install.dsinstance import DS_USER
+from ipaserver.install.cainstance import PKI_USER
+from ipapython import services
+
+SERVERID = "PKI-IPA"
+SCHEMA_FILENAMES = (
+    "60kerberos.ldif",
+    "60samba.ldif",
+    "60ipaconfig.ldif",
+    "60basev2.ldif",
+    "60basev3.ldif",
+    "60ipadns.ldif",
+    "61kerberos-ipav3.ldif",
+    "65ipacertstore.ldif",
+    "65ipasudo.ldif",
+    "70ipaotp.ldif",
+    "05rfc2247.ldif",
+)
+
+
+def _sha1_file(filename):
+    with open(filename, 'rb') as f:
+        return sha1(f.read()).hexdigest()
+
+
+def add_ca_schema():
+    """Copy IPA schema files into the CA DS instance
+    """
+    pki_pent = pwd.getpwnam(PKI_USER)
+    ds_pent = pwd.getpwnam(DS_USER)
+    for schema_fname in SCHEMA_FILENAMES:
+        source_fname = os.path.join(ipautil.SHARE_DIR, schema_fname)
+        target_fname = os.path.join(schema_dirname(SERVERID), schema_fname)
+        if not os.path.exists(source_fname):
+            root_logger.debug('File does not exist: %s', source_fname)
+            continue
+        if os.path.exists(target_fname):
+            target_sha1 = _sha1_file(target_fname)
+            source_sha1 = _sha1_file(source_fname)
+            if target_sha1 != source_sha1:
+                target_size = os.stat(target_fname).st_size
+                source_size = os.stat(source_fname).st_size
+                root_logger.info('Target file %s exists but the content is '
+                                 'different', target_fname)
+                root_logger.info('\tTarget file: sha1: %s, size: %s B',
+                                 target_sha1, target_size)
+                root_logger.info('\tSource file: sha1: %s, size: %s B',
+                                 source_sha1, source_size)
+                if not ipautil.user_input("Do you want replace %s file?" %
+                                          target_fname, True):
+                    continue
+
+            else:
+                root_logger.info(
+                    'Target exists, not overwriting: %s', target_fname)
+                continue
+        try:
+            shutil.copyfile(source_fname, target_fname)
+        except IOError as e:
+            root_logger.warning('Could not install %s: %s', target_fname, e)
+        else:
+            root_logger.info('Installed %s', target_fname)
+        os.chmod(target_fname, 0o440)    # read access for dirsrv user/group
+        os.chown(target_fname, pki_pent.pw_uid, ds_pent.pw_gid)
+
+
+def restart_pki_ds():
+    """Restart the CA DS instance to pick up schema changes
+    """
+    root_logger.info('Restarting CA DS')
+    services.service('dirsrv').restart(SERVERID)
+
+
+def main():
+    if os.getegid() != 0:
+        sys.exit("Must be root to run this script")
+    standard_logging_setup(verbose=True)
+
+    # In 3.0, restarting needs access to api.env
+    api.bootstrap_with_global_options(context='server')
+
+    add_ca_schema()
+    restart_pki_ds()
+
+    root_logger.info('Schema updated successfully')
+
+
+if __name__ == '__main__':
+    main()