added logs in migrate.py

Dockerfile

 
 RUN rm -rf /var/log/*
 
+RUN touch /var/log/migrate.py.logs && chmod 777 /var/log/migrate.py.logs
+
 VOLUME "/var/lib/postgresql/backup"

migrate.py

 import re
 import distutils.version
 import subprocess
+import datetime
 
 
 def file_runner_pgsql(folder, file):
         if file.startswith('%s_' % (version)):
             run_file(folder, file, no_run, file_runners)
 
-def run_migrations(folder, version_from, version_to, no_run, file_runners):
+def run_migrations(folder, version_from, version_to, no_run, file_runners, log_file):
     files = list_files(folder)
     versions = list_versions(files)
 
         print('Not running because --no-run was specified')
 
     if version_from is None:
-        print('Initialising from %s (inclusive) to %s (inclusive)' % (versions[0], version_to))
+        msg = 'Initialising from %s (inclusive) to %s (inclusive)' % (versions[0], version_to)
     else:
-        print('Migrating from %s (exclusive) to %s (inclusive)' % (version_from, version_to))
+        msg = 'Migrating from %s (exclusive) to %s (inclusive)' % (version_from, version_to)
+
+    print(msg)
+
+    if not no_run:
+        try:
+            with open(log_file, "a") as f:
+                f.write('%s: %s in %s\n' % (datetime.datetime.now(), msg, folder))
+        except Exception as e:
+            print('Failed to write logs in %: %s' % (log_file, e))
 
     version_from_obj = distutils.version.StrictVersion('0.0.0' if version_from is None else version_from)
     version_to_obj = distutils.version.StrictVersion(version_to)
     parser.add_argument('--no-run', dest='no_run', default=False, action='store_true', help='Do not run migration, just print')
     parser.add_argument('--version-from', dest='version_from', default=None, help='Current version, required if using --migrate, can not be used --init')
     parser.add_argument('--version-to', dest='version_to', default=None, help='Final version, default to last available version is not given')
+    parser.add_argument('--log-file', dest='log_file', default='/var/lib/postgresql/data/migrate.py.log', help='File to log migrations')
 
     args = parser.parse_args()
 
         if args.version_from is not None:
             print('--version-from can not be used with --init')
             return 64
-        return run_migrations(args.folder, None, args.version_to, args.no_run, file_runners)
+        return run_migrations(args.folder, None, args.version_to, args.no_run, file_runners, args.log_file)
     elif args.is_migrate:
         if args.version_from is None:
             print('--version-from is required. Use --init to run all migrations')
             return 64
-        return run_migrations(args.folder, args.version_from, args.version_to, args.no_run, file_runners)
+        return run_migrations(args.folder, args.version_from, args.version_to, args.no_run, file_runners, args.log_file)
     else:
         print('Missing --init or --migrate')
         return 64