Add logging facility

management/backup.py

@@ -11,12 +11,17 @@
 import os, os.path, shutil, glob, re, datetime
 import dateutil.parser, dateutil.relativedelta, dateutil.tz
 import rtyaml
+import logging
 
 from utils import exclusive_process, load_environment, shell, wait_for_service
 
 # Root folder
 backup_root = os.path.join(load_environment()["STORAGE_ROOT"], 'backup')
 
+# Setup logging
+log_path = os.path.join(backup_root, 'backup.log')
+logging.basicConfig(filename=log_path, format='%(levelname)s at %(asctime)s: %(message)s')
+
 # Default settings
 # min_age_in_days is the minimum amount of days a backup will be kept before
 # it is eligble to be removed. Backups might be kept much longer if there's no
@@ -236,6 +241,9 @@ def perform_backup(full_backup):
 			"--allow-source-mismatch"
 			],
 			get_env())
+		logging.info("Backup successful")
+	except Exception as e:
+		logging.warn("Backup failed: {0}".format(e))
 	finally:
 		# Start services again.
 		shell('check_call', ["/usr/sbin/service", "dovecot", "start"])
@@ -247,29 +255,35 @@ def perform_backup(full_backup):
 
 	# Remove old backups. This deletes all backup data no longer needed
 	# from more than 3 days ago.
-	shell('check_call', [
-		"/usr/bin/duplicity",
-		"remove-older-than",
-		"%dD" % config["min_age_in_days"],
-		"--archive-dir", backup_cache_dir,
-		"--force",
-		config["target"]
-		],
-		get_env())
+	try:
+		shell('check_call', [
+			"/usr/bin/duplicity",
+			"remove-older-than",
+			"%dD" % config["min_age_in_days"],
+			"--archive-dir", backup_cache_dir,
+			"--force",
+			config["target"]
+			],
+			get_env())
+	except Exception as e:
+		logging.warn("Removal of old backups failed: {0}".format(e))
 
 	# From duplicity's manual:
 	# "This should only be necessary after a duplicity session fails or is
 	# aborted prematurely."
 	# That may be unlikely here but we may as well ensure we tidy up if
 	# that does happen - it might just have been a poorly timed reboot.
-	shell('check_call', [
-		"/usr/bin/duplicity",
-		"cleanup",
-		"--archive-dir", backup_cache_dir,
-		"--force",
-		config["target"]
-		],
-		get_env())
+	try:
+		shell('check_call', [
+			"/usr/bin/duplicity",
+			"cleanup",
+			"--archive-dir", backup_cache_dir,
+			"--force",
+			config["target"]
+			],
+			get_env())
+	except Exception as e:
+		logging.warn("Cleanup of backups failed: {0}".format(e))
 
 	# Change ownership of backups to the user-data user, so that the after-bcakup
 	# script can access them.
@@ -336,6 +350,16 @@ def get_backup_config():
 	merged_config.update(config)
 
 	return config
+	
+def get_backup_log():
+	try:
+		fileHandle = open(log_path, 'r')
+		log = fileHandle.read()
+		fileHandle.close()
+	except:
+		log = ""
+
+	return log
 
 def write_backup_config(newconfig):
 	with open(os.path.join(backup_root, 'custom.yaml'), "w") as f:

management/daemon.py

@@ -4,7 +4,7 @@ import os, os.path, re, json
 
 from functools import wraps
 
-from flask import Flask, request, render_template, abort, Response, send_from_directory
+from flask import Flask, request, render_template, abort, Response, send_from_directory, jsonify
 
 import auth, utils
 from mailconfig import get_mail_users, get_mail_users_ex, get_admins, add_mail_user, set_mail_password, remove_mail_user
@@ -399,14 +399,14 @@ def do_updates():
 @app.route('/system/backup/status')
 @authorized_personnel_only
 def backup_status():
-	from backup import backup_status
-	return json_response(backup_status(env))
+	from backup import backup_status, get_backup_log
+	return jsonify(backups=backup_status(env), log=get_backup_log())
 
 @app.route('/system/backup/config', methods=["GET"])
 @authorized_personnel_only
 def backup_get_custom():
 	from backup import get_backup_config
-	return json_response(get_backup_config())
+	return jsonify(get_backup_config())
 
 @app.route('/system/backup/config', methods=["POST"])
 @authorized_personnel_only

management/templates/system-backup.html

@@ -68,6 +68,11 @@
   <tbody>
   </tbody>
 </table>
+
+<h3>Backup logs</h3>
+<pre id="backup-log"></pre>
+
+
 <script>
 
 function toggle_form() {
@@ -104,22 +109,24 @@ function show_system_backup() {
     "GET",
     { },
     function(r) {
-      $('#backup-location').text(r.directory);
-      $('#backup-encpassword-file').text(r.encpwfile);
+      var status = r.backups;
+      var log = r.log;
+      $('#backup-location').text(status.directory);
+      $('#backup-encpassword-file').text(status.encpwfile);
 
       $('#backup-status tbody').html("");
       var total_disk_size = 0;
 
-      if (r.backups.length == 0) {
+      if (status.backups.length == 0) {
         var tr = $('<tr><td colspan="3">No backups have been made yet.</td></tr>');
         $('#backup-status tbody').append(tr);
       }
 
-      for (var i = 0; i < r.backups.length; i++) {
-        var b = r.backups[i];
+      for (var i = 0; i < status.backups.length; i++) {
+        var b = status.backups[i];
         var tr = $('<tr/>');
         if (b.full) tr.addClass("full-backup");
-        tr.append( $('<td/>').text(b.date_str + " " + r.tz) );
+        tr.append( $('<td/>').text(b.date_str + " " + status.tz) );
         tr.append( $('<td/>').text(b.date_delta + " ago") );
         tr.append( $('<td/>').text(b.full ? "full" : "increment") );
         tr.append( $('<td style="text-align: right"/>').text( nice_size(b.size)) );
@@ -133,6 +140,8 @@ function show_system_backup() {
       }
 
       $('#backup-total-size').text(nice_size(total_disk_size));
+      
+      $('#backup-log').text(log || 'No backup logs yet');
     })
 }