core: fix backup task not being registered, add fallback for api to remove info on ImportError

celery only discovers tasks from installed apps, which `lib` is not, hence the schedule didn't trigger it

passbook/admin/api/tasks.py

@@ -50,15 +50,23 @@ class TaskViewSet(ViewSet):
         task = TaskInfo.by_name(pk)
         if not task:
             raise Http404
+        try:
             task_module = import_module(task.task_call_module)
             task_func = getattr(task_module, task.task_call_func)
             task_func.delay(*task.task_call_args, **task.task_call_kwargs)
             messages.success(
                 self.request,
-            _("Successfully re-scheduled Task %(name)s!" % {"name": task.task_name}),
+                _(
+                    "Successfully re-scheduled Task %(name)s!"
+                    % {"name": task.task_name}
+                ),
             )
             return Response(
                 {
                     "successful": True,
                 }
             )
+        except ImportError:
+            # if we get an import error, the module path has probably changed
+            task.delete()
+            return Response({"successful": False})

passbook/admin/templates/administration/task/list.html

@@ -21,7 +21,7 @@
                 <tr role="row">
                     <th role="columnheader" scope="col">{% trans 'Identifier' %}</th>
                     <th role="columnheader" scope="col">{% trans 'Description' %}</th>
-                    <th role="columnheader" scope="col">{% trans 'Last Status' %}</th>
+                    <th role="columnheader" scope="col">{% trans 'Last Run' %}</th>
                     <th role="columnheader" scope="col">{% trans 'Status' %}</th>
                     <th role="columnheader" scope="col">{% trans 'Messages' %}</th>
                     <th role="cell"></th>

passbook/api/v2/urls.py

@@ -68,6 +68,9 @@ router.register("core/tokens", TokenViewSet)
 router.register("outposts/outposts", OutpostViewSet)
 router.register("outposts/proxy", OutpostConfigViewSet)
 
+router.register("flows/instances", FlowViewSet)
+router.register("flows/bindings", FlowStageBindingViewSet)
+
 router.register("crypto/certificatekeypairs", CertificateKeyPairViewSet)
 
 router.register("audit/events", EventViewSet)
@@ -114,9 +117,6 @@ router.register("stages/user_login", UserLoginStageViewSet)
 router.register("stages/user_logout", UserLogoutStageViewSet)
 router.register("stages/user_write", UserWriteStageViewSet)
 
-router.register("flows/instances", FlowViewSet)
-router.register("flows/bindings", FlowStageBindingViewSet)
-
 router.register("stages/dummy", DummyStageViewSet)
 router.register("policies/dummy", DummyPolicyViewSet)
 

passbook/core/tasks.py

@@ -1,4 +1,11 @@
 """passbook core tasks"""
+from datetime import datetime
+from io import StringIO
+
+from boto3.exceptions import Boto3Error
+from botocore.exceptions import BotoCoreError, ClientError
+from django.contrib.humanize.templatetags.humanize import naturaltime
+from django.core import management
 from django.utils.timezone import now
 from structlog import get_logger
 
@@ -24,3 +31,24 @@ def clean_expired_models(self: MonitoredTask):
         LOGGER.debug("Deleted expired models", model=cls, amount=amount)
         messages.append(f"Deleted {amount} expired {cls._meta.verbose_name_plural}")
     self.set_status(TaskResult(TaskResultStatus.SUCCESSFUL, messages))
+
+
+@CELERY_APP.task(bind=True, base=MonitoredTask)
+def backup_database(self: MonitoredTask):  # pragma: no cover
+    """Database backup"""
+    try:
+        start = datetime.now()
+        out = StringIO()
+        management.call_command("dbbackup", quiet=True, stdout=out)
+        self.set_status(
+            TaskResult(
+                TaskResultStatus.SUCCESSFUL,
+                [
+                    f"Successfully finished database backup {naturaltime(start)}",
+                    out.getvalue(),
+                ],
+            )
+        )
+        LOGGER.info("Successfully backed up database.")
+    except (IOError, BotoCoreError, ClientError, Boto3Error) as exc:
+        self.set_status(TaskResult(TaskResultStatus.ERROR).with_error(exc))

passbook/lib/tasks.py

@@ -62,6 +62,10 @@ class TaskInfo:
         """Get TaskInfo Object by name"""
         return cache.get(f"task_{name}")
 
+    def delete(self):
+        """Delete task info from cache"""
+        return cache.delete(f"task_{self.task_name}")
+
     def save(self):
         """Save task into cache"""
         key = f"task_{self.task_name}"

passbook/lib/tasks/backup.py

@@ -1,34 +0,0 @@
-"""Database backup task"""
-from datetime import datetime
-from io import StringIO
-
-from botocore.exceptions import BotoCoreError, ClientError
-from django.contrib.humanize.templatetags.humanize import naturaltime
-from django.core import management
-from structlog import get_logger
-
-from passbook.lib.tasks import MonitoredTask, TaskResult, TaskResultStatus
-from passbook.root.celery import CELERY_APP
-
-LOGGER = get_logger()
-
-
-@CELERY_APP.task(bind=True, base=MonitoredTask)
-def backup_database(self: MonitoredTask):  # pragma: no cover
-    """Database backup"""
-    try:
-        start = datetime.now()
-        out = StringIO()
-        management.call_command("dbbackup", quiet=True, stdout=out)
-        self.set_status(
-            TaskResult(
-                TaskResultStatus.SUCCESSFUL,
-                [
-                    f"Successfully finished database backup {naturaltime(start)}",
-                    out.getvalue(),
-                ],
-            )
-        )
-        LOGGER.info("Successfully backed up database.")
-    except (IOError, BotoCoreError, ClientError) as exc:
-        self.set_status(TaskResult(TaskResultStatus.ERROR).with_error(exc))

passbook/root/settings.py

@@ -273,7 +273,7 @@ CELERY_BEAT_SCHEDULE = {
         "options": {"queue": "passbook_scheduled"},
     },
     "db_backup": {
-        "task": "passbook.lib.tasks.backup.backup_database",
+        "task": "passbook.core.tasks.backup_database",
         "schedule": crontab(minute=0, hour=0),
         "options": {"queue": "passbook_scheduled"},
     },