I tried installing sentinel from the repo, but it doesn't look like it's working, this is the output of the python script:
2017-12-02 21:27:07 [info]: SCHEMA_VERSION (code) = [20170111-1]
2017-12-02 21:27:07 [info]: DB_SCHEMA_VERSION = [20170111-1]
('SELECT "t1"."id", "t1"."name", "t1"."value", "t1"."created_at", "t1"."updated_at" FROM "settings" AS t1 WHERE ("t1"."name" = ?) LIMIT 1 OFFSET 0', [u'__transient_NEXT_SENTINEL_CHECK_AT'])
2017-12-02 21:27:07 current_time = 1512250027
2017-12-02 21:27:07 next_run_time = 1512250487
2017-12-02 21:27:07 Not yet time for an object sync/vote, moving on.
('SELECT "t1"."id", "t1"."name", "t1"."value", "t1"."created_at", "t1"."updated_at" FROM "settings" AS t1 WHERE ("t1"."name" = ?) LIMIT 1 OFFSET 0', [u'__transient_SENTINEL_RUNNING'])
('DELETE FROM "settings" WHERE ("id" = ?)', [84])
('SELECT "t1"."id", "t1"."name", "t1"."value", "t1"."created_at", "t1"."updated_at" FROM "settings" AS t1 WHERE ("t1"."name" = ?) LIMIT 1 OFFSET 0', [u'__transient_SENTINEL_RUNNING'])
nothiing happens after running it, MN just keeps sitting there with WATCHDOG_EXPIRED status