Update several auto-created id fields/sequences to be BIGINT.

fixes #2080.

(cherry picked from commit 76528ef)

Author: ggainey

CHANGES/2080.bugfix

@@ -0,0 +1,3 @@
+Altered several id-fields and their related sequences.
+
+INTEGER AutoField sequences can "run out" on large/old instances, update to BIGINT.

pulp_container/app/__init__.py

@@ -1,4 +1,21 @@
 from pulpcore.plugin import PulpPluginAppConfig
+from django.db import connection
+from django.db.models.signals import post_migrate
+
+update_sequences_to_bigint = """
+ALTER TABLE container_blobmanifest ALTER COLUMN id TYPE bigint;
+ALTER TABLE container_manifestlistmanifest ALTER COLUMN id TYPE bigint;
+ALTER TABLE container_containerpushrepository_pending_blobs ALTER COLUMN id TYPE bigint;
+ALTER TABLE container_containerpushrepository_pending_manifests ALTER COLUMN id TYPE bigint;
+ALTER TABLE container_containerrepository_pending_manifests ALTER COLUMN id TYPE bigint;
+ALTER TABLE container_containerrepository_pending_blobs ALTER COLUMN id TYPE bigint;
+ALTER SEQUENCE container_blobmanifest_id_seq AS BIGINT;
+ALTER SEQUENCE container_manifestlistmanifest_id_seq AS BIGINT;
+ALTER SEQUENCE container_containerpushrepository_pending_blobs_id_seq AS BIGINT;
+ALTER SEQUENCE container_containerpushrepository_pending_manifests_id_seq AS BIGINT;
+ALTER SEQUENCE container_containerrepository_pending_blobs_id_seq AS BIGINT;
+ALTER SEQUENCE container_containerrepository_pending_manifests_id_seq AS BIGINT;
+"""
 
 
 class PulpContainerPluginAppConfig(PulpPluginAppConfig):
@@ -9,5 +26,12 @@ class PulpContainerPluginAppConfig(PulpPluginAppConfig):
     version = "2.20.7.dev"
     python_package_name = "pulp-container"
 
+    @staticmethod
+    def update_sequences(sender, **kwargs):
+        """Update database sequences to bigint type after migrations."""
+        with connection.cursor() as cursor:
+            cursor.execute(update_sequences_to_bigint)
+
     def ready(self):
         super().ready()
+        post_migrate.connect(PulpContainerPluginAppConfig.update_sequences, sender=self)