[DPE-4816] Add jinja2 as a dependency (#276)

* Add jinja2 as a dependency

* Bump libs

* Increate connections for landscape test

lib/charms/postgresql_k8s/v0/postgresql.py

@@ -36,7 +36,7 @@
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 29
+LIBPATCH = 30
 
 INVALID_EXTRA_USER_ROLE_BLOCKING_MESSAGE = "invalid role(s) for extra user roles"
 
@@ -79,6 +79,10 @@ class PostgreSQLEnableDisableExtensionError(Exception):
     """Exception raised when enabling/disabling an extension fails."""
 
 
+class PostgreSQLGetLastArchivedWALError(Exception):
+    """Exception raised when retrieving last archived WAL fails."""
+
+
 class PostgreSQLGetPostgreSQLVersionError(Exception):
     """Exception raised when retrieving PostgreSQL version fails."""
 
@@ -383,6 +387,16 @@ def _generate_database_privileges_statements(
                 )
         return statements
 
+    def get_last_archived_wal(self) -> str:
+        """Get the name of the last archived wal for the current PostgreSQL cluster."""
+        try:
+            with self._connect_to_database() as connection, connection.cursor() as cursor:
+                cursor.execute("SELECT last_archived_wal FROM pg_stat_archiver;")
+                return cursor.fetchone()[0]
+        except psycopg2.Error as e:
+            logger.error(f"Failed to get PostgreSQL last archived WAL: {e}")
+            raise PostgreSQLGetLastArchivedWALError()
+
     def get_postgresql_text_search_configs(self) -> Set[str]:
         """Returns the PostgreSQL available text search configs.
 

pyproject.toml

@@ -23,6 +23,7 @@ cryptography = "^42.0.8"
 jsonschema = "^4.22.0"
 psycopg2 = "^2.9.9"
 psycopg = {extras = ["c"], version = "^3.2.1"}
+jinja2 = "^3.1.4"
 
 [tool.poetry.group.charm-libs.dependencies]
 # data_platform_libs/v0/data_interfaces.py
@@ -60,7 +61,6 @@ optional = true
 coverage = {extras = ["toml"], version = "^7.5.4"}
 pytest = "^8.2.2"
 pytest-asyncio = "*"
-jinja2 = "^3.1.4"
 parameterized = "^0.9.0"
 
 [tool.poetry.group.integration]

tests/integration/relations/test_db_admin.py

@@ -38,7 +38,7 @@ async def test_landscape_scalable_bundle_db(ops_test: OpsTest, pgb_charm_jammy:
         db_units=DATABASE_UNITS,
         pgb_series="jammy",
         pg_config={"profile": "testing"},
-        pgb_config={"max_db_connections": "20", "pool_mode": "transaction"},
+        pgb_config={"max_db_connections": "40", "pool_mode": "transaction"},
     )
 
     # Deploy and test the Landscape Scalable bundle (using this PostgreSQL charm).