mongo migrate: update to mongo 7.0 + set feature compatibility.

ansible/roles/digital_ocean/setup/tasks/main.yml

@@ -21,7 +21,7 @@
   register: db_check
 
 - name: d_ocean | db | create mongodb database
-  ansible.builtin.command: doctl databases create {{ db_name }} --region {{ droplet_region }} --engine mongodb --version 6 --output json
+  ansible.builtin.command: doctl databases create {{ db_name }} --region {{ droplet_region }} --engine mongodb --version 7 --output json
   async: 1800
   poll: 60
   register: db_create

backend/btrixcloud/db.py

@@ -40,6 +40,8 @@
 
 CURR_DB_VERSION = "0054"
 
+MIN_DB_VERSION = 7.0
+
 
 # ============================================================================
 def resolve_db_url() -> str:
@@ -75,6 +77,25 @@ def init_db() -> tuple[AsyncIOMotorClient, AsyncIOMotorDatabase]:
     return client, mdb
 
 
+# ============================================================================
+async def ensure_feature_version(client: AsyncIOMotorClient):
+    """ensures the minimum feature compatibility version is set"""
+    admin = client["admin"]
+
+    fcv_status = await admin.command(
+        {"getParameter": 1, "featureCompatibilityVersion": 1}
+    )
+    version = fcv_status.get("featureCompatibilityVersion", {}).get("version")
+
+    if float(version) < MIN_DB_VERSION:
+        print(f"mongodb: updating feature compatibility {version} -> {MIN_DB_VERSION}")
+        await admin.command(
+            {"setFeatureCompatibilityVersion": str(MIN_DB_VERSION), "confirm": True}
+        )
+    else:
+        print(f"mongodb: feature compatibility {version} >= {MIN_DB_VERSION}")
+
+
 # ============================================================================
 async def ping_db(mdb) -> None:
     """run in loop until db is up, set db_inited['inited'] property to true"""

backend/btrixcloud/main_migrations.py

@@ -5,7 +5,7 @@
 import asyncio
 
 from .ops import init_ops
-from .db import update_and_prepare_db
+from .db import update_and_prepare_db, ensure_feature_version
 
 
 # ============================================================================
@@ -38,10 +38,12 @@ async def main() -> int:
         file_ops,
         crawl_log_ops,
         crawl_manager,
-        _,
+        dbclient,
         mdb,
     ) = init_ops()
 
+    await ensure_feature_version(dbclient)
+
     await update_and_prepare_db(
         mdb,
         user_manager,

chart/values.yaml

@@ -223,7 +223,7 @@ mongo_local: true
 
 mongo_host: "local-mongo"
 
-mongo_image: "docker.io/library/mongo:6.0.5"
+mongo_image: "docker.io/library/mongo:7.0"
 mongo_pull_policy: "IfNotPresent"
 
 mongo_cpu: "12m"