init replica set

docker/staging/docker-compose.yaml

@@ -55,5 +55,6 @@ services:
     volumes:
       - ./mongo/data:/data/db
       - ./mongo/init/create_users.js:/docker-entrypoint-initdb.d/create_users.js
+      - ./mongo/init/init_replica_set.js:/docker-entrypoint-initdb.d/init_replica_set.js
     env_file:
       - mongo.env

docker/staging/mongo/init/init_replica_set.js

@@ -0,0 +1,15 @@
+try {
+  const status = rs.status();
+  printjson(status);
+} catch (e) {
+  if (e.codeName === "NotYetInitialized") {
+    print("Replica set not initialized. Initiating...");
+    rs.initiate({
+      _id: "rs0",
+      members: [{ _id: 0, host: "mongodb:27017" }],
+    });
+  } else {
+    print("Unexpected error during rs.status():");
+    printjson(e);
+  }
+}