refactor: env ceph region variable

Author: KirylSAP

apps/aurora-portal/.env.example

@@ -2,7 +2,11 @@ IDENTITY_ENDPOINT="http://localhost:8080/identity/v3/"
 DEFAULT_ENDPOINT_INTERFACE="public"
 PORT="4001"
 CEPH_S3_ENDPOINT="https://rgw.example.com"
-CEPH_REGION="default"
+# Ceph region identifier for AWS Signature V4 signing and LocationConstraint
+# SAP Converged Cloud examples:
+#   - Standard regions: ceph-objectstore-st1 + {region}
+# For other Ceph deployments, use your custom region identifier
+CEPH_REGION="ceph-objectstore-ec-st1-qa-de-1"
 IMAGE_METADATA_EXCLUDED_PROPERTIES="name,tags,visibility,protected,min_disk,min_ram,id,status,size,checksum,created_at,updated_at,created-at,updated-at,disk_format,container_format,file,schema,locations,self,direct_url,owner,virtual_size,kernel_id,ramdisk_id,os_hash_algo,os_hash_value,os-hash-algo,os-hash-value,stores,owner_specified.openstack.md5,owner_specified.openstack.sha256,owner_specified.openstack.object"
 
 # E2E tests

apps/aurora-portal/src/server/Storage/cephProcedure.ts

@@ -45,23 +45,11 @@ function resolveS3Config(ctx: AuroraPortalContext): { endpoint: string; region:
       throw new Error("Region not found in Ceph service endpoints")
     }
 
-    // Construct Ceph-compatible region identifier using the pattern from Go SDK / Terraform.
-    // Standard format: ceph-objectstore-st1-{region} (e.g., ceph-objectstore-st1-eu-de-2)
-    // Exception: qa-de-1 uses "ec" prefix for historical reasons (ceph-objectstore-ec-st1-qa-de-1)
-    //
-    // This identifier is used for:
-    //   1. AWS Signature V4 request signing (region field in Authorization header)
-    //   2. LocationConstraint in CreateBucket API calls
-    //
-    // See: https://documentation.global.cloud.sap/docs/customer/storage/obj-v2-ceph/ceph-storage-options/
-    const QA_DE_1_REGION = "qa-de-1"
-    const CEPH_REGION_PREFIX_STANDARD = "ceph-objectstore-st1"
-    const CEPH_REGION_PREFIX_EC = "ceph-objectstore-ec-st1"
-
-    const region =
-      openstackRegion === QA_DE_1_REGION
-        ? `${CEPH_REGION_PREFIX_EC}-${openstackRegion}`
-        : `${CEPH_REGION_PREFIX_STANDARD}-${openstackRegion}`
+    if (!process.env.CEPH_REGION) {
+      throw new Error("CEPH_REGION environment variable is required. ")
+    }
+
+    const region = process.env.CEPH_REGION
 
     return { endpoint: baseEndpoint, region }
   } catch (error) {