BiBiServ · jkrue · Feb 19, 2026 · Feb 2, 2026 · Feb 2, 2026 · Feb 3, 2026
diff --git a/bibigrid/core/actions/create.py b/bibigrid/core/actions/create.py
@@ -338,13 +338,14 @@ def add_volume_device_info_to_instance(self, provider, server, instance):
                                       server_volume["id"] == volume["id"]), None)
                 if not server_volume:
                     raise RuntimeError(
-                        f"Created server {server['name']} doesn't have attached volume {volume['name']}.")
+                        f"Created server {server['name']} doesn't have attached volume {volume.get('name')} "
+                        f"(volume_id:{volume.get('id')}).")
                 device = server_volume.get("device")
                 final_volumes.append({**volume, "device": device})
 
                 self.log.debug(f"Added Configuration: Instance {server['name']} has volume {volume['name']} "
-                               f"as device {device} that is going to be mounted to "
-                               f"{volume.get('mountPoint')}")
+                               f"(volume_id:{volume.get('id')}) "
+                               f"as device {device} (Mount Point {volume.get('mountPoint', 'Will Not Be Mounted')})")
 
             self.write_remote.append(
                 ({"volumes": final_volumes}, os.path.join(a_rp.HOST_VARS_FOLDER_REMOTE, f"{server['name']}.yaml"),
@@ -529,6 +530,7 @@ def create(self):  # pylint: disable=too-many-branches,too-many-statements
                     self.log.info("%s not found. Creating folder.", folder)
                     os.mkdir(folder)
             self.generate_keypair()
+            self.log.debug("Keypair generated")
             self.delete_old_vars()
             self.prepare_configurations()
             self.create_defaults()

diff --git a/bibigrid/core/actions/terminate.py b/bibigrid/core/actions/terminate.py
@@ -168,8 +168,9 @@ def delete_security_groups(provider, cluster_id, security_groups, log, timeout=5
         while not tmp_success:
             try:
                 tmp_success = provider.delete_security_group(security_group_name)
-            except ConflictException:
-                log.info(f"ConflictException on deletion attempt on {provider.cloud_specification['identifier']}.")
+            except ConflictException as exc:
+                log.info(f"ConflictException on deletion attempt on {provider.cloud_specification['identifier']}: "
+                         f"{exc}")
                 tmp_success = False
             if tmp_success:
                 break

diff --git a/bibigrid/core/utility/validate_configuration.py b/bibigrid/core/utility/validate_configuration.py
@@ -370,15 +370,16 @@ def check_instance_type_image_combination(self, instance_type, instance_image, p
     def _check_volume(self, provider, volume, count):
         success = True
         if volume.get("exists"):
-            if volume.get("name"):
-                volume_object = provider.get_volume_by_id_or_name(volume["name"])
+            volume_name_or_id = volume.get("id", volume.get("name"))
+            if volume_name_or_id:
+                volume_object = provider.get_volume_by_id_or_name(volume_name_or_id)
                 if volume_object:
                     self.log.debug(
-                        f"Found volume {volume['name']} on cloud "
+                        f"Found volume {volume_name_or_id} on cloud "
                         f"{provider.cloud_specification['identifier']}.")
                 else:
                     self.log.warning(
-                        f"Couldn't find volume {volume['name']} on cloud "
+                        f"Couldn't find volume {volume_name_or_id} on cloud "
                         f"{provider.cloud_specification['identifier']}. "
                         "No size added to resource requirements dict."
                     )

diff --git a/bibigrid/models/configuration.py b/bibigrid/models/configuration.py
@@ -201,6 +201,8 @@ class ConfigurationsModel(StrictModel):
     def split_master_and_other(cls, values):
         if isinstance(values, list):
             values = {"configurations": values}
+        if values.get("master"):
+            return values
         configs = values.get("configurations")
         if not configs:
             raise ValueError("Configurations list cannot be empty")

diff --git a/bibigrid/resources/cloud_node_requirements.yaml b/bibigrid/resources/cloud_node_requirements.yaml
@@ -1,6 +1,4 @@
 os_distro:
   ubuntu:
     os_versions:
-      - "24.04"
-      - "22.04"
-      - "20.04"
+      - "24.04"
diff --git a/bibigrid/resources/playbook/roles/bibigrid/handlers/main.yml b/bibigrid/resources/playbook/roles/bibigrid/handlers/main.yml
@@ -78,3 +78,10 @@
 - name: Apt update
   apt:
     update_cache: "yes"
+
+- name: Nvidia drivers installed
+  reboot:
+    reboot_timeout: 900
+    pre_reboot_delay: 5
+    post_reboot_delay: 20
+    test_command: nvidia-smi
diff --git a/bibigrid/resources/playbook/roles/bibigrid/tasks/001-apt.yaml b/bibigrid/resources/playbook/roles/bibigrid/tasks/001-apt.yaml
@@ -47,6 +47,7 @@
     state: "present"
 
 - name: Add zabbix repositories # noqa: line-length
+  when: enable_zabbix|default(false)|bool
   apt:
     # yamllint disable-line
     deb: "https://repo.zabbix.com/zabbix/7.0/ubuntu/pool/main/z/zabbix-release/zabbix-release_latest_7.0+{{ ansible_distribution | lower }}{{ ansible_distribution_version }}_all.deb"
@@ -66,5 +67,20 @@
     repo: 'deb https://apt.bi.denbi.de/repos/apt/{{ ansible_distribution_release | lower }} {{ ansible_distribution_release | lower }} main'
   notify: Apt update
 
+- name: Install Nvidia Drivers
+  when: flavor.gres is defined
+  block:
+    - name: Install ubuntu-drivers-common
+      apt:
+        name: ubuntu-drivers-common
+        state: present
+        update_cache: true
+
+    - name: Install recommended NVIDIA driver
+      command: ubuntu-drivers install
+      args:
+        creates: /usr/bin/nvidia-smi
+      notify: Nvidia drivers installed
+
 - name: Flush handlers
   meta: flush_handlers
diff --git a/bibigrid/resources/playbook/roles/bibigrid/templates/slurm/gres.j2 b/bibigrid/resources/playbook/roles/bibigrid/templates/slurm/gres.j2
@@ -1,8 +1,8 @@
 # GRES CONFIG
-{% set device_index = 0 %}
+{% set ns = namespace(device_index=0) %}
 {% for gres in flavor.gres %}
-    {% for i in range(gres.count | int) %}
-Name={{ gres.name }} Type={{ gres.type }} File=/dev/nvidia{{ device_index }}
-        {% set device_index = device_index + 1 %}
-    {% endfor %}
+{% for i in range(gres.count | int) %}
+Name={{ gres.name }} Type={{ gres.type }} File=/dev/nvidia{{ ns.device_index }}
+{% set ns.device_index = ns.device_index + 1 %}
+{% endfor %}
 {% endfor %}
diff --git a/documentation/markdown/bibigrid_feature_list.md b/documentation/markdown/bibigrid_feature_list.md
@@ -3,9 +3,9 @@
 |                               Name                               |                                                           Purpose                                                           |
 |:----------------------------------------------------------------:|:---------------------------------------------------------------------------------------------------------------------------:|
 |                  [Version](features/version.md)                  |                                 Returns BiBiGrid's version for opening issues and the like                                  |
-|        [Terminate Cluster](features/terminate_cluster.md)        |     Terminates the cluster specified by cluster-id i.e. removes key, application credentials, servers and floating-ips.     |
+|            [Terminate](features/terminate_cluster.md)            |     Terminates the cluster specified by cluster-id i.e. removes key, application credentials, servers and floating-ips.     |
 |                   [Create](features/create.md)                   |                                     Creates the cluster specified by the configuration.                                     |
-|            [List Clusters](features/list_clusters.md)            | Shows info of all clusters if no cluster-id is specified. Otherwise the cluster-id's cluster will be shown in great detail. |
+|                [List](features/list_clusters.md)                 | Shows info of all clusters if no cluster-id is specified. Otherwise the cluster-id's cluster will be shown in great detail. |
 |                    [Check](features/check.md)                    |                      Checks if given configuration is valid and necessary security measures are taken.                      |
 |                    [Web IDE](features/ide.md)                    |             Connects to running IDE of cluster-id's cluster. Requires that given cluster was setup with an ide.             |
 |                   [Update](features/update.md)                   |   Updates the master's playbook and runs that playbook for the master. Requires that no job is running and no workers up.   |
@@ -16,5 +16,6 @@
 |    [BiBiGrid Cluster Commands](features/cluster_commands.md)     |                                   Short useful commands to get information on the cluster                                   |
 |     [Other Configurations](features/other_configurations.md)     |                                      Info about custom `ansible.cfg` and `slurm.conf`                                       |
 |          [BiBiGrid REST API](features/bibigrid_rest.md)          |                                         Info about custom how to run BiBiGrid REST.                                         |
+|                  [GPU Nodes](features/gres.md)                   |                                                    Info about gpu nodes.                                                    |
 
 ![](../images/actions.jpg)
diff --git a/documentation/markdown/features/configuration.md b/documentation/markdown/features/configuration.md
@@ -238,7 +238,7 @@ workerInstance:
     volumes: # optional
       - name: volumeName
         snapshot: snapshotName # optional; to create volume from
-        # one or none of these
+        # one or none of these three
         # permanent: False
         # semiPermanent: False
         # exists: False

diff --git a/documentation/markdown/features/gres.md b/documentation/markdown/features/gres.md
@@ -0,0 +1,10 @@
+# GPU Nodes (GRES)
+
+Currently, BiBiGrid can only handle GPU nodes with NVIDIA graphic cards. 
+BiBiGrid will [install NVIDIA drivers](bibigrid/resources/playbook/roles/bibigrid/tasks/001-apt.yaml) 
+and set up the [gres.conf](https://slurm.schedmd.com/gres.conf.html) files and adjust 
+the [slurm.conf](https://slurm.schedmd.com/slurm.conf.html#OPT_Gres_1) accordingly.
+
+For this the gres information is stored in the group vars.
+
+You can check the installation by executing nvidia-smi or `sinfo -N -o "%N %G"` (which lists the gres).
diff --git a/tests/rest_tests/rest_tests.py b/tests/rest_tests/rest_tests.py
@@ -14,7 +14,7 @@
 with open(os.path.join(ROOT_PATH, "resources/tests/rest_test.json"), 'r', encoding='utf-8') as file:
     configurations_json = json.load(file)
 
-CLUSTER_ID = "123456789123456"
+CLUSTER_ID = "bibigrid1234567" # "a2ternativetest"
 
 client = TestClient(app)
 # Read the cloud_node_requirements YAML file and load it into a dictionary