Refactor dss commands exit codes and logging

src/dss/create_notebook.py

@@ -42,24 +42,22 @@ def create_notebook(name: str, image: str, lightkube_client: Client) -> None:
     if not does_dss_pvc_exist(lightkube_client) or not does_mlflow_deployment_exist(
         lightkube_client
     ):
-        logger.error("Failed to create notebook. DSS was not correctly initialized.\n")
-        logger.info(
-            "You might want to run\n"
-            "  dss status      to check the current status\n"
-            "  dss logs --all  to review all logs\n"
-            "  dss initialize  to install dss\n"
-        )
-        return
+        logger.debug("Failed to create notebook. DSS was not correctly initialized.")
+        logger.error("Failed to create notebook. DSS was not correctly initialized.")
+        logger.info("Note: You might want to run")
+        logger.info("  dss status      to check the current status")
+        logger.info("  dss logs --all  to view all logs")
+        logger.info("  dss initialize  to install dss")
+        raise RuntimeError()
     if does_notebook_exist(name, DSS_NAMESPACE, lightkube_client):
         # Assumes that the notebook server is exposed by a service of the same name.
-        logger.error(
-            f"Failed to create Notebook. Notebook with name '{name}' already exists.\n"
-            f"Please specify a different name."
-        )
+        logger.debug(f"Failed to create Notebook. Notebook with name '{name}' already exists.")
+        logger.error(f"Failed to create Notebook. Notebook with name '{name}' already exists.")
+        logger.info("Please specify a different name.")
         url = get_service_url("name", DSS_NAMESPACE, lightkube_client)
         if url:
             logger.info(f"To connect to the existing notebook, go to {url}.")
-        return
+        raise RuntimeError()
 
     manifests_file = Path(
         Path(__file__).parent, MANIFEST_TEMPLATES_LOCATION, "notebook_deployment.yaml.j2"
@@ -85,30 +83,25 @@ def create_notebook(name: str, image: str, lightkube_client: Client) -> None:
 
         logger.info(f"Success: Notebook {name} created successfully.")
     except ApiError as err:
-        logger.error(
-            f"Failed to create Notebook with error code {err.status.code}."
-            " Check the debug logs for more details."
-        )
-        logger.debug(f"Failed to create Notebook {name} with error {err}")
-        return
+        logger.debug(f"Failed to create Notebook {name}: {err}.", exc_info=True)
+        logger.error(f"Failed to create Notebook with error code {err.status.code}.")
+        logger.info(" Check the debug logs for more details.")
+        raise RuntimeError()
     except TimeoutError as err:
-        logger.error(str(err))
-        logger.warn(
-            f"Timed out while trying to create Notebook {name}.\n"
-            "Some resources might be left in the cluster. Check the status with `dss list`."
-        )
-        return
+        logger.debug(f"Failed to create Notebook {name}: {err}", exc_info=True)
+        logger.error(f"Timed out while trying to create Notebook {name}.")
+        logger.warn(" Some resources might be left in the cluster.")
+        logger.info(" Check the status with `dss list`.")
+        raise RuntimeError()
     except ImagePullBackOffError as err:
-        logger.error(
-            f"Timed out while trying to create Notebook {name}.\n"
-            f"Image {image_full_name} does not exist or is not accessible.\n"
-        )
+        logger.debug(f"Timed out while trying to create Notebook {name}: {err}.", exc_info=True)
+        logger.error(f"Timed out while trying to create Notebook {name}.")
+        logger.error(f"Image {image_full_name} does not exist or is not accessible.")
         logger.info(
             "Note: You might want to use some of these recommended images:\n"
             f"{RECOMMENDED_IMAGES_MESSAGE}"
         )
-        logger.debug(f"Timed out while trying to create Notebook {name} with error {err}.")
-        return
+        raise RuntimeError()
     # Assumes that the notebook server is exposed by a service of the same name.
     url = get_service_url(name, DSS_NAMESPACE, lightkube_client)
     if url:

src/dss/logs.py

@@ -30,9 +30,12 @@ def get_logs(parts: str, name: str, lightkube_client: Client) -> None:
                 if deployment.metadata.name == name:
                     break
             else:
+                logger.debug(
+                    f"Failed to retrieve logs. Deployment '{name}' does not exist in {DSS_NAMESPACE} namespace."  # noqa E501
+                )
                 logger.error(f"Failed to retrieve logs. Notebook '{name}' does not exist.")
                 logger.info("Run 'dss list' to check all notebooks.")
-                return
+                raise RuntimeError()
             pods = lightkube_client.list(
                 Pod, namespace=DSS_NAMESPACE, labels=deployment.spec.selector.matchLabels
             )
@@ -46,15 +49,16 @@ def get_logs(parts: str, name: str, lightkube_client: Client) -> None:
                     namespace=DSS_NAMESPACE,
                     labels=mlflow_deployment.spec.selector.matchLabels,
                 )
-            except ApiError:
+            except ApiError as e:
+                logger.debug(f"Failed to retrieve logs for MLflow: {e}")
                 logger.error(
-                    "Failed to retrieve logs. MLflow seems to be not present.Make sure DSS is correctly initialized."  # noqa: E501
+                    "Failed to retrieve logs. MLflow seems to be not present. Make sure DSS is correctly initialized."  # noqa: E501
                 )
                 logger.info("Note: You might want to run")
                 logger.info("  dss status      to check the current status")
                 logger.info("  dss logs --all  to view all logs")
                 logger.info("  dss initialize  to install dss")
-                return
+                raise RuntimeError()
         elif parts == "all":
             deployments = list(lightkube_client.list(Deployment, namespace=DSS_NAMESPACE))
             pods = []
@@ -65,18 +69,19 @@ def get_logs(parts: str, name: str, lightkube_client: Client) -> None:
                     )
                 )
     except ApiError as e:
-        logger.error(e)
+        logger.debug(f"Failed to retrieve logs for {parts} {name}: {e}", exc_info=True)
         logger.error(
             f"Failed to retrieve logs for {parts} {name}. Make sure DSS is correctly initialized."  # noqa: E501
         )
         logger.info("Note: You might want to run")
         logger.info("  dss status      to check the current status")
         logger.info("  dss initialize  to install dss")
-        return
+        raise RuntimeError()
 
     if not pods:
+        logger.debug(f"Failed to retrieve logs. No pods found for {parts} {name}.")
         logger.error(f"Failed to retrieve logs. No pods found for {parts} {name}.")
-        return
+        raise RuntimeError()
 
     for pod in pods:
         # Retrieve logs from the pod
@@ -87,7 +92,10 @@ def get_logs(parts: str, name: str, lightkube_client: Client) -> None:
                 line = line.rstrip("\n")
                 logger.info(line)
         except ApiError as e:
-            logger.error(e)
+            logger.debug(
+                f"Failed to retrieve logs for pod {pod.metadata.name}: {e}", exc_info=True
+            )
             logger.error(
                 f"Failed to retrieve logs. There was a problem while getting the logs for {pod.metadata.name}"  # noqa: E501
             )
+            raise RuntimeError()

src/dss/main.py

@@ -1,5 +1,4 @@
 import click
-from lightkube.core.exceptions import ApiError
 
 from dss.config import DEFAULT_NOTEBOOK_IMAGE, RECOMMENDED_IMAGES_MESSAGE
 from dss.create_notebook import create_notebook
@@ -34,10 +33,15 @@ def initialize_command(kubeconfig: str) -> None:
     """
     logger.info("Executing initialize command")
 
-    kubeconfig = get_default_kubeconfig(kubeconfig)
-    lightkube_client = get_lightkube_client(kubeconfig)
+    try:
+        kubeconfig = get_default_kubeconfig(kubeconfig)
+        lightkube_client = get_lightkube_client(kubeconfig)
 
-    initialize(lightkube_client=lightkube_client)
+        initialize(lightkube_client=lightkube_client)
+    except Exception as e:
+        logger.debug(f"Failed to initialize dss: {e}.", exc_info=True)
+        logger.error(f"Failed to initialize dss: {str(e)}.")
+        click.get_current_context().exit(1)
 
 
 IMAGE_OPTION_HELP = "\b\nThe image used for the notebook server.\n"
@@ -72,10 +76,17 @@ def create_notebook_command(name: str, image: str, kubeconfig: str) -> None:
             " For more information on using a specific image, see dss create --help."
         )
 
-    kubeconfig = get_default_kubeconfig(kubeconfig)
-    lightkube_client = get_lightkube_client(kubeconfig)
+    try:
+        kubeconfig = get_default_kubeconfig(kubeconfig)
+        lightkube_client = get_lightkube_client(kubeconfig)
 
-    create_notebook(name=name, image=image, lightkube_client=lightkube_client)
+        create_notebook(name=name, image=image, lightkube_client=lightkube_client)
+    except RuntimeError:
+        click.get_current_context().exit(1)
+    except Exception as e:
+        logger.debug(f"Failed to create notebook {name}: {e}.", exc_info=True)
+        logger.error(f"Failed to create notebook {name}: {str(e)}.")
+        click.get_current_context().exit(1)
 
 
 create_notebook_command.help += f"""
@@ -112,15 +123,22 @@ def logs_command(kubeconfig: str, notebook_name: str, print_all: bool, mlflow: b
         )
         return
 
-    kubeconfig = get_default_kubeconfig(kubeconfig)
-    lightkube_client = get_lightkube_client(kubeconfig)
+    try:
+        kubeconfig = get_default_kubeconfig(kubeconfig)
+        lightkube_client = get_lightkube_client(kubeconfig)
 
-    if print_all:
-        get_logs("all", None, lightkube_client)
-    elif mlflow:
-        get_logs("mlflow", None, lightkube_client)
-    elif notebook_name:
-        get_logs("notebooks", notebook_name, lightkube_client)
+        if print_all:
+            get_logs("all", None, lightkube_client)
+        elif mlflow:
+            get_logs("mlflow", None, lightkube_client)
+        elif notebook_name:
+            get_logs("notebooks", notebook_name, lightkube_client)
+    except RuntimeError:
+        click.get_current_context().exit(1)
+    except Exception as e:
+        logger.debug(f"Failed to retrieve logs: {e}.", exc_info=True)
+        logger.error(f"Failed to retrieve logs: {str(e)}.")
+        click.get_current_context().exit(1)
 
 
 @main.command(name="status")
@@ -130,10 +148,13 @@ def logs_command(kubeconfig: str, notebook_name: str, print_all: bool, mlflow: b
 )
 def status_command(kubeconfig: str) -> None:
     """Checks the status of key components within the DSS environment. Verifies if the MLflow deployment is ready and checks if GPU acceleration is enabled on the Kubernetes cluster by examining the labels of Kubernetes nodes for NVIDIA or Intel GPU devices."""  # noqa E501
-    kubeconfig = get_default_kubeconfig(kubeconfig)
-    lightkube_client = get_lightkube_client(kubeconfig)
+    try:
+        kubeconfig = get_default_kubeconfig(kubeconfig)
+        lightkube_client = get_lightkube_client(kubeconfig)
 
-    get_status(lightkube_client)
+        get_status(lightkube_client)
+    except RuntimeError:
+        click.get_current_context().exit(1)
 
 
 @main.command(name="list")
@@ -178,13 +199,16 @@ def stop_notebook_command(kubeconfig: str, notebook_name: str):
     Example:
         dss stop my-notebook
     """
-    kubeconfig = get_default_kubeconfig(kubeconfig)
-    lightkube_client = get_lightkube_client(kubeconfig)
-
     try:
+        kubeconfig = get_default_kubeconfig(kubeconfig)
+        lightkube_client = get_lightkube_client(kubeconfig)
         stop_notebook(name=notebook_name, lightkube_client=lightkube_client)
-    except (RuntimeError, ApiError):
-        exit(1)
+    except RuntimeError:
+        click.get_current_context().exit(1)
+    except Exception as e:
+        logger.debug(f"Failed to stop notebook: {e}.", exc_info=True)
+        logger.error(f"Failed to stop notebook: {str(e)}.")
+        click.get_current_context().exit(1)
 
 
 # FIXME: remove the `--kubeconfig`` option
@@ -237,13 +261,17 @@ def remove_notebook_command(name: str, kubeconfig: str):
     """
     logger.info("Executing remove command")
 
-    kubeconfig = get_default_kubeconfig(kubeconfig)
-    lightkube_client = get_lightkube_client(kubeconfig)
-
     try:
+        kubeconfig = get_default_kubeconfig(kubeconfig)
+        lightkube_client = get_lightkube_client(kubeconfig)
+
         remove_notebook(name=name, lightkube_client=lightkube_client)
     except RuntimeError:
-        exit(1)
+        click.get_current_context().exit(1)
+    except Exception as e:
+        logger.debug(f"Failed to remove notebook: {e}.", exc_info=True)
+        logger.error(f"Failed to remove notebook: {str(e)}.")
+        click.get_current_context().exit(1)
 
 
 @main.command(name="purge")

src/dss/remove_notebook.py

@@ -25,10 +25,10 @@ def remove_notebook(name: str, lightkube_client: Client) -> None:
     if not does_notebook_exist(
         name=name, namespace=DSS_NAMESPACE, lightkube_client=lightkube_client
     ):
-        logger.error(
-            f"Failed to remove Notebook. Notebook {name} does not exist. Run 'dss list' to check all notebooks."  # noqa E501
-        )
-        raise RuntimeError("Failed to remove Notebook not found.")
+        logger.debug(f"Failed to remove Notebook. Notebook {name} does not exist.")
+        logger.error(f"Failed to remove Notebook. Notebook {name} does not exist.")  # noqa E501
+        logger.info("Run 'dss list' to check all notebooks.")
+        raise RuntimeError()
 
     # From this point forward we know either one or both
     # resources (Deployment, Service) exist for the Notebook.
@@ -49,11 +49,12 @@ def remove_notebook(name: str, lightkube_client: Client) -> None:
                 exceptions.append(err)
 
     if exceptions:
+        logger.debug(f"Failed to remove notebook {name}: {exceptions}")
         logger.error(f"Failed to remove notebook {name}. Please try again.")
         logger.info("Note: You might want to run")
         logger.info("  dss status      to check the current status")
         logger.info(f"  dss logs {name} to review the notebook logs")
-        raise RuntimeError(f"Failed to remove notebook {name} with errors", exceptions)
+        raise RuntimeError()
     else:
         logger.info(
             f"Removing the notebook {name}. Check `dss list` for the status of the notebook."

src/dss/status.py

@@ -44,5 +44,6 @@ def get_status(lightkube_client: Client) -> None:
         else:
             logger.info("GPU acceleration: Disabled")
     except Exception as e:
+        logger.debug(f"Failed to retrieve status: {e}", exc_info=True)
         logger.error(f"Failed to retrieve status: {e}")
-        return
+        raise RuntimeError()

src/dss/stop.py

@@ -24,9 +24,10 @@ def stop_notebook(name: str, lightkube_client: Client) -> None:
     if not does_notebook_exist(
         name=name, namespace=DSS_NAMESPACE, lightkube_client=lightkube_client
     ):
+        logger.debug(f"Failed to stop Notebook. Notebook {name} does not exist.")
         logger.error(f"Failed to stop Notebook. Notebook {name} does not exist.")
         logger.info("Run 'dss list' to check all notebooks.")
-        raise RuntimeError(f"Failed to stop Notebook. Notebook {name} does not exist.")
+        raise RuntimeError()
 
     obj = Deployment.Scale(
         metadata=ObjectMeta(name=name, namespace=DSS_NAMESPACE), spec=ScaleSpec(replicas=0)
@@ -39,6 +40,6 @@ def stop_notebook(name: str, lightkube_client: Client) -> None:
         )
         return
     except ApiError as e:
-        logger.error(f"Failed to stop Notebook {name}")
-        logger.debug(f"Failed to scale down Deployment {name} with error: {e}")
-        raise e
+        logger.debug(f"Failed to scale down Deployment {name}: {e}", exc_info=True)
+        logger.error(f"Failed to stop notebook {name}.")
+        raise RuntimeError()