Run ReadME.md example, Bug Get FileNotFoundError: [Errno 2] No such file or directory: '/var/run/secrets/kubernetes.io/serviceaccount/namespace'

[Yumeka999]

What happened?

when i use this code to test katib (ReadME.md example)

import kubeflow.katib as katib

# Step 1. Create an objective function.
def objective(parameters):
    # Import required packages.
    import time
    time.sleep(5)
    # Calculate objective function.
    result = 4 * int(parameters["a"]) - float(parameters["b"]) ** 2
    # Katib parses metrics in this format: <metric-name>=<metric-value>.
    print(f"result={result}")

# Step 2. Create HyperParameter search space.
parameters = {
    "a": katib.search.int(min=10, max=20),
    "b": katib.search.double(min=0.1, max=0.2)
}

# Step 3. Create Katib Experiment.
katib_client = katib.KatibClient()
name = "tune-experiment"
katib_client.tune(
    name=name,
    objective=objective,
    parameters=parameters,
    objective_metric_name="result",
    max_trial_count=12
)

# Step 4. Get the best HyperParameters.
print(katib_client.get_optimal_hyperparameters(name))

What did you expect to happen?

python run_katib.py

I get this error:

Traceback (most recent call last):
  File "run_katib.py", line 1, in <module>
    import kubeflow.katib as katib
  File "/root/.local/lib/python3.8/site-packages/kubeflow/katib/__init__.py", line 73, in <module>
    from kubeflow.katib.api.katib_client import KatibClient
  File "/root/.local/lib/python3.8/site-packages/kubeflow/katib/api/katib_client.py", line 30, in <module>
    class KatibClient(object):
  File "/root/.local/lib/python3.8/site-packages/kubeflow/katib/api/katib_client.py", line 36, in KatibClient
    namespace: str = utils.get_default_target_namespace(),
  File "/root/.local/lib/python3.8/site-packages/kubeflow/katib/utils/utils.py", line 37, in get_default_target_namespace
    return get_current_k8s_namespace()
  File "/root/.local/lib/python3.8/site-packages/kubeflow/katib/utils/utils.py", line 30, in get_current_k8s_namespace
    with open("/var/run/secrets/kubernetes.io/serviceaccount/namespace", "r") as f:
FileNotFoundError: [Errno 2] No such file or directory: '/var/run/secrets/kubernetes.io/serviceaccount/namespace'

Environment

Kubernetes version:

WARNING: This version information is deprecated and will be replaced with the output from kubectl version --short.  Use --output=yaml|json to get the full version.
Client Version: version.Info{Major:"1", Minor:"24", GitVersion:"v1.24.12", GitCommit:"ef70d260f3d036fc22b30538576bbf6b36329995", GitTreeState:"clean", BuildDate:"2023-03-15T13:37:18Z", GoVersion:"go1.19.7", Compiler:"gc", Platform:"linux/amd64"}
Kustomize Version: v4.5.4
Server Version: version.Info{Major:"1", Minor:"24", GitVersion:"v1.24.12", GitCommit:"ef70d260f3d036fc22b30538576bbf6b36329995", GitTreeState:"clean", BuildDate:"2023-03-15T13:30:13Z", GoVersion:"go1.19.7", Compiler:"gc", Platform:"linux/amd64"}

Katib controller version:

harbor.xnunion.com/kubeflow/kubeflowkatib/katib-controller:v0.17.0(

Katib Python SDK version:

Name: kubeflow-katib
Version: 0.17.0
Summary: Katib Python SDK for APIVersion v1beta1
Home-page: https://github.com/kubeflow/katib/tree/master/sdk/python/v1beta1
Author: Kubeflow Authors
Author-email: premnath.vel@gmail.com
License: Apache License Version 2.0
Location: /root/.local/lib/python3.8/site-packages
Requires: certifi, grpcio, kubernetes, protobuf, setuptools, six, urllib3
Required-by:

Impacted by this bug?

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[andreyvelich]

Thank you for creating this @Yumeka999! From where did you run the SDK ? Also, can you check this directory?

ls -la /var/run/secrets/kubernetes.io/

/area sdk /remove-label lifecycle/needs-triage