Add code samples for Connect Gateway API

[hodaaaaaaaaaa]

Description

Fixes #

Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google.

Checklist

• I have followed Sample Guidelines from AUTHORING_GUIDE.MD
• README is updated to include all relevant information
• Tests pass: nox -s py-3.9 (see Test Environment Setup)
  Manually tested as the API call requires extensive setup shttps://cloud.google.com/kubernetes-engine/enterprise/multicluster-management/gateway/setup
• Lint pass: nox -s lint (see Test Environment Setup)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

[gemini-code-assist]

Hello @hodaaaaaaaaaa, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

Summary of Changes

This pull request adds code samples for the Connect Gateway API. It includes a README with instructions on how to get started, a Python script (main.py) that fetches the GKE Connect Gateway URL, configures a Kubernetes client, and lists namespaces in the cluster, and a requirements.txt file specifying the necessary dependencies. Additionally, the CODEOWNERS file is updated to include the new connectgateway directory.

Highlights

• New code samples: Adds sample code for interacting with the Connect Gateway API using Python.
• Dependency management: Includes a requirements.txt file to manage the project's dependencies.
• Code ownership: Updates the CODEOWNERS file to assign ownership for the new connectgateway directory.

Changelog

• .github/CODEOWNERS
  • Added connectgateway/* to the codeowners, assigning ownership to @Hodamo, @GoogleCloudPlatform/connectgateway, @GoogleCloudPlatform/python-samples-reviewers, and @GoogleCloudPlatform/cloud-samples-reviewers.
• connectgateway/README.md
  • Created a README file with instructions on how to get started with the Connect Gateway API samples, including steps for project setup, billing, authentication, and Connect Gateway setup.
• connectgateway/main.py
  • Created a Python script that fetches the GKE Connect Gateway URL, configures a Kubernetes client using a service account, and lists namespaces in the cluster.
  • Includes error handling and instructions for developers to update configuration variables.
• connectgateway/requirements.txt
  • Added dependencies for google-cloud-connect-gateway, google-auth, and kubernetes.

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To connect, a gateway we seek,
With Python's help, the cluster speaks.
Namespaces appear,
Dispelling all fear,
In Kubernetes, knowledge we keep.

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[gemini-code-assist]

Code Review

The pull request adds code samples for the Connect Gateway API. The code includes a README, a Python script to list namespaces in a Kubernetes cluster, and a requirements file. Overall, the code is well-structured and easy to understand. However, there are a few areas that could be improved.

Summary of Findings

• Missing Error Handling: The code lacks comprehensive error handling, particularly around API calls and configuration loading. This could lead to unexpected behavior and make debugging difficult.
• Hardcoded Configuration Values: The script uses hardcoded values for project number, membership location, and membership ID. This limits the script's reusability and makes it difficult to adapt to different environments.
• TODO Comments: The script contains TODO comments that indicate incomplete or missing functionality. These should be addressed before merging the code.

Merge Readiness

The pull request is not ready to be merged due to the presence of critical and high severity issues. The missing error handling and hardcoded configuration values need to be addressed before merging. I am unable to directly approve the pull request, and users should have others review and approve this code before merging.