kubernetes / client-go

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Kubernetes API Interaction

Reason: Understanding how to interact with the Kubernetes API, including creating, retrieving, updating, and deleting resources, is crucial for any Kubernetes application.

Concepts

Clientset, Resources, API Versions, REST Operations, Discovery, Dynamic Clients.

Authentication and Authorization

Reason: Implementing secure access to the Kubernetes cluster requires proper authentication and authorization mechanisms.

Concepts

Authentication plugins (exec, gcp, oidc, azure), Service Accounts, RBAC, API Groups, Roles, RoleBindings, ClusterRoles, ClusterRoleBindings.

Client Configuration

Reason: Configuring the client library to connect to a Kubernetes cluster is essential for any application that needs to interact with the API.

Concepts

In-cluster configuration, Out-of-cluster configuration, Kubeconfig file, Client-go flags, Context, Namespaces.

Controllers and Informer Pattern

Reason: Implementing controllers and leveraging the informer pattern is a common approach for managing Kubernetes resources and responding to changes.

Concepts

Informers, Listers, Workqueues, Event Handlers, Reconcilers, Controller logic.

Resource Management

Reason: Efficiently managing Kubernetes resources, like Pods, Deployments, and Services, is crucial for application deployment and lifecycle management.

Concepts

Resource definitions, Labels, Annotations, Selectors, Replication Controllers, ReplicaSets, Deployments, StatefulSets, Services, Ingress.

Testing and Debugging

Reason: Thorough testing and debugging are crucial to ensure the reliability and correctness of the client library and applications that utilize it.

Concepts

Unit testing, Integration testing, End-to-end testing, Mocking, Fake clients, Debugging tools, Logging, Error handling.

CI/CD Integration

Reason: Implementing continuous integration and continuous delivery (CI/CD) pipelines with client-go is essential for automated application deployment and updates.

Concepts

Build systems (e.g., Jenkins, GitLab CI), Deployment pipelines, Container images, Kubernetes manifests, Deployment strategies.

Security Best Practices

Reason: Securing Kubernetes clusters and applications is paramount to protect sensitive data and prevent unauthorized access.

Concepts

Authentication and authorization (already covered), Secure communication (TLS/SSL), Role-based access control (RBAC), Network policies, Pod security policies, Secrets management.

Advanced Features

Reason: Beyond basic interaction, client-go offers advanced features for specific needs, like dynamic resource access and scaling.

Concepts

Dynamic client, Discovery API, Scaling, Custom Resource Definitions (CRDs).

Tools and Utilities

Reason: Client-go provides a suite of tools and utilities that simplify common tasks for Kubernetes development.

Concepts

Clientcmd, Port forwarding, Leader election, Metrics, Event handling, Watch, Cache, Synctrack.

Open API and Schema

Reason: Understanding the Open API specification and how client-go interacts with it is essential for working with the Kubernetes API.