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Security Posture for Production Grade K8 Cluster
- Securing a production Kubernetes cluster requires a multi-layered approach, addressing network security, access control, cluster hardening, pod-level security, and continuous monitoring.
- Use Network Policies: Kubernetes allows you to define network policies to control the communication between pods.
- Enable TLS/SSL to encrypt traffic between different Kubernetes components, such as communication between the API server and etcd.
- Implement RBAC to restrict what users and service accounts can do in the cluster.
- Integrate Kubernetes with identity providers such as AWS IAM, Azure AD, or Google Cloud IAM to leverage existing identity management solutions for authenticating users.
- Use cloud provider-specific security groups to control access to the nodes. Only expose necessary ports and limit access to trusted IPs.
- Ensure pods are not running as root by specifying runAsNonRoot in the security context of the pod specification.
- Use trusted and verified container images from secure registries, and avoid using images with known vulnerabilities.
- Use Kubernetes Secrets to store sensitive data such as API keys and passwords. Ensure secrets are encrypted at rest.
- Enable Kubernetes audit logs to track all events in the cluster. Monitor the performance of the cluster and set up alerts for unusual activities.
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