Kubernetes Security: Top 5 Best Practices for Securing Kubernetes Clusters

July 26, 2022

As more and more of your business-critical applications run in Kubernetes, securing Kubernetes becomes increasingly critical. The ability to operate and secure clusters in a standardized fashion is essential in a rapidly growing Kubernetes environment. If your team has been asking itself how to secure Kubernetes clusters, this blog is for you. It examines five Kubernetes security best practices you can use to improve the security posture of individual clusters and your entire K8s fleet.

Kubernetes Security Best Practice 1: Implement Zero Trust

As with any computing environment, perimeter security alone is no longer enough to protect Kubernetes. Zero trust has emerged as the best method of protecting your computing environments and data. Zero trust is a security model that assumes that all actors, systems, and services operating in and between networks should not and cannot be trusted.

Kubernetes provides all the hooks necessary for zero trust security, including tools for authentication, authorization, admission control, and auditing. However, while these tools give you the ability to create a zero-trust environment, keeping all the individual elements correctly configured and aligned becomes a challenge once you have more than a few clusters, especially when multiple workloads and Kubernetes distributions are involved.

How Rafay Helps

Rafay’s Zero-Trust Access Service ensures that zero trust best practices are applied and enforced to secure your entire Kubernetes environment, eliminating the need to manually apply Kubernetes security best practices on every cluster.

Kubernetes Security Best Practice 2: Automate Updates

As with any software, Kubernetes and its add-ons are only as secure as they are up to date. New versions of Kubernetes come out frequently and update methods can be highly dependent on the Kubernetes distribution(s) you are using. If you are using multiple versions of K8s on-premises (not uncommon) as well as managed Kubernetes services in one or more clouds or cloud accounts, keeping everything updated can be a time-consuming and error-prone process.

How Rafay Helps

Rafay’s Multi-Cluster Management Service allows you to deploy, manage, and upgrade all of your Kubernetes clusters from a single console, across on-premises, bare metal, public clouds (AWS, Azure, GCP), and remote/edge environments.

You can upgrade all clusters—regardless of distribution—with a single click. Pre-flight checks, post-upgrade validation, and audits ensure a reliable, repeatable, and efficient upgrade process.

Kubernetes Security Best Practice 3: Monitor Everything

Platform teams can’t manage, secure, and support what they can’t see. Given the dynamic nature of applications running in a K8s environment, monitoring is often a challenge. The Kubernetes environment is extremely extensible and integrates with a large ecosystem of monitoring tools that provide diverse visibility, monitoring, and logging capabilities.

Many platform teams use combinations of tools to create monitoring solutions that address specific monitoring needs. One of the most commonly used combinations is Prometheus plus Grafana. However, as your Kubernetes environment grows, deploying and managing these tools creates significant complexity.

How Rafay Helps

The Rafay Visibility and Monitoring Service is a cloud-based solution that unifies monitoring, alerting, and visualization for all your Kubernetes clusters and applications on a single pane of glass (SPOG), centralizing Kubernetes logging and management for your K8s fleet.

Kubernetes Security Best Practice 4: Use Policy-Driven Security

Ensuring compliance with security policies and industry regulations can be difficult. Open Policy Agent (OPA) is a general-purpose policy engine that is increasingly used to enforce policy compliance for Kubernetes and other software.

How Rafay Helps

Rafay’s Kubernetes Policy Management Service includes the ability to configure OPA policies and ensure policy compliance across your K8s clusters.

Kubernetes Security Best Practice 5: Integrate Your Security Tools

Kubernetes provides a large ecosystem of tools to tailor a K8s cluster to satisfy unique requirements including security. However, as clusters multiply, ensuring that everything is deployed and integrated properly becomes an increasing challenge, potentially exposing vulnerabilities and security gaps.

How Rafay Helps

Rafay management services are designed to integrate with the K8s distributions and tools you already use, including out-of-the-box integrations with popular single sign-on (SSO) solutions and SIEM tools.

Security at Rafay

Rafay delivers the fleet management capabilities you need to ensure the success and security of your Kubernetes environment, helping you rationalize and standardize management across your entire fleet of K8s clusters and applications, while reducing the complexity of maintaining cluster and application security.

Ready to find out why so many enterprises and platform teams have partnered with Rafay to improve Kubernetes security and simplify fleet management? Sign up for a free trial.

Tags:
how to secure kubernetes cluster
Kubernetes Security
kubernetes security best practices
securing kubernetes