What Does It Mean To Have A Well-Defined Kubernetes Security Best Practices?
"Discover Kubernetes security best practices, safeguard cluster integrity & protect data with our expert insights at Cpluz. Ensure a secure cloud-native application environment"
3 min readCpluz
Understanding Kubernetes Security Best Practices
Kubernetes has significantly replaced traditional virtual machines or bare servers for managing containerized applications. Irrespective of the advantages, leveraging Kubernetes also raises novel security concerns. Moreover, protecting against these security challenges is more complicated than preventing traditional server or virtual machine-based breaches. This unfolds the importance of solidifying Kubernetes Security Best Practices to ensure the surrounding ecosystem remains secure.
Defining Kubernetes Security Best Practices
Defining an exhaustive list of Kubernetes security best practices could be challenging. However, our understanding of Kubernetes Security Best Practices can be summarized into the following points:
- Ensure Secure Access to Control Plane Components
- Contain and Isolate Applications
- Execute and Practice Zero Trust Networking
- Implement Role-Based Access Control (RBAC)
- Secure Communication
- Secure Persistent Storage
- Keep Applications Up-To-Date
- Practice Monitoring and Enforcement of Compliance
- Exercise Regularly, Stay Secure
Ensure Secure Access to Control Plane Components
Kubernetes control plane components generally include the API server and the controller manager. Additionally, the etcd data store is used to persist and store configuration data such as resource definitions. It is critically important to ensure secure access to these components. Although the API server has a default secure endpoint, it is advisable to use HTTPS for Kubernetes 1.12 and later. Securing etcd is a different challenge and will be dealt with in detail later in this article.
Containerize Your Kubernetes Components
All components that run inside the cluster, including etcd, should run inside a container. Kubernetes components such as the API server and controller manager come packaged as containers. In addition, running etcd as a container can be beneficial for a variety of reasons.
Limit Access via Network Policies
Limiting access to the control plane components via network policies exclusively is beneficial. Network policies define and enforce networking behaviour relevant to Kubernetes pods.
Containment and Isolation
Kubernetes provides several tools for containing and isolating applications running on the platform. Many organizations choose to isolate applications completely into their own clusters if they are insecure or non-Kubernetes. Additionally, using resource quotas, pod quotas and limiting quality of service (QoS) policies to pods can go a long way in preventing resource exhaustion attacks.
Execute Zero Trust Networking
In Kubernetes, 'Zero Trust Networking' is the underlying principle that dictates that strict access controls need to be in place for communication from a single pod to any other via both ingress (ingressing into a pod) and egress (egressing from a pod). Kubernetes Network Policies are a critical piece in this realm to ensure adaptations based on Zero Trust principles.
Implementing Role-Based Access Control (RBAC)
Kubernetes RBAC ensures that there is separation of duties, with each cluster role executing its designated function. These cluster roles are then granted to certain users, and control access to different Kubernetes resources.
Secure Communication
The majority of Kubernetes internal communication relies on Unix domain sockets, which provides inherent security benefits such as preventing unauthorized access. Furthermore, Kubernetes network policies can shape internal communication to prevent unintended access to communications within namespace based on policy rules.
Identify, Clam, Contain and Eradicate Threats
In order to maintain a secure Kubernetes deployment, a continuous monitoring approach is necessary. Any suspicious activity within your deployment can arise from a wide array of sources and can be deployed as malicious or unintentional.
Conclusion
Comprehensively securing a Kubernetes cluster is monumentally vital. By understanding and implementing the core security best practices discussed in this article, organizations can reliably deploy Kubernetes without the fear of violating security principles. Follow these best practices for a safe and efficient deployment.
Contact Cpluz at info@cpluz.com or visit cpluz.com for professional Kubernetes security and management solutions.