Balancing security with seamless team collaboration is critical in modern cloud-native environments like Amazon Elastic Kubernetes Service (EKS). While Kubernetes provides the flexibility needed to scale operations, it also introduces potential risks when enforcing policy and access control. EnterGatekeeper- a powerful tool designed to manage and implement policies across your EKS clusters, making cross-functional collaboration secure and efficient.

What is Gatekeeper?

Gatekeeper - an extension ofOpen Policy Agent (OPA)- is a policy engine for Kubernetes that helps enforce custom rules at the API level. By integrating with Kubernetes Admission Controllers, Gatekeeper allows administrators to set fine-grained access policies, ensuring that only authorized users can perform specific actions while maintaining the integrity of shared resources.

How does Gatekeeper enhance collaboration?

1. Role-Based Access Control (RBAC) Enforcement: Gatekeeper strengthens Kubernetes' native RBAC by adding an extra layer of custom policies to define precisely who can access or modify resources. This means each cross-functional team can be granted tailored permissions, ensuring they only interact with resources pertinent to their role.
2. Policy as Code: With Gatekeeper, policies are managed as code, making them version-controlled and auditable. Teams can collaborate to set policies that meet security standards while enabling operational flexibility. For example, developers might define policies for application namespaces while security teams enforce pod security or network policies - all within the same framework.
3. Prevent Misconfigurations: Gatekeeper ensures teams adhere to best practices and compliance rules by preventing misconfigurations in EKS clusters. It can automatically block or audit risky actions, like deploying unapproved container images, accessing sensitive namespaces, or creating high-privileged pods.
4. Automating Guardrails for Teams: With predefined policies, Gatekeeper automates the enforcement of access and operational rules, allowing cross-functional teams to focus on their core tasks without worrying about violating security guidelines. This helps maintain agility while staying compliant.

Unlocking cross-team collaboration with confidence

Gatekeeper helps unlock the potential of cross-functional teams within an EKS environment by striking the right balance between access control and collaboration. Security teams can implement stringent policies, while developers and DevOps can freely build and deploy within the guidelines. With Gatekeeper, collaboration becomes frictionless and secure, allowing your teams to innovate faster without compromising security.

In a world where cloud-native environments demand speed and security, Gatekeeper provides the perfect solution to enforce access control while fostering cross-team collaboration.

Enabling secure cross-business unit collaboration with namespace isolation

In large organizations where multiple business units (BUs) work on different projects, ensuring collaboration while maintaining security and access control is crucial. Kubernetes and Gatekeeper provide a powerful way to securely isolate and manage this collaboration. UsingKubernetes namespacesand Gatekeeper policies, each BU can operate independently within its environment, all while sharing the same EKS infrastructure. Here's how this approach works:

1. Namespace Isolation with BU Prefixes (e.g., BU-1, BU-2): Each business unit is assigned its namespace, prefixed with its respective name, such as BU-1, BU-2, etc. This provides a clear boundary for resources and operations within each namespace, ensuring that BU-specific workloads remain isolated. This strategy allows each BU to focus on its specific tasks without the risk of interfering with the work or data of other business units.
2. Role-Based CURD Operations Within Their Namespace: Gatekeeper enforcesCRUD (Create, Read, Update, Delete)permissions, ensuring that each BU can manage its resources within its assigned namespace. For instance, BU-1 will have complete control over resources such as deployments, services, and applications within the BU-1 namespace, while BU-2 operates in its own BU-2 namespace. This grants each BU the autonomy to manage and scale their operations independently while adhering to company-wide security policies.
3. Restrict Access Outside Their Namespace: The gatekeeper enforces strict policies to prevent access or operations outside a BU's designated namespace. For example, if BU-1 attempts to interact with resources in the BU-2 namespace, the Gatekeeper will automatically deny the request. This guarantees that sensitive data and operations in one BU remain inaccessible to other BUs unless explicitly permitted, reinforcing security and privacy.

Explanation:

• Shared EKS Cluster: This represents the shared Kubernetes environment where all business units (BUs) collaborate.
• BU Namespaces: Each business unit (BU-1, BU-2, BU-3) has its namespace for isolation.
• Restricted Access: Gatekeeper policies restrict access between namespaces. No BU can access or manipulate resources in another BU's namespace.
• CRUD Operations: Each BU can perform Create, Read, Update, and Delete operations only within its namespace.
• Gatekeeper Policy Enforcement: Gatekeeper policies enforce access control and ensure that operations are restricted to the appropriate namespace.

Real-world scenario

For example, consider BU-1 as the operations team working on infrastructure management and BU-2 as the product team deploying new features. Each unit operates within its namespace (BU-1, BU-2), ensuring its resources and tasks don't conflict. Gatekeeper policies are in place to ensure that no operations from BU-1 affect the resources of BU-2 and vice versa. This setup allows both teams to collaborate within a shared Kubernetes environment while maintaining clear operational boundaries

Conclusion: Gatekeeper for secure cross-BU collaboration

Using Gatekeeper to enforce namespace-based access control allows seamless collaboration between business units (BUs) while maintaining strong security policies. Each BU operates within its defined boundary (BU-1, BU-2, etc.), ensuring focused and secure operations. This approach allows organizations to enable agile collaboration without sacrificing control or security, making it an ideal solution for managing cross-functional teams within an EKS environment.

We'd love to hear what you think. Ask a Question, Comment Below, and Stay Connected with Cisco Security on social!