Kubearmor

Kubearmor is an open-source Kubernetes-native runtime security enforcement system that applies fine-grained access control and observability to containerized workloads and host systems (container security, runtime security).

• Kubernetes-native runtime security enforcement for pods, containers, and nodes (container security, runtime security).
• Policy-based control over process execution, file access, and network operations using a unified policy model (policy-as-code, access control).
• Runtime enforcement using Linux security primitives such as eBPF and Linux Security Modules (LSM) on underlying hosts (kernel-level security).
• Visibility into workload behavior through telemetry and event logging for policy decisions and incident analysis (observability, security monitoring).
• Integration with Kubernetes constructs such as Custom Resource Definitions for managing and distributing security policies (Kubernetes platform security).

More About Kubearmor

Kubearmor is an open-source runtime security enforcement framework designed for Kubernetes environments, focusing on protecting containerized workloads and the underlying host systems (container security, runtime security). It provides a policy-driven model that allows platform and security teams to define and enforce granular security controls at runtime, directly aligned with Kubernetes constructs and operational workflows.

The project targets the problem space of runtime protection in cloud-native deployments, where containers and microservices run on shared hosts and require precise controls beyond build-time scanning or static configuration (cloud-native security). Kubearmor enforces restrictions on process execution, file system access, and network interactions in order to constrain workload behavior to an expected profile. This helps reduce the attack surface and block unauthorized actions within running workloads.

At its core, Kubearmor uses a Policy as Code (PaC) approach (policy-as-code, access control). Security policies are expressed as Kubernetes Custom Resources, which allows teams to manage them using standard Kubernetes tooling and workflows. These policies describe rules for allowed or denied operations, such as which binaries may execute in a container, which directories are readable or writable, or which outbound connections are permitted. Kubearmor then translates these high-level policies into runtime enforcement using Linux Security Modules and eBPF programs on the host kernel (kernel-level security).

The project provides observability and telemetry features that capture runtime events relevant to policy enforcement (observability, security monitoring). Events generated by policy matches or violations can be exported to external systems, logged for forensic review, or used to refine and tune policies. This runtime visibility supports both detection-oriented use cases and enforcement use cases, depending on how policies are configured.

In enterprise environments, Kubearmor is typically deployed as part of a Kubernetes cluster’s security stack alongside existing Continuous Integration and Continuous Deployment (CI/CD), registry scanning, and network security controls (Kubernetes platform security). Operators can apply policies at the level of Kubernetes namespaces, labels, or service groupings, enabling differentiated controls for different applications or teams. Because it integrates with native Kubernetes APIs, it aligns with GitOps workflows and other Infrastructure-as-Code (IaC) practices for centralized management.

From an architectural perspective, Kubearmor runs as components on cluster nodes that interact with the Linux kernel’s enforcement mechanisms while remaining manageable through Kubernetes interfaces (cluster security architecture). This design allows it to enforce policies close to the workload execution environment while keeping configuration and lifecycle operations within the Kubernetes Control Plane (KCP). Within a technical directory or catalog, Kubearmor fits into categories such as Kubernetes runtime security, container workload protection, and policy-driven access control for cloud-native platforms.