k8s-cleaner for Kubernetes Resource Cleanup Automation
k8s-cleaner helps teams maintain healthy Kubernetes clusters by automatically detecting unused, stale, or unhealthy resources. As environments scale, manual cleanup becomes risky and slow. Because of this, automation plays a key role in keeping clusters stable and cost-effective.
At the same time, this approach gives platform teams more control over how cleanup rules are defined.
What Is k8s-cleaner?
k8s-cleaner is a Kubernetes controller designed to identify orphaned or unhealthy objects across a cluster. Unlike basic garbage collection, it works with standard and custom resource types.
Moreover, it supports advanced filtering through labels and Lua-based logic. This flexibility makes it suitable for modern, dynamic Kubernetes environments.
Key Capabilities
This tool offers several practical features that simplify daily operations:
- Flexible scheduling to run as a CronJob or DaemonSet
- Label-based selection for precise targeting
- Custom Lua rules to define cleanup logic
- Built-in notifications via Slack, Webex, Discord, or reports
- Automated actions such as delete or update
As a result, teams reduce manual effort while improving cluster hygiene.
Why Use k8s-cleaner in Kubernetes Environments?
Many cleanup tools rely on fixed definitions of unused resources. However, every platform is different. This solution allows teams to define what “unused” or “unhealthy” means based on real workloads.
Operational Benefits
Using this approach delivers clear advantages:
- Lower resource consumption by removing unused objects
- Improved performance across the control plane
- Reduced operational risk from stale dependencies
- Simplified cluster management through automation
Consequently, engineers can focus more on delivery and less on maintenance.
How k8s-cleaner Works in Practice
Deployment is straightforward. Once installed, Cleaner objects define which resources to evaluate and what action to take.
For example, completed Jobs with no running pods can be safely removed. Similarly, PersistentVolumeClaims that are no longer attached to workloads can be detected and handled automatically.
The Kubernetes documentation highlights that unmanaged resources are a common cause of cost and instability in large clusters . Therefore, automated cleanup becomes essential at scale.
Built-In Library for Common Cleanup Scenarios
The included library provides ready-made Cleaner definitions for common Kubernetes objects, including:
- Pods, Jobs, Deployments, and StatefulSets
- ConfigMaps, Secrets, and ServiceAccounts
- PersistentVolumes and PersistentVolumeClaims
- Roles, ClusterRoles, and Ingress resources
In addition, advanced rules support lifecycle-based detection.
Expired and Aged Resources
Resources can be identified using:
- Time-to-live policies
- Explicit expiration dates
- Age-based thresholds
Because of this, temporary objects never outstay their purpose.
Unhealthy Resource Detection
The library also helps uncover hidden issues, such as:
- Pods using outdated secrets
- Workloads relying on expired certificates
- Ingress rules pointing to missing Services
- Deployments referencing missing ConfigMaps or Secrets
As a result, teams can resolve problems before outages occur.
Notifications and Visibility
Cleanup activities remain transparent through integrated notifications. Alerts can be sent to Slack, Webex, Discord, or structured reports.
Because of this visibility, automation runs safely without losing control or auditability.
Platform Operations with ZippyOPS
ZippyOPS helps organizations implement and operate Kubernetes platforms with confidence. It provides consulting, implementation, and managed services across DevOps, DevSecOps, DataOps, Cloud, Automated Ops, AIOps, and MLOps.
In addition, ZippyOPS supports secure microservices architectures, scalable infrastructure, and strong security practices. These capabilities ensure cleanup automation aligns with broader platform goals.
Learn more about ZippyOPS offerings:
Services: https://zippyops.com/services/
Solutions: https://zippyops.com/solutions/
Products: https://zippyops.com/products/
For demos and tutorials, visit the ZippyOPS YouTube channel: https://www.youtube.com/@zippyops8329
Conclusion
k8s-cleaner plays an important role in keeping Kubernetes clusters efficient, secure, and reliable. It reduces waste, improves performance, and lowers operational risk. In summary, automated cleanup is a must-have for modern cloud-native platforms.
To adopt this approach as part of a broader DevOps and cloud strategy, contact ZippyOPS at [email protected].
