10 Advanced Kubernetes Features You Need to Know for Your Business

Kubernetes has emerged as a widely accepted platform for container orchestration. In the following years since its release, developers and organizations have been able to leverage Kubernetes features efficiently to ensure efficient and scalable application deployment. With time, Kubernetes has evolved and introduced several advanced features to improve the handling of complex applications and ensure better application management and development. In this article, we will discuss the top 10 advanced Kubernetes features that can significantly benefit your business operations.

1. Horizontal Pod Autoscaling (HPA)

Kubernetes introduced Horizontal Pod Autoscaling (HPA) to manage the application's resources dynamically. In traditional environments, managing the resources manually could be challenging due to the sudden increase in traffic or application usage. HPA allows the scaling of resources and ensures optimal use of resources to meet changing demand levels. Through HPA, you can configure it to automatically adjust the number of replicas in your Deployment based on the CPU utilization.

Working of Horizontal Pod Autoscaling (HPA)

HPA, with the help of Metrics API, monitors resource utilization on Kubernetes pods.
When the CPU usage exceeds the established threshold, HPA adds more pods to keep up with the demand.
After the CPU usage drops below the established threshold, HPA removes excess pods to optimize resource utilization.

2. Cluster Autoscaling (CA)

Cluster Autoscaling is another feature in Kubernetes that allows you to dynamically adjust cluster resources based on demand. It comes into play when you have multiple nodes in your Kubernetes deployment. With CA, your cluster can showcase increased performance and flexibility depending on the resource utilization. AITorch can assist you in implementing and efficiently managing Cluster Autoscaling.

Working of Cluster Autoscaling (CA)

CA perceives the resource utilization across the nodes in the cluster, meaning if the load becomes too high, nodes are added to handle the spike, and removed when usage is optimal.
CA is advantageous in scenarios where scalability and speed are necessary for traffic or new feature deployment.

3. DaemonSets

DaemonSets are a type of Kubernetes object that supports the deployment of applications and services in a cluster. Its primary goal is to ensure that specified applications or services run across all (or some) nodes in your cluster. If a node fails due to any reason, DaemonSets automatically reschedule containers to make sure your applications are not unavailable. DaemonSet is a vital feature for applications that require running on every node, like logging, monitoring, and cluster maintenance tools.

Advantages and Use Cases of DaemonSets

DaemonSets are essential components for cluster-level applications that need to run in every node.
You can use DaemonSets for scheduling device plugins or network agents, as they operate on the host.

4. Persistent StatefulSets

StatefulSets is another popular Kubernetes deployment controller object which being an extension of Deployments effectively handles stateful applications with storage & ordering persistence, such as databases and replicating network filesystems with a fixed identity and enduring storage.

Creating Persistent StatefulSets

For creating Persistent StatefulSets, it is necessary to include a StorageClass along with the definition of StatefulSets. StorageClass is a resource that provides the information to select a provisioner and can be used to provision storage along with the necessary access modes.

5. Service Mesh: Istio

Kubernetes has introduced a series of advanced features and tools that have long-lasting impacts on infrastructure and applications alike. One such popular tool for managing networking in a microservices-based architecture is Service Mesh. A Service Mesh lets you manage network communications between microservices. Istio is one of the leading Service Mesh tools available, used for building, deploying, and managing microservices-based, distributed systems. A Service Mesh can be effectively implemented using Kubernetes for traffic flow management and security.

Key Features and Benefits of Istio

Inobservability: Gives high visibility and better understanding of the separate service interactions within the application.
Secure Connectivity: Allows very secure network communication between services.
Control and Observation: Control over the service traffic routing between the nodes of the Service Mesh and control over the observed data of the entire Service Mesh.

6. Kubernetes ReplicaSet

ReplicaSet is responsible for maintaining the desired Number of replicas for a deployment in your Kubernetes cluster. A user would use ReplicaSet to modify the number of pods they need. It can also be used to replace or terminate a pod when necessary. The primary purpose of this feature is to maintain a stable number of replicas.

Benefits of Kubernetes ReplicaSet

Maintains a given desired number of replicas for a containerized application.
Ensures higher availability for the system.
Assists in managing individual running instances of a pod.

7. Kubernetes Rolling Updates

A rolling update is a method used in Kubernetes deployments to update or replace configurations for a updated image while traffic continues to be managed. Normally updates happen while the application is running, taking minimal downtime in the process. This provides smooth upgrades of applications and improves everyday operations.

Benefits of Kubernetes Rolling Upgrades

Eliminates the downtime during the application upgrade process.
Promotes better management of resources and helps schedule upgrades.
Serves to improve overall uptime and availability.

8. Kubernetes Alpha Features

Alpha features usually come in newer versions of Kubernetes and tend to have a lot of caveats and limitations. These features help users test, share feedback, and contribute to the Kubernetes project towards better feature enhancements. You can implement alpha features in your Kubernetes setup to create custom deployment strategies that fit your specific needs.

Working of Kubernetes Alpha Features

Alpha features are usually disabled by default in the smaller and lighter setups in Kubernetes.
As soon as features pass the alpha phase, they are considered stable and ready for production.

9. Kubernetes Gossip Protocol

The gossip protocol in Kubernetes allows pods to communicate with each other in the cluster through the node IP. This method allows for easy communication among nodes through information sharing within the pods, which subsequently helps in minimizing unnecessary load on the cluster. Additionally, the gossip protocol helps nodes detect any changes within the cluster.

How Kubernetes Gossip Protocol Works

Kubernetes employs services to manage how information from one node is sent to other.
Pods have a unique endpoint address which serves to enable efficient pod-to-pod communication.

10. Kubernetes Volume Snapshot

Kubernetes volume snapshot is a feature that enables creating snapshots of persistent volumes (PVs), thus protecting valuable data and reducing the risk of data loss. Volume Snapshot provides reliability and better safety by storing the existing state of a volume at a specific point of time, making it possible to restore it in case of unexpected data loss.

Advantages of Kubernetes Volume Snapshot

Entire states of a volume can be preserved quickly using the snapshot feature.
The snapshot feature enables efficient data restoration, providing better safety against data loss.

Conclusion

Kubernetes has been continuously adding and introducing new features to enhance cluster management, functionality, and flexibility. As a widely adopted platform, it is evolving as the heart of every modern tech stack for uninterrupted application management and development. Each of the features mentioned above can significantly benefit your business operations in diverse ways. It is significant to embrace and adapt these features for a fruitful and productive experience.

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