As a Kubernetes environment grows, so does the number of tasks that need to be managed daily. Rolling out new releases, tracking issues, managing resources, and maintaining reliable operations gradually require a range of specialized solutions.

This is why a broad ecosystem of tools with different purposes has developed around Kubernetes. In this article, we will look at the main categories, popular solutions within each one, and how individual tools can be combined when building and managing a Kubernetes environment.

Why Does Kubernetes Need Additional Tools?

Kubernetes provides the core functionality for container orchestration, but it does not cover every task involved in building and managing a complete environment on its own. Additional tools and technologies are typically used for application deployment, networking, observability, security, and infrastructure automation.

Many of these are open-source projects developed within the Cloud Native Computing Foundation (CNCF) or by the broader technology community. Organizations can combine different solutions based on their infrastructure and specific requirements rather than being limited to a predefined set of tools. This flexibility to choose and integrate different technologies is what forms the broader Kubernetes ecosystem.

What Are Kubernetes Tools Used For?

Tools in the Kubernetes ecosystem can be grouped according to the tasks they perform. The main categories cover the entire process, from preparing the infrastructure and deploying applications to monitoring, securing, and recovering them.

• Infrastructure: Provides the compute resources, storage, and networking environment required to run Kubernetes clusters.
• Cluster management: Tools for creating, configuring, monitoring, and administering Kubernetes clusters.
• Application deployment: Solutions for packaging, configuring, and automating application deployments and updates.
• Networking: Manages communication between applications and access to them through networking plugins, ingress controllers, and service mesh technologies.
• Observability: Collects metrics, logs, and tracing data that help teams monitor performance and identify problems.
• Security: Covers access control, policy enforcement, sensitive data management, and certificates.
• Infrastructure automation: Uses Infrastructure as Code (IaC) to automate and standardize the provisioning and management of infrastructure resources.
• Backup and recovery: Provides the ability to restore applications, Kubernetes resources, and data after failures, errors, or data loss.

Popular Kubernetes Tools by Category

Kubernetes Cluster Management Tools

Kubernetes clusters can be managed through command-line, graphical, or terminal-based interfaces. The right tool depends on the task at hand and the administrator's preferred way of working.

• kubectl: The official Kubernetes command-line tool. It is used to manage resources and configurations, deploy applications, inspect cluster status, and troubleshoot issues.
• Lens: A desktop application with a graphical interface for viewing and managing Kubernetes clusters. It allows administrators to monitor workloads, resources, and cluster health without relying exclusively on the command line.
• K9s: A terminal-based interface for Kubernetes that simplifies navigation between resources, workload monitoring, and everyday administrative tasks.

Package and Configuration Management Tools

When working with Kubernetes, the same applications often need to be deployed with different settings across testing, development, and production environments. Package and configuration management tools simplify this process and reduce the need to maintain multiple configuration files manually.

• Helm: A popular package manager for Kubernetes that organizes applications and their required configurations into reusable packages called Helm charts. These can be adapted to different environments and requirements.
• Kustomize: A tool for customizing Kubernetes configuration files (manifests) without modifying the original YAML files. It allows a single base configuration to be adapted for different environments, such as development, staging, and production.

GitOps and CI/CD Tools

GitOps and CI/CD tools automate application deployments and changes to the Kubernetes environment. With GitOps, the desired state of applications and configurations is stored in a Git repository that serves as the source of truth. This makes changes easier to track, review, and roll back when necessary while reducing the need for manual modifications directly in the cluster.

• Argo CD: A GitOps continuous delivery tool that monitors configurations in Git and synchronizes the Kubernetes cluster with the desired state.
• Flux: A GitOps toolkit that monitors Git repositories for changes and automatically applies updated configurations to the Kubernetes environment.
• Tekton: A CI/CD framework built for Kubernetes that enables teams to create and automate pipelines for building, testing, and delivering applications.

Networking and Service Mesh Tools

Networking in Kubernetes covers communication between applications, external access to them, and control over network traffic. Different solutions are used for these tasks, including ingress controllers, networking platforms, and service mesh tools.

• NGINX Ingress Controller: Manages incoming traffic to applications in the Kubernetes cluster and routes it to the appropriate services using Kubernetes Ingress resources.
• Cilium: An eBPF-based platform for networking, security, and observability. It is used to manage communication between workloads and enforce network policies.
• Istio: A service mesh solution for managing communication between services. It provides capabilities for traffic routing and control, securing connections, and collecting telemetry data.
• Linkerd: A service mesh solution focused on easier deployment and management. It provides secure and reliable communication between services without some of the complexity associated with more feature-rich service mesh platforms.

Observability Tools

Observability in a Kubernetes environment is typically based on three main types of data: metrics, logs, and tracing. Combining them helps teams monitor application health and performance, identify issues, and determine their causes more quickly.

• Prometheus: Collects and stores metrics from applications and the Kubernetes environment. The data can be used to monitor performance and create alerts for specific events or issues.
• Grafana: Visualizes metrics and other data through customizable dashboards, providing a clearer overview of application and infrastructure health.
• Loki: A system for centralized log collection, storage, and querying that integrates with Grafana and other observability tools.
• Fluent Bit: Collects, processes, and forwards logs from applications and infrastructure to systems for centralized storage and analysis.
• OpenTelemetry: Provides a standardized approach to generating, collecting, and exporting telemetry data, including metrics, logs, and traces.
• Jaeger: A distributed tracing tool that helps track requests as they move between individual services and identify latency or performance issues.

Security and Policy Management Tools

Kubernetes security includes controlling permitted configurations and actions, managing TLS certificates, and protecting sensitive information. Specialized tools help apply these rules automatically and consistently across clusters and applications.

• Kyverno: A policy management tool designed specifically for Kubernetes. It can validate and modify existing resources, as well as automatically generate new ones according to predefined rules.
• OPA Gatekeeper: Uses Open Policy Agent (OPA) to define and enforce rules for Kubernetes resources. It can be used to enforce security, configuration, and compliance requirements.
• Cert-manager: Automates the issuance, renewal, and management of TLS certificates for applications and services in Kubernetes.
• External Secrets Operator: Connects Kubernetes to external secret management systems and synchronizes the required sensitive information with the cluster.

Infrastructure Automation Tools

Infrastructure automation allows the required resources to be defined and managed through code instead of being configured manually. This makes it easier to create consistent environments, track changes, and manage infrastructure as it grows.

• Terraform: A popular Infrastructure as Code (IaC) tool for provisioning and managing infrastructure. It can be used for Kubernetes clusters, networks, storage, and other related cloud resources.
• Crossplane: Allows cloud infrastructure to be provisioned and managed directly through Kubernetes. This enables teams to use familiar Kubernetes patterns and APIs to work with external infrastructure resources.

Backup and Recovery Tools

Backups are necessary to protect both application data and Kubernetes environment configurations. They enable faster recovery after accidental deletion, corruption, or infrastructure failures and can also simplify moving applications between different clusters.

• Velero: A tool for backing up and restoring Kubernetes resources and persistent volumes. It can be used for disaster recovery as well as migrating applications and data between clusters.

How Do Kubernetes Tools Work Together?

In practice, tools from different categories are used as parts of a broader workflow. Infrastructure as Code solutions such as Terraform can provision the required infrastructure, after which Helm and Kustomize can be used to deploy and configure applications. Argo CD or Flux can then automate the process of applying changes from Git to the Kubernetes environment.

Once applications are deployed, networking tools manage communication and access, while observability solutions collect metrics, logs, and tracing data. Security and policy management tools control configurations, certificates, and sensitive data, while solutions such as Velero provide backups and recovery capabilities.

The exact combination depends on the architecture and requirements of the project. Not every Kubernetes environment needs a tool from every category, nor do all the solutions covered in this article need to be part of the same technology stack.

How to Choose Kubernetes Tools

The right set of tools depends on the architecture of the Kubernetes environment, the tasks that need to be automated, and the team's experience. When selecting tools, it is important to avoid solutions with unnecessarily overlapping functionality. Follow these two simple guidelines:

• Consider your environment: Check whether the tool is suitable for your on-premises, cloud, or hybrid infrastructure and whether it integrates with the rest of your systems.
• Check compatibility and support: Make sure the tool supports the Kubernetes version you use, is actively maintained, and has up-to-date documentation.

For example, a team managing several applications in Kubernetes might use Helm for packaging and deployment, Argo CD to automatically apply changes from Git, and Prometheus with Grafana for monitoring. If there is no need for complex communication rules across multiple microservices, adding a service mesh solution such as Istio could increase complexity without providing enough practical value.

Conclusion

The set of tools used alongside Kubernetes typically evolves as the infrastructure and applications grow. A solution that is sufficient for a single cluster and a small team may gradually need to be expanded or replaced as the number of applications, security requirements, and overall complexity increase. A good Kubernetes stack is therefore not the one with the most tools, but the one that solves specific operational needs without adding unnecessary infrastructure complexity.

Building and maintaining such an ecosystem, however, requires careful planning and ongoing technical expertise. Delta.BG's Managed Kubernetes service helps businesses deploy and manage production-ready Kubernetes environments with expert support, proactive monitoring, reliable security, and integration with the tools that best fit their infrastructure and development processes.

If you are planning to deploy Kubernetes or want to optimize your existing environment, our team can help you choose the right solution for your business. Contact us at support@delta.bg or call +359 2 4 288 288.