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Kustomize is a Kubernetes-native configuration customization tool that helps platform and DevOps teams manage application manifests across multiple environments without duplicating YAML. It uses a base-and-overlay approach so shared resources stay consistent while environment-specific changes (for example, image tags, replicas, or ingress settings) are applied cleanly for development, staging, and production clusters.
Kustomize is commonly used in Git-based workflows and CI/CD or GitOps pipelines, where overlays are reviewed in version control and rendered into final manifests before being applied. It is also available via kubectl, which simplifies adoption alongside existing Kubernetes tooling.
Orchestration systems decide where and when workloads run on a cluster of machines (physical or virtual). On top of that, orchestration systems usually help manage the lifecycle of the workloads running on them. Nowadays, these systems are usually used to orchestrate containers, with the most popular one being Kubernetes.
There are many advantages to using Orchestration tools:
Kustomize is a Kubernetes-native configuration customization tool that layers environment-specific changes on top of shared base manifests. It is used to keep deployments consistent across clusters and stages without maintaining separate copies of YAML.
Kustomize works best when teams want to stay close to raw Kubernetes YAML and avoid templating, but it is less suited to complex conditional logic or large-scale packaging needs. For highly parameterized deployments or richer chart ecosystems, alternatives may be a better fit.
Common alternatives include Helm and Jsonnet, as well as GitOps-oriented tooling like Argo CD and Flux that can apply Kustomize outputs in deployment pipelines.
Our experience with Kustomize helped us build repeatable patterns and supporting tooling for managing Kubernetes configuration safely across environments, clusters, and teams. We used it to reduce drift, standardize rollouts, and keep application and platform changes auditable without duplicating manifests.
Some of the things we did include:
This experience helped us accumulate significant knowledge across multi-environment delivery, GitOps operations, and platform standardization, enabling us to deliver high-quality Kustomize setups that are maintainable, secure, and easy to evolve as workloads grow.
Some of the things we can help you do with Kustomize include: