A tool processes the template—executing any embedded scripting and replacing parameters with desired values—to generate the configuration. Reuse comes from using different sets of values with the same template. The challenge here is that the templates and value files are not specifications of Kubernetes API resources.
Simply so, what are Kubernetes overlays?
An overlay is a directory with a kustomization. yaml that refers to other kustomization directories as its bases . A base has no knowledge of an overlay and can be used in multiple overlays. An overlay may have multiple bases and it composes all resources from bases and may also have customization on top of them.
Subsequently, what is difference between Docker and Kubernetes?
A fundamental difference between Kubernetes and Docker is that Kubernetes is meant to run across a cluster while Docker runs on a single node. Kubernetes is more extensive than Docker Swarm and is meant to coordinate clusters of nodes at scale in production in an efficient manner.
What is helm in Kubernetes?
What is Helm? In simple terms, Helm is a package manager for Kubernetes. Helm is the K8s equivalent of yum or apt. Helm deploys charts, which you can think of as a packaged application. It is a collection of all your versioned, pre-configured application resources which can be deployed as one unit.
What is Helm template?
Templates generate manifest files, which are YAML-formatted resource descriptions that Kubernetes can understand. We’ll look at how templates are structured, how they can be used, how to write Go templates, and how to debug your work. This guide focuses on the following concepts: The Helm template language. Using …
What is Kubernetes manifest file?
The manifest is a specification of a Kubernetes API object in JSON or YAML format. A manifest specifies the desired state of an object that Kubernetes will maintain when you apply the manifest.
What is Kubernetes YAML apiVersion?
In the . yaml file for the Kubernetes object you want to create, you’ll need to set values for the following fields: apiVersion – Which version of the Kubernetes API you’re using to create this object. … metadata – Data that helps uniquely identify the object, including a name string, UID , and optional namespace.
What is Kubernetes Yaml file?
If you’ve been doing software development for a while, particularly with Kubernetes or containers, you’ve probably run into a YAML file. YAML — or, “Yet Another Markup Language” — is a text format used to specify data related to configuration. … You explore an example YAML file that’s used in Kubernetes.
What is POD in Kubernetes?
Pods are the smallest, most basic deployable objects in Kubernetes. A Pod represents a single instance of a running process in your cluster. Pods contain one or more containers, such as Docker containers. When a Pod runs multiple containers, the containers are managed as a single entity and share the Pod’s resources.
What is replica set in Kubernetes?
A ReplicaSet is a process that runs multiple instances of a Pod and keeps the specified number of Pods constant. Its purpose is to maintain the specified number of Pod instances running in a cluster at any given time to prevent users from losing access to their application when a Pod fails or is inaccessible.
What is Template in YAML?
Templates let you define reusable content, logic, and parameters. … Templates combine the content of multiple YAML files into a single pipeline. You can pass parameters into a template from your parent pipeline.