vcluster
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Create fully functional virtual Kubernetes clusters - Each vcluster runs inside a namespace of the underlying k8s cluster. It's cheaper than creating separate full-blown clusters and it offers better multi-tenancy and isolation than regular namespaces.
Prerequisites
- Kubernetes 1.18+
- Helm 3.10.0+
Get Helm Repository Info
helm repo add loft-sh https://charts.loft.sh
helm repo update
See helm repo for command documentation.
Install Helm Chart
helm upgrade [RELEASE_NAME] loft-sh/vcluster -n [RELEASE_NAMESPACE] --create-namespace --install
See vcluster docs for configuration options.
See helm upgrade for command documentation.
Connect to the vcluster
In order to connect to the installed vcluster, please install vcluster cli and run:
vcluster connect [RELEASE_NAME] -n [RELEASE_NAMESPACE]
Uninstall Helm Chart
helm uninstall [RELEASE_NAME]
This removes all the Kubernetes components associated with the chart and deletes the release.
See helm uninstall for command documentation.
Why Virtual Kubernetes Clusters?
- Cluster Scoped Resources: much more powerful than simple namespaces (virtual clusters allow users to use CRDs, namespaces, cluster roles etc.)
- Ease of Use: usable in any Kubernetes cluster and created in seconds either via a single command or cluster-api
- Cost Efficient: much cheaper and efficient than "real" clusters (single pod and shared resources just like for namespaces)
- Lightweight: built upon the ultra-fast k3s distribution with minimal overhead per virtual cluster (other distributions work as well)
- Strict isolation: complete separate Kubernetes control plane and access point for each vcluster while still being able to share certain services of the underlying host cluster
- Cluster Wide Permissions: allow users to install apps which require cluster-wide permissions while being limited to actually just one namespace within the host cluster
- Great for Testing: allow you to test different Kubernetes versions inside a single host cluster which may have a different version than the virtual clusters
Learn more on www.vcluster.com.
Learn more in the documentation.