8a2c201719
The links for pods and kubelets no longer work so update to new links with relevant info. Fixes #7487 Signed-off-by: Chelsea Mafrica <chelsea.e.mafrica@intel.com>
1.8 KiB
Kubernetes support
Kubernetes, or K8s, is a popular open source container orchestration engine. In Kubernetes, a set of containers sharing resources such as networking, storage, mount, PID, etc. is called a pod.
A node can have multiple pods, but at a minimum, a node within a Kubernetes cluster only needs to run a container runtime and a container agent (called a Kubelet).
Kata Containers represents a Kubelet pod as a VM.
A Kubernetes cluster runs a control plane where a scheduler (typically running on a dedicated master node) calls into a compute Kubelet. This Kubelet instance is responsible for managing the lifecycle of pods within the nodes and eventually relies on a container runtime to handle execution. The Kubelet architecture decouples lifecycle management from container execution through a dedicated gRPC based Container Runtime Interface (CRI).
In other words, a Kubelet is a CRI client and expects a CRI implementation to handle the server side of the interface. CRI-O and containerd are CRI implementations that rely on OCI compatible runtimes for managing container instances.
Kata Containers is an officially supported CRI-O and containerd runtime. Refer to the following guides on how to set up Kata Containers with Kubernetes: