Is Kubernetes Kind cluster node running as a pod in the whole cluster container?

[yuchen9459]

I'm using kind to create Kubernetes clusters and learn some stuff about Kubernetes and service mesh. I went through the documents of kind, but I still have a question.

As I know, the minikube launch a cluster in a Virtual Machine. If uses create 2 Minikube clusters, there are two VMs running. If I understand it correctly, kind cluster runs in a container, and a kind cluster can be composed with several nodes, does that mean each node is a pod running in the kind cluster container?

[tao12345666333]

each node is a pod running in the kind cluster container

no. each node is a container on your host machine. please see https://kind.sigs.k8s.io/docs/design/node-image/#the-node-image

[tao12345666333]

if you run any pod in your kind cluster, each pod will in your container. (means docker in docker)

ref: https://kind.sigs.k8s.io/docs/design/initial/#overview

[yuchen9459]

if you run any pod in your kind cluster, each pod will in your container. (means docker in docker)

ref: https://kind.sigs.k8s.io/docs/design/initial/#overview

Thanks! If both control-plane and worker nodes are running as a container, clusters are separated by docker object label key. Does that mean the cluster is a logical cluster defined by the cluster name/ID, but they are just a bunch of running container nodes in the same host machine?

[neolit123]

you can create multiple clusters on the same host and their containers (nodes) will be prefixed with the cluster name:
kind create cluster --name some-cluster
would give you containers (nodes) called e.g some-cluster-worker2

[BenTheElder]

Does that mean the cluster is a logical cluster defined by the cluster name/ID, but they are just a bunch of running container nodes in the same host machine?

~ yes, the "node" containers are labeled with their cluster name (--name flag).

We do run kind in a pod sometimes #303, but locally each node is a container.

[BenTheElder]

Let me know if you have more questions 😊