set memory and cpu limit for kind create cluster

[soheilade]

hi, I created a kind cluster, while describing the node, I see the following limit for default
Allocated resources:

(Total limits may be over 100 percent, i.e., overcommitted.)
 Resource           Requests    Limits
 --------           --------    ------
 cpu                850m (21%)  100m (2%)
 memory             190Mi (1%)  390Mi (2%)
 ephemeral-storage  0 (0%)      0 (0%)

however, I need to modify the amount of memory and cpu, any idea?
P.s. I am looking for something like this in minikube : minikube --memory 8192 --cpus 2 start

[aojea]

Those are the allocated resources, if you scroll up in the output of the node description you can find the real limits that are the ones that you have on your host. The node inherits the host limits. This snippet is from my local machine that has 8 CPUs and 32G of RAM:

Addresses:
  InternalIP:  172.17.0.2
  Hostname:    kind-control-plane
Capacity:
  cpu:                8
  ephemeral-storage:  932095312Ki
  hugepages-1Gi:      0
  hugepages-2Mi:      0
  memory:             32918956Ki
  pods:               110
Allocatable:
  cpu:                8
  ephemeral-storage:  932095312Ki
  hugepages-1Gi:      0
  hugepages-2Mi:      0
  memory:             32918956Ki
  pods:               110

I guess that the minikube ones are because that's the memory and CPU assigned to the VM. You can create a VM with the memory and RAM predefined and run KIND inside if you want to limit its resources the same way

[soheilade]

great, thanks alot :)

[bestofman]

Those are the allocated resources, if you scroll up in the output of the node description you can find the real limits that are the ones that you have on your host. The node inherits the host limits. This snippet is from my local machine that has 8 CPUs and 32G of RAM:

Addresses:
  InternalIP:  172.17.0.2
  Hostname:    kind-control-plane
Capacity:
  cpu:                8
  ephemeral-storage:  932095312Ki
  hugepages-1Gi:      0
  hugepages-2Mi:      0
  memory:             32918956Ki
  pods:               110
Allocatable:
  cpu:                8
  ephemeral-storage:  932095312Ki
  hugepages-1Gi:      0
  hugepages-2Mi:      0
  memory:             32918956Ki
  pods:               110

I guess that the minikube ones are because that's the memory and CPU assigned to the VM. You can create a VM with the memory and RAM predefined and run KIND inside if you want to limit its resources the same way

So what is the equivalent command for minikube --memory 8192 --cpus 2 start or a config.yaml file while creating a cluster to specify more memory and cpu numbers?

I have tried to deploy Cassandra on my Kind cluster but it is stuck on STATUS: pending and I think it's because of the lack of the execution of the command I mentioned above.

[stmcginnis]

There is no equivalent as that's not how kind works.

You can create a VM with the memory and RAM predefined and run KIND inside if you want to limit its resources the same way

[mujiannan]

docker update --cpus=16 -m 30g --memory-swap -1 kind-control-plane
kind-control-plane

I can limit the container. But this didn't change the display on k8s-dashboard, and I don't know what will happen if the cluster reach my limit on its container.
I'm sure it won't break the host machine.

[franpog859]

There is no equivalent as that's not how kind works.

You can create a VM with the memory and RAM predefined and run KIND inside if you want to limit its resources the same way

Do you have any workaround for that?

[BenTheElder]

#1963, no really great options yet. There's some early discussions of revisiting being able to tell Kubelet/cadvisor a different CPU/memory limit but nothing we can act on yet. Even that would only be a partial answer.

If you need functioning resource limits, you should use a VM or machine based solution for now unfortunately.