How can I increase number of CPUs?

[tbrodbeck]

I have been trying to increase the amount of cpus of my podman because I am not able to start minikube:

minikube start --driver=podman --container-runtime=cri-o

😄  minikube v1.24.0 on Darwin 12.0.1
✨  Using the podman (experimental) driver based on user configuration

⛔  Exiting due to RSRC_INSUFFICIENT_CORES: Requested cpu count 2 is greater than the available cpus of 1

How can I fix this? I am temporarily have to switch back to docker where it runs without a problem.

I could not find a reliable resource or explanation how to increase the amount of cpus podman uses.
I have tried

➜  ~ podman system renumber
Error: unrecognized command `podman system renumber`

Version (latest from brew):

➜  ~ podman --version
podman version 3.4.4

[rhatdan]

@giuseppe PTAL

[giuseppe]

I don't think that error is coming from Podman. It looks like a check in Minikube itself. Are you running Podman as rootless? Does it work differently if you run as root?

[afbjorklund]

@tbrodbeck

The amount of cpus and memory is set when the machine is created, so you will need to re-create it:

podman machine stop
podman machine rm
podman machine init --cpus 2 --memory 2048 --disk-size 20
podman machine start

Make sure to save any images and such before deleting, it might be possible to edit the json directly.

[afbjorklund]

I don't think that error is coming from Podman. It looks like a check in Minikube itself

Podman defaults to 1 vCPU and 2 GiB RAM, while kubeadm requires 2 vCPU + 2 GiB

https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/

Also increased the disk size from 10 GiB to 20 GiB, since it is also tricky to do afterwards.

[afbjorklund]

If there existed any "Podman Desktop" documentation for this, minikube could be linking to it:

        if availableCPUs < cpuCount {
                if driver.IsDockerDesktop(drvName) {
                        out.Styled(style.Empty, `- Ensure your {{.driver_name}} daemon has access to enough CPU/memory resources.`, out.V{"driver_name": drvName})
                        if runtime.GOOS == "darwin" {
                                out.Styled(style.Empty, `- Docs https://docs.docker.com/docker-for-mac/#resources`)
                        }
                        if runtime.GOOS == "windows" {
                                out.String("\n\t")
                                out.Styled(style.Empty, `- Docs https://docs.docker.com/docker-for-windows/#resources`)
                        }
                }

                exitIfNotForced(reason.RsrcInsufficientCores, "Requested cpu count {{.requested_cpus}} is greater than the available cpus of {{.avail_cpus}}", out.V{"requested_cpus": cpuCount, "avail_cpus": availableCPUs})
        }

But it would need to be user facing, I don't think the CLI help or the man page would be enough.

[rhatdan]

Interested in adding documentation?

[tbrodbeck]

Thanks. I was able to fix the error!
Still, I cannot get minikube starting. So I opened an issue in the minikube repo, FYI: kubernetes/minikube#13261

[giuseppe]

Would it make sense to change the podman machine configuration to use 2 cpus?

[afbjorklund]

Would it make sense to change the podman machine configuration to use 2 cpus?

Possibly, if you want it to run kubeadm ? Otherwise 1 vCPU and 1 GiB used to be fine...

(as in: docker-machine and podman-machine started out with those humble requirements)

But Lima uses 4 vCPU and 4 GiB by default, so I guess it depends on the situation.

i.e. the available resources on the local laptop, and how many VMs you plan to run ?

[afbjorklund]

Interested in adding documentation?

I think it is documented in the man page:

https://docs.podman.io/en/latest/markdown/podman-machine-init.1.html

But there is no User Manual, as such.

[rhatdan]

Aren't these settings available in the containers.conf?

[afbjorklund]

Still, I cannot get minikube starting. So I opened an issue in the minikube repo,

I don't think minikube works with podman remote / machine yet, it failed for me as well...

The first thing would be to switch the VM over to run regular containers instead of rootless:

podman system connection default podman-machine-default-root

Anyway, these issues are unrelated to how to make the VM have 2 vCPU instead of 1 vCPU

[afbjorklund]

I could not find a reliable resource or explanation how to increase the amount of cpus podman uses.

https://podman.io/getting-started/installation#macos links to this page for "advanced":

https://github.com/containers/podman/blob/main/docs/tutorials/mac_experimental.md

It doesn't mention either --cpus or containers.conf, for changing the machine init.

[github-actions]

A friendly reminder that this issue had no activity for 30 days.

[giuseppe]

#12718 was merged. Closing the issue

[tpoxa]

podman machine set podman-machine-default --cpus=2