Confusing error message when starting minikube with insufficient cpus

[seanrmurphy]

System:

$ cat /etc/os-release 
NAME="Ubuntu"
VERSION="20.04.2 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.2 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal

Minikube start:

$ minikube start --memory=6000 --cpus=6 --kubernetes-version=v1.14.1
* minikube v1.17.1 on Ubuntu 20.04 (amd64)
* Automatically selected the docker driver. Other choices: ssh, none
* Starting control plane node minikube in cluster minikube
* Creating docker container (CPUs=6, Memory=6000MB) ...

X Exiting due to RSRC_INSUFFICIENT_CORES: Docker has less than 2 CPUs available, but Kubernetes requires at least 2 to be available

This is running on a VM with 4 vCPUs - clearly requesting 6 vCPUs was not sensible, but the error message could be made a little more abstract/generic as, in this case, Docker had more than 2 (v)CPUs available. Looks like a change to this line is required:

minikube/pkg/minikube/node/advice.go

Line 53 in ff051f9

exit.Message(reason.RsrcInsufficientCores, "Docker has less than 2 CPUs available, but Kubernetes requires at least 2 to be available")

(I originally posted here but was advised this is a separate issue).

[afbjorklund]

Actually the real error message from docker is in the log, but it gets "translated" by minikube

docker: Error response from daemon: Range of CPUs is from 0.01 to 4.00, as there are only 4 CPUs available.

It is supposed to get validated by start in validateCPUCount, but only checks the minimum...

It would probably be a good idea to check that the limit is not higher than the number available ?

[BLasan]

Actually the real error message from docker is in the log, but it gets "translated" by minikube

docker: Error response from daemon: Range of CPUs is from 0.01 to 4.00, as there are only 4 CPUs available.

It is supposed to get validated by start in validateCPUCount, but only checks the minimum...

It would probably be a good idea to check that the limit is not higher than the number available ?

Can I work on this?

[BLasan]

/assign