do not allow one letter profile names

[medyagh]

docker does not allow volume names shorter than 2 letters.
which will cause minikube to crash on docker driver

medya@~/workspace/minikube (docker_network) $ ./out/minikube start -p p
😄  [p] minikube v1.13.1 on Darwin 10.15.6
✨  Automatically selected the docker driver. Other choices: hyperkit, virtualbox
👍  Starting control plane node p in cluster p
🔥  Creating docker container (CPUs=2, Memory=4000MB) ...
🤦  StartHost failed, but will try again: creating host: create: creating: setting up container node: creating volume for p container: docker volume create p --label name.minikube.sigs.k8s.io=p --label created_by.minikube.sigs.k8s.io=true: exit status 1
stdout:

stderr:
Error response from daemon: create p: volume name is too short, names should be at least two alphanumeric characters

🤷  docker "p" container is missing, will recreate.
🔥  Creating docker container (CPUs=2, Memory=4000MB) ...
😿  Failed to start docker container. Running "minikube delete -p p" may fix it: recreate: creating host: create: creating: setting up container node: creating volume for p container: docker volume create p --label name.minikube.sigs.k8s.io=p --label created_by.minikube.sigs.k8s.io=true: exit status 1
stdout:

stderr:
Error response from daemon: create p: volume name is too short, names should be at least two alphanumeric characters

❗  Startup with docker driver failed, trying with alternate driver hyperkit: Failed to start host: recreate: creating host: create: creating: setting up container node: creating volume for p container: docker volume create p --label name.minikube.sigs.k8s.io=p --label created_by.minikube.sigs.k8s.io=true: exit status 1
stdout:

stderr:
Error response from daemon: create p: volume name is too short, names should be at least two alphanumeric characters

🔥  Deleting "p" in docker ...
🔥  Removing /Users/medya/.minikube/machines/p ...
💀  Removed all traces of the "p" cluster.
💾  Downloading driver docker-machine-driver-hyperkit:
    > docker-machine-driver-hyperkit.sha256: 65 B / 65 B [---] 100.00% ? p/s 0s
    > docker-machine-driver-hyperkit: 10.90 MiB / 10.90 MiB  100.00% 11.74 MiB 
🔑  The 'hyperkit' driver requires elevated permissions. The following commands will be executed:

    $ sudo chown root:wheel /Users/medya/.minikube/bin/docker-machine-driver-hyperkit 
    $ sudo chmod u+s /Users/medya/.minikube/bin/docker-machine-driver-hyperkit 


Password: 

we should not allow single letter profile names

[tiejl]

You're welcome to assign me on this one