profile name should not have "_"

[Win0818]

Invalid value: "vm_0_10_centos": a DNS-1123 subdomain must consist of lower case alphanumeric character

[priyawadhwa]

Hey @Win0818 --
I don’t yet have a clear way to replicate this issue. Do you mind adding some additional details? Here is additional information that would be helpful:

• The exact minikube start command line used
• The full output of the minikube start command, preferably with --alsologtostderr -v=4 for extra logging.
• The full output of minikube logs
• The full output of kubectl get po -A

Thank you for sharing your experience!

[afbjorklund]

I think this error is from kubeadm, as it needs a valid hostname.

https://en.wikipedia.org/wiki/Hostname

While a hostname may not contain other characters, such as the underscore character (_)

Easiest solution would be to rename the VM, without underscores.

[medyagh]

I think this error is from kubeadm, as it needs a valid hostname.

https://en.wikipedia.org/wiki/Hostname

While a hostname may not contain other characters, such as the underscore character (_)

Easiest solution would be to rename the VM, without underscores.

if that is the case we should add a solution message or not allow such profile names.

[medyagh]

I just tested this manually,

medya@~/workspace/minikube (docker_prefered) $ minikube start -p vm_0_10_centos --driver=hyperkit
😄  [vm_0_10_centos] minikube v1.12.0-beta.0 on Darwin 10.15.5
✨  Using the hyperkit driver based on user configuration
🔑  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: 
Sorry, try again.
Password: 
Sorry, try again.
Password: 
💿  Downloading VM boot image ...
    > minikube-v1.11.0.iso.sha256: 65 B / 65 B [-------------] 100.00% ? p/s 0s
    > minikube-v1.11.0.iso: 174.99 MiB / 174.99 MiB [] 100.00% 26.42 MiB p/s 7s
👍  Starting control plane node vm_0_10_centos in cluster vm_0_10_centos
💾  Downloading Kubernetes v1.18.3 preload ...
    > preloaded-images-k8s-v3-v1.18.3-docker-overlay2-amd64.tar.lz4: 526.01 MiB
🔥  Creating hyperkit VM (CPUs=2, Memory=4000MB, Disk=20000MB) ...
🐳  Preparing Kubernetes v1.18.3 on Docker 19.03.8 ...
💥  initialization failed, will try again: run: /bin/bash -c "sudo env PATH=/var/lib/minikube/binaries/v1.18.3:$PATH kubeadm init --config /var/tmp/minikube/kubeadm.yaml  --ignore-preflight-errors=DirAvailable--etc-kubernetes-manifests,DirAvailable--var-lib-minikube,DirAvailable--var-lib-minikube-etcd,FileAvailable--etc-kubernetes-manifests-kube-scheduler.yaml,FileAvailable--etc-kubernetes-manifests-kube-apiserver.yaml,FileAvailable--etc-kubernetes-manifests-kube-controller-manager.yaml,FileAvailable--etc-kubernetes-manifests-etcd.yaml,Port-10250,Swap": Process exited with status 3
stdout:

stderr:
W0701 18:15:18.750379    2388 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
nodeRegistration.name: Invalid value: "vm_0_10_centos": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')
To see the stack trace of this error execute with --v=5 or higher


💣  Error starting cluster: run: /bin/bash -c "sudo env PATH=/var/lib/minikube/binaries/v1.18.3:$PATH kubeadm init --config /var/tmp/minikube/kubeadm.yaml  --ignore-preflight-errors=DirAvailable--etc-kubernetes-manifests,DirAvailable--var-lib-minikube,DirAvailable--var-lib-minikube-etcd,FileAvailable--etc-kubernetes-manifests-kube-scheduler.yaml,FileAvailable--etc-kubernetes-manifests-kube-apiserver.yaml,FileAvailable--etc-kubernetes-manifests-kube-controller-manager.yaml,FileAvailable--etc-kubernetes-manifests-etcd.yaml,Port-10250,Swap": Process exited with status 3
stdout:

stderr:
W0701 18:15:18.925475    2419 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
nodeRegistration.name: Invalid value: "vm_0_10_centos": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')
To see the stack trace of this error execute with --v=5 or higher


😿  minikube is exiting due to an error. If the above message is not useful, open an issue:
👉  https://github.com/kubernetes/minikube/issues/new/choose

💣  failed to start node: startup failed: run: /bin/bash -c "sudo env PATH=/var/lib/minikube/binaries/v1.18.3:$PATH kubeadm init --config /var/tmp/minikube/kubeadm.yaml  --ignore-preflight-errors=DirAvailable--etc-kubernetes-manifests,DirAvailable--var-lib-minikube,DirAvailable--var-lib-minikube-etcd,FileAvailable--etc-kubernetes-manifests-kube-scheduler.yaml,FileAvailable--etc-kubernetes-manifests-kube-apiserver.yaml,FileAvailable--etc-kubernetes-manifests-kube-controller-manager.yaml,FileAvailable--etc-kubernetes-manifests-etcd.yaml,Port-10250,Swap": Process exited with status 3
stdout:

stderr:
W0701 18:15:18.925475    2419 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
nodeRegistration.name: Invalid value: "vm_0_10_centos": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')
To see the stack trace of this error execute with --v=5 or higher


😿  minikube is exiting due to an error. If the above message is not useful, open an issue:
👉  https://github.com/kubernetes/minikube/issues/new/choose

[jlucktay]

If it's a matter of limiting valid profile names to align with hostname limitations (refs 1, 2) then I'm willing to put together a PR.