Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

Minikube does not start, kubectl connection to server was refused

Scouring stack overflow solutions for similar problems did not resolve my issue, so hoping to share what I'm currently experiencing to get help debugging this.

So a small preface; I initially installed minikube/kubectl a couple days back. I went ahead and tried following the minikube tutorial today and am now experiencing issues. I'm following the minikube getting started guide.

I am on MacOS. My versions:

$ kubectl version

Client Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.2", GitCommit:"81753b10df112992bf51bbc2c2f85208aad78335", GitTreeState:"clean", BuildDate:"2018-04-27T09:22:21Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"darwin/amd64"}
Unable to connect to the server: net/http: TLS handshake timeout

$ minikube version

minikube version: v0.26.1

$ vboxmanage --version

5.1.20r114629

The following are a string of commands I've tried to check responses..


$ minikube start

Starting VM...
Getting VM IP address...
Moving files into cluster...
E0503 11:08:18.654428   20197 start.go:234] Error updating cluster:  downloading binaries: transferring kubeadm file: &{BaseAsset:{data:[] reader:0xc4200861a8 Length:0 AssetName:/Users/philipyoo/.minikube/cache/v1.10.0/kubeadm TargetDir:/usr/bin TargetName:kubeadm Permissions:0641}}: Error running scp command: sudo scp -t /usr/bin output: : wait: remote command exited without exit status or exit signal

$ minikube status

cluster: Running
kubectl: Correctly Configured: pointing to minikube-vm at 192.168.99.103

Edit:

I don't know what happened, but checking the status again returned "Misconfigured". I ran the recommended command $ minikube update-context and now the $ minikube ip points to "172.17.0.1". Pinging this IP returns request timeouts, 100% packet loss. Double-checked context and I'm still using "minikube" both for context and cluster:

$ kubectl config get-cluster

$ kubectl config get-context


$ kubectl get pods

The connection to the server 192.168.99.103:8443 was refused - did you specify the right host or port?

Reading github issues, I ran into this one: kubernetes#44665. So...

$ ls /etc/kubernetes

ls: /etc/kubernetes: No such file or directory

Only the last few entries

$ minikube logs

May 03 18:10:48 minikube kubelet[3405]: E0503 18:10:47.933251    3405 event.go:209] Unable to write event: 'Patch https://192.168.99.103:8443/api/v1/namespaces/default/events/minikube.152b315ce3475a80: dial tcp 192.168.99.103:8443: getsockopt: connection refused' (may retry after sleeping)
May 03 18:10:49 minikube kubelet[3405]: E0503 18:10:49.160920    3405 reflector.go:205] k8s.io/kubernetes/pkg/kubelet/kubelet.go:465: Failed to list *v1.Service: Get https://192.168.99.103:8443/api/v1/services?limit=500&resourceVersion=0: dial tcp 192.168.99.103:8443: getsockopt: connection refused
May 03 18:10:51 minikube kubelet[3405]: E0503 18:10:51.670344    3405 reflector.go:205] k8s.io/kubernetes/pkg/kubelet/config/apiserver.go:47: Failed to list *v1.Pod: Get https://192.168.99.103:8443/api/v1/pods?fieldSelector=spec.nodeName%3Dminikube&limit=500&resourceVersion=0: dial tcp 192.168.99.103:8443: getsockopt: connection refused
May 03 18:10:53 minikube kubelet[3405]: W0503 18:10:53.017289    3405 status_manager.go:459] Failed to get status for pod "kube-controller-manager-minikube_kube-system(c801aa20d5b60df68810fccc384efdd5)": Get https://192.168.99.103:8443/api/v1/namespaces/kube-system/pods/kube-controller-manager-minikube: dial tcp 192.168.99.103:8443: getsockopt: connection refused
May 03 18:10:53 minikube kubelet[3405]: E0503 18:10:52.595134    3405 rkt.go:65] detectRktContainers: listRunningPods failed: rpc error: code = Unavailable desc = grpc: the connection is unavailable

I'm not exactly sure how to ping an https url, but if I ping the ip

$ kube ping 192.168.99.103

PING 192.168.99.103 (192.168.99.103): 56 data bytes
64 bytes from 192.168.99.103: icmp_seq=0 ttl=64 time=4.632 ms
64 bytes from 192.168.99.103: icmp_seq=1 ttl=64 time=0.363 ms
64 bytes from 192.168.99.103: icmp_seq=2 ttl=64 time=0.826 ms
^C
--- 192.168.99.103 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.363/1.940/4.632/1.913 ms

Looking at kube config file... $ cat ~/.kube/config

apiVersion: v1
clusters:
- cluster:
    insecure-skip-tls-verify: true
    server: https://localhost:6443
  name: docker-for-desktop-cluster
- cluster:
    certificate-authority: /Users/philipyoo/.minikube/ca.crt
    server: https://192.168.99.103:8443
  name: minikube
contexts:
- context:
    cluster: docker-for-desktop-cluster
    user: docker-for-desktop
  name: docker-for-desktop
- context:
    cluster: minikube
    user: minikube
  name: minikube
current-context: minikube
kind: Config
preferences: {}
users:
- name: docker-for-desktop
  user:
    client-certificate-data: <removed>
    client-key-data: <removed>
- name: minikube
  user:
    client-certificate: /Users/philipyoo/.minikube/client.crt
    client-key: /Users/philipyoo/.minikube/client.key

And to make sure my key/crts are there:

$ ls ~/.minikube

addons/              ca.pem*              client.key           machines/            proxy-client.key
apiserver.crt        cache/               config/              profiles/
apiserver.key        cert.pem*            files/               proxy-client-ca.crt
ca.crt               certs/               key.pem*             proxy-client-ca.key
ca.key               client.crt           logs/                proxy-client.crt

Any help in debugging is super appreciated!

like image 752
philip yoo Avatar asked May 03 '18 18:05

philip yoo


People also ask

How does kubectl connect to minikube?

By default, kubectl gets configured to access the kubernetes cluster control plane inside minikube when the minikube start command is executed. You can also alias kubectl for easier usage. Alternatively, you can create a symbolic link to minikube's binary named 'kubectl'. You can also alias kubectl for easier usage.

How fix the the connection to the server localhost 8080 was refused Did you specify the right host or port?

This is a common issue when you run the kubectl command or a similar command. In most cases, Kubernetes does not have the correct credentials to access the cluster. It can be easily resolved easily by setting an environment variable in most similar cases.

Is minikube the same as Kubernetes?

Minikube is a lightweight Kubernetes implementation that creates a VM on your local machine and deploys a simple cluster containing only one node. Minikube is available for Linux, macOS, and Windows systems.

Does minikube support network policy?

A vanilla minikube installation ( minikube start ) does not support any NetworkPolicies, since the default CNI, Kindnet, does not support Network Policies, by design. However, minikube can support NetworkPolicies if a supported CNI, such as Calico, is installed.


1 Answers

For posterity, the solution to this problem was to delete the

.minikube

directory in the user's home directory, and then try again. Often fixes strange minikube problems.

like image 125
Jonah Benton Avatar answered Oct 23 '22 23:10

Jonah Benton