kmaster: cp: cannot stat ‘/etc/kubernetes/admin.conf’: No such file or directory about kubernetes

[justmeandopensource]

@kamal2222ahmed
I just cloned this repo and tested. It worked perfectly fine on my Linux workstation.
In the shell provisioning script, I have redirected the output of individual commands to /dev/null.
You could delete those redirection and see what actually is going on.

Edit the below two files

• bootstrap.sh
• bootstrap_kmaster.sh

Remove ">/dev/null 2>&1" on all lines where it is present on these two files and run vagrant up again. This time you will see lots of output of individual commands during provisioning. This will help you identify where it is failing.

[taohexxx]

I can reproduce this issue. It's caused by kubeadm init failure.

$ kubeadm init --apiserver-advertise-address=172.42.42.100 --pod-network-cidr=192.168.0.0/16
W0224 15:28:18.634562   31429 validation.go:28] Cannot validate kubelet config - no validator is available
W0224 15:28:18.634619   31429 validation.go:28] Cannot validate kube-proxy config - no validator is available
[init] Using Kubernetes version: v1.17.3
[preflight] Running pre-flight checks
	[WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
error execution phase preflight: [preflight] Some fatal errors occurred:
	[ERROR ImagePull]: failed to pull image k8s.gcr.io/kube-apiserver:v1.17.3: output: Error response from daemon: Get https://k8s.gcr.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
, error: exit status 1
	[ERROR ImagePull]: failed to pull image k8s.gcr.io/kube-controller-manager:v1.17.3: output: Error response from daemon: Get https://k8s.gcr.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
, error: exit status 1
	[ERROR ImagePull]: failed to pull image k8s.gcr.io/kube-scheduler:v1.17.3: output: Error response from daemon: Get https://k8s.gcr.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
, error: exit status 1
	[ERROR ImagePull]: failed to pull image k8s.gcr.io/kube-proxy:v1.17.3: output: Error response from daemon: Get https://k8s.gcr.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
, error: exit status 1
	[ERROR ImagePull]: failed to pull image k8s.gcr.io/pause:3.1: output: Error response from daemon: Get https://k8s.gcr.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
, error: exit status 1
	[ERROR ImagePull]: failed to pull image k8s.gcr.io/etcd:3.4.3-0: output: Error response from daemon: Get https://k8s.gcr.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
, error: exit status 1
	[ERROR ImagePull]: failed to pull image k8s.gcr.io/coredns:1.6.5: output: Error response from daemon: Get https://k8s.gcr.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
, error: exit status 1
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`
To see the stack trace of this error execute with --v=5 or higher

In some country (e.g. China), Google services are unavailable. Use kubeadm init --image-repository=registry.aliyuncs.com/google_containers in bootstrap*.sh solved.

I also have to use this repo instead of Google's in bootstrap.sh:

cat >>/etc/yum.repos.d/kubernetes.repo<<EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
        https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

[velan-techlab]

Same bug happen
kmaster: cp: cannot stat ‘/etc/kubernetes/admin.conf’: No such file or directory

it is fixed by changing kubernetes version in bootstap.sh
yum install -y -q kubeadm-1.18.0 kubelet-1.18.0 kubectl-1.18.0

[satya666-cyber]

kmaster: cp: cannot stat ‘/etc/kubernetes/admin.conf’: No such file or directory

how to solve this