why is Kuberenetes kubeadm init command unable to pull the images from the repository k8s.gcr.io

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I have 2 vms that run a kubernetes master and a slave node that i have setup locally. Till now everything was working fine but suddenly it started giving errors when I try to start the master with kubeadm init command.I have cpppied the error below.

shayeeb@ubuntu:~$ sudo kubeadm init [init] using Kubernetes version: v1.11.1 [preflight] running pre-flight checks I0718 11:04:57.038464   20370 kernel_validator.go:81] Validating kernel version I0718 11:04:57.038896   20370 kernel_validator.go:96] Validating kernel config [preflight/images] Pulling images required for setting up a Kubernetes cluster [preflight/images] This might take a minute or two, depending on the speed of your internet connection [preflight/images] You can also perform this action in beforehand using 'kubeadm config images pull' [preflight] Some fatal errors occurred: [ERROR ImagePull]: failed to pull image [k8s.gcr.io/kube-apiserver-amd64:v1.11.1]: exit status 1 [ERROR ImagePull]: failed to pull image [k8s.gcr.io/kube-controller-manager-amd64:v1.11.1]: exit status 1 [ERROR ImagePull]: failed to pull image [k8s.gcr.io/kube-scheduler-amd64:v1.11.1]: exit status 1 [ERROR ImagePull]: failed to pull image [k8s.gcr.io/kube-proxy-amd64:v1.11.1]: exit status 1 [preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...` 

 


You can also run following command rather than writing the yaml,

kubeadm init --kubernetes-version=1.11.0 --apiserver-advertise-address=<public_ip> --apiserver-cert-extra-sans=<private_ip> 

If you are using flannel network run following commad,

kubeadm init --kubernetes-version=1.11.0 --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=<public_ip> --apiserver-cert-extra-sans=<internal_ip>  

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