Kubernetes help. Kube-dns crashloopbackoff

ranganath-t

Need help with kubernetes.

I have installed kuberentes in my centos 7.2 machine. When i type kubectl get pods --all-namespaces

I see the kube-dns has an error saying crashloopbackoff. I am unable to find the exact problem.

Somebody help on this ?

JaredBusch

New to CentOS 7?
Disable SELinux and try again.

setenforce 0

If things work, then you can work on resolving the SELinux security concerns.

ranganath-t

swapoff -a

setenforce 0

installed docker, kubeadm, kubelet, kubectl

enabled and started docker

Checked the cgroup driver for both docker and kube to be same with cgroupfs

kubeadm init with cidr range 10.244.0.0/2

and kubectl get pods --all-namespaces

Kube-dns crashbackloopoff.

JaredBusch

@ranganath-t said in Kubernetes help. Kube-dns crashloopbackoff:

swapoff -a

setenforce 0

installed docker, kubeadm, kubelet, kubectl

enabled and started docker

Checked the cgroup driver for both docker and kube to be same with cgroupfs

kubeadm init with cidr range 10.244.0.0/2

and kubectl get pods --all-namespaces

Kube-dns crashbackloopoff.

Did you reboot someplace in there? Because setenforce 0 does not survive a reboot.

ranganath-t

I have disabled selinux=disabled.

ranganath-t

fyi, i did not reboot the machine at all

JaredBusch

Well, then I am no further help as I have not tried to use this container before.

travisdh1

I've not used kubernetes either, but, do you have an error log from when you tried to start it? Probably in /var/log and something like kube.log.

Also, are any nameservers listed in /etc/resolve.conf? Network settings like to drop the DNS server setting once in a while, and the DNS error might be caused by this.

stacksofplates

Did you follow this from the kubeadm install setups?

I've done a cluster setup a couple of times and haven't run into this.