Kubernets Issues

Problem

Unable to access Kube API as anonymous user.

Cause

Anonymous user role is not created to access Kube API

Fix

Create Role binding to access Kubectl API through webapplication as anonymous user

• kubectl create rolebinding anonymous --clusterrole=cluster-admin --user=system:anonymous --namespace=default

Problem

User "system:serviceaccount:default:default" cannot list pods in the namespace "default"

Cause

Cluster role binding to services has not been performed.

Fix

Use the below command to create the cluster role and bind all services

• kubectl create clusterrolebinding serviceaccounts-cluster-admin --clusterrole=cluster-admin --group=system:serviceaccounts

Problem

Slaves are connected but not visible from master

Cause

Mismatch between the kubernetes master version and slave version

Fix

To install a specific version kubernetes below command will help, execute this in both kubernetes master and slaves

• apt-get install -y kubeadm=1.6.4-00 kubectl=1.6.4-00 kubelet=1.6.4-00 kubernetes-cni