Kube-system namespace

kube-system namespace

• Components: coredns, aws-node, kube-proxy, aws-load-balancer-controller

kubectl -n kube-system 
kubectl -n kube-system get pods

kubectl describe -n kube-system configmap/aws-auth

kubectl get sa -n kube-system
kubectl describe sa -n kube-system
kubectl get configmap -n kube-system

Helm install:

• helm install aws-cloudwatch-metrics --namespace kube-system eks/aws-cloudwatch-metrics
• helm install aws-load-balancer-controller

kubectl -n kube-system -l=k8s-app=kube-dns get pods
NAME                      READY   STATUS    RESTARTS   AGE
coredns-f47955f89-7ntw4   0/1     Pending   0          3h37m
coredns-f47955f89-sl79r   0/1     Pending   0          3h37m

kubectl -n kube-system -l=k8s-app=kube-dns get pods
NAME                      READY   STATUS    RESTARTS   AGE
coredns-f47955f89-d95dd   1/1     Running   0          45h
coredns-f47955f89-w746j   1/1     Running   0          45h

• kubectl get deployment metrics-server -n kube-system
• kubectl get secrets -n kube-system
• kubectl -n kube-system

Errors

• kube-system 43m Warning ClusterUnhealthy configmap/cluster-autoscaler-status
• Cluster has no ready nodes

Related

• kubectl get namespaces
• kubectl get daemonset
• kube-dns, kube-system Namespace
• coredns
• aws-node
• kube-public
• kube-node-lease
• kubectl edit service
• kubectl edit configmap
• kubectl describe secret -A

See also

• kube-system: kubectl get pods -n kube-system, kube-dns, aws-node
• Kubernetes namespaces: kubectl get namespaces, kube-system namespace, --namespace