Troubleshooting Controlplane Nodes
This section applies to nodes with the controlplane
role.
Check if the Controlplane Containers are Running
There are three specific containers launched on nodes with the controlplane
role:
-
kube-apiserver
-
kube-controller-manager
-
kube-scheduler
The containers should have status Up. The duration shown after Up is the time the container has been running.
docker ps -a -f=name='kube-apiserver|kube-controller-manager|kube-scheduler'
Example output:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 26c7159abbcc rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-apiserver f3d287ca4549 rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-scheduler bdf3898b8063 rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-controller-manager
Controlplane Container Logging
If you added multiple nodes with the |
The logging of the containers can contain information on what the problem could be.
docker logs kube-apiserver docker logs kube-controller-manager docker logs kube-scheduler