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title: Kubernetes Components
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weight: 100
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---
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The commands and steps listed in this section apply to the core Kubernetes components on [Rancher Launched Kubernetes]({{<baseurl>}}/rancher/v2.0-v2.4/en/cluster-provisioning/rke-clusters/) clusters.
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This section includes troubleshooting tips in the following categories:
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- [Troubleshooting etcd Nodes]({{<baseurl>}}/rancher/v2.0-v2.4/en/troubleshooting/kubernetes-components/etcd)
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- [Troubleshooting Controlplane Nodes]({{<baseurl>}}/rancher/v2.0-v2.4/en/troubleshooting/kubernetes-components/controlplane)
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- [Troubleshooting nginx-proxy Nodes]({{<baseurl>}}/rancher/v2.0-v2.4/en/troubleshooting/kubernetes-components/nginx-proxy)
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- [Troubleshooting Worker Nodes and Generic Components]({{<baseurl>}}/rancher/v2.0-v2.4/en/troubleshooting/kubernetes-components/worker-and-generic)
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# Kubernetes Component Diagram
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<br/>
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<sup>Lines show the traffic flow between components. Colors are used purely for visual aid</sup>
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# Controlplane Container Logging
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> **Note:** If you added multiple nodes with the `controlplane` role, both `kube-controller-manager` and `kube-scheduler` use a leader election process to determine the leader. Only the current leader will log the performed actions. See [Kubernetes leader election]({{<baseurl>}}/rancher/v2.0-v2.4/en/troubleshooting/kubernetes-resources/#kubernetes-leader-election) how to retrieve the current leader.
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> **Note:** If you added multiple nodes with the `controlplane` role, both `kube-controller-manager` and `kube-scheduler` use a leader election process to determine the leader. Only the current leader will log the performed actions. See [Kubernetes leader election](../other-troubleshooting-tips/kubernetes-resources.md#kubernetes-leader-election) how to retrieve the current leader.
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The logging of the containers can contain information on what the problem could be.
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