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Not to be rude, have you used a search engine for your query or read any K8s/k3s documentation? Everything you need to know can be found in the documentation.

Sure, let's delve into the K3s specific context for these arguments. K3s is a lightweight Kubernetes distribution designed for edge and IoT environments, and it comes with specific flags tailored to its use case. 1.

--node-ip

: In K3s, the

--node-ip

flag is used to specify the IP address for the agent (or worker node) to use. If a node has multiple network interfaces, this flag can be used to explicitly define the IP address that the kubelet should use for communication with other components within the Kubernetes cluster. This IP must be reachable by the rest of the cluster. 2.

--external-node-ip

: The

--external-node-ip

flag is used to specify an external IP for the node, which is different from the node's internal IP address used for intra-cluster communication. This is useful in scenarios where you might have a private network inside the cluster and another network that you use to expose services externally. This flag ensures that the correct IP is advertised for external access. 3.

--flannel-external-ip

: This specific flag is used to define the external IP address for Flannel to use within K3s. Flannel is a networking overlay used in K3s, and if your node has multiple interfaces or IP addresses, this flag allows you to specify which one Flannel should use. The selected IP address must be reachable by all nodes in the cluster if it's to function correctly. These flags in K3s give you control over the networking setup and allow for flexibility in different environments, whether it's in a multi-interface setup, hybrid cloud, or edge computing scenario. Proper understanding and configuration of these flags can help ensure that your K3s cluster operates smoothly, especially in complex networking environments. Always refer to the official K3s documentation for the specific version you are using to ensure compatibility and proper usage.