remove_node_label

Remove specific labels from Kubernetes nodes to manage resource organization and configuration across clusters. Specify context, node name, and label key for targeted label removal.

Instructions

Remove a label from a node.

Args: context_name: The Kubernetes context name node_name: The name of the node to modify label_key: The label key to remove

Returns: JSON string containing the updated node labels

Input Schema

TableJSON Schema

Name	Required	Description	Default
`context_name`	Yes
`node_name`	Yes
`label_key`	Yes

Implementation Reference

tools/node.py:141-187 (handler)

The handler function for the 'remove_node_label' tool. It removes the specified label from the given Kubernetes node by patching the node's metadata.labels using the Kubernetes CoreV1 API. Includes decorators for registration (@mcp.tool()) and context (@use_current_context). Returns JSON with updated labels or a message if label not found.

@mcp.tool()
@use_current_context
def remove_node_label(context_name: str, node_name: str, label_key: str):
    """
    Remove a label from a node.

    Args:
        context_name: The Kubernetes context name
        node_name: The name of the node to modify
        label_key: The label key to remove

    Returns:
        JSON string containing the updated node labels
    """
    core_v1: CoreV1Api = get_api_clients(context_name)["core"]

    # Get the current node
    node = core_v1.read_node(node_name)

    # Check if the node has labels
    if not node.metadata.labels or label_key not in node.metadata.labels:
        result = {
            "name": node_name,
            "labels": node.metadata.labels,
            "message": f"Label '{label_key}' not found on node"
        }
        return json.dumps(result)

    # Update the labels
    labels = dict(node.metadata.labels)
    del labels[label_key]

    # Apply the patch
    body = {
        "metadata": {
            "labels": labels
        }
    }

    patched_node = core_v1.patch_node(node_name, body)

    result = {
        "name": patched_node.metadata.name,
        "labels": patched_node.metadata.labels
    }

    return json.dumps(result)

k8s-pilot