constellation/operators/constellation-node-operator/internal/node/node.go

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/*
Copyright (c) Edgeless Systems GmbH
SPDX-License-Identifier: AGPL-3.0-only
*/
package node
import (
"errors"
"regexp"
updatev1alpha1 "github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/api/v1alpha1"
corev1 "k8s.io/api/core/v1"
)
const controlPlaneRoleLabel = "node-role.kubernetes.io/control-plane"
var reservedHostRegex = regexp.MustCompile(`^(.+\.|)(kubernetes|k8s)\.io(/.*)?$`)
// Ready checks if a kubernetes node has the `NodeReady` condition set to true.
func Ready(node *corev1.Node) bool {
for _, cond := range node.Status.Conditions {
if cond.Type == corev1.NodeReady {
return cond.Status == corev1.ConditionTrue
}
}
return false
}
// VPCIP returns the VPC IP of a node.
func VPCIP(node *corev1.Node) (string, error) {
for _, addr := range node.Status.Addresses {
if addr.Type == corev1.NodeInternalIP {
return addr.Address, nil
}
}
return "", errors.New("no VPC IP found")
}
// IsControlPlaneNode returns true if the node is a control plane node.
func IsControlPlaneNode(node *corev1.Node) bool {
_, ok := node.Labels[controlPlaneRoleLabel]
return ok
}
// FindPending searches for a pending node that matches a node.
// The pending node has to have the goal to join the cluster and be reported as ready be the CSP.
// if the node is not found, nil is returned.
func FindPending(pendingNodes []updatev1alpha1.PendingNode, node *corev1.Node) *updatev1alpha1.PendingNode {
if node == nil {
return nil
}
for _, pendingNode := range pendingNodes {
if pendingNode.Spec.Goal == updatev1alpha1.NodeGoalJoin && pendingNode.Spec.NodeName == node.Name && pendingNode.Status.CSPNodeState == updatev1alpha1.NodeStateReady {
return &pendingNode
}
}
return nil
}
// FilterLabels removes reserved node labels from a map of labels.
// reference: https://kubernetes.io/docs/reference/labels-annotations-taints/ .
func FilterLabels(labels map[string]string) map[string]string {
result := make(map[string]string)
for key, val := range labels {
if reservedHostRegex.MatchString(key) {
continue
}
result[key] = val
}
return result
}