🐛 GetNodeIP returns first ready node

[Evan-Whitehouse]

What this PR does / why we need it:

The current implementation of kubectl-vc gets the first node in a cluster and stores its IP for the kubeconfig if the vc is set up with a nodeport service. This can cause issues if the chosen node's kubeproxy is down. Changing this to only select a ready node seems safer.

Before:

// GetNodeIP returns a node IP address
func GetNodeIP(cli client.Client) (string, error) {
    nodeLst := &corev1.NodeList{}
    if err := cli.List(context.TODO(), nodeLst); err != nil {
        return "", err
    }
    if len(nodeLst.Items) == 0 {
        return "", errors.New("there is no available nodes")
    }
        for _, addr := range nodeLst[0].Status.Addresses {
            if addr.Type == corev1.NodeInternalIP {
            return addr.Address, nil
            }
    }
    return "", errors.New("there is no 'NodeInternalIP' type address")
}

After:

// GetNodeIP returns a node IP address
func GetNodeIP(cli client.Client) (string, error) {
    nodeLst := &corev1.NodeList{}
    if err := cli.List(context.TODO(), nodeLst); err != nil {
        return "", err
    }
    if len(nodeLst.Items) == 0 {
        return "", errors.New("there is no available nodes")
    }

    for _, node := range nodeLst.Items {
        // Check if the node has the ready status condition
        for _, condition := range node.Status.Conditions {
            if condition.Type == corev1.NodeReady && condition.Status == corev1.ConditionTrue {
                //Look for internal IP
                for _, addr := range node.Status.Addresses {
                    if addr.Type == corev1.NodeInternalIP {
                        return addr.Address, nil
                    }
                }
            }
        }
    }

    return "", errors.New("there is no 'NodeInternalIP' type address with Ready status")
}

[linux-foundation-easycla[bot]]

The committers listed above are authorized under a signed CLA.

• :white_check_mark: login: Evan-Whitehouse (e3c04b7212d38f4c407a9aecd129ccf53fbbaab8, f7c1015a162f60024f27db37bd0b577f1d35d374)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @Evan-Whitehouse. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[christopherhein]

ok-to-test

[christopherhein]

/ok-to-test

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Evan-Whitehouse, Fei-Guo

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Needs approval from an approver in each of these files: - ~~[virtualcluster/OWNERS](https://github.com/kubernetes-sigs/cluster-api-provider-nested/blob/main/virtualcluster/OWNERS)~~ [Fei-Guo] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment