New data source: kubernetes_all_nodes

[jbarnes7952]

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Description

Add new data source kubernetes_all_nodes.

Potential Terraform Configuration

main.tf:

data "kubernetes_all_nodes" "test" {

}

output "test" {
        value = data.kubernetes_all_nodes.test
}

Output:

test = {
  "id" = "d1c9507ab3e33ed071fb9d16472665fab4c99639bec5534a45d28bc1f9d74105"
  "nodes" = [
    "k8s-master",
    "k8s-worker-1",
    "k8s-worker-2",
    "k8s-worker-3",
  ]
}

References

Community Note

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[redeux]

Hi John. Thanks for the issue. Would you mind describing your use case for the proposed kubernetes_all_nodes data source?

[jbarnes7952]

https://registry.terraform.io/providers/hashicorp/kubernetes/latest/docs/resources/persistent_volume_claim

A persistent_volume_claim can have an affinity for a particular node.

for example:

resource "kubernetes_persistent_volume" "consul-server-2" {
    metadata {
        labels           = {
            "type" = "local"
        }
        name             = "consul-server-2"
    }

    spec {
        access_modes                     = [
            "ReadWriteOnce",
        ]
        capacity                         = {
            "storage" = "100Gi"
        }
        mount_options                    = []
        persistent_volume_reclaim_policy = "Delete"
        storage_class_name               = "manual"
        volume_mode                      = "Filesystem"

        node_affinity {
            required {
                node_selector_term {
                    match_expressions {
                        key      = "kubernetes.io/hostname"
                        operator = "In"
                        values   = [
                           *"k8s-worker-3",    <<--------- HERE
                        ]
                    }
                }
            }
        }

        persistent_volume_source {

            host_path {
                path = "/mnt/data"
            }
        }
    }
}

Absent the data source, these must be hard coded.

[xuxant]

@redeux I too have the use case for the kubernetes_all_nodes. For mine, i wanted to create the tls certificates that is applicable for all the nodes. Here we can get the hostname of all the nodes name and we can use it to create the self sign certificates.

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