# Top level cluster configuration.

local kube = import "../../kube/kube.libsonnet";
local coredns = import "lib/coredns.libsonnet";
local metrics = import "lib/metrics.libsonnet";
local calico = import "lib/calico.libsonnet";
local metallb = import "lib/metallb.libsonnet";

local Cluster(fqdn) = {
    local cluster = self,

    // These are required to let the API Server contact kubelets.
    crAPIServerToKubelet: kube.ClusterRole("system:kube-apiserver-to-kubelet") {
        metadata+: {
            annotations+: {
                "rbac.authorization.kubernetes.io/autoupdate": "true",
            },
            labels+: {
                "kubernets.io/bootstrapping": "rbac-defaults",
            },
        },
        rules: [
            {
                apiGroups: [""],
                resources: ["nodes/%s" % r for r in [ "proxy", "stats", "log", "spec", "metrics" ]],
                verbs: ["*"],
            },
        ],
    },
    crbAPIServer: kube.ClusterRoleBinding("system:kube-apiserver") {
        roleRef: {
            apiGroup: "rbac.authorization.k8s.io",
            kind: "ClusterRole",
            name: cluster.crAPIServerToKubelet.metadata.name,
        },
        subjects: [
            {
                apiGroup: "rbac.authorization.k8s.io",
                kind: "User",
                # A cluster API Server authenticates with a certificate whose CN is == to the FQDN of the cluster.
                name: fqdn,
            },
        ],
    },

    // Calico network fabric
    calico: calico.Environment {},
    // CoreDNS for this cluster.
    dns: coredns.Environment {},
    // Metrics Server
    metrics: metrics.Environment {},
    // Metal Load Balancer
    metallb: metallb.Environment {},
};


{
    k0: Cluster("k0.hswaw.net"),
}