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a0s/metallb-k8s.tf

Created March 17, 2021 19:42
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  1. a0s created this gist Mar 17, 2021.
    91 changes: 91 additions & 0 deletions metallb-k8s.tf
    View file
    Original file line number Diff line number Diff line change
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    # Input

    # local.kube_config_path - path to kubeconfig.yml
    # local.external_ips - list of external ips

    # Providers

    terraform {
    required_providers {
    kubernetes = {
    source = "hashicorp/kubernetes"
    version = "2.0.2"
    }

    kubectl = {
    source = "gavinbunney/kubectl"
    version = "1.10.0"
    }

    http = {
    source = "hashicorp/http"
    version = "2.1.0"
    }
    }
    }

    provider "kubernetes" {
    config_path = local.kube_config_path
    }

    provider "kubectl" {
    config_path = local.kube_config_path
    }


    # MetalLB config

    resource "kubernetes_namespace" "metallb" {
    metadata {
    name = "metallb-system"
    }
    }

    resource "kubernetes_config_map" "metallb_config" {
    metadata {
    namespace = kubernetes_namespace.metallb.metadata[0].name
    name = "config"
    }
    data = {
    config = <<YAML
    address-pools:
    - name: custom-ip-space
    protocol: layer2
    addresses:
    %{ for addr in toset(local.external_ips) ~}
    - ${addr}/32
    %{ endfor ~}
    YAML
    }
    }

    resource "random_id" "metallb_memberlist" {
    byte_length = 128
    }

    resource "kubernetes_secret" "metallb_memberlist" {
    metadata {
    name = "memberlist"
    namespace = kubernetes_namespace.metallb.metadata[0].name
    }
    data = {
    secretkey = random_id.metallb_memberlist.b64_std
    }
    }

    data "http" "metallb" {
    url = "https://raw.githubusercontent.com/metallb/metallb/v0.9.5/manifests/metallb.yaml"
    }

    data "kubectl_file_documents" "metallb" {
    content = data.http.metallb.body
    }

    resource "kubectl_manifest" "metallb" {
    depends_on = [
    kubernetes_secret.metallb_memberlist,
    kubernetes_config_map.metallb_config
    ]
    count = length(data.kubectl_file_documents.metallb.documents)
    yaml_body = element(data.kubectl_file_documents.metallb.documents, count.index)
    }