kubernetes-init/modules/flux/main.tf

# Install

data "flux_install" "main" {
  target_path    = var.path
  network_policy = false
  version        = "latest"
}

resource "kubernetes_namespace" "flux_system" {
  metadata {
    name = var.namespace
  }

  lifecycle {
    ignore_changes = [
      metadata[0].labels,
    ]
  }
}

data "kubectl_file_documents" "apply" {
  content = data.flux_install.main.content
}

# Convert documents list to include parsed yaml data
locals {
  apply = [for v in data.kubectl_file_documents.apply.documents : {
    data : yamldecode(v)
    content : v
    }
  ]
}

# Apply manifests on the cluster
resource "kubectl_manifest" "apply" {
  for_each   = { for v in local.apply : lower(join("/", compact([v.data.apiVersion, v.data.kind, lookup(v.data.metadata, "namespace", ""), v.data.metadata.name]))) => v.content }
  depends_on = [kubernetes_namespace.flux_system]
  yaml_body  = each.value
}

# Sync

data "flux_sync" "main" {
  target_path = var.path
  url         = var.url
  branch      = var.branch
}

# Split multi-doc YAML with
# https://registry.terraform.io/providers/gavinbunney/kubectl/latest
data "kubectl_file_documents" "sync" {
  content = data.flux_sync.main.content
}

# Convert documents list to include parsed yaml data
locals {
  sync = [for v in data.kubectl_file_documents.sync.documents : {
    data : yamldecode(v)
    content : v
    }
  ]
}

# Apply manifests on the cluster
resource "kubectl_manifest" "sync" {
  for_each   = { for v in local.sync : lower(join("/", compact([v.data.apiVersion, v.data.kind, lookup(v.data.metadata, "namespace", ""), v.data.metadata.name]))) => v.content }
  depends_on = [kubernetes_namespace.flux_system]
  yaml_body  = each.value
}

locals {
  known_hosts = <<EOT
git.front.kjuulh.io ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGJdO0Tw0e/Fa78g1Xszc4oKaOPbTwl7RTAaGQb0TrV8
git.front.kjuulh.io ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBO61xoa0ON2Y8rpIB6R9PFxg9HUxMym8Z5I4vYUC+/UnzaDx9YUEGo3Vig9wBo6Hc2lAp0BIwH/d5d6uBBEIj/Y=
EOT
}

# Generate a Kubernetes secret with the Git credentials
resource "kubernetes_secret" "main" {
  depends_on = [kubectl_manifest.apply]

  metadata {
    name      = data.flux_sync.main.secret
    namespace = data.flux_sync.main.namespace
  }

  data = {
    identity = var.ssh_private_key_pem
    "identity.pub" = var.ssh_public_key_pem
    #    identity       = <<EOT
    #-----BEGIN OPENSSH PRIVATE KEY-----
    #b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
    #QyNTUxOQAAACBYZYPLAjLRZhUHfk4yTLmiQTDmdWPIgZTI+dGLgpY/GAAAAJgGvLdRBry3
    #UQAAAAtzc2gtZWQyNTUxOQAAACBYZYPLAjLRZhUHfk4yTLmiQTDmdWPIgZTI+dGLgpY/GA
    #AAAEBmqJkdSt8H6HIVzV6Na8ukBOj4Bywd970sQVPWAz8Ug1hlg8sCMtFmFQd+TjJMuaJB
    #MOZ1Y8iBlMj50YuClj8YAAAAEWNvbnRhY3RAa2p1dWxoLmlvAQIDBA==
    #-----END OPENSSH PRIVATE KEY-----
    #EOT
    #    "identity.pub" = <<EOT
    #ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFhlg8sCMtFmFQd+TjJMuaJBMOZ1Y8iBlMj50YuClj8Y contact@kjuulh.io
    #EOT
    known_hosts    = local.known_hosts
  }
}