gcp: Update terraform rendering for Target Pool

pkg/model/gcemodel/api_loadbalancer.go

@@ -38,13 +38,6 @@ var _ fi.CloudupModelBuilder = &APILoadBalancerBuilder{}
 // createPublicLB validates the existence of a target pool with the given name,
 // and creates an IP address and forwarding rule pointing to that target pool.
 func createPublicLB(b *APILoadBalancerBuilder, c *fi.CloudupModelBuilderContext) error {
-	// TODO: point target pool to instance group managers, as done in internal LB.
-	targetPool := &gcetasks.TargetPool{
-		Name:      s(b.NameForTargetPool("api")),
-		Lifecycle: b.Lifecycle,
-	}
-	c.AddTask(targetPool)
-
 	healthCheck := &gcetasks.HTTPHealthcheck{
 		Name:        s(b.NameForHealthcheck("api")),
 		Port:        i64(wellknownports.KubeAPIServerHealthCheck),
@@ -53,6 +46,14 @@ func createPublicLB(b *APILoadBalancerBuilder, c *fi.CloudupModelBuilderContext)
 	}
 	c.AddTask(healthCheck)
 
+	// TODO: point target pool to instance group managers, as done in internal LB.
+	targetPool := &gcetasks.TargetPool{
+		Name:        s(b.NameForTargetPool("api")),
+		HealthCheck: healthCheck,
+		Lifecycle:   b.Lifecycle,
+	}
+	c.AddTask(targetPool)
+
 	poolHealthCheck := &gcetasks.PoolHealthCheck{
 		Name:        s(b.NameForPoolHealthcheck("api")),
 		Healthcheck: healthCheck,

tests/integration/update_cluster/minimal_gce_plb/kubernetes.tf

@@ -565,9 +565,8 @@ resource "google_compute_subnetwork" "us-test1-minimal-gce-plb-example-com" {
 }
 
 resource "google_compute_target_pool" "api-minimal-gce-plb-example-com" {
-  description      = ""
+  health_checks = [google_compute_http_health_check.api-minimal-gce-plb-example-com.self_link]
   name          = "api-minimal-gce-plb-example-com"
-  session_affinity = ""
 }
 
 resource "google_project_iam_binding" "serviceaccount-control-plane" {

upup/pkg/fi/cloudup/gcetasks/httphealthcheck.go

@@ -113,6 +113,6 @@ func (_ *HTTPHealthcheck) RenderTerraform(t *terraform.TerraformTarget, a, e, ch
 	return t.RenderResource("google_compute_http_health_check", *e.Name, tf)
 }
 
-func (e *HTTPHealthcheck) TerraformAddress() *terraformWriter.Literal {
+func (e *HTTPHealthcheck) TerraformLink() *terraformWriter.Literal {
-	return terraformWriter.LiteralProperty("google_compute_http_health_check", *e.Name, "id")
+	return terraformWriter.LiteralSelfLink("google_compute_http_health_check", *e.Name)
 }

upup/pkg/fi/cloudup/gcetasks/targetpool.go

@@ -31,6 +31,8 @@ import (
 // +kops:fitask
 type TargetPool struct {
 	Name        *string
+	HealthCheck *HTTPHealthcheck
+
 	Lifecycle fi.Lifecycle
 }
 
@@ -56,6 +58,7 @@ func (e *TargetPool) Find(c *fi.CloudupContext) (*TargetPool, error) {
 	actual.Name = fi.PtrTo(r.Name)
 
 	// Avoid spurious changes
+	actual.HealthCheck = e.HealthCheck
 	actual.Lifecycle = e.Lifecycle
 
 	return actual, nil
@@ -105,10 +108,7 @@ func (_ *TargetPool) RenderGCE(t *gce.GCEAPITarget, a, e, changes *TargetPool) e
 
 type terraformTargetPool struct {
 	Name         string                     `cty:"name"`
-	Description     string   `cty:"description"`
+	HealthChecks []*terraformWriter.Literal `cty:"health_checks"`
-	HealthChecks    []string `cty:"health_checks"`
-	Instances       []string `cty:"instances"`
-	SessionAffinity string   `cty:"session_affinity"`
 }
 
 func (_ *TargetPool) RenderTerraform(t *terraform.TerraformTarget, a, e, changes *TargetPool) error {
@@ -116,6 +116,9 @@ func (_ *TargetPool) RenderTerraform(t *terraform.TerraformTarget, a, e, changes
 
 	tf := &terraformTargetPool{
 		Name: name,
+		HealthChecks: []*terraformWriter.Literal{
+			e.HealthCheck.TerraformLink(),
+		},
 	}
 
 	return t.RenderResource("google_compute_target_pool", name, tf)