Include workload pool specs in chart values

It's useful for any virtual cluster chart to be able to create objects
based on the workload pool specs, which aren't otherwise processed by
the controller.

This only really makes sense in the context of #248 (which made the
vcluster chart a subchart, leaving room for the _parent_ chart to have
its own templates).

Author: squaremo

pkg/provisioners/helmapplications/virtualcluster/provisioner.go

@@ -19,6 +19,7 @@ package virtualcluster
 import (
 	"context"
 	"crypto/sha256"
+	"errors"
 	"fmt"
 
 	"github.com/prometheus/client_golang/prometheus"
@@ -43,6 +44,10 @@ var (
 	})
 )
 
+var (
+	errNoVKCInContext = errors.New("no VirtualKubernetesCluster in context")
+)
+
 //nolint:gochecknoinits
 func init() {
 	metrics.Registry.MustRegister(durationMetric)
@@ -84,7 +89,13 @@ func (p *Provisioner) Values(ctx context.Context, version unikornv1core.Semantic
 	// and the cost is "what you use", we'll need to worry about billing, so it may
 	// be prudent to add organization, project and cluster labels to pods.
 	// We use SNI to demutiplex at the ingress to the correct vcluster instance.
-	hostname := p.ReleaseName(ctx) + "." + p.domain
+	vkc, ok := application.FromContext(ctx).(*unikornv1.VirtualKubernetesCluster)
+	if !ok {
+		return nil, errNoVKCInContext
+	}
+
+	releaseName := p.ReleaseName(ctx)
+	hostname := releaseName + "." + p.domain
 
 	// Allow users to actually hit the cluster.
 	ingress := map[string]any{
@@ -185,7 +196,21 @@ func (p *Provisioner) Values(ctx context.Context, version unikornv1core.Semantic
 		"policies":         policies,
 		"sync":             sync,
 		"exportKubeConfig": kubeConfig,
+		"workloadPools":    workloadPoolsAsValues(vkc),
 	}
 
 	return values, nil
 }
+
+func workloadPoolsAsValues(vkc *unikornv1.VirtualKubernetesCluster) []any {
+	pools := make([]any, len(vkc.Spec.WorkloadPools))
+	for i, pool := range vkc.Spec.WorkloadPools {
+		pools[i] = map[string]any{
+			"name":     pool.Name,
+			"replicas": pool.Replicas,
+			"flavorId": pool.FlavorID,
+		}
+	}
+
+	return pools
+}