remove bootstrap pods from cluster, and render in hosts' context

cmd/dkl-dir2config/render-context.go

@@ -5,9 +5,11 @@ import (
 	"crypto/sha1"
 	"encoding/hex"
 	"fmt"
+	"io"
 	"log"
 	"path"
 	"reflect"
+	"strings"
 
 	yaml "gopkg.in/yaml.v2"
 
@@ -154,6 +156,12 @@ func (ctx *renderContext) Config() string {
 }
 
 func (ctx *renderContext) renderConfig(configTemplate *clustersconfig.Template) string {
+	buf := new(strings.Builder)
+	ctx.renderConfigTo(buf, configTemplate)
+	return buf.String()
+}
+
+func (ctx *renderContext) renderConfigTo(buf io.Writer, configTemplate *clustersconfig.Template) {
 	ctxName := ctx.Name()
 
 	ctxMap := ctx.asMap()
@@ -189,7 +197,7 @@ func (ctx *renderContext) renderConfig(configTemplate *clustersconfig.Template)
 	}
 
 	extraFuncs["bootstrap_pods_files"] = func(dir string) (string, error) {
-		namePods := renderBootstrapPods(ctx.Cluster)
+		namePods := ctx.renderBootstrapPods()
 
 		defs := make([]config.FileDef, 0)
 
@@ -217,12 +225,9 @@ func (ctx *renderContext) renderConfig(configTemplate *clustersconfig.Template)
 		return hex.EncodeToString(ba[:])
 	}
 
-	buf := bytes.NewBuffer(make([]byte, 0, 4096))
 	if err := configTemplate.Execute(ctxName, "config", buf, ctxMap, extraFuncs); err != nil {
 		log.Fatalf("failed to render config %q for host %q: %v", ctx.Group.Config, ctx.Host.Name, err)
 	}
-
-	return buf.String()
 }
 
 func (ctx *renderContext) StaticPods() (ba []byte, err error) {