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

cmd/dkl-dir2config/render-host.go

@@ -0,0 +1,77 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"log"
+
+	yaml "gopkg.in/yaml.v2"
+	"novit.tech/direktil/local-server/pkg/clustersconfig"
+)
+
+func (ctx *renderContext) renderBootstrapPods() (pods []namePod) {
+	if ctx.Cluster.BootstrapPods == "" {
+		return
+	}
+
+	bootstrapPods, ok := src.BootstrapPods[ctx.Cluster.BootstrapPods]
+	if !ok {
+		log.Fatalf("no bootstrap pods template named %q", ctx.Cluster.BootstrapPods)
+	}
+
+	// render bootstrap pods
+	parts := bytes.Split(ctx.renderHostTemplates("bootstrap-pods", bootstrapPods), []byte("\n---\n"))
+	for _, part := range parts {
+		buf := bytes.NewBuffer(part)
+		dec := yaml.NewDecoder(buf)
+
+		for n := 0; ; n++ {
+			str := buf.String()
+
+			podMap := map[string]interface{}{}
+			err := dec.Decode(podMap)
+
+			if err == io.EOF {
+				break
+			} else if err != nil {
+				log.Fatalf("bootstrap pod %d: failed to parse: %v\n%s", n, err, str)
+			}
+
+			if len(podMap) == 0 {
+				continue
+			}
+
+			if podMap["metadata"] == nil {
+				log.Fatalf("bootstrap pod %d: no metadata\n%s", n, buf.String())
+			}
+
+			md := podMap["metadata"].(map[interface{}]interface{})
+
+			namespace := md["namespace"].(string)
+			name := md["name"].(string)
+
+			pods = append(pods, namePod{namespace, name, podMap})
+		}
+	}
+
+	return
+}
+
+func (ctx *renderContext) renderHostTemplates(setName string,
+	templates []*clustersconfig.Template) []byte {
+
+	log.Print("rendering host templates in ", setName)
+
+	buf := &bytes.Buffer{}
+
+	for _, t := range templates {
+		log.Print("- template: ", setName, ": ", t.Name)
+		fmt.Fprintf(buf, "---\n# %s: %s\n", setName, t.Name)
+
+		ctx.renderConfigTo(buf, t)
+		fmt.Fprintln(buf)
+	}
+
+	return buf.Bytes()
+}