preliminary multi-net support

cmd/dkl-dir2config/main.go

@@ -52,11 +52,6 @@ func main() {
 
 	openIncludes()
 
-	if false {
-		assemble("hosts/m1")
-		log.Fatal("--- debug: end ---")
-	}
-
 	loadSrc()
 
 	dst = &localconfig.Config{

cmd/dkl-dir2config/render-cluster.go

@@ -9,10 +9,10 @@ import (
 	"novit.tech/direktil/local-server/pkg/clustersconfig"
 )
 
-func clusterFuncs(clusterSpec *clustersconfig.Cluster) map[string]interface{} {
+func clusterFuncs(clusterSpec *clustersconfig.Cluster) map[string]any {
 	cluster := clusterSpec.Name
 
-	return map[string]interface{}{
+	return map[string]any{
 		"password": func(name, hash string) (s string) {
 			return fmt.Sprintf("{{ password %q %q %q | quote }}", cluster, name, hash)
 		},
@@ -36,7 +36,7 @@ func clusterFuncs(clusterSpec *clustersconfig.Cluster) map[string]interface{} {
 			return fmt.Sprintf("{{ ca_dir %q %q }}", cluster, name), nil
 		},
 
-		"hosts_by_cluster": func(cluster string) (hosts []interface{}) {
+		"hosts_by_cluster": func(cluster string) (hosts []any) {
 			for _, host := range src.Hosts {
 				if host.Cluster == cluster {
 					hosts = append(hosts, asMap(host))
@@ -50,7 +50,7 @@ func clusterFuncs(clusterSpec *clustersconfig.Cluster) map[string]interface{} {
 			return
 		},
 
-		"hosts_by_group": func(group string) (hosts []interface{}) {
+		"hosts_by_group": func(group string) (hosts []any) {
 			for _, host := range src.Hosts {
 				if host.Cluster == cluster && host.Group == group {
 					hosts = append(hosts, asMap(host))
@@ -63,6 +63,26 @@ func clusterFuncs(clusterSpec *clustersconfig.Cluster) map[string]interface{} {
 
 			return
 		},
+
+		"host_ip_from": func(hostName, net string) string {
+			host := src.Host(hostName)
+			if host == nil {
+				log.Printf("WARNING: no host named %q", hostName)
+				return "<no value>"
+			}
+
+			ipFrom := host.IPFrom
+			if ipFrom == nil {
+				ipFrom = map[string]string{}
+			}
+
+			ip, ok := ipFrom[net]
+			if !ok {
+				ip = host.IP
+			}
+
+			return ip
+		},
 	}
 }
 

cmd/dkl-dir2config/render-context.go

@@ -5,10 +5,12 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"math/rand"
 	"path"
 	"reflect"
 	"strings"
 
+	"github.com/cespare/xxhash"
 	yaml "gopkg.in/yaml.v2"
 
 	"novit.tech/direktil/pkg/config"
@@ -201,7 +203,7 @@ func (ctx *renderContext) renderConfigTo(buf io.Writer, configTemplate *clusters
 	}
 }
 
-func (ctx *renderContext) templateFuncs(ctxMap map[string]interface{}) map[string]interface{} {
+func (ctx *renderContext) templateFuncs(ctxMap map[string]any) map[string]interface{} {
 	cluster := ctx.Cluster.Name
 
 	getKeyCert := func(name, funcName string) (s string, err error) {
@@ -242,7 +244,7 @@ func (ctx *renderContext) templateFuncs(ctxMap map[string]interface{}) map[strin
 	}
 
 	funcs := clusterFuncs(ctx.Cluster)
-	for k, v := range map[string]interface{}{
+	for k, v := range map[string]any{
 		"default": func(value, defaultValue any) any {
 			switch v := value.(type) {
 			case string:
@@ -281,11 +283,11 @@ func (ctx *renderContext) templateFuncs(ctxMap map[string]interface{}) map[strin
 			return "{{ host_download_token }}"
 		},
 
-		"hosts_of_group": func() (hosts []interface{}) {
-			hosts = make([]interface{}, 0)
+		"hosts_of_group": func() (hosts []any) {
+			hosts = make([]any, 0)
 
 			for _, host := range ctx.clusterConfig.Hosts {
-				if host.Group != ctx.Host.Group {
+				if host.Cluster == ctx.Cluster.Name && host.Group != ctx.Host.Group {
 					continue
 				}
 
@@ -297,12 +299,31 @@ func (ctx *renderContext) templateFuncs(ctxMap map[string]interface{}) map[strin
 
 		"hosts_of_group_count": func() (count int) {
 			for _, host := range ctx.clusterConfig.Hosts {
-				if host.Group == ctx.Host.Group {
+				if host.Cluster == ctx.Cluster.Name && host.Group == ctx.Host.Group {
 					count++
 				}
 			}
 			return
 		},
+
+		"shuffled_hosts_by_group": func(group string) (hosts []any) {
+			for _, host := range src.Hosts {
+				if host.Cluster == ctx.Cluster.Name && host.Group == group {
+					hosts = append(hosts, asMap(host))
+				}
+			}
+
+			if len(hosts) == 0 {
+				log.Printf("WARNING: no hosts in group %q", group)
+				return
+			}
+
+			seed := xxhash.Sum64String(ctx.Host.Name)
+			rng := rand.New(rand.NewSource(int64(seed)))
+			rng.Shuffle(len(hosts), func(i, j int) { hosts[i], hosts[j] = hosts[j], hosts[i] })
+
+			return
+		},
 	} {
 		funcs[k] = v
 	}

cmd/dkl-local-server/state.go

@@ -148,9 +148,9 @@ func updateState() {
 		hosts = append(hosts, h)
 	}
 
-	hostTemplates := make([]string, 0, len(cfg.HostTemplates))
-	for _, ht := range cfg.HostTemplates {
-		hostTemplates = append(hostTemplates, ht.Name)
+	hostTemplates := make([]string, len(cfg.HostTemplates))
+	for i, ht := range cfg.HostTemplates {
+		hostTemplates[i] = ht.Name
 	}
 
 	// done

pkg/clustersconfig/clustersconfig.go

@@ -202,6 +202,9 @@ type Host struct {
 	Cluster string
 	Group   string
 
+	Net    string
+	IPFrom map[string]string `json:",omitempty" yaml:"ip_from"`
+
 	IPXE            string `json:",omitempty"`
 	Kernel          string
 	Initrd          string