cluster: introduce SyncRegions() to write regions file

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/cluster/sync.go

@@ -6,6 +6,7 @@ func (m *Cluster) SyncAll() error {
 		m.SyncMkdirAll,
 		m.SyncAllWireguard,
 		m.SyncAllCeph,
+		m.SyncAllRegions,
 		m.WriteHosts,
 	} {
 		if err := fn(); err != nil {
@@ -58,3 +59,24 @@ func (m *Cluster) SyncAllCeph() error {
 
 	return m.WriteCephConfig(cfg)
 }
+
+// SyncAllRegions rewrites all region data
+func (m *Cluster) SyncAllRegions() error {
+	var err error
+
+	m.ForEachZone(func(z *Zone) bool {
+		err := z.SyncRegions()
+		return err != nil
+	})
+
+	if err != nil {
+		return err
+	}
+
+	m.ForEachRegion(func(r *Region) bool {
+		err = r.SyncRegions()
+		return err != nil
+	})
+
+	return err
+}