jpictl: introduce `jpictl dns sync` to update public DNS records

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

cmd/jpictl/dns.go

@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"os"
+	"time"
 
 	"github.com/spf13/cobra"
 
@@ -10,6 +11,12 @@ import (
 	"git.jpi.io/amery/jpictl/pkg/dns"
 )
 
+const (
+	// DNSSyncTimeout specifies how long are we willing to wait for a DNS
+	// synchronization
+	DNSSyncTimeout = 10 * time.Second
+)
+
 func newDNSManager(m *cluster.Cluster, provider dns.Provider) (*dns.Manager, error) {
 	domain := m.Domain
 	if m.Name != "" {
@@ -90,8 +97,36 @@ var dnsWriteCmd = &cobra.Command{
 	},
 }
 
+var dnsSyncCmd = &cobra.Command{
+	Use:    "sync",
+	Short:  "dns sync updates public DNS records",
+	PreRun: setVerbosity,
+	RunE: func(_ *cobra.Command, _ []string) error {
+		cred, err := dns.DefaultDNSProvider()
+		if err != nil {
+			return err
+		}
+
+		m, err := cfg.LoadZones(true)
+		if err != nil {
+			return err
+		}
+
+		mgr, err := newDNSManager(m, cred)
+		if err != nil {
+			return err
+		}
+
+		ctx, cancel := context.WithTimeout(context.Background(), DNSSyncTimeout)
+		defer cancel()
+
+		return mgr.Sync(ctx)
+	},
+}
+
 func init() {
 	rootCmd.AddCommand(dnsCmd)
 
 	dnsCmd.AddCommand(dnsWriteCmd)
+	dnsCmd.AddCommand(dnsSyncCmd)
 }