fix: request previous IP address in discovery

This ensures that even in the event of a DHCP downtime that exceeds the lease time, the current IP can be maintained. Signed-off-by: TomyLobo <[email protected]>
siderolabs · Jan 8, 2025 · 5832497 · 5832497
1 parent 32c67c2
commit 5832497
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/internal/app/machined/pkg/controllers/network/operator/dhcp4.go b/internal/app/machined/pkg/controllers/network/operator/dhcp4.go
@@ -539,6 +539,14 @@ func (d *DHCP4) requestRenew(ctx context.Context, hostname network.HostnameStatu
 	case d.lease != nil && d.lease.Offer != nil:
 		d.logger.Debug("DHCP REQUEST FROM OFFER", zap.String("link", d.linkName))
 		d.lease, err = client.RequestFromOffer(ctx, d.lease.Offer, mods...)
+	case len(d.AddressSpecs()) >= 1:
+		d.logger.Debug("DHCP REQUEST WITH PREVIOUS IP", zap.String("link", d.linkName))
+
+		var firstIPAddress net.IP = d.AddressSpecs()[0].Address.Addr().AsSlice()
+
+		d.lease, err = client.Request(ctx, dhcpv4.PrependModifiers(mods,
+			dhcpv4.WithOption(dhcpv4.OptRequestedIPAddress(firstIPAddress)),
+		)...)
 	default:
 		d.logger.Debug("DHCP REQUEST", zap.String("link", d.linkName))
 		d.lease, err = client.Request(ctx, mods...)