Properly uninstall traefik configuration

When removing the configuration file traefik is not reinstalled. This
can be achieved by change the file to an empty one and deleting it once
traefik has been reinstalled.

shared/kubernetes/k3s.go

@@ -33,6 +33,10 @@ func InstallK3sTraefikConfig(tcpPorts []types.PortMap, udpPorts []types.PortMap)
 	}
 
 	// Wait for traefik to be back
+	waitForTraefik()
+}
+
+func waitForTraefik() {
 	log.Info().Msg(L("Waiting for Traefik to be reloaded"))
 	for i := 0; i < 60; i++ {
 		out, err := utils.RunCmdOutput(zerolog.TraceLevel, "kubectl", "get", "job", "-n", "kube-system",
@@ -50,6 +54,21 @@ func InstallK3sTraefikConfig(tcpPorts []types.PortMap, udpPorts []types.PortMap)
 
 // UninstallK3sTraefikConfig uninstall K3s Traefik configuration.
 func UninstallK3sTraefikConfig(dryRun bool) {
+	// Write a blank file first to get traefik to be reinstalled
+	if !dryRun {
+		log.Info().Msg(L("Reinstalling Traefik without additionnal configuration"))
+		err := os.WriteFile(k3sTraefikConfigPath, []byte{}, 0600)
+		if err != nil {
+			log.Error().Err(err).Msg(L("failed to write empty traefik configuration"))
+		} else {
+			// Wait for traefik to be back
+			waitForTraefik()
+		}
+	} else {
+		log.Info().Msg(L("Would reinstall Traefik without additionnal configuration"))
+	}
+
+	// Now that it's reinstalled, remove the file
 	utils.UninstallFile(k3sTraefikConfigPath, dryRun)
 }