fix podman delete network

pkg/cluster/internal/providers/podman/network.go

@@ -90,8 +90,8 @@ func createNetwork(name, subnet string) error {
 // delete network if exists, otherwise do nothing
 func deleteNetwork(name string) error {
 	networkName := fmt.Sprintf("%s-%s", fixedNetworkPrefix, name)
-	if err := exec.Command("podman", "network", "inspect", networkName); err != nil {
-		return nil
+	if err := exec.Command("podman", "network", "inspect", networkName).Run(); err != nil {
+		return err
 	}
 	return exec.Command("podman", "network", "rm", networkName).Run()
 }

pkg/cluster/internal/providers/podman/provider.go

@@ -137,34 +137,33 @@ func (p *Provider) DeleteCluster(name string) error {
 		return errors.Wrap(err, "error listing nodes")
 	}
 
-	if len(n) == 0 {
-		return nil
-	}
-	const command = "podman"
-	args := make([]string, 0, len(n)+3) // allocate once
-	args = append(args,
-		"rm",
-		"-f", // force the container to be delete now
-		"-v", // delete volumes
-	)
-	for _, node := range n {
-		args = append(args, node.String())
-	}
-	if err := exec.Command(command, args...).Run(); err != nil {
-		return errors.Wrap(err, "failed to delete nodes")
-	}
-	var nodeVolumes []string
-	for _, node := range n {
-		volumes, err := getVolumes(node.String())
-		if err != nil {
+	// delete nodes
+	if len(n) != 0 {
+		const command = "podman"
+		args := make([]string, 0, len(n)+3) // allocate once
+		args = append(args,
+			"rm",
+			"-f", // force the container to be delete now
+			"-v", // delete volumes
+		)
+		for _, node := range n {
+			args = append(args, node.String())
+		}
+		if err := exec.Command(command, args...).Run(); err != nil {
+			return errors.Wrap(err, "failed to delete nodes")
+		}
+		var nodeVolumes []string
+		for _, node := range n {
+			volumes, err := getVolumes(node.String())
+			if err != nil {
+				return err
+			}
+			nodeVolumes = append(nodeVolumes, volumes...)
+		}
+		if err := deleteVolumes(nodeVolumes); err != nil {
 			return err
 		}
-		nodeVolumes = append(nodeVolumes, volumes...)
 	}
-	if err := deleteVolumes(nodeVolumes); err != nil {
-		return err
-	}
-
 	return deleteNetwork(name)
 }