Fix swallowed errors in upup subdirectory.

upup/pkg/fi/cloudup/awstasks/sshkey.go

@@ -108,6 +108,9 @@ func parseSSHPublicKey(publicKey string) (ssh.PublicKey, error) {
 	}
 
 	sshPublicKeyBytes, err := base64.StdEncoding.DecodeString(tokens[1])
+	if err != nil {
+		return nil, fmt.Errorf("error decoding SSH public key: %q err: %s", publicKey, err)
+	}
 	if len(tokens) < 2 {
 		return nil, fmt.Errorf("error decoding SSH public key: %q", publicKey)
 	}

upup/pkg/fi/cloudup/vspheretasks/attachiso.go

@@ -92,11 +92,18 @@ func (_ *AttachISO) CheckChanges(a, e, changes *AttachISO) error {
 // RenderVSphere executes the actual task logic, for vSphere cloud.
 func (_ *AttachISO) RenderVSphere(t *vsphere.VSphereAPITarget, a, e, changes *AttachISO) error {
 	startupScript, err := changes.BootstrapScript.ResourceNodeUp(changes.IG)
+	if err != nil {
+		return err
+	}
 	startupStr, err := startupScript.AsString()
 	if err != nil {
 		return fmt.Errorf("error rendering startup script: %v", err)
 	}
 	dir, err := ioutil.TempDir("", *changes.VM.Name)
+	if err != nil {
+		return err
+	}
+
 	defer os.RemoveAll(dir)
 
 	// Need this in cloud config file for vSphere CloudProvider

upup/pkg/fi/k8sapi/k8s_keystore.go

@@ -126,6 +126,9 @@ func (c *KubernetesKeystore) StoreKeypair(id string, cert *fi.Certificate, priva
 	}
 
 	secret, err := keypair.Encode()
+	if err != nil {
+		return fmt.Errorf("error encoding keypair: %+v  err: %s", keypair, err)
+	}
 	createdSecret, err := c.client.CoreV1().Secrets(c.namespace).Create(secret)
 	if err != nil {
 		return fmt.Errorf("error creating secret %s/%s: %v", secret.Namespace, secret.Name, err)