Don't fail on missing sshkeys (openshift#176)

Not all the scenarios supported by CAPO require the manager to pull the
kubeconfig configs from the nodes. Rather than failing due to missing
ssh keys, we should just log the inability to pull the config file and
continue with the execution.

This is an interim solution until openshift#174 is resolved.

Related to openshift#175

Author: flaper87

pkg/cloud/openstack/machine/actuator.go

@@ -68,14 +68,6 @@ type OpenstackClient struct {
 }
 
 func NewActuator(params openstack.ActuatorParams) (*OpenstackClient, error) {
-	if _, err := os.Stat(SshPublicKeyPath); err != nil {
-		return nil, fmt.Errorf("public key for the ssh key pair not found")
-	}
-
-	if _, err := os.Stat(SshPrivateKeyPath); err != nil {
-		return nil, fmt.Errorf("private key for the ssh key pair not found")
-	}
-
 	return &OpenstackClient{
 		params:           params,
 		client:           params.Client,
@@ -302,6 +294,16 @@ func getIPFromInstance(instance *clients.Instance) (string, error) {
 }
 
 func (oc *OpenstackClient) GetKubeConfig(cluster *clusterv1.Cluster, master *clusterv1.Machine) (string, error) {
+	if _, err := os.Stat(SshPublicKeyPath); err != nil {
+		klog.Infof("Can't get the KubeConfig file as the public ssh key could not be found: %v\n", SshPublicKeyPath)
+		return "", nil
+	}
+
+	if _, err := os.Stat(SshPrivateKeyPath); err != nil {
+		klog.Infof("Can't get the KubeConfig file as the private ssh key could not be found: %v\n", SshPrivateKeyPath)
+		return "", nil
+	}
+
 	ip, err := oc.GetIP(cluster, master)
 	if err != nil {
 		return "", err