add openstack worker support

pkg/config/cluster.go

@@ -205,7 +205,7 @@ func (p ProviderName) ProviderCredentials() (map[string]string, error) {
 
 		return nil, errors.New("error parsing aws credentials")
 	case ProviderNameOpenStack:
-		return parseCredentialVariables([]string{"OS_AUTH_URL", "OS_USER_NAME", "OS_PASSWORD", "OS_DOMAIN_NAME", "OS_TENANT_NAME"})
+		return parseCredentialVariables([]string{"OS_AUTH_URL", "OS_USER_NAME", "OS_PASSWORD", "OS_DOMAIN_NAME", "OS_TENANT_NAME", "OS_REGION_NAME"})
 	case ProviderNameHetzner:
 		return parseCredentialVariables([]string{"HZ_TOKEN"})
 	case ProviderNameDigitalOcean:

pkg/terraform/config.go

@@ -65,6 +65,16 @@ type doWorkerConfig struct {
 	Region      string `json:"region"`
 }
 
+type openStackWorkerConfig struct {
+	Image            string   `json:"image"`
+	Flavor           string   `json:"flavor"`
+	SecurityGroups   []string `json:"securityGroups"`
+	FloatingIPPool   string   `json:"floatingIPPool"`
+	AvailabilityZone string   `json:"availabilityZone"`
+	Network          string   `json:"network"`
+	Subnet           string   `json:"subnet"`
+}
+
 // Config represents configuration in the terraform output format
 type Config struct {
 	KubeOneAPI struct {
@@ -264,8 +274,35 @@ func (c *Config) updateHetznerWorkerset(_ *config.WorkerConfig, _ json.RawMessag
 	return errors.New("cloudprovider Hetzner is not implemented yet")
 }
 
-func (c *Config) updateOpenStackWorkerset(_ *config.WorkerConfig, _ json.RawMessage) error {
-	return errors.New("cloudprovider OpenStack is not implemented yet")
+func (c *Config) updateOpenStackWorkerset(workerset *config.WorkerConfig, cfg json.RawMessage) error {
+	var openstackConfig openStackWorkerConfig
+	if err := json.Unmarshal(cfg, &openstackConfig); err != nil {
+		return err
+	}
+
+	if err := setWorkersetFlag(workerset, "floatingIPPool", openstackConfig.FloatingIPPool); err != nil {
+		return err
+	}
+	if err := setWorkersetFlag(workerset, "image", openstackConfig.Image); err != nil {
+		return err
+	}
+	if err := setWorkersetFlag(workerset, "flavor", openstackConfig.Flavor); err != nil {
+		return err
+	}
+	if err := setWorkersetFlag(workerset, "securityGroups", openstackConfig.SecurityGroups); err != nil {
+		return err
+	}
+	if err := setWorkersetFlag(workerset, "availabilityZone", openstackConfig.AvailabilityZone); err != nil {
+		return err
+	}
+	if err := setWorkersetFlag(workerset, "network", openstackConfig.Network); err != nil {
+		return err
+	}
+	if err := setWorkersetFlag(workerset, "subnet", openstackConfig.Subnet); err != nil {
+		return err
+	}
+
+	return nil
 }
 
 func (c *Config) updateVSphereWorkerset(_ *config.WorkerConfig, _ json.RawMessage) error {

terraform/openstack/main.tf

@@ -76,7 +76,7 @@ resource "openstack_compute_instance_v2" "control_plane" {
   count = "${var.control_plane_count}"
 
   name            = "${var.cluster_name}-cluster-${count.index}"
-  image_name      = "${var.control_plane_image}"
+  image_name      = "${var.image}"
   flavor_name     = "${var.control_plane_flavor}"
   key_pair        = "${openstack_compute_keypair_v2.deployer.name}"
   security_groups = ["${openstack_networking_secgroup_v2.securitygroup.name}"]

terraform/openstack/output.tf

@@ -18,3 +18,19 @@ output "kubeone_hosts" {
     }
   }
 }
+
+output "kubeone_workers" {
+  value = {
+    nodes1 = {
+      image            = "${var.image}"
+      instanceProfile  = "${var.worker_flavor}"
+      securityGroupIDs = ["${openstack_networking_secgroup_v2.securitygroup.id}"]
+      floatingIPPool   = "${var.external_network_name}"
+      network          = "${openstack_networking_network_v2.network.name}"
+      subnet           = "${openstack_networking_subnet_v2.subnet.name}"
+
+      operatingSystem = "ubuntu"
+      replicas        = 1
+    }
+  }
+}

terraform/openstack/variables.tf

@@ -28,14 +28,19 @@ variable "control_plane_count" {
 
 variable "control_plane_flavor" {
   default     = "m1.small"
-  description = "OpenStack instance flavor"
+  description = "OpenStack instance flavor for the control plane nodes"
 }
 
-variable "control_plane_image" {
+variable "image" {
   default     = "Ubuntu 18.04 LTS"
   description = "OpenStack image for the control plane nodes"
 }
 
+variable "worker_flavor" {
+  default     = "m1.small"
+  description = "OpenStack instance flavor for the worker nodes"
+}
+
 variable "subnet_cidr" {
   default     = "192.168.1.0/24"
   description = "OpenStack subnet cidr"