cluster-autoscaler: support Brightbox image pattern

cluster-autoscaler/cloudprovider/brightbox/Makefile

@@ -1,5 +1,5 @@
 export BUILD_TAGS=brightbox
-export REGISTRY=brightbox
+export REGISTRY?=brightbox
 export GOARCH?=$(shell go env GOARCH)
 ifndef TAG
 	override TAG=dev

cluster-autoscaler/cloudprovider/brightbox/README.md

@@ -161,8 +161,8 @@ $ make build
 
 This builds an autoscaler containing only the Brightbox Cloud provider,
 tagged as `brightbox/cluster-autoscaler-brightbox:dev`. To build any
-other version add a TAG variable
+other version add a TAG variable and/or a REGISTRY variable
 
 ```
-make build TAG=1.1x
+make build TAG=1.1x REGISTRY=cr.brightbox.com/acc-xxxxx/<registry-name>
 ```

cluster-autoscaler/cloudprovider/brightbox/brightbox_node_group.go

@@ -359,24 +359,32 @@ func makeNodeGroupFromAPIDetails(
 	if mapData["server_group"] == "" {
 		return nil, cloudprovider.ErrIllegalConfiguration
 	}
+	ng := brightboxNodeGroup{
+		id:      mapData["server_group"],
+		minSize: minSize,
+		maxSize: maxSize,
+		Cloud:   cloudclient,
+	}
+	imageID := mapData["image"]
+	if !(len(imageID) == 9 && strings.HasPrefix(imageID, "img-")) {
+		image, err := ng.GetImageByName(imageID)
+		if err != nil || image == nil {
+			return nil, cloudprovider.ErrIllegalConfiguration
+		}
+		imageID = image.Id
+	}
 	userData := mapData["user_data"]
 	options := &brightbox.ServerOptions{
-		Image:        mapData["image"],
+		Image:        imageID,
 		Name:         &name,
 		ServerType:   mapData["type"],
 		Zone:         mapData["zone"],
 		UserData:     &userData,
 		ServerGroups: mergeServerGroups(mapData),
 	}
-	result := brightboxNodeGroup{
-		id:            mapData["server_group"],
-		minSize:       minSize,
-		maxSize:       maxSize,
-		serverOptions: options,
-		Cloud:         cloudclient,
-	}
-	klog.V(4).Info(result.Debug())
-	return &result, nil
+	ng.serverOptions = options
+	klog.V(4).Info(ng.Debug())
+	return &ng, nil
 }
 
 func mergeServerGroups(data map[string]string) []string {

cluster-autoscaler/cloudprovider/brightbox/k8ssdk/brightbox_interface.go

@@ -18,6 +18,8 @@ import (
 	"context"
 	"fmt"
 	"net/http"
+	"regexp"
+	"sort"
 	"strings"
 
 	brightbox "k8s.io/autoscaler/cluster-autoscaler/cloudprovider/brightbox/gobrightbox"
@@ -166,6 +168,36 @@ func (c *Cloud) GetServerType(identifier string) (*brightbox.ServerType, error)
 	return client.ServerType(identifier)
 }
 
+// GetImageByName obtains the most recent available image that matches the supplied pattern
+func (c *Cloud) GetImageByName(name string) (*brightbox.Image, error) {
+	klog.V(4).Infof("GetImageByName %q", name)
+	client, err := c.CloudClient()
+	if err != nil {
+		return nil, err
+	}
+	klog.V(6).Info("GetImageByName compiling regexp")
+	nameRe, err := regexp.Compile(name)
+	if err != nil {
+		return nil, err
+	}
+	klog.V(6).Info("GetImageByName retrieving images")
+	images, err := client.Images()
+	if err != nil {
+		return nil, err
+	}
+	klog.V(6).Info("GetImageByName filtering images")
+	filteredImages := filter(
+		images,
+		func(i brightbox.Image) bool {
+			return i.Official &&
+				i.Status == status.Available &&
+				nameRe.MatchString(i.Name)
+		},
+	)
+	klog.V(6).Infof("GetImageByName images selected (%+v)", filteredImages)
+	return mostRecent(filteredImages), nil
+}
+
 // GetConfigMaps obtains the list of Config Maps on the account
 func (c *Cloud) GetConfigMaps() ([]brightbox.ConfigMap, error) {
 	klog.V(4).Info("GetConfigMaps")
@@ -555,3 +587,27 @@ func ErrorIfAcmeNotComplete(acme *brightbox.LoadBalancerAcme) error {
 	}
 	return nil
 }
+
+// Returns the most recent item out of a slice of items with Dates
+// or nil if there are no items
+func mostRecent(items []brightbox.Image) *brightbox.Image {
+	if len(items) == 0 {
+		return nil
+	}
+	sortedItems := items
+	sort.Slice(items, func(i, j int) bool {
+		return items[i].CreatedAt.Unix() > items[j].CreatedAt.Unix()
+	})
+	return &sortedItems[0]
+}
+
+// filter returns a new slice with all elements from the
+// input elements for which the provided predicate function returns true.
+func filter[T any](input []T, pred func(T) bool) (output []T) {
+	for _, v := range input {
+		if pred(v) {
+			output = append(output, v)
+		}
+	}
+	return output
+}

cluster-autoscaler/cloudprovider/brightbox/k8ssdk/cloud_access.go

@@ -92,6 +92,9 @@ type CloudAccess interface {
 	// DestroyCloudIP issues a request to destroy the cloud ip
 	DestroyCloudIP(identifier string) error
 
+	// ConfigMaps retrieves a list of all config maps
+	Images() ([]brightbox.Image, error)
+
 	// ConfigMaps retrieves a list of all config maps
 	ConfigMaps() ([]brightbox.ConfigMap, error)