[WIP] first implementation stubs

internal/hetzner.go

@@ -0,0 +1,41 @@
+package internal
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/hetznercloud/hcloud-go/hcloud"
+	log "github.com/sirupsen/logrus"
+)
+
+func GetAllNodes(cfg *Config) ([]*hcloud.Server, error) {
+	client := hcloud.NewClient(hcloud.WithToken(cfg.HcloudToken))
+	servers, _, err := client.Server.List(context.TODO(), hcloud.ServerListOpts{
+		ListOpts: hcloud.ListOpts{
+			LabelSelector: cfg.LabelSelector,
+		}})
+	if err != nil {
+		return nil, errors.New(fmt.Sprintf("Error listing Hetzner Nodes: %s", err.Error()))
+	}
+
+	if servers == nil {
+		return nil, errors.New(fmt.Sprintf("No Nodes found with label selector: %s", cfg.LabelSelector))
+	}
+	return servers, nil
+
+}
+
+func GetAllIps(servers []*hcloud.Server) ([]string, error) {
+	ips := make([]string, len(servers))
+	for i, instance := range servers {
+		if len(instance.PrivateNet) == 0 || instance.PrivateNet[0].IP == nil {
+			return []string{""}, errors.New(fmt.Sprintf("Instance %s has no attached IP", instance.Name))
+		}
+		log.WithFields(log.Fields{
+			"Caller": "GetAllIps",
+		}).Info(fmt.Sprintf("Found IP: %s", instance.PrivateNet[0].IP.String()))
+		ips[i] = instance.PrivateNet[0].IP.String()
+	}
+	return ips, nil
+}