change agent creation logic to use agentToken instead of systemToken

cmd/woodpecker-autoscaler.go

@@ -52,7 +52,13 @@ func main() {
 			"Caller": "Main",
 		}).Infof("Currently owning %d Agents", len(ownedNodes))
 		if pendingTasks > len(ownedNodes) {
-			server, err := hetzner.CreateNewAgent(cfg)
+			agent, err := woodpecker.CreateWoodpeckerAgent(cfg)
+			if err != nil {
+				log.WithFields(log.Fields{
+					"Caller": "Main",
+				}).Fatal(fmt.Sprintf("Error creating new agent: %s", err.Error()))
+			}
+			server, err := hetzner.CreateNewAgent(cfg, agent)
 			if err != nil {
 				log.WithFields(log.Fields{
 					"Caller": "Main",
@@ -100,14 +106,17 @@ func main() {
 						"Caller": "Main",
 					}).Info("No tasks running. Will remove agents")
 					for _, server := range ownedNodes {
-						hetzner.DecomNode(cfg, &server)
+						agentId, err := hetzner.DecomNode(cfg, &server)
-						agentId, err := woodpecker.GetAgentIdByName(cfg, server.Name)
 						if err != nil {
 							log.WithFields(log.Fields{
 								"Caller": "Main",
-							}).Warnf("Could not find agent %s in woodpecker. Assuming it was never added", server.Name)
+							}).Warnf("Error while deleting node %s: %s", server.Name, err.Error())
-						} else {
+						}
-							woodpecker.DecomAgent(cfg, agentId)
+						err = woodpecker.DecomAgent(cfg, agentId)
+						if err != nil {
+							log.WithFields(log.Fields{
+								"Caller": "Main",
+							}).Warnf("Could not delete node %s in woodpecker: %s", server.Name, err.Error())
 						}
 					}
 				}

internal/hetzner/hetzneragent.go

@@ -5,10 +5,12 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"strconv"
 	"strings"
 	"text/template"
 
 	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/config"
+	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/models"
 	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/utils"
 	"github.com/hetznercloud/hcloud-go/hcloud"
 
@@ -42,13 +44,14 @@ type UserDataConfig struct {
 	EnvConfig map[string]interface{}
 }
 
-func generateConfig(cfg *config.Config, name string) (string, error) {
+func generateConfig(cfg *config.Config, name string, agentToken string) (string, error) {
 	envConfig := map[string]interface{}{
 		"WOODPECKER_SERVER":        fmt.Sprintf("%s", cfg.WoodpeckerGrpc),
 		"WOODPECKER_GRPC_SECURE":   true,
-		"WOODPECKER_AGENT_SECRET":  fmt.Sprintf("%s", cfg.WoodpeckerAgentSecret),
+		"WOODPECKER_AGENT_SECRET":  fmt.Sprintf("%s", agentToken),
 		"WOODPECKER_FILTER_LABELS": fmt.Sprintf("%s", cfg.WoodpeckerLabelSelector),
 		"WOODPECKER_HOSTNAME":      fmt.Sprintf("%s", name),
+		"WOODPECKER_MAX_WORKFLOWS": 4,
 	}
 	config := UserDataConfig{
 		Image:     fmt.Sprintf("woodpeckerci/woodpecker-agent:%s", cfg.WoodpeckerAgentVersion),
@@ -66,10 +69,9 @@ func generateConfig(cfg *config.Config, name string) (string, error) {
 	return buf.String(), nil
 }
 
-func CreateNewAgent(cfg *config.Config) (*hcloud.Server, error) {
+func CreateNewAgent(cfg *config.Config, woodpeckerAgent *models.Agent) (*hcloud.Server, error) {
 	client := hcloud.NewClient(hcloud.WithToken(cfg.HcloudToken))
-	name := fmt.Sprintf("woodpecker-autoscaler-agent-%s", utils.RandStringBytes(5))
+	userdata, err := generateConfig(cfg, woodpeckerAgent.Name, woodpeckerAgent.Token)
-	userdata, err := generateConfig(cfg, name)
 	keys := []*hcloud.SSHKey{}
 	for _, keyName := range strings.Split(cfg.HcloudSSHKeys, ",") {
 		key, _, err := client.SSHKey.GetByName(context.Background(), keyName)
@@ -90,6 +92,7 @@ func CreateNewAgent(cfg *config.Config) (*hcloud.Server, error) {
 	labels := map[string]string{}
 	labels["Role"] = "WoodpeckerAgent"
 	labels["ControledBy"] = "WoodpeckerAutoscaler"
+	labels["ID"] = fmt.Sprintf("%d", woodpeckerAgent.ID)
 
 	networkConf := hcloud.ServerCreatePublicNet{
 		EnableIPv4: !cfg.HcloudIPv6Only,
@@ -97,7 +100,7 @@ func CreateNewAgent(cfg *config.Config) (*hcloud.Server, error) {
 	}
 
 	res, _, err := client.Server.Create(context.Background(), hcloud.ServerCreateOpts{
-		Name:             name,
+		Name:             woodpeckerAgent.Name,
 		ServerType:       pln,
 		Image:            img,
 		SSHKeys:          keys,
@@ -138,16 +141,28 @@ func ListAgents(cfg *config.Config) ([]hcloud.Server, error) {
 	return myServers, nil
 }
 
-func DecomNode(cfg *config.Config, server *hcloud.Server) error {
+func DecomNode(cfg *config.Config, server *hcloud.Server) (int64, error) {
 	client := hcloud.NewClient(hcloud.WithToken(cfg.HcloudToken))
+	var woodpeckerAgentID int64
+	val, exists := server.Labels["ID"]
+	if exists {
+		log.WithFields(log.Fields{
+			"Caller": "DecomNode",
+		}).Debugf("Found woodpecker agent id: %s", val)
+		woodpeckerAgentID, _ = strconv.ParseInt(val, 10, 64)
+	} else {
+		log.WithFields(log.Fields{
+			"Caller": "DecomNode",
+		}).Warnf("Did not find woodpecker agent id for node %s", server.Name)
+	}
 	log.WithFields(log.Fields{
 		"Caller": "DecomNode",
 	}).Debugf("Deleting %s node", server.Name)
 	_, _, err := client.Server.DeleteWithResult(context.Background(), server)
 	if err != nil {
-		return errors.New(fmt.Sprintf("Could not delete Agent: %s", err.Error()))
+		return woodpeckerAgentID, errors.New(fmt.Sprintf("Could not delete Agent: %s", err.Error()))
 	}
-	return nil
+	return woodpeckerAgentID, nil
 }
 
 func RefreshNodeInfo(cfg *config.Config, serverID int) (*hcloud.Server, error) {

internal/hetzner/hetzneragent_test.go

@@ -40,12 +40,13 @@ write_files:
           - WOODPECKER_FILTER_LABELS=uploadfilter24.eu/instance-role=WoodpeckerTest
           - WOODPECKER_GRPC_SECURE=true
           - WOODPECKER_HOSTNAME=test-instance
+          - WOODPECKER_MAX_WORKFLOWS=4
           - WOODPECKER_SERVER=grpc-test.woodpecker.test.tld:443
   path: /root/docker-compose.yml
 runcmd:
 - [ sh, -xc, "cd /root; docker run --rm --privileged multiarch/qemu-user-static --reset -p yes; docker compose up -d" ]
 `
-	got, err := generateConfig(&cfg, "test-instance")
+	got, err := generateConfig(&cfg, "test-instance", "Geheim1!")
 	if err != nil {
 		t.Errorf("Error in generating Config: %v", err)
 	}

internal/woodpecker/agent.go

@@ -1,6 +1,7 @@
 package woodpecker
 
 import (
+	"bytes"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -8,11 +9,12 @@ import (
 
 	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/config"
 	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/models"
+	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/utils"
 
 	log "github.com/sirupsen/logrus"
 )
 
-func DecomAgent(cfg *config.Config, agentId int) error {
+func DecomAgent(cfg *config.Config, agentId int64) error {
 	apiRoute := fmt.Sprintf("%s/api/agents/%d", cfg.WoodpeckerInstance, agentId)
 	req, err := http.NewRequest("DELETE", apiRoute, nil)
 	if err != nil {
@@ -35,7 +37,7 @@ func DecomAgent(cfg *config.Config, agentId int) error {
 
 func GetAgentIdByName(cfg *config.Config, name string) (int, error) {
 	apiRoute := fmt.Sprintf("%s/api/agents?page=1&perPage=100", cfg.WoodpeckerInstance)
-	req, err := http.NewRequest("GET", apiRoute, nil)
+	req, err := http.NewRequest(http.MethodGet, apiRoute, nil)
 	if err != nil {
 		return 0, errors.New(fmt.Sprintf("Could not create agent query request: %s", err.Error()))
 	}
@@ -67,3 +69,64 @@ func GetAgentIdByName(cfg *config.Config, name string) (int, error) {
 	}
 	return 0, errors.New(fmt.Sprintf("Agent with name %s is not in server", name))
 }
+
+func ListAgents(cfg *config.Config) (*models.AgentList, error) {
+	agentList := new(models.AgentList)
+	apiRoute := fmt.Sprintf("%s/api/agents?page=1&perPage=100", cfg.WoodpeckerInstance)
+	req, err := http.NewRequest(http.MethodGet, apiRoute, nil)
+	if err != nil {
+		return agentList, errors.New(fmt.Sprintf("Could not create agent query request: %s", err.Error()))
+	}
+	req.Header.Set("Accept", "application/json")
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", cfg.WoodpeckerApiToken))
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return agentList, errors.New(fmt.Sprintf("Could not query agent list: %s", err.Error()))
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return agentList, errors.New(fmt.Sprintf("Invalid status code from API: %d", resp.StatusCode))
+	}
+	err = json.NewDecoder(resp.Body).Decode(agentList)
+	if err != nil {
+		return agentList, errors.New(fmt.Sprintf("Could not unmarshal api response: %s", err.Error()))
+	}
+	return agentList, nil
+}
+
+func CreateWoodpeckerAgent(cfg *config.Config) (*models.Agent, error) {
+	name := fmt.Sprintf("woodpecker-autoscaler-agent-%s", utils.RandStringBytes(5))
+	agentRequest := models.Agent{
+		Name:       name,
+		NoSchedule: false,
+	}
+	jsonBody, _ := json.Marshal(agentRequest)
+	bodyReader := bytes.NewReader(jsonBody)
+
+	apiRoute := fmt.Sprintf("%s/api/agents", cfg.WoodpeckerInstance)
+	req, err := http.NewRequest(http.MethodPost, apiRoute, bodyReader)
+	if err != nil {
+		return nil, errors.New(fmt.Sprintf("Could not create agent request: %s", err.Error()))
+	}
+	req.Header.Set("Accept", "application/json")
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", cfg.WoodpeckerApiToken))
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, errors.New(fmt.Sprintf("Could not create new Agent: %s", err.Error()))
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, errors.New(fmt.Sprintf("Invalid status code from API: %d", resp.StatusCode))
+	}
+	newAgent := new(models.Agent)
+	err = json.NewDecoder(resp.Body).Decode(newAgent)
+	if err != nil {
+		return nil, errors.New(fmt.Sprintf("Could not unmarshal api response: %s", err.Error()))
+	}
+	return newAgent, nil
+
+}

internal/woodpecker/metrics.go

@@ -15,7 +15,7 @@ import (
 
 func QueueInfo(cfg *config.Config, target interface{}) error {
 	apiRoute := fmt.Sprintf("%s/api/queue/info", cfg.WoodpeckerInstance)
-	req, err := http.NewRequest("GET", apiRoute, nil)
+	req, err := http.NewRequest(http.MethodGet, apiRoute, nil)
 	if err != nil {
 		return errors.New(fmt.Sprintf("Could not create queue request: %s", err.Error()))
 	}