no need to ship patch version

also update ci ref

.woodpecker/main.yml

@@ -2,15 +2,18 @@ when:
   - event: push
     branch: main
 
+labels:
+  uploadfilter24.eu/instance-role: Woodpecker
+
 steps:
   test:
-    image: golang:1.21
+    image: golang:1.22
     commands:
       - go test ./...
   pre-release:
     image: woodpeckerci/plugin-docker-buildx
     settings:
-      platforms: linux/arm64/v8
+      platforms: linux/arm64/v8,linux/amd64
       repo: lerentis/woodpecker-autoscaler
       tags:
         - latest

.woodpecker/pr.yml

@@ -1,15 +1,18 @@
 when:
   - event: pull_request
 
+labels:
+  uploadfilter24.eu/instance-role: Woodpecker
+
 steps:
   test:
-    image: golang:1.21
+    image: golang:1.22
     commands:
       - go test ./...
   pr-build:
     image: woodpeckerci/plugin-docker-buildx
     settings:
-      platforms: linux/arm64/v8
+      platforms: linux/arm64/v8,linux/amd64
       repo: lerentis/woodpecker-autoscaler
       tags:
         - latest

.woodpecker/release.yml

@@ -1,15 +1,18 @@
 when:
   - event: tag
 
+labels:
+  uploadfilter24.eu/instance-role: Woodpecker
+
 steps:
   test:
-    image: golang:1.21
+    image: golang:1.22
     commands:
       - go test ./...
   release:
     image: woodpeckerci/plugin-docker-buildx
     settings:
-      platforms: linux/arm64/v8
+      platforms: linux/arm64/v8,linux/amd64
       repo: lerentis/woodpecker-autoscaler
       tags:
         - latest

CHANGELOG

@@ -0,0 +1,19 @@
+CHANGELOG 
+
+v1.1.0
+
+Updated Dependencies
+Restructured Main event loop
+Cost optimized mode to make use of the fully hour that is billed by hetzner
+
+v1.0.1
+
+Fix woodpecker agent decom
+
+v1.0.0
+
+First stable release
+
+v0.0.1
+
+First test release

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21 as build
+FROM golang:1.22 as build
 
 WORKDIR /app
 

README.md

@@ -28,12 +28,12 @@ env:
     value: "define_it"
   - name: WOODPECKER_AUTOSCALER_HCLOUD_INSTANCE_TYPE
     value: "cpx21"
-  - name: WOODPECKER_AUTOSCALER_HCLOUD_REGION
+  - name: WOODPECKER_AUTOSCALER_HCLOUD_LOCATION
-    value: "define_it"
-  - name: WOODPECKER_AUTOSCALER_HCLOUD_DATACENTER
     value: "define_it"
   - name: WOODPECKER_AUTOSCALER_HCLOUD_SSH_KEY
     value: "define_it"
+  - name: WOODPECKER_AUTOSCALER_COST_OPTIMIZED
+    value: "true"
 ```
 
 you can also create a secret manually with these information and reference the existing secret like this in the `values.yaml`:
@@ -79,9 +79,9 @@ WOODPECKER_AUTOSCALER_WOODPECKER_AGENT_SECRET="define_it"
 WOODPECKER_AUTOSCALER_WOODPECKER_API_TOKEN="define_it"
 WOODPECKER_AUTOSCALER_HCLOUD_TOKEN="define_it"
 WOODPECKER_AUTOSCALER_HCLOUD_INSTANCE_TYPE=cpx21
-WOODPECKER_AUTOSCALER_HCLOUD_REGION="define_it"
+WOODPECKER_AUTOSCALER_HCLOUD_LOCATION="define_it"
-WOODPECKER_AUTOSCALER_HCLOUD_DATACENTER="define_it"
 WOODPECKER_AUTOSCALER_HCLOUD_SSH_KEY="define_it"
+WOODPECKER_AUTOSCALER_COST_OPTIMIZED="true"
 ```
 
 Now reload the systemd daemons and start the service:

chart/woodpecker-autoscaler/values.yaml

@@ -53,9 +53,7 @@ env:
     value: "define_it"
   - name: WOODPECKER_AUTOSCALER_HCLOUD_INSTANCE_TYPE
     value: "cpx21"
-  - name: WOODPECKER_AUTOSCALER_HCLOUD_REGION
+  - name: WOODPECKER_AUTOSCALER_HCLOUD_LOCATION
-    value: "define_it"
-  - name: WOODPECKER_AUTOSCALER_HCLOUD_DATACENTER
     value: "define_it"
   - name: WOODPECKER_AUTOSCALER_HCLOUD_SSH_KEY
     value: "define_it"

cmd/woodpecker-autoscaler.go

@@ -13,6 +13,106 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
+func SpawnNewAgent(cfg *config.Config) {
+	agent, err := woodpecker.CreateWoodpeckerAgent(cfg)
+	if err != nil {
+		log.WithFields(log.Fields{
+			"Caller": "SpawnNewAgent",
+		}).Fatal(fmt.Sprintf("Error creating new agent: %s", err.Error()))
+	}
+	server, err := hetzner.CreateNewAgent(cfg, agent)
+	if err != nil {
+		log.WithFields(log.Fields{
+			"Caller": "SpawnNewAgent",
+		}).Fatal(fmt.Sprintf("Error spawning new agent: %s", err.Error()))
+	}
+	for {
+		server, err = hetzner.RefreshNodeInfo(cfg, server.ID)
+		if err != nil {
+			log.WithFields(log.Fields{
+				"Caller": "SpawnNewAgent",
+			}).Fatal(fmt.Sprintf("Failed to start Agent: %s", err.Error()))
+		}
+		if server.Status == hcloud.ServerStatusRunning {
+			log.WithFields(log.Fields{
+				"Caller": "SpawnNewAgent",
+			}).Infof("%s started!", server.Name)
+			break
+		}
+		log.WithFields(log.Fields{
+			"Caller": "SpawnNewAgent",
+		}).Infof("%s is in status %s", server.Name, server.Status)
+		time.Sleep(30 * time.Second)
+	}
+}
+
+func CheckJobs(cfg *config.Config, ownedNodes []hcloud.Server, pendingTasks int) {
+	log.WithFields(log.Fields{
+		"Caller": "CheckJobs",
+	}).Info("Checking if agents can be removed")
+	runningTasks, err := woodpecker.CheckRunning(cfg)
+	if err != nil {
+		log.WithFields(log.Fields{
+			"Caller": "CheckJobs",
+		}).Fatal(fmt.Sprintf("Error checking woodpecker queue: %s", err.Error()))
+	}
+	if (runningTasks <= len(ownedNodes) && runningTasks != 0) || pendingTasks > 0 {
+		log.WithFields(log.Fields{
+			"Caller": "CheckJobs",
+		}).Info("Still found running tasks. No agent to be removed")
+	} else {
+		if len(ownedNodes) == 0 {
+			log.WithFields(log.Fields{
+				"Caller": "CheckJobs",
+			}).Info("Nothing running and not owning any nodes")
+		} else {
+			log.WithFields(log.Fields{
+				"Caller": "CheckJobs",
+			}).Info("No tasks running. Will remove agents")
+			Decom(cfg, ownedNodes)
+		}
+	}
+}
+
+func Decom(cfg *config.Config, ownedNodes []hcloud.Server) {
+	for _, server := range ownedNodes {
+		if cfg.CostOptimizedMode {
+			runtime, err := hetzner.CheckRuntime(cfg, &server)
+			if err != nil {
+				log.WithFields(log.Fields{
+					"Caller": "Decom",
+				}).Warnf("Error while checking runtime of node %s: %s", server.Name, err.Error())
+			}
+			log.WithFields(log.Fields{
+				"Caller": "Decom",
+			}).Debugf("Node %s is running for %d", server.Name, runtime.Minute())
+			// Check if next check if sooner than the 60 Minute mark of the next hetzner check
+			// https://docs.hetzner.com/cloud/billing/faq/#how-do-you-bill-your-servers
+			if time.Duration(runtime.Add(time.Duration(cfg.CheckInterval)*time.Minute).Minute()) < (60 * time.Minute) {
+				log.WithFields(log.Fields{
+					"Caller": "Decom",
+				}).Infof("Skipping node termination of %s (running for %d Minutes) in Cost Optimized Mode", server.Name, runtime.Minute())
+				continue
+			}
+		}
+		agentId, err := hetzner.DecomNode(cfg, &server)
+		if err != nil {
+			log.WithFields(log.Fields{
+				"Caller": "Decom",
+			}).Warnf("Error while deleting node %s: %s", server.Name, err.Error())
+		}
+		err = woodpecker.DecomAgent(cfg, agentId)
+		if err != nil {
+			log.WithFields(log.Fields{
+				"Caller": "Decom",
+			}).Warnf("Could not delete node %s in woodpecker: %s", server.Name, err.Error())
+		}
+		log.WithFields(log.Fields{
+			"Caller": "Decom",
+		}).Infof("Deleted node %s", server.Name)
+	}
+}
+
 func main() {
 
 	cfg, err := config.GenConfig()
@@ -52,67 +152,13 @@ func main() {
 			"Caller": "Main",
 		}).Infof("Currently owning %d Agents", len(ownedNodes))
 		if pendingTasks > len(ownedNodes) {
-			server, err := hetzner.CreateNewAgent(cfg)
+			SpawnNewAgent(cfg)
-			if err != nil {
-				log.WithFields(log.Fields{
-					"Caller": "Main",
-				}).Fatal(fmt.Sprintf("Error spawning new agent: %s", err.Error()))
-			}
-			for {
-				server, err = hetzner.RefreshNodeInfo(cfg, server.ID)
-				if err != nil {
-					log.WithFields(log.Fields{
-						"Caller": "Main",
-					}).Fatal(fmt.Sprintf("Failed to start Agent: %s", err.Error()))
-				}
-				if server.Status == hcloud.ServerStatusRunning {
-					log.WithFields(log.Fields{
-						"Caller": "Main",
-					}).Infof("%s started!", server.Name)
-					break
-				}
-				log.WithFields(log.Fields{
-					"Caller": "Main",
-				}).Infof("%s is in status %s", server.Name, server.Status)
-				time.Sleep(30 * time.Second)
-			}
 		} else {
-			log.WithFields(log.Fields{
+			CheckJobs(cfg, ownedNodes, pendingTasks)
-				"Caller": "Main",
-			}).Info("Checking if agents can be removed")
-			runningTasks, err := woodpecker.CheckRunning(cfg)
-			if err != nil {
-				log.WithFields(log.Fields{
-					"Caller": "Main",
-				}).Fatal(fmt.Sprintf("Error checking woodpecker queue: %s", err.Error()))
-			}
-			if (runningTasks <= len(ownedNodes) && runningTasks != 0) || pendingTasks > 0 {
-				log.WithFields(log.Fields{
-					"Caller": "Main",
-				}).Info("Still found running tasks. No agent to be removed")
-			} else {
-				if len(ownedNodes) == 0 {
-					log.WithFields(log.Fields{
-						"Caller": "Main",
-					}).Infof("Nothing running and not owning any nodes. Recheck in %d", cfg.CheckInterval)
-				} else {
-					log.WithFields(log.Fields{
-						"Caller": "Main",
-					}).Info("No tasks running. Will remove agents")
-					for _, server := range ownedNodes {
-						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)
-						} else {
-							woodpecker.DecomAgent(cfg, agentId)
-						}
-					}
-				}
-			}
 		}
+		log.WithFields(log.Fields{
+			"Caller": "Main",
+		}).Infof("Recheck in %d", cfg.CheckInterval)
 		time.Sleep(time.Duration(cfg.CheckInterval) * time.Minute)
 	}
 }

go.mod

@@ -1,29 +1,25 @@
 module git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler
 
-go 1.21.1
+go 1.22
 
 require (
-	github.com/gorilla/mux v1.8.0
+	github.com/gorilla/mux v1.8.1
-	github.com/hetznercloud/hcloud-go v1.52.0
+	github.com/hetznercloud/hcloud-go v1.56.0
-	github.com/jinzhu/configor v1.2.1
+	github.com/jinzhu/configor v1.2.2
 	github.com/sirupsen/logrus v1.9.3
 )
 
 require (
-	github.com/BurntSushi/toml v0.3.1 // indirect
+	github.com/BurntSushi/toml v1.4.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/prometheus/client_golang v1.19.1 // indirect
-	github.com/kr/text v0.2.0 // indirect
+	github.com/prometheus/client_model v0.6.1 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/prometheus/common v0.54.0 // indirect
-	github.com/prometheus/client_golang v1.16.0 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
-	github.com/prometheus/client_model v0.3.0 // indirect
+	golang.org/x/net v0.26.0 // indirect
-	github.com/prometheus/common v0.42.0 // indirect
+	golang.org/x/sys v0.21.0 // indirect
-	github.com/prometheus/procfs v0.10.1 // indirect
+	golang.org/x/text v0.16.0 // indirect
-	github.com/rogpeppe/go-internal v1.11.0 // indirect
+	google.golang.org/protobuf v1.34.1 // indirect
-	golang.org/x/net v0.12.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
-	golang.org/x/sys v0.10.0 // indirect
-	golang.org/x/text v0.11.0 // indirect
-	google.golang.org/protobuf v1.30.0 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

go.sum

@@ -1,70 +1,55 @@
-github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+github.com/BurntSushi/toml v1.2.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/toml v1.4.0 h1:kuoIxZQy2WRRk1pttg9asf+WVv6tWQuBNVmK8+nqPr0=
+github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
-github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
-github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
-github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
+github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=
-github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/hetznercloud/hcloud-go v1.56.0 h1:Swf7cFQAae5r+76Fom9JVPpWqMIs49UxIOROLjBE1vc=
-github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/hetznercloud/hcloud-go v1.56.0/go.mod h1:oTebZCjd+osj75jlI76Z+zjN1sTxmMiQ1MWoO8aRl1c=
-github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/jinzhu/configor v1.2.2 h1:sLgh6KMzpCmaQB4e+9Fu/29VErtBUqsS2t8C9BNIVsA=
-github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/jinzhu/configor v1.2.2/go.mod h1:iFFSfOBKP3kC2Dku0ZGB3t3aulfQgTGJknodhFavsU8=
-github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
-github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
-github.com/hetznercloud/hcloud-go v1.52.0 h1:3r9pEulTOBB9BoArSgpQYUQVTy+Xjkg0k/QAU4c6dQ8=
-github.com/hetznercloud/hcloud-go v1.52.0/go.mod h1:VzDWThl47lOnZXY0q5/LPFD+M62pfe/52TV+mOrpp9Q=
-github.com/jinzhu/configor v1.2.1 h1:OKk9dsR8i6HPOCZR8BcMtcEImAFjIhbJFZNyn5GCZko=
-github.com/jinzhu/configor v1.2.1/go.mod h1:nX89/MOmDba7ZX7GCyU/VIaQ2Ar2aizBl2d3JLF/rDc=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
-github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_golang v1.16.0 h1:yk/hx9hDbrGHovbci4BY+pRMfSuuat626eFsHb7tmT8=
+github.com/prometheus/client_golang v1.19.1 h1:wZWJDwK+NameRJuPGDhlnFgx8e8HN3XHQeLaYJFJBOE=
-github.com/prometheus/client_golang v1.16.0/go.mod h1:Zsulrv/L9oM40tJ7T815tM89lFEugiJ9HzIqaAx4LKc=
+github.com/prometheus/client_golang v1.19.1/go.mod h1:mP78NwGzrVks5S2H6ab8+ZZGJLZUq1hoULYBAYBw1Ho=
-github.com/prometheus/client_model v0.3.0 h1:UBgGFHqYdG/TPFD1B1ogZywDqEkwp3fBMvqdiQ7Xew4=
+github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
-github.com/prometheus/client_model v0.3.0/go.mod h1:LDGWKZIo7rky3hgvBe+caln+Dr3dPggB5dvjtD7w9+w=
+github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
-github.com/prometheus/common v0.42.0 h1:EKsfXEYo4JpWMHH5cg+KOUWeuJSov1Id8zGR8eeI1YM=
+github.com/prometheus/common v0.54.0 h1:ZlZy0BgJhTwVZUn7dLOkwCZHUkrAqd3WYtcFCWnM1D8=
-github.com/prometheus/common v0.42.0/go.mod h1:xBwqVerjNdUDjgODMpudtOMwlOwf2SaTr1yjz4b7Zbc=
+github.com/prometheus/common v0.54.0/go.mod h1:/TQgMJP5CuVYveyT7n/0Ix8yLNNXy9yRSkhnLTHPDIQ=
-github.com/prometheus/procfs v0.10.1 h1:kYK1Va/YMlutzCGazswoHKo//tZVlFpKYh+PymziUAg=
+github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
-github.com/prometheus/procfs v0.10.1/go.mod h1:nwNm2aOCAYw8uTR/9bWRREkZFxAUcWzPHWJq+XBB/FM=
+github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
-github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M=
+github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
-github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=
+github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
 github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-golang.org/x/net v0.12.0 h1:cfawfvKITfUsFCeJIHJrbSxpeu/E81khclypR0GVT50=
+golang.org/x/net v0.26.0 h1:soB7SVo0PWrY4vPW/+ay0jKDNScG2X9wFeYlXIvJsOQ=
-golang.org/x/net v0.12.0/go.mod h1:zEVYFnQC7m/vmpQFELhcD1EWkZlX69l4oqgmer6hfKA=
+golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE=
-golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA=
+golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
-golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.11.0 h1:LAntKIrcmeSKERyiOh0XMV39LXS8IE9UL2yP7+f5ij4=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
-golang.org/x/text v0.11.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.34.1 h1:9ddQBjfCyZPOHPUiPxpYESBLc+T8P3E+Vo4IbKZgFWg=
-google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.34.1/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
-google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
-google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/config/config.go

@@ -12,6 +12,7 @@ type Config = struct {
 	LogLevel                string `default:"Info" env:"WOODPECKER_AUTOSCALER_LOGLEVEL"`
 	CheckInterval           int    `default:"15" env:"WOODPECKER_AUTOSCALER_CHECK_INTERVAL"`
 	DryRun                  bool   `default:"false" env:"WOODPECKER_AUTOSCALER_DRY_RUN"`
+	CostOptimizedMode       bool   `default:"false" env:"WOODPECKER_AUTOSCALER_COST_OPTIMIZED"`
 	WoodpeckerLabelSelector string `default:"uploadfilter24.eu/instance-role=Woodpecker" env:"WOODPECKER_AUTOSCALER_WOODPECKER_LABEL_SELECTOR"`
 	WoodpeckerInstance      string `default:"" env:"WOODPECKER_AUTOSCALER_WOODPECKER_INSTANCE"`
 	WoodpeckerGrpc          string `default:"" env:"WOODPECKER_AUTOSCALER_WOODPECKER_GRPC"`

internal/hetzner/hetzneragent.go

@@ -5,10 +5,13 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"strconv"
 	"strings"
 	"text/template"
+	"time"
 
 	"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 +45,14 @@ 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 +70,9 @@ 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 +93,7 @@ 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 +101,7 @@ 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 +142,28 @@ 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) {
@@ -158,3 +174,12 @@ func RefreshNodeInfo(cfg *config.Config, serverID int) (*hcloud.Server, error) {
 	}
 	return server, nil
 }
+
+func CheckRuntime(cfg *config.Config, server *hcloud.Server) (time.Time, error) {
+	server, err := RefreshNodeInfo(cfg, server.ID)
+	now := time.Now()
+	if err != nil {
+		return time.Time{}, errors.New(fmt.Sprintf("Could not check Runtime: %s", err.Error()))
+	}
+	return server.Created.Add(time.Duration(now.Minute())), nil
+}

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/models/structs.go

@@ -90,3 +90,8 @@ type Agent struct {
 type AgentList struct {
 	Agents []Agent
 }
+
+type AgentRequest struct {
+	Name       string `json:"name"`
+	NoSchedule bool   `json:"no_schedule"`
+}

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 {
@@ -23,7 +25,7 @@ func DecomAgent(cfg *config.Config, agentId int) error {
 
 	log.WithFields(log.Fields{
 		"Caller": "DecomAgent",
-	}).Debugf("Deleting %d agent from woodpecker", agentId)
+	}).Debugf("Deleting agent with id %d from woodpecker", agentId)
 
 	resp, err := http.DefaultClient.Do(req)
 	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 +69,67 @@ 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.AgentRequest{
+		Name:       name,
+		NoSchedule: false,
+	}
+	jsonBody, _ := json.Marshal(agentRequest)
+	bodyReader := bytes.NewReader(jsonBody)
+
+	apiRoute := fmt.Sprintf("%s/api/agents", cfg.WoodpeckerInstance)
+	log.WithFields(log.Fields{
+		"Caller": "CreateWoodpeckerAgent",
+	}).Debugf("Sending the following data to %s: %s", apiRoute, jsonBody)
+	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("Content-Type", "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()))
 	}
@@ -29,7 +29,7 @@ func QueueInfo(cfg *config.Config, target interface{}) error {
 	defer resp.Body.Close()
 
 	if resp.StatusCode != 200 {
-		return errors.New(fmt.Sprintf("Error from queue info api: %s", err.Error()))
+		return errors.New(fmt.Sprintf("Error from queue info api: %s", resp.Status))
 	}
 
 	return json.NewDecoder(resp.Body).Decode(target)