2025-10-06 09:21:58 +00:00
17 changed files with 774 additions and 1 deletions
--- a/.gitea/workflows/main.yaml
+++ b/.gitea/workflows/main.yaml
@@ -0,0 +1,49 @@
+name: Gitea Docker Build Demo
+run-name: Reference Branch Build 🚀
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  Test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.24.x'
+      - name: Test with the Go CLI
+        run: go test ./...
+  Build_Image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Set up Cosign
+        uses: sigstore/cosign-installer@v3.10.0
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          driver: remote
+          endpoint: tcp://buildkit-service.buildkit-service.svc:1234
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_PASSWORD }}
+      - name: Build and Push the Docker Image
+        uses: docker/build-push-action@v6
+        id: build-and-push
+        with:
+            context: .
+            file: ./Dockerfile
+            push: false
+            tags: |
+              lerentis/canada-kaktus:{{ github.sha }}
+      - name: Sign the published Docker image
+        env:
+          COSIGN_EXPERIMENTAL: "true"
+        run: cosign sign lerentis/canada-kaktus:${{ github.sha }}@${{ steps.build-and-push.outputs.digest }}
--- a/.gitea/workflows/pr.yaml
+++ b/.gitea/workflows/pr.yaml
@@ -0,0 +1,34 @@
+name: PR Build
+run-name: ${{ gitea.actor }} is testing out Gitea Actions 🚀
+on: [pull_request]
+
+jobs:
+  Test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.24.x'
+      - name: Test with the Go CLI
+        run: go test ./...
+  Build_Image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          driver: remote
+          endpoint: tcp://buildkit-service.buildkit-service.svc:1234
+      - name: Build and Push the Docker Image
+        uses: docker/build-push-action@v6
+        with:
+            context: .
+            file: ./Dockerfile
+            push: false
+            tags: |
+              lerentis/canada-kaktus:latest
--- a/.gitea/workflows/release.yaml
+++ b/.gitea/workflows/release.yaml
@@ -0,0 +1,46 @@
+name: Release
+run-name: ${{ gitea.actor }} is Releasing a new version 🚀
+on: [release]
+
+jobs:
+  Test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.24.x'
+      - name: Test with the Go CLI
+        run: go test ./...
+  Build_Image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Set up Cosign
+        uses: sigstore/cosign-installer@v3.10.0
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          driver: remote
+          endpoint: tcp://buildkit-service.buildkit-service.svc:1234
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_PASSWORD }}
+      - name: Build and Push the Docker Image
+        uses: docker/build-push-action@v6
+        id: build-and-push
+        with:
+            context: .
+            file: ./Dockerfile
+            push: true
+            tags: |
+              lerentis/canada-kaktus:{{ github.event.release.tag_name }}
+      - name: Sign the published Docker image
+        env:
+          COSIGN_EXPERIMENTAL: "true"
+        run: cosign sign lerentis/canada-kaktus:${{ github.event.release.tag_name }}@${{ steps.build-and-push.outputs.digest }}
--- a/18
+++ b/18
@@ -0,0 +1,18 @@
+FROM golang:1.24 as build
+
+WORKDIR /app
+
+COPY . .
+
+RUN go mod tidy && CGO_ENABLED=0 GOOS=linux go build -a -tags netgo -ldflags '-w -extldflags "-static"' -o canada-kaktus ./cmd/
+
+FROM scratch
+
+COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+COPY --from=build /etc/passwd /etc/passwd
+COPY --from=build /etc/group /etc/group
+COPY --from=build --chown=65534:65534 /app/canada-kaktus /usr/local/bin/canada-kaktus
+
+USER nobody
+
+ENTRYPOINT ["/usr/local/bin/canada-kaktus"]
--- a/README.md
+++ b/README.md
@@ -1,2 +1,2 @@
-# mail-dns-service
+# canada-kaktus

--- a/cmd/main.go
+++ b/cmd/main.go
@@ -0,0 +1,59 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"git.uploadfilter24.eu/covidnetes/canada-kaktus/internal"
+	"git.uploadfilter24.eu/covidnetes/canada-kaktus/internal/utils"
+	log "github.com/sirupsen/logrus"
+)
+
+func main() {
+
+	cfg, err := internal.GenConfig()
+	utils.ConfigureLogger(cfg)
+
+	if err != nil {
+		log.WithFields(log.Fields{
+			"Caller": "Main",
+		}).Fatal(fmt.Sprintf("Error generating Config: %s", err.Error()))
+	}
+
+	go func() {
+		log.WithFields(log.Fields{
+			"Caller": "Main",
+		}).Info("Starting Health Endpoint")
+		internal.StartHealthEndpoint()
+	}()
+
+	log.WithFields(log.Fields{
+		"Caller": "Main",
+	}).Info("Entering main event loop")
+
+	for {
+		servers, err := internal.GetAllNodes(cfg)
+		if err != nil {
+			log.WithFields(log.Fields{
+				"Caller": "Main",
+			}).Error(fmt.Sprintf("Error getting all Nodes: %s", err.Error()))
+		}
+		ips, err := internal.GetAllIps(servers)
+		if err != nil {
+			log.WithFields(log.Fields{
+				"Caller": "Main",
+			}).Error(fmt.Sprintf("Error getting all IPs: %s", err.Error()))
+		}
+		err = internal.RecreateIPPoolCrd(cfg, "covidnetes-pool", ips)
+		if err != nil {
+			log.WithFields(log.Fields{
+				"Caller": "Main",
+			}).Error(fmt.Sprintf("Error recreating IP Pool CRD: %s", err.Error()))
+		} else {
+			log.WithFields(log.Fields{
+				"Caller": "Main",
+			}).Info("Successfully recreated IP Pool CRD")
+		}
+		time.Sleep(15 * time.Minute)
+	}
+}
--- a/go.mod
+++ b/go.mod
@@ -0,0 +1,48 @@
+module git.uploadfilter24.eu/covidnetes/canada-kaktus
+
+go 1.24.0
+
+require (
+	github.com/gorilla/mux v1.8.1
+	github.com/hetznercloud/hcloud-go v1.59.2
+	github.com/jinzhu/configor v1.2.2
+	github.com/sirupsen/logrus v1.9.3
+	k8s.io/client-go v0.34.1
+)
+
+require (
+	github.com/BurntSushi/toml v1.5.0 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
+	github.com/go-logr/logr v1.4.3 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/prometheus/client_golang v1.23.2 // indirect
+	github.com/prometheus/client_model v0.6.2 // indirect
+	github.com/prometheus/common v0.66.1 // indirect
+	github.com/prometheus/procfs v0.17.0 // indirect
+	github.com/x448/float16 v0.8.4 // indirect
+	go.yaml.in/yaml/v2 v2.4.3 // indirect
+	golang.org/x/net v0.44.0 // indirect
+	golang.org/x/oauth2 v0.31.0 // indirect
+	golang.org/x/sys v0.36.0 // indirect
+	golang.org/x/term v0.35.0 // indirect
+	golang.org/x/text v0.29.0 // indirect
+	golang.org/x/time v0.13.0 // indirect
+	google.golang.org/protobuf v1.36.10 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	k8s.io/api v0.34.1 // indirect
+	k8s.io/apimachinery v0.34.1 // indirect
+	k8s.io/klog/v2 v2.130.1 // indirect
+	k8s.io/utils v0.0.0-20251002143259-bc988d571ff4 // indirect
+	sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect
+	sigs.k8s.io/randfill v1.0.0 // indirect
+	sigs.k8s.io/structured-merge-diff/v6 v6.3.0 // indirect
+	sigs.k8s.io/yaml v1.6.0 // indirect
+)
--- a/go.sum
+++ b/go.sum
@@ -0,0 +1,166 @@
+github.com/BurntSushi/toml v1.2.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg=
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+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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--- a/internal/config.go
+++ b/internal/config.go
@@ -0,0 +1,30 @@
+package internal
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/jinzhu/configor"
+)
+
+type Config = struct {
+	LogLevel      string `default:"Info" env:"CANADA_KAKTUS_LOGLEVEL"`
+	LabelSelector string `default:"kops.k8s.io/instance-role=Node" env:"CANADA_KAKTUS_LABELSELECTOR"`
+	HcloudToken   string `default:"" env:"CANADA_KAKTUS_HCLOUD_TOKEN"`
+}
+
+func GenConfig() (cfg *Config, err error) {
+
+	cfg = &Config{}
+
+	err = configor.New(&configor.Config{
+		ENVPrefix:          "CANADA_KAKTUS",
+		AutoReload:         true,
+		Silent:             true,
+		AutoReloadInterval: time.Minute}).Load(cfg, "config.json")
+	if err != nil {
+		return nil, fmt.Errorf("error generating Config: %s", err.Error())
+	}
+	return cfg, nil
+
+}
--- a/internal/config_test.go
+++ b/internal/config_test.go
@@ -0,0 +1,22 @@
+package internal
+
+import (
+	"reflect"
+	"testing"
+)
+
+var defaultConfig = Config{
+	LogLevel:      "Info",
+	LabelSelector: "kops.k8s.io/instance-role=Node",
+	HcloudToken:   "",
+}
+
+func TestConfigDefaults(t *testing.T) {
+	cfg, err := GenConfig()
+	if err != nil {
+		t.Errorf("%s", err.Error())
+	}
+	if !reflect.DeepEqual(&defaultConfig, cfg) {
+		t.Errorf("got %+v, want %+v", cfg, defaultConfig)
+	}
+}
--- a/internal/health.go
+++ b/internal/health.go
@@ -0,0 +1,31 @@
+package internal
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/gorilla/mux"
+	log "github.com/sirupsen/logrus"
+)
+
+func StartHealthEndpoint() {
+	r := mux.NewRouter()
+	r.Use(mux.CORSMethodMiddleware(r))
+	r.HandleFunc("/health", send200).Methods(http.MethodGet)
+	err := http.ListenAndServe("0.0.0.0:8080", r)
+	if err != nil {
+		log.WithFields(log.Fields{
+			"Caller": "StartHealthEndpoint",
+		}).Error(fmt.Sprintf("Error creating health endpoint: %s", err.Error()))
+	}
+}
+
+func send200(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusOK)
+	_, err := w.Write([]byte{})
+	if err != nil {
+		log.WithFields(log.Fields{
+			"Caller": "send200",
+		}).Error(fmt.Sprintf("Error answering health endpoint: %s", err.Error()))
+	}
+}
--- a/internal/health_test.go
+++ b/internal/health_test.go
@@ -0,0 +1,23 @@
+package internal
+
+import (
+	"net/http"
+	"strings"
+	"testing"
+)
+
+func TestHealth(t *testing.T) {
+	go func() {
+		StartHealthEndpoint()
+	}()
+	request, _ := http.NewRequest(http.MethodGet, "http://localhost:8080/health", strings.NewReader(""))
+	resp, err := http.DefaultClient.Do(request)
+
+	if err != nil {
+		t.Errorf("Health endpoint did not start: %v", err)
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		t.Errorf("Bad response from health endpoint. Want: %d, got %d", http.StatusOK, resp.StatusCode)
+	}
+}
--- a/internal/hetzner.go
+++ b/internal/hetzner.go
@@ -0,0 +1,40 @@
+package internal
+
+import (
+	"context"
+	"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, fmt.Errorf("error listing Hetzner Nodes: %s", err.Error())
+	}
+
+	if servers == nil {
+		return nil, fmt.Errorf("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 instance.PublicNet.IPv4.IP == nil {
+			return []string{""}, fmt.Errorf("instance %s has no public Addresses", instance.Name)
+		}
+		log.WithFields(log.Fields{
+			"Caller": "GetAllIps",
+		}).Info(fmt.Sprintf("Found IP: %s", instance.PrivateNet[0].IP.String()))
+		ips[i] = instance.PublicNet.IPv4.IP.String()
+	}
+	return ips, nil
+}
--- a/internal/hetzner_test.go
+++ b/internal/hetzner_test.go
@@ -0,0 +1,30 @@
+package internal
+
+import (
+	"testing"
+
+	"github.com/hetznercloud/hcloud-go/hcloud"
+)
+
+func TestGetAllIps(t *testing.T) {
+
+	servers := []*hcloud.Server{{
+		Status: hcloud.ServerStatusRunning,
+		Name:   "Test",
+	}}
+
+	servers = append(servers, &hcloud.Server{
+		Status: hcloud.ServerStatusRunning,
+		Name:   "Test2",
+	})
+
+	expectedError := "instance Test has no public Addresses"
+	_, err := GetAllIps(servers)
+	if err == nil {
+		t.Error("GetAllIps did not error with missing data")
+	}
+	if err.Error() != expectedError {
+		t.Errorf("Wrong error message. want %s, got %s", expectedError, err.Error())
+	}
+
+}
--- a/internal/k8s.go
+++ b/internal/k8s.go
@@ -0,0 +1,111 @@
+package internal
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"html/template"
+
+	"k8s.io/client-go/kubernetes/scheme"
+	"k8s.io/client-go/rest"
+)
+
+var IP_POOL_TEMPLATE = `
+{
+    "apiVersion": "cilium.io/v2alpha1",
+    "kind": "CiliumLoadBalancerIPPool",
+    "metadata": {
+        "name": "{{ .Name }}",
+        "annotations": {
+            "argocd.argoproj.io/tracking-id": "cilium-lb:cilium.io/CiliumLoadBalancerIPPool:kube-system/covidnetes-pool"
+        }
+    },
+    "spec": {
+        "blocks": [
+            {{- range $i, $ip := .IPs }}
+            {{- if $i}},{{ end }}
+            {
+                "cidr": "{{ $ip }}"
+            }
+            {{- end }}
+        ],
+        "disabled": false
+    }
+}
+`
+
+type CrdConfig struct {
+	Name string
+	IPs  []string
+}
+
+func RecreateIPPoolCrd(cfg *Config, name string, ips []string) error {
+
+	routeclient, err := createRestClient()
+
+	if err != nil {
+		return fmt.Errorf("error creating REST Client: %v", err.Error())
+	}
+
+	body, err := generateIpPool(name, ips)
+
+	if err != nil {
+		return fmt.Errorf("error generating CRD: %v", err.Error())
+	}
+
+	decode := scheme.Codecs.UniversalDeserializer().Decode
+
+	obj, _, err := decode([]byte(body), nil, nil)
+	if err != nil {
+		return fmt.Errorf("could not deserialize CRD: %v", err.Error())
+	}
+
+	res := routeclient.Post().
+		Resource("routes").
+		Body(&obj).
+		Do(context.TODO())
+
+	var status int
+	res.StatusCode(&status)
+
+	if status >= 200 && status <= 400 {
+		return fmt.Errorf("failed to post CRD to kube api: %v", res.Error().Error())
+	}
+
+	return nil
+}
+
+func createRestClient() (*rest.RESTClient, error) {
+	k8s_config, err := rest.InClusterConfig()
+	if err != nil {
+		return nil, fmt.Errorf("could not create in cluster k8s config: %v", err)
+	}
+
+	k8s_config.APIPath = "/apis"
+	k8s_config.NegotiatedSerializer = scheme.Codecs.WithoutConversion()
+
+	routeclient, err := rest.RESTClientFor(k8s_config)
+
+	if err != nil {
+		return nil, fmt.Errorf("could not create k8s client: %v", err)
+	}
+	return routeclient, nil
+
+}
+
+func generateIpPool(name string, ips []string) (string, error) {
+	config := CrdConfig{
+		Name: name,
+		IPs:  ips,
+	}
+	tmpl, err := template.New("ippool").Parse(IP_POOL_TEMPLATE)
+	if err != nil {
+		return "", fmt.Errorf("errors in ippool template: %s", err.Error())
+	}
+	var buf bytes.Buffer
+	err = tmpl.Execute(&buf, &config)
+	if err != nil {
+		return "", fmt.Errorf("could not render ippool template: %s", err.Error())
+	}
+	return buf.String(), nil
+}
--- a/internal/k8s_test.go
+++ b/internal/k8s_test.go
@@ -0,0 +1,38 @@
+package internal
+
+import (
+	"testing"
+)
+
+func TestGenerateIpPoolCRD(t *testing.T) {
+	expected_ip_pool := `
+{
+    "apiVersion": "cilium.io/v2alpha1",
+    "kind": "CiliumLoadBalancerIPPool",
+    "metadata": {
+        "name": "covidnetes-pool",
+        "annotations": {
+            "argocd.argoproj.io/tracking-id": "cilium-lb:cilium.io/CiliumLoadBalancerIPPool:kube-system/covidnetes-pool"
+        }
+    },
+    "spec": {
+        "blocks": [
+            {
+                "cidr": "49.13.48.9/32"
+            },
+            {
+                "cidr": "91.107.211.117/32"
+            }
+        ],
+        "disabled": false
+    }
+}
+`
+	got, err := generateIpPool("covidnetes-pool", []string{"49.13.48.9/32", "91.107.211.117/32"})
+	if err != nil {
+		t.Errorf("%s", err.Error())
+	}
+	if expected_ip_pool != got {
+		t.Errorf("got %+v, want %+v", got, expected_ip_pool)
+	}
+}
--- a/internal/utils/logging.go
+++ b/internal/utils/logging.go
@@ -0,0 +1,28 @@
+package utils
+
+import (
+	"os"
+
+	"git.uploadfilter24.eu/covidnetes/canada-kaktus/internal"
+	log "github.com/sirupsen/logrus"
+)
+
+func ConfigureLogger(cfg *internal.Config) {
+
+	switch cfg.LogLevel {
+	case "Debug":
+		log.SetLevel(log.DebugLevel)
+	case "Info":
+		log.SetLevel(log.InfoLevel)
+	case "Warn":
+		log.SetLevel(log.WarnLevel)
+	case "Error":
+		log.SetLevel(log.ErrorLevel)
+	default:
+		log.SetLevel(log.InfoLevel)
+		log.Warnf("Home: invalid log level supplied: '%s'", cfg.LogLevel)
+	}
+
+	log.SetFormatter(&log.JSONFormatter{})
+	log.SetOutput(os.Stdout)
+}