diff --git a/.woodpecker/main.yaml b/.woodpecker/main.yaml new file mode 100644 index 0000000..bfdc98c --- /dev/null +++ b/.woodpecker/main.yaml @@ -0,0 +1,29 @@ +when: + - event: push + branch: main + +steps: + test: + image: golang:1.21 + commands: + - go test ./... + pre-release: + image: woodpeckerci/plugin-docker-buildx + settings: + platforms: linux/arm64/v8,linux/amd64 + repo: lerentis/woodpecker-autoscaler + tags: + - latest + - ${CI_COMMIT_SHA} + password: + from_secret: docker_hub_password + username: + from_secret: docker_hub_username + notify: + image: appleboy/drone-telegram + settings: + message: "Commit {{ commit.message }} ({{ commit.link }}) ran with build {{ build.number }} and finished with status {{ build.status }}." + to: + from_secret: telegram_userid + token: + from_secret: telegram_secret \ No newline at end of file diff --git a/.woodpecker/pr.yaml b/.woodpecker/pr.yaml new file mode 100644 index 0000000..abb8fb1 --- /dev/null +++ b/.woodpecker/pr.yaml @@ -0,0 +1,25 @@ +when: + - event: pull_request + +steps: + test: + image: golang:1.21 + commands: + - go test ./... + pr-build: + image: woodpeckerci/plugin-docker-buildx + settings: + platforms: linux/arm64/v8,linux/amd64 + repo: lerentis/woodpecker-autoscaler + tags: + - latest + - ${CI_COMMIT_SHA} + dry-run: true + notify: + image: appleboy/drone-telegram + settings: + message: "Commit {{ commit.message }} ({{ commit.link }}) ran with build {{ build.number }} and finished with status {{ build.status }}." + to: + from_secret: telegram_userid + token: + from_secret: telegram_secret \ No newline at end of file diff --git a/.woodpecker/release.yaml b/.woodpecker/release.yaml new file mode 100644 index 0000000..b2d7d97 --- /dev/null +++ b/.woodpecker/release.yaml @@ -0,0 +1,28 @@ +when: + - event: tag + +steps: + test: + image: golang:1.21 + commands: + - go test ./... + release: + image: woodpeckerci/plugin-docker-buildx + settings: + platforms: linux/arm64/v8,linux/amd64 + repo: lerentis/woodpecker-autoscaler + tags: + - latest + - ${CI_COMMIT_TAG} + password: + from_secret: docker_hub_password + username: + from_secret: docker_hub_username + notify: + image: appleboy/drone-telegram + settings: + message: "Commit {{ commit.message }} ({{ commit.link }}) ran with build {{ build.number }} and finished with status {{ build.status }}." + to: + from_secret: telegram_userid + token: + from_secret: telegram_secret \ No newline at end of file diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..b11be5d --- /dev/null +++ b/Dockerfile @@ -0,0 +1,18 @@ +FROM golang:1.21 as build + +WORKDIR /app + +COPY . . + +RUN go mod tidy && CGO_ENABLED=0 GOOS=linux go build -a -tags netgo -ldflags '-w -extldflags "-static"' -o mail-dns-service ./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/mail-dns-service /usr/local/bin/mail-dns-service + +USER nobody + +ENTRYPOINT ["/usr/local/bin/mail-dns-service"] diff --git a/cmd/main.go b/cmd/main.go new file mode 100644 index 0000000..47d538a --- /dev/null +++ b/cmd/main.go @@ -0,0 +1,37 @@ +package main + +import ( + "fmt" + "time" + + "git.uploadfilter24.eu/covidnetes/mail-dns-service/internal" + "git.uploadfilter24.eu/covidnetes/mail-dns-service/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 { + time.Sleep(15 * time.Minute) + } +} diff --git a/cmd/main_test.go b/cmd/main_test.go new file mode 100644 index 0000000..06ab7d0 --- /dev/null +++ b/cmd/main_test.go @@ -0,0 +1 @@ +package main diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..f7f5e80 --- /dev/null +++ b/go.mod @@ -0,0 +1,57 @@ +module git.uploadfilter24.eu/covidnetes/mail-dns-service + +go 1.21.1 + +require ( + github.com/gorilla/mux v1.8.1 + github.com/hetznercloud/hcloud-go v1.53.0 + github.com/jinzhu/configor v1.2.2 + github.com/sirupsen/logrus v1.9.3 + k8s.io/client-go v0.29.3 +) + +require ( + github.com/BurntSushi/toml v1.3.2 // indirect + github.com/beorn7/perks v1.0.1 // indirect + github.com/cespare/xxhash/v2 v2.2.0 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/emicklei/go-restful/v3 v3.11.0 // indirect + github.com/go-logr/logr v1.3.0 // indirect + github.com/go-openapi/jsonpointer v0.19.6 // indirect + github.com/go-openapi/jsonreference v0.20.2 // indirect + github.com/go-openapi/swag v0.22.3 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/protobuf v1.5.4 // indirect + github.com/google/gnostic-models v0.6.8 // indirect + github.com/google/gofuzz v1.2.0 // indirect + github.com/google/uuid v1.3.0 // indirect + github.com/josharian/intern v1.0.0 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/mailru/easyjson v0.7.7 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect + github.com/prometheus/client_golang v1.18.0 // indirect + github.com/prometheus/client_model v0.5.0 // indirect + github.com/prometheus/common v0.46.0 // indirect + github.com/prometheus/procfs v0.12.0 // indirect + golang.org/x/net v0.20.0 // indirect + golang.org/x/oauth2 v0.16.0 // indirect + golang.org/x/sys v0.16.0 // indirect + golang.org/x/term v0.16.0 // indirect + golang.org/x/text v0.14.0 // indirect + golang.org/x/time v0.3.0 // indirect + google.golang.org/appengine v1.6.7 // indirect + google.golang.org/protobuf v1.33.0 // indirect + gopkg.in/inf.v0 v0.9.1 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect + k8s.io/api v0.29.3 // indirect + k8s.io/apimachinery v0.29.3 // indirect + k8s.io/klog/v2 v2.110.1 // indirect + k8s.io/kube-openapi v0.0.0-20231010175941-2dd684a91f00 // indirect + k8s.io/utils v0.0.0-20230726121419-3b25d923346b // indirect + sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect + sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect + sigs.k8s.io/yaml v1.3.0 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..153f620 --- /dev/null +++ b/go.sum @@ -0,0 +1,175 @@ +github.com/BurntSushi/toml v1.2.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ= +github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8= +github.com/BurntSushi/toml v1.3.2/go.mod 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h1:a2VclLzOGrwOHDiV8EfBGhvjHvP46CtW5j6POvhYGGo= +sigs.k8s.io/yaml v1.3.0/go.mod h1:GeOyir5tyXNByN85N/dRIT9es5UQNerPYEKK56eTBm8= diff --git a/internal/config.go b/internal/config.go new file mode 100644 index 0000000..f9fe4ef --- /dev/null +++ b/internal/config.go @@ -0,0 +1,31 @@ +package internal + +import ( + "errors" + "fmt" + "time" + + "github.com/jinzhu/configor" +) + +type Config = struct { + LogLevel string `default:"Info" env:"MAIL_DNS_SERVICE_LOGLEVEL"` + LabelSelector string `default:"kops.k8s.io/instance-role=Node" env:"MAIL_DNS_SERVICE_LABELSELECTOR"` + HcloudToken string `default:"" env:"MAIL_DNS_SERVICE_HCLOUD_TOKEN"` +} + +func GenConfig() (cfg *Config, err error) { + + cfg = &Config{} + + err = configor.New(&configor.Config{ + ENVPrefix: "METALLB_IP_FLOATER", + AutoReload: true, + Silent: true, + AutoReloadInterval: time.Minute}).Load(cfg, "config.json") + if err != nil { + return nil, errors.New(fmt.Sprintf("Error generating Config: %s", err.Error())) + } + return cfg, nil + +} diff --git a/internal/config_test.go b/internal/config_test.go new file mode 100644 index 0000000..b7edd7f --- /dev/null +++ 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) + } +} diff --git a/internal/health.go b/internal/health.go new file mode 100644 index 0000000..bbe2592 --- /dev/null +++ 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())) + } +} diff --git a/internal/health_test.go b/internal/health_test.go new file mode 100644 index 0000000..e7e8ed7 --- /dev/null +++ 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) + } +} diff --git a/internal/hetzner.go b/internal/hetzner.go new file mode 100644 index 0000000..6bdf061 --- /dev/null +++ b/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 +} diff --git a/internal/hetzner_test.go b/internal/hetzner_test.go new file mode 100644 index 0000000..91741d3 --- /dev/null +++ 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 attached IP" + _, 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()) + } + +} diff --git a/internal/k8s.go b/internal/k8s.go new file mode 100644 index 0000000..9e6a39e --- /dev/null +++ b/internal/k8s.go @@ -0,0 +1,61 @@ +package internal + +import ( + "bytes" + "errors" + "fmt" + "html/template" + + "k8s.io/client-go/kubernetes" + "k8s.io/client-go/rest" +) + +func RecreateDnsCrd() error { + k8s_config, err := rest.InClusterConfig() + if err != nil { + return errors.New(fmt.Sprintf("Could not create in cluster k8s config: %v", err)) + } + _, err = kubernetes.NewForConfig(k8s_config) + if err != nil { + return errors.New(fmt.Sprintf("Could not create k8s client: %v", err)) + } + return nil +} + +var CRD_TEMPLATE = ` +apiVersion: externaldns.k8s.io/v1alpha1 +kind: DNSEndpoint +metadata: + name: {{ .Name }} + annotations: + external.dns/provider: cf +spec: + endpoints: + - dnsName: mail + recordTTL: 180 + recordType: A + targets: + - {{ .IP }} +` + +type CrdConfig struct { + Name string + IP string +} + +func generateCrd(name string, ip string) (string, error) { + config := CrdConfig{ + Name: name, + IP: ip, + } + tmpl, err := template.New("crd").Parse(CRD_TEMPLATE) + if err != nil { + return "", errors.New(fmt.Sprintf("Errors in crd template: %s", err.Error())) + } + var buf bytes.Buffer + err = tmpl.Execute(&buf, &config) + if err != nil { + return "", errors.New(fmt.Sprintf("Could not render crd template: %s", err.Error())) + } + return buf.String(), nil +} diff --git a/internal/utils/logging.go b/internal/utils/logging.go new file mode 100644 index 0000000..cc494fd --- /dev/null +++ b/internal/utils/logging.go @@ -0,0 +1,28 @@ +package utils + +import ( + "os" + + "git.uploadfilter24.eu/covidnetes/mail-dns-service/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) +}