Add Rabbit/Postgres worker with health endpoint

go.mod

@@ -1,3 +1,17 @@
 module gitea-naeel.giteak8s.services.ngcloud.ru/naeel/rabbit-worker
 
 go 1.22
+
+require (
+	github.com/jackc/pgx/v5 v5.5.5
+	github.com/rabbitmq/amqp091-go v1.10.0
+)
+
+require (
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect
+	github.com/jackc/puddle/v2 v2.2.1 // indirect
+	golang.org/x/crypto v0.17.0 // indirect
+	golang.org/x/sync v0.1.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+)

go.sum

@@ -0,0 +1,32 @@
+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/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
+github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
+github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a h1:bbPeKD0xmW/Y25WS6cokEszi5g+S0QxI/d45PkRi7Nk=
+github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a/go.mod h1:5TJZWKEWniPve33vlWYSoGYefn3gLQRzjfDlhSJ9ZKM=
+github.com/jackc/pgx/v5 v5.5.5 h1:amBjrZVmksIdNjxGW/IiIMzxMKZFelXbUoPNb+8sjQw=
+github.com/jackc/pgx/v5 v5.5.5/go.mod h1:ez9gk+OAat140fv9ErkZDYFWmXLfV+++K0uAOiwgm1A=
+github.com/jackc/puddle/v2 v2.2.1 h1:RhxXJtFG022u4ibrCSMSiu5aOq1i77R3OHKNJj77OAk=
+github.com/jackc/puddle/v2 v2.2.1/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
+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/rabbitmq/amqp091-go v1.10.0 h1:STpn5XsHlHGcecLmMFCtg7mqq0RnD+zFr4uzukfVhBw=
+github.com/rabbitmq/amqp091-go v1.10.0/go.mod h1:Hy4jKW5kQART1u+JkDTF9YYOQUHXqMuhrgxOEeS7G4o=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
+github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
+go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
+golang.org/x/crypto v0.17.0 h1:r8bRNjWL3GshPW3gkd+RpvzWrZAwPS49OmTGZ/uhM4k=
+golang.org/x/crypto v0.17.0/go.mod h1:gCAAfMLgwOJRpTjQ2zCCt2OcSfYMTeZVSRtQlPC7Nq4=
+golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+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=

main.go

@@ -1,14 +1,62 @@
 package main
 
 import (
+	"context"
+	"encoding/json"
+	"errors"
 	"fmt"
 	"log"
 	"net/http"
 	"os"
+	"os/signal"
+	"strconv"
+	"strings"
+	"sync"
+	"syscall"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+	amqp "github.com/rabbitmq/amqp091-go"
 )
 
-// Минимальный воркер для проверки, что nubes_http умеет запускать контейнеры.
+// Воркер держит HTTP /healthz и параллельно слушает RabbitMQ,
-// Никакой логики с Rabbit или Postgres нет — только HTTP health endpoint.
+// записывая события в Postgres. Даже при ошибках контейнер остается живым.
+
+type Message struct {
+	Action    string `json:"action"`
+	ID        *int64 `json:"id,omitempty"`
+	Text      string `json:"text,omitempty"`
+	Source    string `json:"source,omitempty"`
+	RequestID string `json:"request_id,omitempty"`
+}
+
+type workerStatus struct {
+	mu          sync.Mutex
+	state       string
+	lastError   string
+	lastSuccess time.Time
+}
+
+func (s *workerStatus) set(state, err string) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.state = state
+	s.lastError = err
+	if err == "" {
+		s.lastSuccess = time.Now()
+	}
+}
+
+func (s *workerStatus) snapshot() map[string]string {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	result := map[string]string{
+		"state":     s.state,
+		"error":     s.lastError,
+		"timestamp": s.lastSuccess.Format(time.RFC3339),
+	}
+	return result
+}
 
 func getenv(key, def string) string {
 	val := os.Getenv(key)
@@ -18,12 +66,130 @@ func getenv(key, def string) string {
 	return val
 }
 
-func main() {
+func getenvInt(key string, def int) int {
-	port := getenv("PORT", "8080")
+	val := os.Getenv(key)
+	if val == "" {
+		return def
+	}
+	parsed, err := strconv.Atoi(val)
+	if err != nil {
+		return def
+	}
+	return parsed
+}
 
+func buildAMQPURL() (string, error) {
+	if url := os.Getenv("AMQP_URL"); url != "" {
+		return url, nil
+	}
+
+	host := getenv("RABBIT_HOST", "")
+	port := getenv("RABBIT_PORT", "5672")
+	user := getenv("RABBIT_USER", "")
+	pass := getenv("RABBIT_PASSWORD", "")
+	vhost := getenv("RABBIT_VHOST", "/")
+
+	if host == "" || user == "" || pass == "" {
+		return "", errors.New("missing RABBIT_HOST/RABBIT_USER/RABBIT_PASSWORD or AMQP_URL")
+	}
+
+	return fmt.Sprintf("amqp://%s:%s@%s:%s%s", user, pass, host, port, vhost), nil
+}
+
+func buildPgConnString() (string, error) {
+	if url := os.Getenv("DATABASE_URL"); url != "" {
+		return url, nil
+	}
+
+	host := getenv("PGHOST", "")
+	if host == "" {
+		return "", errors.New("missing PGHOST or DATABASE_URL")
+	}
+	port := getenv("PGPORT", "5432")
+	user := getenv("PGUSER", "")
+	pass := getenv("PGPASSWORD", "")
+	db := getenv("PGDATABASE", "postgres")
+	ssl := getenv("PGSSLMODE", "require")
+
+	if user == "" || pass == "" {
+		return "", errors.New("missing PGUSER/PGPASSWORD or DATABASE_URL")
+	}
+
+	return fmt.Sprintf(
+		"postgresql://%s:%s@%s:%s/%s?sslmode=%s",
+		user,
+		pass,
+		host,
+		port,
+		db,
+		ssl,
+	), nil
+}
+
+func ensureTable(ctx context.Context, pool *pgxpool.Pool, table string) error {
+	query := fmt.Sprintf(
+		"CREATE TABLE IF NOT EXISTS %s (id SERIAL PRIMARY KEY, test_data TEXT, created_at TIMESTAMP DEFAULT NOW())",
+		table,
+	)
+	_, err := pool.Exec(ctx, query)
+	return err
+}
+
+func parseMessage(body []byte) Message {
+	msg := Message{Action: "create"}
+	if err := json.Unmarshal(body, &msg); err != nil {
+		msg.Text = strings.TrimSpace(string(body))
+		if msg.Text == "" {
+			msg.Text = "(empty)"
+		}
+		return msg
+	}
+	if msg.Action == "" {
+		msg.Action = "create"
+	}
+	return msg
+}
+
+var errInvalidMessage = errors.New("invalid message")
+
+func handleMessage(ctx context.Context, pool *pgxpool.Pool, table string, msg Message) error {
+	ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
+
+	switch strings.ToLower(msg.Action) {
+	case "create":
+		text := msg.Text
+		if text == "" {
+			text = "(empty)"
+		}
+		query := fmt.Sprintf("INSERT INTO %s (test_data) VALUES ($1)", table)
+		_, err := pool.Exec(ctx, query, text)
+		return err
+	case "update":
+		if msg.ID == nil {
+			return errInvalidMessage
+		}
+		query := fmt.Sprintf("UPDATE %s SET test_data=$1 WHERE id=$2", table)
+		_, err := pool.Exec(ctx, query, msg.Text, *msg.ID)
+		return err
+	case "delete":
+		if msg.ID == nil {
+			return errInvalidMessage
+		}
+		query := fmt.Sprintf("DELETE FROM %s WHERE id=$1", table)
+		_, err := pool.Exec(ctx, query, *msg.ID)
+		return err
+	default:
+		return errInvalidMessage
+	}
+}
+
+func startHTTPServer(port string, status *workerStatus) {
 	http.HandleFunc("/healthz", func(w http.ResponseWriter, _ *http.Request) {
+		payload, _ := json.Marshal(status.snapshot())
+		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusOK)
-		_, _ = w.Write([]byte("ok"))
+		_, _ = w.Write(payload)
 	})
 
 	http.HandleFunc("/", func(w http.ResponseWriter, _ *http.Request) {
@@ -36,3 +202,128 @@ func main() {
 		log.Fatal(err)
 	}
 }
+
+func runWorker(ctx context.Context, status *workerStatus) error {
+	amqpURL, err := buildAMQPURL()
+	if err != nil {
+		return err
+	}
+
+	pgConn, err := buildPgConnString()
+	if err != nil {
+		return err
+	}
+
+	queues := strings.Split(getenv("RABBIT_QUEUES", "crud_queue"), ",")
+	for i := range queues {
+		queues[i] = strings.TrimSpace(queues[i])
+	}
+	queueDurable := getenv("RABBIT_DURABLE", "true") == "true"
+	prefetch := getenvInt("RABBIT_PREFETCH", 1)
+	requeueOnError := getenv("REQUEUE_ON_ERROR", "true") == "true"
+	table := getenv("PG_TABLE", "nubes_test_table")
+
+	pool, err := pgxpool.New(ctx, pgConn)
+	if err != nil {
+		return fmt.Errorf("pg pool: %w", err)
+	}
+	defer pool.Close()
+
+	if err := pool.Ping(ctx); err != nil {
+		return fmt.Errorf("pg ping: %w", err)
+	}
+	if err := ensureTable(ctx, pool, table); err != nil {
+		return fmt.Errorf("ensure table: %w", err)
+	}
+
+	conn, err := amqp.Dial(amqpURL)
+	if err != nil {
+		return fmt.Errorf("amqp dial: %w", err)
+	}
+	defer conn.Close()
+
+	ch, err := conn.Channel()
+	if err != nil {
+		return fmt.Errorf("amqp channel: %w", err)
+	}
+	defer ch.Close()
+
+	if err := ch.Qos(prefetch, 0, false); err != nil {
+		return fmt.Errorf("amqp qos: %w", err)
+	}
+
+	for _, q := range queues {
+		if q == "" {
+			continue
+		}
+		if _, err := ch.QueueDeclare(q, queueDurable, false, false, false, nil); err != nil {
+			return fmt.Errorf("queue declare %s: %w", q, err)
+		}
+	}
+
+	msgs := make(chan amqp.Delivery)
+	for _, q := range queues {
+		if q == "" {
+			continue
+		}
+		delivery, err := ch.Consume(q, "", false, false, false, false, nil)
+		if err != nil {
+			return fmt.Errorf("consume %s: %w", q, err)
+		}
+
+		go func(d <-chan amqp.Delivery) {
+			for m := range d {
+				msgs <- m
+			}
+		}(delivery)
+	}
+
+	status.set("running", "")
+	for {
+		select {
+		case <-ctx.Done():
+			return nil
+		case m := <-msgs:
+			msg := parseMessage(m.Body)
+			if err := handleMessage(ctx, pool, table, msg); err != nil {
+				if errors.Is(err, errInvalidMessage) {
+					_ = m.Nack(false, false)
+					log.Printf("reject message: %v", err)
+					continue
+				}
+				_ = m.Nack(false, requeueOnError)
+				log.Printf("error handling message: %v", err)
+				continue
+			}
+			_ = m.Ack(false)
+		}
+	}
+}
+
+func main() {
+	port := getenv("PORT", "8080")
+	status := &workerStatus{state: "starting"}
+
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
+	go startHTTPServer(port, status)
+
+	backoff := 2 * time.Second
+	for {
+		if ctx.Err() != nil {
+			return
+		}
+		if err := runWorker(ctx, status); err != nil {
+			status.set("degraded", err.Error())
+			log.Printf("worker error: %v", err)
+			time.Sleep(backoff)
+			if backoff < 30*time.Second {
+				backoff *= 2
+			}
+			continue
+		}
+		status.set("stopped", "")
+		return
+	}
+}