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112 lines
3.1 KiB
112 lines
3.1 KiB
// tera-alarmd is the bounded alarm delivery and retry service.
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package main
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import (
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"errors"
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"log"
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"net"
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"os"
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"os/signal"
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"path/filepath"
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"strconv"
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"syscall"
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"tera-clone/services/tera-api/internal/alarmdelivery"
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"tera-clone/services/tera-api/internal/alarmdelivery/alarmsocket"
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"tera-clone/services/tera-api/internal/secretstore"
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)
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func main() {
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secretPath := getenv("TERA_ALARMD_SECRET_STORE", "/var/lib/tera-api/secrets.json")
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_, err := secretstore.Open(secretPath)
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if err != nil {
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log.Fatalf("tera-alarmd secret store setup failed: %v", err)
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}
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secrets := secretstore.FileReader{Path: secretPath}
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dispatcher, err := alarmdelivery.NewDispatcher(map[string]alarmdelivery.Transport{
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alarmdelivery.ChannelWeb: alarmdelivery.WebTransport{},
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alarmdelivery.ChannelSyslog: alarmdelivery.SyslogTransport{},
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alarmdelivery.ChannelEmail: alarmdelivery.EmailTransport{Secrets: secrets},
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alarmdelivery.ChannelSNMPTrap: alarmdelivery.SNMPTrapTransport{Secrets: secrets},
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}, alarmdelivery.DispatcherOptions{
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StatePath: getenv("TERA_ALARMD_STATE", "/var/lib/tera-alarmd/deliveries.json"),
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MaxJobs: getenvInt("TERA_ALARMD_MAX_JOBS", 256),
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})
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if err != nil {
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log.Fatalf("tera-alarmd dispatcher setup failed: %v", err)
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}
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defer dispatcher.Close()
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socketPath := getenv("TERA_ALARMD_SOCKET", alarmsocket.DefaultSocketPath)
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listener, err := listen(socketPath)
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if err != nil {
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log.Fatalf("tera-alarmd socket setup failed: %v", err)
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}
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defer func() {
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_ = listener.Close()
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_ = os.Remove(socketPath)
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}()
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server := alarmsocket.Server{Controller: dispatcher}
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done := make(chan error, 1)
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go func() { done <- server.Serve(listener) }()
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log.Printf("tera-alarmd serving delivery control on %s", socketPath)
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signals := make(chan os.Signal, 1)
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signal.Notify(signals, syscall.SIGINT, syscall.SIGTERM)
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select {
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case signal := <-signals:
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log.Printf("tera-alarmd stopping after %s", signal)
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_ = listener.Close()
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if err := <-done; err != nil {
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log.Printf("tera-alarmd stop error: %v", err)
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}
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case err := <-done:
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if err != nil {
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log.Fatalf("tera-alarmd failed: %v", err)
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}
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}
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}
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func listen(socketPath string) (net.Listener, error) {
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if socketPath == "" || !filepath.IsAbs(socketPath) {
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return nil, errors.New("TERA_ALARMD_SOCKET must be an absolute path")
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}
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if err := os.MkdirAll(filepath.Dir(socketPath), 0o750); err != nil {
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return nil, err
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}
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if info, err := os.Lstat(socketPath); err == nil {
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if info.Mode()&os.ModeSocket == 0 {
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return nil, errors.New("refusing to replace non-socket alarm delivery path")
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}
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if err := os.Remove(socketPath); err != nil {
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return nil, err
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}
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} else if !os.IsNotExist(err) {
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return nil, err
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}
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listener, err := net.Listen("unix", socketPath)
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if err != nil {
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return nil, err
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}
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if err := os.Chmod(socketPath, 0o660); err != nil {
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_ = listener.Close()
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return nil, err
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}
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return listener, nil
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}
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func getenv(key, fallback string) string {
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if value := os.Getenv(key); value != "" {
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return value
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}
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return fallback
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}
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func getenvInt(key string, fallback int) int {
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value, err := strconv.Atoi(os.Getenv(key))
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if err != nil || value <= 0 {
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return fallback
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}
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return value
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}
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