//go:build !noserver package cmd import ( "errors" "fmt" "heckel.io/ntfy/user" "io/fs" "math" "net" "net/netip" "os" "os/signal" "strings" "syscall" "time" "heckel.io/ntfy/log" "github.com/urfave/cli/v2" "github.com/urfave/cli/v2/altsrc" "heckel.io/ntfy/server" "heckel.io/ntfy/util" ) func init() { commands = append(commands, cmdServe) } const ( defaultServerConfigFile = "/etc/ntfy/server.yml" ) var flagsServe = append( flagsDefault, &cli.StringFlag{Name: "config", Aliases: []string{"c"}, EnvVars: []string{"NTFY_CONFIG_FILE"}, Value: defaultServerConfigFile, DefaultText: defaultServerConfigFile, Usage: "config file"}, altsrc.NewStringFlag(&cli.StringFlag{Name: "base-url", Aliases: []string{"base_url", "B"}, EnvVars: []string{"NTFY_BASE_URL"}, Usage: "externally visible base URL for this host (e.g. https://ntfy.sh)"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "listen-http", Aliases: []string{"listen_http", "l"}, EnvVars: []string{"NTFY_LISTEN_HTTP"}, Value: server.DefaultListenHTTP, Usage: "ip:port used to as HTTP listen address"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "listen-https", Aliases: []string{"listen_https", "L"}, EnvVars: []string{"NTFY_LISTEN_HTTPS"}, Usage: "ip:port used to as HTTPS listen address"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "listen-unix", Aliases: []string{"listen_unix", "U"}, EnvVars: []string{"NTFY_LISTEN_UNIX"}, Usage: "listen on unix socket path"}), altsrc.NewIntFlag(&cli.IntFlag{Name: "listen-unix-mode", Aliases: []string{"listen_unix_mode"}, EnvVars: []string{"NTFY_LISTEN_UNIX_MODE"}, DefaultText: "system default", Usage: "file permissions of unix socket, e.g. 0700"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "key-file", Aliases: []string{"key_file", "K"}, EnvVars: []string{"NTFY_KEY_FILE"}, Usage: "private key file, if listen-https is set"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "cert-file", Aliases: []string{"cert_file", "E"}, EnvVars: []string{"NTFY_CERT_FILE"}, Usage: "certificate file, if listen-https is set"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "firebase-key-file", Aliases: []string{"firebase_key_file", "F"}, EnvVars: []string{"NTFY_FIREBASE_KEY_FILE"}, Usage: "Firebase credentials file; if set additionally publish to FCM topic"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "cache-file", Aliases: []string{"cache_file", "C"}, EnvVars: []string{"NTFY_CACHE_FILE"}, Usage: "cache file used for message caching"}), altsrc.NewDurationFlag(&cli.DurationFlag{Name: "cache-duration", Aliases: []string{"cache_duration", "b"}, EnvVars: []string{"NTFY_CACHE_DURATION"}, Value: server.DefaultCacheDuration, Usage: "buffer messages for this time to allow `since` requests"}), altsrc.NewIntFlag(&cli.IntFlag{Name: "cache-batch-size", Aliases: []string{"cache_batch_size"}, EnvVars: []string{"NTFY_BATCH_SIZE"}, Usage: "max size of messages to batch together when writing to message cache (if zero, writes are synchronous)"}), altsrc.NewDurationFlag(&cli.DurationFlag{Name: "cache-batch-timeout", Aliases: []string{"cache_batch_timeout"}, EnvVars: []string{"NTFY_CACHE_BATCH_TIMEOUT"}, Usage: "timeout for batched async writes to the message cache (if zero, writes are synchronous)"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "cache-startup-queries", Aliases: []string{"cache_startup_queries"}, EnvVars: []string{"NTFY_CACHE_STARTUP_QUERIES"}, Usage: "queries run when the cache database is initialized"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "auth-file", Aliases: []string{"auth_file", "H"}, EnvVars: []string{"NTFY_AUTH_FILE"}, Usage: "auth database file used for access control"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "auth-startup-queries", Aliases: []string{"auth_startup_queries"}, EnvVars: []string{"NTFY_AUTH_STARTUP_QUERIES"}, Usage: "queries run when the auth database is initialized"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "auth-default-access", Aliases: []string{"auth_default_access", "p"}, EnvVars: []string{"NTFY_AUTH_DEFAULT_ACCESS"}, Value: "read-write", Usage: "default permissions if no matching entries in the auth database are found"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "attachment-cache-dir", Aliases: []string{"attachment_cache_dir"}, EnvVars: []string{"NTFY_ATTACHMENT_CACHE_DIR"}, Usage: "cache directory for attached files"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "attachment-total-size-limit", Aliases: []string{"attachment_total_size_limit", "A"}, EnvVars: []string{"NTFY_ATTACHMENT_TOTAL_SIZE_LIMIT"}, DefaultText: "5G", Usage: "limit of the on-disk attachment cache"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "attachment-file-size-limit", Aliases: []string{"attachment_file_size_limit", "Y"}, EnvVars: []string{"NTFY_ATTACHMENT_FILE_SIZE_LIMIT"}, DefaultText: "15M", Usage: "per-file attachment size limit (e.g. 300k, 2M, 100M)"}), altsrc.NewDurationFlag(&cli.DurationFlag{Name: "attachment-expiry-duration", Aliases: []string{"attachment_expiry_duration", "X"}, EnvVars: []string{"NTFY_ATTACHMENT_EXPIRY_DURATION"}, Value: server.DefaultAttachmentExpiryDuration, DefaultText: "3h", Usage: "duration after which uploaded attachments will be deleted (e.g. 3h, 20h)"}), altsrc.NewDurationFlag(&cli.DurationFlag{Name: "keepalive-interval", Aliases: []string{"keepalive_interval", "k"}, EnvVars: []string{"NTFY_KEEPALIVE_INTERVAL"}, Value: server.DefaultKeepaliveInterval, Usage: "interval of keepalive messages"}), altsrc.NewDurationFlag(&cli.DurationFlag{Name: "manager-interval", Aliases: []string{"manager_interval", "m"}, EnvVars: []string{"NTFY_MANAGER_INTERVAL"}, Value: server.DefaultManagerInterval, Usage: "interval of for message pruning and stats printing"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "web-root", Aliases: []string{"web_root"}, EnvVars: []string{"NTFY_WEB_ROOT"}, Value: "app", Usage: "sets web root to landing page (home), web app (app) or disabled (disable)"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "upstream-base-url", Aliases: []string{"upstream_base_url"}, EnvVars: []string{"NTFY_UPSTREAM_BASE_URL"}, Value: "", Usage: "forward poll request to an upstream server, this is needed for iOS push notifications for self-hosted servers"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "smtp-sender-addr", Aliases: []string{"smtp_sender_addr"}, EnvVars: []string{"NTFY_SMTP_SENDER_ADDR"}, Usage: "SMTP server address (host:port) for outgoing emails"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "smtp-sender-user", Aliases: []string{"smtp_sender_user"}, EnvVars: []string{"NTFY_SMTP_SENDER_USER"}, Usage: "SMTP user (if e-mail sending is enabled)"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "smtp-sender-pass", Aliases: []string{"smtp_sender_pass"}, EnvVars: []string{"NTFY_SMTP_SENDER_PASS"}, Usage: "SMTP password (if e-mail sending is enabled)"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "smtp-sender-from", Aliases: []string{"smtp_sender_from"}, EnvVars: []string{"NTFY_SMTP_SENDER_FROM"}, Usage: "SMTP sender address (if e-mail sending is enabled)"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "smtp-server-listen", Aliases: []string{"smtp_server_listen"}, EnvVars: []string{"NTFY_SMTP_SERVER_LISTEN"}, Usage: "SMTP server address (ip:port) for incoming emails, e.g. :25"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "smtp-server-domain", Aliases: []string{"smtp_server_domain"}, EnvVars: []string{"NTFY_SMTP_SERVER_DOMAIN"}, Usage: "SMTP domain for incoming e-mail, e.g. ntfy.sh"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "smtp-server-addr-prefix", Aliases: []string{"smtp_server_addr_prefix"}, EnvVars: []string{"NTFY_SMTP_SERVER_ADDR_PREFIX"}, Usage: "SMTP email address prefix for topics to prevent spam (e.g. 'ntfy-')"}), altsrc.NewIntFlag(&cli.IntFlag{Name: "global-topic-limit", Aliases: []string{"global_topic_limit", "T"}, EnvVars: []string{"NTFY_GLOBAL_TOPIC_LIMIT"}, Value: server.DefaultTotalTopicLimit, Usage: "total number of topics allowed"}), altsrc.NewIntFlag(&cli.IntFlag{Name: "visitor-subscription-limit", Aliases: []string{"visitor_subscription_limit"}, EnvVars: []string{"NTFY_VISITOR_SUBSCRIPTION_LIMIT"}, Value: server.DefaultVisitorSubscriptionLimit, Usage: "number of subscriptions per visitor"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "visitor-attachment-total-size-limit", Aliases: []string{"visitor_attachment_total_size_limit"}, EnvVars: []string{"NTFY_VISITOR_ATTACHMENT_TOTAL_SIZE_LIMIT"}, Value: "100M", Usage: "total storage limit used for attachments per visitor"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "visitor-attachment-daily-bandwidth-limit", Aliases: []string{"visitor_attachment_daily_bandwidth_limit"}, EnvVars: []string{"NTFY_VISITOR_ATTACHMENT_DAILY_BANDWIDTH_LIMIT"}, Value: "500M", Usage: "total daily attachment download/upload bandwidth limit per visitor"}), altsrc.NewIntFlag(&cli.IntFlag{Name: "visitor-request-limit-burst", Aliases: []string{"visitor_request_limit_burst"}, EnvVars: []string{"NTFY_VISITOR_REQUEST_LIMIT_BURST"}, Value: server.DefaultVisitorRequestLimitBurst, Usage: "initial limit of requests per visitor"}), altsrc.NewDurationFlag(&cli.DurationFlag{Name: "visitor-request-limit-replenish", Aliases: []string{"visitor_request_limit_replenish"}, EnvVars: []string{"NTFY_VISITOR_REQUEST_LIMIT_REPLENISH"}, Value: server.DefaultVisitorRequestLimitReplenish, Usage: "interval at which burst limit is replenished (one per x)"}), altsrc.NewStringFlag(&cli.StringFlag{Name: "visitor-request-limit-exempt-hosts", Aliases: []string{"visitor_request_limit_exempt_hosts"}, EnvVars: []string{"NTFY_VISITOR_REQUEST_LIMIT_EXEMPT_HOSTS"}, Value: "", Usage: "hostnames and/or IP addresses of hosts that will be exempt from the visitor request limit"}), altsrc.NewIntFlag(&cli.IntFlag{Name: "visitor-email-limit-burst", Aliases: []string{"visitor_email_limit_burst"}, EnvVars: []string{"NTFY_VISITOR_EMAIL_LIMIT_BURST"}, Value: server.DefaultVisitorEmailLimitBurst, Usage: "initial limit of e-mails per visitor"}), altsrc.NewDurationFlag(&cli.DurationFlag{Name: "visitor-email-limit-replenish", Aliases: []string{"visitor_email_limit_replenish"}, EnvVars: []string{"NTFY_VISITOR_EMAIL_LIMIT_REPLENISH"}, Value: server.DefaultVisitorEmailLimitReplenish, Usage: "interval at which burst limit is replenished (one per x)"}), altsrc.NewBoolFlag(&cli.BoolFlag{Name: "behind-proxy", Aliases: []string{"behind_proxy", "P"}, EnvVars: []string{"NTFY_BEHIND_PROXY"}, Value: false, Usage: "if set, use X-Forwarded-For header to determine visitor IP address (for rate limiting)"}), altsrc.NewBoolFlag(&cli.BoolFlag{Name: "enable-signup", Aliases: []string{"enable_signup"}, EnvVars: []string{"NTFY_ENABLE_SIGNUP"}, Value: false, Usage: "xxx"}), altsrc.NewBoolFlag(&cli.BoolFlag{Name: "enable-login", Aliases: []string{"enable_login"}, EnvVars: []string{"NTFY_ENABLE_LOGIN"}, Value: false, Usage: "xxx"}), altsrc.NewBoolFlag(&cli.BoolFlag{Name: "enable-payments", Aliases: []string{"enable_payments"}, EnvVars: []string{"NTFY_ENABLE_PAYMENTS"}, Value: false, Usage: "xxx"}), altsrc.NewBoolFlag(&cli.BoolFlag{Name: "enable-reservations", Aliases: []string{"enable_reservations"}, EnvVars: []string{"NTFY_ENABLE_RESERVATIONS"}, Value: false, Usage: "xxx"}), ) var cmdServe = &cli.Command{ Name: "serve", Usage: "Run the ntfy server", UsageText: "ntfy serve [OPTIONS..]", Action: execServe, Category: categoryServer, Flags: flagsServe, Before: initConfigFileInputSourceFunc("config", flagsServe, initLogFunc), Description: `Run the ntfy server and listen for incoming requests The command will load the configuration from /etc/ntfy/server.yml. Config options can be overridden using the command line options. Examples: ntfy serve # Starts server in the foreground (on port 80) ntfy serve --listen-http :8080 # Starts server with alternate port`, } func execServe(c *cli.Context) error { if c.NArg() > 0 { return errors.New("no arguments expected, see 'ntfy serve --help' for help") } // Read all the options config := c.String("config") baseURL := c.String("base-url") listenHTTP := c.String("listen-http") listenHTTPS := c.String("listen-https") listenUnix := c.String("listen-unix") listenUnixMode := c.Int("listen-unix-mode") keyFile := c.String("key-file") certFile := c.String("cert-file") firebaseKeyFile := c.String("firebase-key-file") cacheFile := c.String("cache-file") cacheDuration := c.Duration("cache-duration") cacheStartupQueries := c.String("cache-startup-queries") cacheBatchSize := c.Int("cache-batch-size") cacheBatchTimeout := c.Duration("cache-batch-timeout") authFile := c.String("auth-file") authStartupQueries := c.String("auth-startup-queries") authDefaultAccess := c.String("auth-default-access") attachmentCacheDir := c.String("attachment-cache-dir") attachmentTotalSizeLimitStr := c.String("attachment-total-size-limit") attachmentFileSizeLimitStr := c.String("attachment-file-size-limit") attachmentExpiryDuration := c.Duration("attachment-expiry-duration") keepaliveInterval := c.Duration("keepalive-interval") managerInterval := c.Duration("manager-interval") webRoot := c.String("web-root") upstreamBaseURL := c.String("upstream-base-url") smtpSenderAddr := c.String("smtp-sender-addr") smtpSenderUser := c.String("smtp-sender-user") smtpSenderPass := c.String("smtp-sender-pass") smtpSenderFrom := c.String("smtp-sender-from") smtpServerListen := c.String("smtp-server-listen") smtpServerDomain := c.String("smtp-server-domain") smtpServerAddrPrefix := c.String("smtp-server-addr-prefix") totalTopicLimit := c.Int("global-topic-limit") visitorSubscriptionLimit := c.Int("visitor-subscription-limit") visitorAttachmentTotalSizeLimitStr := c.String("visitor-attachment-total-size-limit") visitorAttachmentDailyBandwidthLimitStr := c.String("visitor-attachment-daily-bandwidth-limit") visitorRequestLimitBurst := c.Int("visitor-request-limit-burst") visitorRequestLimitReplenish := c.Duration("visitor-request-limit-replenish") visitorRequestLimitExemptHosts := util.SplitNoEmpty(c.String("visitor-request-limit-exempt-hosts"), ",") visitorEmailLimitBurst := c.Int("visitor-email-limit-burst") visitorEmailLimitReplenish := c.Duration("visitor-email-limit-replenish") behindProxy := c.Bool("behind-proxy") enableSignup := c.Bool("enable-signup") enableLogin := c.Bool("enable-login") enablePayments := c.Bool("enable-payments") enableReservations := c.Bool("enable-reservations") // Check values if firebaseKeyFile != "" && !util.FileExists(firebaseKeyFile) { return errors.New("if set, FCM key file must exist") } else if keepaliveInterval < 5*time.Second { return errors.New("keepalive interval cannot be lower than five seconds") } else if managerInterval < 5*time.Second { return errors.New("manager interval cannot be lower than five seconds") } else if cacheDuration > 0 && cacheDuration < managerInterval { return errors.New("cache duration cannot be lower than manager interval") } else if keyFile != "" && !util.FileExists(keyFile) { return errors.New("if set, key file must exist") } else if certFile != "" && !util.FileExists(certFile) { return errors.New("if set, certificate file must exist") } else if listenHTTPS != "" && (keyFile == "" || certFile == "") { return errors.New("if listen-https is set, both key-file and cert-file must be set") } else if smtpSenderAddr != "" && (baseURL == "" || smtpSenderUser == "" || smtpSenderPass == "" || smtpSenderFrom == "") { return errors.New("if smtp-sender-addr is set, base-url, smtp-sender-user, smtp-sender-pass and smtp-sender-from must also be set") } else if smtpServerListen != "" && smtpServerDomain == "" { return errors.New("if smtp-server-listen is set, smtp-server-domain must also be set") } else if attachmentCacheDir != "" && baseURL == "" { return errors.New("if attachment-cache-dir is set, base-url must also be set") } else if baseURL != "" && !strings.HasPrefix(baseURL, "http://") && !strings.HasPrefix(baseURL, "https://") { return errors.New("if set, base-url must start with http:// or https://") } else if baseURL != "" && strings.HasSuffix(baseURL, "/") { return errors.New("if set, base-url must not end with a slash (/)") } else if !util.Contains([]string{"app", "home", "disable"}, webRoot) { return errors.New("if set, web-root must be 'home' or 'app'") } else if upstreamBaseURL != "" && !strings.HasPrefix(upstreamBaseURL, "http://") && !strings.HasPrefix(upstreamBaseURL, "https://") { return errors.New("if set, upstream-base-url must start with http:// or https://") } else if upstreamBaseURL != "" && strings.HasSuffix(upstreamBaseURL, "/") { return errors.New("if set, upstream-base-url must not end with a slash (/)") } else if upstreamBaseURL != "" && baseURL == "" { return errors.New("if upstream-base-url is set, base-url must also be set") } else if upstreamBaseURL != "" && baseURL != "" && baseURL == upstreamBaseURL { return errors.New("base-url and upstream-base-url cannot be identical, you'll likely want to set upstream-base-url to https://ntfy.sh, see https://ntfy.sh/docs/config/#ios-instant-notifications") } else if authFile == "" && (enableSignup || enableLogin || enableReservations || enablePayments) { return errors.New("cannot set enable-signup, enable-login, enable-reserve-topics, or enable-payments if auth-file is not set") } webRootIsApp := webRoot == "app" enableWeb := webRoot != "disable" // Default auth permissions authDefault, err := user.ParsePermission(authDefaultAccess) if err != nil { return errors.New("if set, auth-default-access must start set to 'read-write', 'read-only', 'write-only' or 'deny-all'") } // Special case: Unset default if listenHTTP == "-" { listenHTTP = "" } // Convert sizes to bytes attachmentTotalSizeLimit, err := parseSize(attachmentTotalSizeLimitStr, server.DefaultAttachmentTotalSizeLimit) if err != nil { return err } attachmentFileSizeLimit, err := parseSize(attachmentFileSizeLimitStr, server.DefaultAttachmentFileSizeLimit) if err != nil { return err } visitorAttachmentTotalSizeLimit, err := parseSize(visitorAttachmentTotalSizeLimitStr, server.DefaultVisitorAttachmentTotalSizeLimit) if err != nil { return err } visitorAttachmentDailyBandwidthLimit, err := parseSize(visitorAttachmentDailyBandwidthLimitStr, server.DefaultVisitorAttachmentDailyBandwidthLimit) if err != nil { return err } else if visitorAttachmentDailyBandwidthLimit > math.MaxInt { return fmt.Errorf("config option visitor-attachment-daily-bandwidth-limit must be lower than %d", math.MaxInt) } // Resolve hosts visitorRequestLimitExemptIPs := make([]netip.Prefix, 0) for _, host := range visitorRequestLimitExemptHosts { ips, err := parseIPHostPrefix(host) if err != nil { log.Warn("cannot resolve host %s: %s, ignoring visitor request exemption", host, err.Error()) continue } visitorRequestLimitExemptIPs = append(visitorRequestLimitExemptIPs, ips...) } // Run server conf := server.NewConfig() conf.BaseURL = baseURL conf.ListenHTTP = listenHTTP conf.ListenHTTPS = listenHTTPS conf.ListenUnix = listenUnix conf.ListenUnixMode = fs.FileMode(listenUnixMode) conf.KeyFile = keyFile conf.CertFile = certFile conf.FirebaseKeyFile = firebaseKeyFile conf.CacheFile = cacheFile conf.CacheDuration = cacheDuration conf.CacheStartupQueries = cacheStartupQueries conf.CacheBatchSize = cacheBatchSize conf.CacheBatchTimeout = cacheBatchTimeout conf.AuthFile = authFile conf.AuthStartupQueries = authStartupQueries conf.AuthDefault = authDefault conf.AttachmentCacheDir = attachmentCacheDir conf.AttachmentTotalSizeLimit = attachmentTotalSizeLimit conf.AttachmentFileSizeLimit = attachmentFileSizeLimit conf.AttachmentExpiryDuration = attachmentExpiryDuration conf.KeepaliveInterval = keepaliveInterval conf.ManagerInterval = managerInterval conf.WebRootIsApp = webRootIsApp conf.UpstreamBaseURL = upstreamBaseURL conf.SMTPSenderAddr = smtpSenderAddr conf.SMTPSenderUser = smtpSenderUser conf.SMTPSenderPass = smtpSenderPass conf.SMTPSenderFrom = smtpSenderFrom conf.SMTPServerListen = smtpServerListen conf.SMTPServerDomain = smtpServerDomain conf.SMTPServerAddrPrefix = smtpServerAddrPrefix conf.TotalTopicLimit = totalTopicLimit conf.VisitorSubscriptionLimit = visitorSubscriptionLimit conf.VisitorAttachmentTotalSizeLimit = visitorAttachmentTotalSizeLimit conf.VisitorAttachmentDailyBandwidthLimit = int(visitorAttachmentDailyBandwidthLimit) conf.VisitorRequestLimitBurst = visitorRequestLimitBurst conf.VisitorRequestLimitReplenish = visitorRequestLimitReplenish conf.VisitorRequestExemptIPAddrs = visitorRequestLimitExemptIPs conf.VisitorEmailLimitBurst = visitorEmailLimitBurst conf.VisitorEmailLimitReplenish = visitorEmailLimitReplenish conf.BehindProxy = behindProxy conf.EnableWeb = enableWeb conf.EnableSignup = enableSignup conf.EnableLogin = enableLogin conf.EnablePayments = enablePayments conf.EnableReservations = enableReservations conf.Version = c.App.Version // Set up hot-reloading of config go sigHandlerConfigReload(config) // Run server s, err := server.New(conf) if err != nil { log.Fatal(err) } else if err := s.Run(); err != nil { log.Fatal(err) } log.Info("Exiting.") return nil } func parseSize(s string, defaultValue int64) (v int64, err error) { if s == "" { return defaultValue, nil } v, err = util.ParseSize(s) if err != nil { return 0, err } return v, nil } func sigHandlerConfigReload(config string) { sigs := make(chan os.Signal, 1) signal.Notify(sigs, syscall.SIGHUP) for range sigs { log.Info("Partially hot reloading configuration ...") inputSource, err := newYamlSourceFromFile(config, flagsServe) if err != nil { log.Warn("Hot reload failed: %s", err.Error()) continue } reloadLogLevel(inputSource) } } func parseIPHostPrefix(host string) (prefixes []netip.Prefix, err error) { // Try parsing as prefix, e.g. 10.0.1.0/24 prefix, err := netip.ParsePrefix(host) if err == nil { prefixes = append(prefixes, prefix.Masked()) return prefixes, nil } // Not a prefix, parse as host or IP (LookupHost passes through an IP as is) ips, err := net.LookupHost(host) if err != nil { return nil, err } for _, ipStr := range ips { ip, err := netip.ParseAddr(ipStr) if err == nil { prefix, err := ip.Prefix(ip.BitLen()) if err != nil { return nil, fmt.Errorf("%s successfully parsed but unable to make prefix: %s", ip.String(), err.Error()) } prefixes = append(prefixes, prefix.Masked()) } } return } func reloadLogLevel(inputSource altsrc.InputSourceContext) { newLevelStr, err := inputSource.String("log-level") if err != nil { log.Warn("Cannot load log level: %s", err.Error()) return } newLevel := log.ToLevel(newLevelStr) log.SetLevel(newLevel) log.Info("Log level is %s", newLevel.String()) }