From e5a70b9e9148e2e4e25d3c8168027dfaf584086a Mon Sep 17 00:00:00 2001 From: Iru Sensei Date: Sun, 23 Nov 2025 20:41:00 +0100 Subject: [PATCH] initial --- README.md | 15 +++++ config.go | 15 +++-- go.mod | 25 +++++++ go.sum | 144 +++++++++++++++++++++++++++++++++++++++++ main.go | 9 +-- nostr.go | 46 +++++++++++++ parser.go | 20 ++++++ server.go | 31 +++++++++ parser.dis => types.go | 24 +------ 9 files changed, 298 insertions(+), 31 deletions(-) create mode 100644 README.md create mode 100644 go.mod create mode 100644 go.sum create mode 100644 nostr.go create mode 100644 parser.go create mode 100644 server.go rename parser.dis => types.go (76%) diff --git a/README.md b/README.md new file mode 100644 index 0000000..cafa838 --- /dev/null +++ b/README.md @@ -0,0 +1,15 @@ +# alertmanager-nostr-bridge + +Setup a webhook to forward Grafana alerts to Nostr + +``` +Usage of ./alertmanager-nostr-bridge: + -npub string + Bech32-encoded npub of the account who will receive notifications. Can be set through NOSTR_NPUB env. You can also set a by alert target by setting the "npub" label on the alert properties. + -nsec string + Path to file containing bech32-encoded nsec. Can be set through NOSTR_NSEC_FILE env or generated on first run + -port int + HTTP listen port. Defaults to 49160/TCP. Can be set through WEBHOOK_PORT env (default 49160) + -relays string + Comma separated list of relays you want to send your notifications to. Can be set through NOSTR_RELAYS env. +``` diff --git a/config.go b/config.go index fbec92f..a49fcae 100644 --- a/config.go +++ b/config.go @@ -13,10 +13,11 @@ import ( ) type Config struct { - Port int - NSec string - NPub string - Relays []string + Port int + NSec string + SecretKey nostr.SecretKey + NPub string + Relays []string } func check(e error) { @@ -66,11 +67,12 @@ func LoadConfig() *Config { if prefix != "nsec" { log.Fatalf("not an nsec, got %s", prefix) } - + pk := nostr.GetPublicKey(sk) npub := nip19.EncodeNpub(pk) log.Printf("Loading private key from file %s. Will send alerts from %s", nsecfile, npub) config.NSec = nsec + config.SecretKey = sk } else { sk := nostr.Generate() pk := nostr.GetPublicKey(sk) @@ -78,6 +80,7 @@ func LoadConfig() *Config { npub := nip19.EncodeNpub(pk) log.Printf("Using random private key. Will send alerts from %s", npub) config.NSec = nsec + config.SecretKey = sk } npub, ok := os.LookupEnv("NOSTR_NPUB") @@ -90,6 +93,8 @@ func LoadConfig() *Config { relays, ok := os.LookupEnv("NOSTR_RELAYS") if ok { config.Relays = strings.Split(relays, ",") + } else { + config.Relays = strings.Split(relayargs, ",") } return &config } diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..b537dfe --- /dev/null +++ b/go.mod @@ -0,0 +1,25 @@ +module alertmanager-nostr-bridge + +go 1.25.3 + +require fiatjaf.com/nostr v0.0.0-20251121024851-a62ddd1326b1 + +require ( + github.com/ImVexed/fasturl v0.0.0-20230304231329-4e41488060f3 // indirect + github.com/btcsuite/btcd/btcec/v2 v2.3.4 // indirect + github.com/btcsuite/btcd/btcutil v1.1.5 // indirect + github.com/btcsuite/btcd/chaincfg/chainhash v1.1.0 // indirect + github.com/coder/websocket v1.8.13 // indirect + github.com/decred/dcrd/crypto/blake256 v1.1.0 // indirect + github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.0 // indirect + github.com/josharian/intern v1.0.0 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/mailru/easyjson v0.9.0 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/puzpuzpuz/xsync/v3 v3.5.1 // indirect + github.com/tidwall/gjson v1.18.0 // indirect + github.com/tidwall/match v1.1.1 // indirect + github.com/tidwall/pretty v1.2.1 // indirect + golang.org/x/exp v0.0.0-20250305212735-054e65f0b394 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..5dcd776 --- /dev/null +++ b/go.sum @@ -0,0 +1,144 @@ +fiatjaf.com/nostr v0.0.0-20251121024851-a62ddd1326b1 h1:wQ9i1OQxcW3cmV+5BN/kDgiV1LzngsOSNt+U9pDbudg= +fiatjaf.com/nostr v0.0.0-20251121024851-a62ddd1326b1/go.mod h1:pCbBk3hfs5x0+ND8k25mq9e50LEmQpAYMdTUe1M1Rt0= +github.com/ImVexed/fasturl v0.0.0-20230304231329-4e41488060f3 h1:ClzzXMDDuUbWfNNZqGeYq4PnYOlwlOVIvSyNaIy0ykg= 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+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/main.go b/main.go index 8d683c8..6bc7d1a 100644 --- a/main.go +++ b/main.go @@ -2,12 +2,13 @@ package main import ( "log" + "fmt" + "net/http" ) func main() { cfg := LoadConfig() - log.Printf("Port: %s", cfg.Port) - log.Printf("Nsec: %s", cfg.NSec) - log.Printf("Npub: %s", cfg.NPub) - log.Printf("Relays: %s", cfg.Relays) + http.HandleFunc("/", cfg.alertReceiver) + log.Printf("Server starting on http://localhost:%d", cfg.Port) + log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", cfg.Port), nil)) } diff --git a/nostr.go b/nostr.go new file mode 100644 index 0000000..ae89f6b --- /dev/null +++ b/nostr.go @@ -0,0 +1,46 @@ +package main + +import ( + "context" + "fiatjaf.com/nostr" + "log" + "time" +) + +func sendAlerts(config *Config, alert string) error { + + pool := nostr.NewPool(nostr.PoolOptions{ + PenaltyBox: true, + }) + for _, relayurl := range config.Relays { + if !nostr.IsValidRelayURL(relayurl) { + log.Fatalf("%s is not a valid relay URL.") + } + relay, err := pool.EnsureRelay(relayurl) + check(err) + log.Printf("Connected to relay: %s", relay.URL) + } + event := &nostr.Event{ + CreatedAt: nostr.Now(), + Kind: nostr.KindTextNote, + Tags: nostr.Tags{}, + Content: alert, + } + + event.Sign(config.SecretKey) + ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second) + defer cancel() + results := pool.PublishMany(ctx, config.Relays, *event) + + successCount := 0 + for result := range results { + if result.Error != nil { + log.Printf("Failed on %s: %v\n", result.RelayURL, result.Error) + } else { + log.Printf("Succeeded on %s\n", result.RelayURL) + successCount++ + } + } + + return nil +} diff --git a/parser.go b/parser.go new file mode 100644 index 0000000..555366f --- /dev/null +++ b/parser.go @@ -0,0 +1,20 @@ +package main + +import ( + "strings" + "encoding/json" +) + +func ParseAlert(payload []byte) (string) { + var data Payload + p1 := json.Unmarshal(payload, &data) + check(p1) + + var o strings.Builder + + o.WriteString(data.Title) + o.WriteString("status: " + data.Status) + o.WriteString("state: " + data.State) + o.WriteString(data.Message) + return o.String() +} diff --git a/server.go b/server.go new file mode 100644 index 0000000..4fb81a4 --- /dev/null +++ b/server.go @@ -0,0 +1,31 @@ +package main + +import ( + "io" + "net/http" +) + + +func (cfg *Config) alertReceiver(w http.ResponseWriter, r *http.Request) { + if r.Method != http.MethodPost { + http.Error(w, "Method not allowed", http.StatusMethodNotAllowed) + return + } + + body, err := io.ReadAll(io.LimitReader(r.Body, 1<<20)) + if err != nil { + http.Error(w, "Payload exceeded maximum size. Are you really sending alerts?", http.StatusBadRequest) + return + } + defer r.Body.Close() + + if len(body) == 0 { + http.Error(w, "Empty payload", http.StatusBadRequest) + return + } + + payload := ParseAlert(body) + publish := sendAlerts(cfg, payload) + check(publish) + +} diff --git a/parser.dis b/types.go similarity index 76% rename from parser.dis rename to types.go index a32545c..80fd10a 100644 --- a/parser.dis +++ b/types.go @@ -1,10 +1,5 @@ package main -import ( - "encoding/json" - "fmt" - "os" -) type Alert struct { Status string `json:"status"` @@ -26,30 +21,15 @@ type Payload struct { Receiver string `json:"receiver"` Status string `json:"firing"` ExternalURL string `json:"externalURL"` - Version string `json:"version"` + Version string `json:"version"` GroupKey string `json:"groupKey"` TruncatedAlerts int `json:"truncatedAlerts"` OrgID int `json:"orgId"` Title string `json:"title"` State string `json"state"` Message string `json:"message"` - Alerts []Alert `json:"alerts"` + Alerts []Alert `json:"alerts"` GroupLabels map[string]any `json:"groupLabels"` CommonLabels map[string]any `json:"groupLabels"` CommonAnnotations map[string]any `json:"commonAnnotations"` } - -func check(e error) { - if e != nil { - panic(e) - } -} - -func main() { - data, err := os.ReadFile("./alert.json") - check(err) - var payload Payload - p1 := json.Unmarshal([]byte(data), &payload) - check(p1) - fmt.Printf("Full payload: %+v\n", payload) -}