package notifier import ( "bytes" "fmt" "io/ioutil" "net/http" "strings" ) // AlertManager represents integration provider with Prometheus alert manager // https://github.com/prometheus/alertmanager type AlertManager struct { alertURL string argFunc AlertURLGenerator client *http.Client } // Send an alert or resolve message func (am *AlertManager) Send(alerts []Alert) error { b := &bytes.Buffer{} writeamRequest(b, alerts, am.argFunc) resp, err := am.client.Post(am.alertURL, "application/json", b) if err != nil { return err } defer func() { _ = resp.Body.Close() }() if resp.StatusCode != http.StatusOK { body, err := ioutil.ReadAll(resp.Body) if err != nil { return fmt.Errorf("failed to read response from %q: %s", am.alertURL, err) } return fmt.Errorf("invalid SC %d from %q; response body: %s", resp.StatusCode, am.alertURL, string(body)) } return nil } // AlertURLGenerator returns URL to single alert by given name type AlertURLGenerator func(group, id string) string const alertManagerPath = "/api/v2/alerts" // NewAlertManager is a constructor for AlertManager func NewAlertManager(alertManagerURL string, fn AlertURLGenerator, c *http.Client) *AlertManager { return &AlertManager{ alertURL: strings.TrimSuffix(alertManagerURL, "/") + alertManagerPath, argFunc: fn, client: c, } }