116 lines
2.8 KiB
Go
116 lines
2.8 KiB
Go
// Copyright 2022 Prometheus Team
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package webex
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import (
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"bytes"
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"context"
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"encoding/json"
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"net/http"
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"github.com/go-kit/log"
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"github.com/go-kit/log/level"
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commoncfg "github.com/prometheus/common/config"
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"github.com/prometheus/alertmanager/config"
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"github.com/prometheus/alertmanager/notify"
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"github.com/prometheus/alertmanager/template"
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"github.com/prometheus/alertmanager/types"
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)
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const (
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// nolint:godot
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// maxMessageSize represents the maximum message length that Webex supports.
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maxMessageSize = 7439
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)
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type Notifier struct {
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conf *config.WebexConfig
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tmpl *template.Template
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logger log.Logger
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client *http.Client
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retrier *notify.Retrier
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}
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// New returns a new Webex notifier.
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func New(c *config.WebexConfig, t *template.Template, l log.Logger, httpOpts ...commoncfg.HTTPClientOption) (*Notifier, error) {
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client, err := commoncfg.NewClientFromConfig(*c.HTTPConfig, "webex", httpOpts...)
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if err != nil {
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return nil, err
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}
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n := &Notifier{
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conf: c,
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tmpl: t,
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logger: l,
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client: client,
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retrier: ¬ify.Retrier{},
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}
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return n, nil
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}
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type webhook struct {
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Markdown string `json:"markdown"`
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RoomID string `json:"roomId,omitempty"`
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}
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// Notify implements the Notifier interface.
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func (n *Notifier) Notify(ctx context.Context, as ...*types.Alert) (bool, error) {
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key, err := notify.ExtractGroupKey(ctx)
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if err != nil {
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return false, err
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}
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level.Debug(n.logger).Log("incident", key)
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data := notify.GetTemplateData(ctx, n.tmpl, as, n.logger)
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tmpl := notify.TmplText(n.tmpl, data, &err)
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if err != nil {
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return false, err
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}
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message := tmpl(n.conf.Message)
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if err != nil {
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return false, err
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}
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message, truncated := notify.TruncateInBytes(message, maxMessageSize)
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if truncated {
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level.Debug(n.logger).Log("msg", "message truncated due to exceeding maximum allowed length by webex", "truncated_message", message)
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}
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w := webhook{
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Markdown: message,
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RoomID: tmpl(n.conf.RoomID),
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}
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var payload bytes.Buffer
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if err = json.NewEncoder(&payload).Encode(w); err != nil {
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return false, err
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}
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resp, err := notify.PostJSON(ctx, n.client, n.conf.APIURL.String(), &payload)
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if err != nil {
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return true, notify.RedactURL(err)
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}
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shouldRetry, err := n.retrier.Check(resp.StatusCode, resp.Body)
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if err != nil {
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return shouldRetry, err
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}
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return false, nil
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}
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