Alertmanager Discord Webhook

A minimal docker image with golang application, which listens for Prometheus Alertmanager's notifications and pushes them to Discord channel.

Repository name in Docker Hub: rogerrum/alertmanager-discord
Published via automated build mechanism

Give this a webhook (with the DISCORD_WEBHOOK environment variable) and point it as a webhook on alertmanager, and it will post your alerts into a discord channel for you as they trigger:

Environment configuration variables

DISCORD_WEBHOOK=<webhook, where to post alerts. For more details see: https://support.discordapp.com/hc/en-us/articles/228383668-Intro-to-Webhooks>
ADDITIONAL_DISCORD_WEBHOOKS=<Optional - additional comma-delimited webhook urls>
DISCORD_USERNAME=<override bot name at Discord>
DISCORD_AVATAR_URL=<override avatar url at Discord (optional)>
LISTEN_ADDRESS=<address and port to listen on (default:127.0.0.1:9094)>
VERBOSE=ON <(Optional - logs request and response)>

Warning

This program is not a replacement to alertmanager, it accepts webhooks from alertmanager, not prometheus.

The standard "dataflow" should be:

Prometheus -------------> alertmanager -------------------> alertmanager-discord

alerting:                 receivers:                         
  alertmanagers:          - name: 'discord_webhook'         environment:
  - static_configs:         webhook_configs:                   - DISCORD_WEBHOOK=https://discordapp.com/api/we...
    - targets:              - url: 'http://localhost:9094'     - DISCORD_USERNAME=<override username if needed>
       - 127.0.0.1:9093                                        - DISCORD_AVATAR_URL=<override avatar url if needed>

Example alertmanager config:

global:
  # The smarthost and SMTP sender used for mail notifications.
  smtp_smarthost: 'localhost:25'
  smtp_from: 'alertmanager@example.org'
  smtp_auth_username: 'alertmanager'
  smtp_auth_password: 'password'

# The directory from which notification templates are read.
templates: 
- '/etc/alertmanager/template/*.tmpl'

# The root route on which each incoming alert enters.
route:
  group_by: ['alertname']
  group_wait: 20s
  group_interval: 5m
  repeat_interval: 3h 
  receiver: discord_webhook

receivers:
- name: 'discord_webhook'
  webhook_configs:
  - url: 'http://localhost:9094'

For more details see: https://prometheus.io/docs/alerting/configuration/

Inspired by

• https://github.com/benjojo/alertmanager-discord