alertmanager-discord

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:

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'  
       - 127.0.0.1:9093   

Example alertmanager config:

global:
  # The smarthost and SMTP sender used for mail notifications.
  smtp_smarthost: 'localhost:25'
  smtp_from: '[email protected]'
  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'

Docker

If you run a fancy docker/k8s infra, you can find the docker hub repo here: https://hub.docker.com/r/benjojo/alertmanager-discord/

how to check webhook

export DISCORD_WEBHOOK=https://discord.com/api/webhooks/xx/xx

curl -s $DISCORD_WEBHOOK -i -H "Accept: application/json" -H "Content-Type:application/json" -X POST \
--data '
    {
        "content":"",
        "embeds":[
            {"title":"",
             "description":"FIRE: alertname on 1.example.net",
             "color":10038562
            },
            {"title":"",
             "description":"RESOLVE: alertname on 2.example.net",
             "color":3066993
            }
        ]
    }'

how to test this app

cd ./example && docker-compose up --build

and send an alert

curl -XPOST localhost:9093/api/v1/alerts -d '[
{
    "status": "firing",
    "labels": {
        "alertname": "KubePodCrashLooping",
        "service": "postgresql-1",
        "severity":"critical",
        "instance": "172.1.1.1:8080"
    },
    "annotations": {
        "summary": "summary",
        "description": "Pod my-pod-597fc9b5bb-55kdb (service) is restarting 0.34 times / 5 minutes."
    },
    "generatorURL": "xxx"
},
{
    "status": "firing",
    "labels": {
        "alertname": "KubePodCrashLooping",
        "service": "postgresql-1",
        "severity":"critical",
        "instance": "172.1.1.2:8080"
    },
    "annotations": {
        "summary": "summary",
        "description": "Pod my/pod-597fc9b5bb-9b5bb (service) is restarting 0.34 times / 5 minutes."
    },
    "generatorURL": "xxx"
}
]'