Ceph alertmanager config

Question

I've installed ceph using cephadm

Including monitoring stack prometheus, alertmanager, node-exporter

Currently I'm trying to add a telegram receiver (Telegram is supported from v0.24.0, so I've manually updated mgr/container_image_alertmanager fro 0.23 to 0.24) for alertmanager, but can't find in docs where alertmanager.yml should be created.

I can see this file is created inside ceph cluster /var/lib/ceph/{hash}/alertmanager.ceph-1/etc/alertmanager/alertmanager.yml

I've added the config to the above file as below:

templates:
  - '/etc/alertmanager/config/*.tmpl'
route:
  receiver: 'default'
  routes:
    - group_by: ['alertname']
      group_wait: 10s
      group_interval: 10s
      repeat_interval: 30m
      receiver: 'telegram'
receivers:
- name: 'default'
  webhook_configs:
- name: 'ceph-dashboard'
  webhook_configs:
  - url: 'https://ceph-1:8443/api/prometheus_receiver'
- name: 'telegram'
  telegram_configs:
    - bot_token: <bot_token>
      chat_id: <chat_id>
      send_resolved: true
      parse_mode: 'HTML'
      api_url: 'https://api.telegram.org'
      message: '{{ template "telegram.text" . }}'

The receiver works fine, but after redeploying the alertmanager from Ceph dashboard the config is gone, and is logical, becuase I'm editing generated file.

Please if anyone can assist and/or point to correct direction where I should create alertmanager config to extend/override the defaults.

score 0 · Accepted Answer · answered Nov 14 '22 at 07:42

Found the the answer in docs: monitoring

Created a file called alertmanager.yml.j2 in /var/lib/ceph/{CLUSTER_ID}/home

and applied inside cephadm shell

ceph config-key set mgr/cephadm/services/alertmanager/alertmanager.yml -i $PWD/alertmanager.yml.j2

After redeploying all settings where there.

Ceph alertmanager config

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