Ansible role: Alertmanager

Install and configure Prometheus Alertmanager

Requirements

• Ansible >= 2.21
• Debian
  • Trixie

Role variables

Name	Type	Required	Default	Comment
alertmanager_version	str	no	0.33.1	alertmanager version to install
alertmanager_checksum	str	no	sha256:93d802cba6a8d27239d747ce117df7648d326ab67394e32247540b030e9842ba	checksum of alertmanager binary
alertmanager_gid	int	no	2001	gid of alertmanager group used to run service
alertmanager_uid	int	no	2001	uid of alertmanager user used to run service
alertmanager_data_dir	str	no	/var/lib/alertmanager	folder for alertmanager data
alertmanager_args	list(str)	no		alertmanager launcher's arguments
alertmanager_config	dict	yes		alertmanager general config

alertmanager_config

alertmanager general config, see documentation for all parameters

global:
  smtp_from: "alertmanager@localhost"
  smtp_smarthost: "localhost:25"
receivers:
  - name: "default-receiver"
    email_configs:
      - to: "support@localhost"
        send_resolved: true
route:
  receiver: "default-receiver"
  group_by: ["instance"]
  group_wait: "30s"
  group_interval: "5m"
  repeat_interval: "1h"
  routes: []

How to use

- hosts: monitoring
  roles:
    - nishiki.alertmanager
  vars:
    alertmanager_version: "0.33.1"
    alertmanager_checksum: "sha256:93d802cba6a8d27239d747ce117df7648d326ab67394e32247540b030e9842ba"
    alertmanager_download_url: >-
      https://github.com/prometheus/alertmanager/releases/download/v{{
      alertmanager_version }}/alertmanager-{{ alertmanager_version }}.linux-amd64.tar.gz
    alertmanager_gid: 2001
    alertmanager_uid: 2001
    alertmanager_data_dir: "/var/lib/alertmanager"
    alertmanager_config:
      global:
        smtp_from: "alertmanager@localhost"
        smtp_smarthost: "localhost:25"
      receivers:
        - name: "default-receiver"
          email_configs:
            - to: "support@localhost"
              send_resolved: true
      route:
        receiver: "default-receiver"
        group_by: ["instance"]
        group_wait: "30s"
        group_interval: "5m"
        repeat_interval: "1h"
        routes: []

Development

Test with molecule and docker

• install docker
• install python3 and python3-pip
• install molecule and dependencies pip3 install molecule molecule-plugins ansible-lint pytest-testinfra yamllint
• run molecule test

License

Copyright (c) 2026 Adrien Waksberg

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.