ansible-infra/roles/monitoring/tasks/alertmanager.yml

- name: Install Alertmanager
  include_role:
    name: cloudalchemy.alertmanager
    public: yes
  vars:
    alertmanager_web_external_url: "http://{{ alertmanager_domain }}{{ alertmanager_web_path }}"
    alertmanager_config_flags_extra:
      web.route-prefix: /
    alertmanager_web_listen_address: "0.0.0.0:{{ alertmanager_port }}"

- name: Configure Nginx for Alertmaneger
  import_role: 
    name: nginx
  vars:
    nginx_config_file: "{{ inventory_hostname }}.d/alertmanager.conf"
    nginx_server:
      locations:
      - path: "{{ alertmanager_web_path }}/"
        basic_auth:
          file: .htpasswd.alertmanager
          password: "{{ alertmanager_password }}"
        proxy_pass:
          port: "{{ alertmanager_port }}"
          path: /