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

- name: Install Prometheus
  include_role: 
    name: cloudalchemy.prometheus
    public: yes
  vars:
    prometheus_config_file: "prometheus_custom.yml.j2"
    prometheus_alert_rules: []
    prometheus_web_external_url: "http://{{ prometheus_domain }}{{ prometheus_web_path }}"
    prometheus_config_flags_extra:
      web.route-prefix: /
    prometheus_web_listen_address: "0.0.0.0:{{ prometheus_port }}"

- name: Configure Nginx for Prometheus
  import_role: 
    name: nginx
  vars:
    nginx_config_file: "{{ inventory_hostname }}.d/prometheus.conf"
    nginx_server:
      locations:
      - path: "{{ prometheus_web_path }}/"
        basic_auth:
          file: .htpasswd.prometheus
          password: "{{ prometheus_password }}"
        proxy_pass:
          port: "{{ prometheus_port }}"
          path: /