kolla-ansible/ansible/roles/prometheus/tasks/precheck.yml

---
- name: Get container facts
  become: true
  kolla_container_facts:
    name:
      - prometheus_server
      - prometheus_node_exporter
      - prometheus_haproxy_exporter
      - prometheus_memcached_exporter
      - prometheus_mysqld_exporter
      - prometheus_cadvisor
      - prometheus_alertmanager
      - prometheus_openstack_exporter
      - prometheus_elasticsearch_exporter
  register: container_facts

- name: Checking free port for Prometheus server
  wait_for:
    host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
    port: "{{ prometheus_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['prometheus_server'] is not defined
    - inventory_hostname in groups['prometheus']

- name: Checking free port for Prometheus node_exporter
  wait_for:
    host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
    port: "{{ prometheus_node_exporter_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['prometheus_node_exporter'] is not defined
    - inventory_hostname in groups['prometheus-node-exporter']
    - enable_prometheus_node_exporter | bool

- name: Checking free port for Prometheus mysqld_exporter
  wait_for:
    host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
    port: "{{ prometheus_mysqld_exporter_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['prometheus_mysqld_exporter'] is not defined
    - inventory_hostname in groups['prometheus-mysqld-exporter']
    - enable_prometheus_mysqld_exporter | bool

- name: Checking free port for Prometheus haproxy_exporter
  wait_for:
    host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
    port: "{{ prometheus_haproxy_exporter_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['prometheus_haproxy_exporter'] is not defined
    - inventory_hostname in groups['prometheus-haproxy-exporter']
    - enable_prometheus_haproxy_exporter | bool

- name: Checking free port for Prometheus memcached_exporter
  wait_for:
    host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
    port: "{{ prometheus_memcached_exporter_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['prometheus_memcached_exporter'] is not defined
    - inventory_hostname in groups['prometheus-memcached-exporter']
    - enable_prometheus_memcached_exporter | bool

- name: Checking free port for Prometheus cAdvisor
  wait_for:
    host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
    port: "{{ prometheus_cadvisor_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['prometheus_cadvisor'] is not defined
    - inventory_hostname in groups['prometheus-cadvisor']
    - enable_prometheus_cadvisor | bool

- name: Checking free ports for Prometheus Alertmanager
  wait_for:
    host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
    port: "{{ item }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['prometheus_alertmanager'] is not defined
    - inventory_hostname in groups['prometheus-alertmanager']
    - enable_prometheus_alertmanager | bool
  with_items:
    - "{{ prometheus_alertmanager_port }}"
    - "{{ prometheus_alertmanager_cluster_port }}"

- name: Checking free ports for Prometheus openstack-exporter
  wait_for:
    host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
    port: "{{ item }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['prometheus_openstack_exporter'] is not defined
    - inventory_hostname in groups['prometheus-openstack-exporter']
    - enable_prometheus_openstack_exporter | bool
  with_items:
    - "{{ prometheus_openstack_exporter_port }}"

- name: Checking free ports for Prometheus elasticsearch-exporter
  wait_for:
    host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
    port: "{{ item }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['prometheus_elasticsearch_exporter'] is not defined
    - inventory_hostname in groups['prometheus-elasticsearch-exporter']
    - enable_prometheus_elasticsearch_exporter | bool
  with_items:
    - "{{ prometheus_elasticsearch_exporter_port }}"