---
# For some currently unknown reason, overcloud hosts end up with multiple
# entries in /etc/hosts that map their own hostname to their provisioning
# network IP address, in addition to one that maps their own hostname to their
# internal network IP address. This causes RabbitMQ upgrades to fail, as
# RabbitMQ expects the system's hostname to resolve to the IP address on
# which it is listening. As a workaround, we remove the stale entries from
# /etc/hosts.  See https://github.com/stackhpc/kayobe/issues/14.

- name: Ensure overcloud hosts' /etc/hosts does not contain provisioning network IP
  hosts: overcloud
  tags:
    - etc-hosts-fixup
  tasks:
    - name: Ensure overcloud hosts' /etc/hosts does not contain provisioning network or loopback IPs
      lineinfile:
        dest: /etc/hosts
        regexp: "^{{ item }}[ \t]*{{ inventory_hostname }}"
        state: absent
      with_items:
        - "127.0.0.1"
        - "{{ provision_oc_net_name | net_ip }}"
      when: provision_oc_net_name | net_ip != None
      become: True

- name: Ensure rabbitmq containers' /etc/hosts does not contain provisioning network or loopback IPs
  hosts: overcloud
  tags:
    - etc-hosts-fixup
  vars:
    rabbitmq_containers:
      - rabbitmq
      - outward_rabbitmq
  tasks:
    - block:
        - name: Check whether rabbitmq container is running
          command: docker inspect -f {{ '{{.Id}}' }} {{ item }}
          changed_when: False
          failed_when: False
          with_items: "{{ rabbitmq_containers }}"
          register: ps_result

        - name: Ensure rabbitmq containers' /etc/hosts does not contain provisioning network or loopback IPs
          command: >
            docker exec -u root {{ item.0.item }}
            bash -c
            'cp /etc/hosts /tmp/hosts &&
             sed -i -e "/^{{ item.1 }}[ \t]*{{ inventory_hostname }}/d" /tmp/hosts &&
             if ! diff -q /tmp/hosts /etc/hosts >/dev/null; then
               cp /tmp/hosts /etc/hosts &&
               echo changed
             fi &&
             rm /tmp/hosts'
          changed_when: "'changed' in sed_result.stdout"
          with_nested:
            - "{{ ps_result.results }}"
            - - "127.0.0.1"
              - "{{ provision_oc_net_name | net_ip }}"
          when: item.0.rc == 0
          register: sed_result
      when: provision_oc_net_name | net_ip != None