---
# For some currently unknown reason, overcloud hosts end up with multiple
# entries in /etc/hosts that map their own hostname to their admin
# 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 incorrect IPs
  hosts: overcloud
  tags:
    - etc-hosts-fixup
  tasks:
    # Remove any entries from /etc/hosts that map the current hostname to an IP
    # other than the host's IP on the internal API network.
    - name: Ensure overcloud hosts' /etc/hosts does not contain incorrect IPs
      lineinfile:
        dest: /etc/hosts
        regexp: "^(?!{{ internal_net_name | net_ip | regex_escape }})[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+[ \t]*{{ ansible_facts.hostname }}"
        state: absent
        # Ensure that the correct entry is present.
        validate: "grep -E '^({{ internal_net_name | net_ip | regex_escape }}).*{{ ansible_facts.hostname }}' %s"
      become: True

- name: Ensure rabbitmq containers' /etc/hosts does not contain incorrect IPs
  hosts: overcloud
  tags:
    - etc-hosts-fixup
  vars:
    rabbitmq_containers:
      - rabbitmq
      - outward_rabbitmq
  tasks:
    - 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: Copy /etc/hosts into rabbitmq containers
      command: docker cp /etc/hosts {{ item.item }}:/tmp/hosts
      with_items: "{{ ps_result.results }}"
      when: item.rc == 0
      changed_when: false

    - name: Ensure rabbitmq containers' /etc/hosts does not contain incorrect IPs
      command: >
        docker exec -u root {{ item.item }}
        bash -c
         '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_items: "{{ ps_result.results }}"
      when: item.rc == 0
      register: sed_result

    - name: Check that RabbitMQ client works
      command: docker exec {{ item.item }} rabbitmqctl status
      with_items: "{{ ps_result.results }}"
      when: item.rc == 0
      changed_when: false