pvc-ansible/roles/pvc/handlers/main.yml

---
- name: restart zookeeper
  service:
    name: zookeeper
    state: restarted

- name: restart libvirtd
  service:
    name: libvirtd
    state: restarted
  ignore_errors: true  # Ansible sometimes inexplicably fails to restart

- name: restart frr
  service:
    name: frr
    state: restarted

- name: restart patroni
  service:
    name: patroni
    state: restarted
  ignore_errors: yes

- name: restart prometheus-postgres
  service:
    name: prometheus-postgres-exporter
    state: restarted

- name: restart keydb
  service:
    name: keydb-server
    state: restarted
  ignore_errors: yes

# Restart services one-at-a-time
# Ideally, this would be accomplished by a serial=1, but Ansible doesn't support that and
# likely never will. Instead, we just run the service restart manually, waiting X seconds
# before each iteration, where X is 15 seconds times the "host_id" minus 1. Thus, the
# following host configuration leads to the specified sleep times:
#   * pvchv1: 0s
#   * pvchv2: 15s
#   * pvchv3: 30s
#   * etc.
# This results in a practical sense in a "serial=1" sequence of restarts allowing the service
# to float its primary around after changing a configuration.
# Note that this only applies to coordinators; hypervisor-only nodes restart immediately in
# parallel, and the first two of three handlers do not apply to hypervisor-only nodes.
- name: restart ceph-mon
  shell: "{% if is_coordinator %}sleep {{ 30 * (hostvars[inventory_hostname].ansible_local.host_id|int - 1) }} && systemctl restart ceph-mon@{{ this_node }}.service{% endif %}"
  ignore_errors: true

- name: restart ceph-mgr
  shell: "{% if is_coordinator %}sleep {{ 30 * (hostvars[inventory_hostname].ansible_local.host_id|int - 1) }} &&  systemctl restart ceph-mgr@{{ this_node }}.service{% endif %}"
  ignore_errors: true