Add restart strategies, and allow custom task include

Co-authored-by: Helmut Wolf <hwo@world-direct.at>
Co-authored-by: Guido Grazioli <ggraziol@redhat.com>

roles/keycloak_quarkus/tasks/restart.yml

@@ -1,38 +1,17 @@
 ---
-- name: Ensure only one service at a time gets rebooted, to ensure replication of distributed ispn caches
-  throttle: 1
-  block:
-    - name: "Restart and enable {{ keycloak.service_name }} service on first host"
-      ansible.builtin.systemd:
-        name: "{{ keycloak.service_name }}"
-        enabled: true
-        state: restarted
-        daemon_reload: true
-      become: true
-      delegate_to: "{{ ansible_play_hosts | first }}"
-      run_once: true
+- name: "Restart and enable {{ keycloak.service_name }} service"
+  ansible.builtin.systemd:
+    name: "{{ keycloak.service_name }}"
+    enabled: true
+    state: restarted
+    daemon_reload: true
+  become: true
 
-    - name: "Wait until {{ keycloak.service_name }} service becomes active {{ keycloak.health_url }}"
-      ansible.builtin.uri:
-        url: "{{ keycloak.health_url }}"
-      register: keycloak_status
-      until: keycloak_status.status == 200
-      retries: 25
-      delay: 10
-      delegate_to: "{{ ansible_play_hosts | first }}"
-      run_once: true
-
-    - name: Pause to give distributed ispn caches time to (re-)replicate back onto first host
-      ansible.builtin.pause:
-        seconds: 15
-      when:
-        - keycloak_quarkus_ha_enabled
-
-    - name: "Restart and enable {{ keycloak.service_name }} service on all other hosts"
-      ansible.builtin.systemd:
-        name: "{{ keycloak.service_name }}"
-        enabled: true
-        state: restarted
-        daemon_reload: true
-      become: true
-      when: inventory_hostname != ansible_play_hosts | first
+- name: "Wait until {{ keycloak.service_name }} service becomes active {{ keycloak.health_url }}"
+  ansible.builtin.uri:
+    url: "{{ keycloak.health_url }}"
+  register: keycloak_status
+  until: keycloak_status.status == 200
+  retries: 25
+  delay: 10
+  when: keycloak_quarkus_restart_health_check