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/none.yml

@@ -0,0 +1,4 @@
+---
+- name: "Display message"
+  ansible.builtin.debug:
+    msg: "keycloak_quarkus_restart_strategy is none, skipping restart"

roles/keycloak_quarkus/tasks/restart/serial.yml

@@ -0,0 +1,8 @@
+---
+- name: "Restart services in serial, with optional healtch check (keycloak_quarkus_restart_health_check)"
+  throttle: 1
+  loop: "{{ ansible_play_hosts }}"
+  block:
+    - name: "Restart and enable {{ keycloak.service_name }} service on first host"
+      ansible.builtin.include_tasks: ../restart.yml
+      delegate_to: "{{ item }}"

roles/keycloak_quarkus/tasks/restart/verify_first.yml

@@ -0,0 +1,34 @@
+---
+- name: Verify first restarted service with health URL, then rest in parallel
+  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: "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: "{{ keycloak_quarkus_restart_pause }}"
+      when:
+        - keycloak_quarkus_ha_enabled
+
+    - name: "Restart and enable {{ keycloak.service_name }} service on other hosts"
+      ansible.builtin.include_tasks: ../restart.yml
+      delegate_to: "{{ item }}"
+      loop: "{{ ansible_play_hosts }}"
+      when: inventory_hostname != ansible_play_hosts | first