Add a systemd unit.

defaults/main.yml

@@ -1,7 +1,7 @@
 ---
 # solr
 solr_install: True
-solr_version: 7.4.0
+solr_version: 9.7.0
 solr_http_port: 8983
 solr_service: -solr
 solr_config_name: hindex

handlers/main.yml

@@ -1,6 +1,15 @@
 ---
-- name: solr restart
-  service: name=solr state=restarted
+- name: Solr restart
+  ansible.builtin.service:
+    name: solr
+    state: restarted
 
 - name: Restart Solr prometheus exporter
-  service: name=solr_prometheus_exporter state=restarted enabled=yes
+  ansible.builtin.service:
+    name: solr_prometheus_exporter
+    state: restarted
+    enabled: true
+
+- name: Reload systemd
+  ansible.builtin.systemd:
+    daemon_reload: true

tasks/main.yml

@@ -1,5 +1,10 @@
 ---
-- block:
+- name: Manage the SOLR installation
+  become: true
+  become_user: root
+  when: solr_install
+  tags: solr
+  block:
     - name: Create a solr user
       user: name={{ solr_user }} home={{ solr_base_dir }} createhome=yes shell=/bin/bash system=yes
 
@@ -39,31 +44,47 @@
       with_items:
         - solr.xml
         - zoo.cfg
-      notify: solr restart
+      notify: Solr restart
       tags: [ 'solr', 'solr_default', 'solr_conf' ]
 
     - name: copy extra libraries
       shell: cd {{ solr_server_dir }}; cp -u {{ item }} {{ solr_data_dir }}/lib
       with_items: '{{ solr_jar_files }}'
 
-    - name: install the solr init script
-      template: src=solr  dest=/etc/init.d/solr mode=0755 owner=root group=root
-
     - name: Install the solr default
       template: src=solr-default.j2 dest=/etc/default/solr.in.sh mode=0644 owner=root group=root
-      notify: solr restart
+      notify: Solr restart
       tags: [ 'solr', 'solr_default', 'solr_conf' ]
 
+    - name: install the solr init script
+      template: src=solr  dest=/etc/init.d/solr mode=0755 owner=root group=root
+      when: ansible_service_mgr != 'systemd'
+
+    - name: Install the SOLR systemd unit
+      ansible.builtin.template:
+        src: solr.service.j2
+        dest: /etc/systemd/system/solr.service
+        owner: root
+        group: root
+        mode: "0644"
+      tags: ['solr', 'solr_default', 'solr_conf', 'solr_init']
+      when: ansible_service_mgr == 'systemd'
+      notify: Reload systemd
+    - name: Reload the systemd service
+      ansible.builtin.meta: flush_handlers
+
     - name: Start and enable the solr service
       service: name=solr state=started enabled=yes
-      ignore_errors: True
+      ignore_errors: true
 
-  become: True
+- name: Manage the installation of the Solr metrics exporter
+  become: true
   become_user: root
-  when: solr_install
-  tags: solr
-
-- block:
+  when:
+    - solr_install
+    - solr_prometheus_exporter
+  tags: ['solr', 'solr_prometheus', 'solr_prometheus_exporter']
+  block:
     - name: Create the Solr prometheus exporter conf directory
       file: dest={{ solr_prometheus_conf_dir }} state=directory mode=0755
 
@@ -83,11 +104,3 @@
 
     - name: Ensure that Solr prometheus exporter is started and enabled
       service: name=solr_prometheus_exporter state=started enabled=yes
-
-  become: True
-  become_user: root
-  when:
-    - solr_install
-    - solr_prometheus_exporter
-  tags: [ 'solr', 'solr_prometheus', 'solr_prometheus_exporter' ]
-

templates/solr.service.j2

@@ -0,0 +1,40 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[Unit]
+Description=Apache Solr
+After=network.target
+StartLimitIntervalSec=300
+StartLimitBurst=5
+
+[Service]
+Type=forking
+User=solr
+Environment=SOLR_INCLUDE=/etc/default/solr.in.sh
+Environment=RUNAS=solr
+ExecStart=${SOLR_INSTALL_DIR}/bin/solr start
+ExecStop=${SOLR_INSTALL_DIR}/bin/solr stop
+Restart=on-failure
+RestartSec=3s
+TimeoutSec=180s
+PrivateTmp=true
+LimitNOFILE=65000
+LimitNPROC=65000
+Restart=on-failure
+RestartSec=5
+
+
+[Install]
+WantedBy=multi-user.target