tomcat.yml

```yaml
- name: Installing Tomcat
  hosts: app-server
  become: yes

  vars:
    tomcat_user: tomcat
    tomcat_group: tomcat

    tomcat_version: 8.5.58
    tomcat_version_major: "{{ tomcat_version.split('.')[0] }}"

    tomcat_url: https://archive.apache.org/dist/tomcat/tomcat-{{ tomcat_version_major }}/v{{ tomcat_version }}/bin/apache-tomcat-{{ tomcat_version }}.tar.gz
    tomcat_home: /usr/share/tomcat

    tomcat_admin_username: admin
    tomcat_admin_password: password

  tasks:
  - name: Install Java 1.8
    yum:
      name: java-1.8.0-openjdk 
      state: present

  - name: Create tomcat Group
    group:
      name: "{{ tomcat_group }}"

  - name: Add user "tomcat"
    user:
      name: "{{ tomcat_user }}"
      group: "{{ tomcat_group }}"
      home: "{{ tomcat_home }}"
      createhome: no

  - name: Download Tomcat
    get_url:
      url: "{{ tomcat_url }}"
      dest: /opt/apache-tomcat-{{ tomcat_version }}.tar.gz
      checksum: "md5:9def3ec8010601a837373a1754e97d9d"

  - name: Unpack Tomcat Archive
    unarchive:
      src: /opt/apache-tomcat-{{ tomcat_version }}.tar.gz
      dest: /opt/
      remote_src: yes
      owner: "{{ tomcat_user }}"
      group: "{{ tomcat_group }}"
      # use this as a workaround for an idempetency matter
      creates: /opt/apache-tomcat-{{ tomcat_version }}/conf/tomcat-users.xml
    notify: restart webapp-server

  - name: Symlink install directory
    file:
      src: /opt/apache-tomcat-{{ tomcat_version }}
      path: "{{ tomcat_home }}"
      state: link

  - name: Copy Users Configuration
    template:
      src: tomcat-users.xml.j2
      dest: /opt/apache-tomcat-{{ tomcat_version }}/conf/tomcat-users.xml
      owner: "{{ tomcat_user }}"
      group: "{{ tomcat_group }}"

  - name: Disable Manager Access Restrictions
    replace:
      path: "/opt/apache-tomcat-{{ tomcat_version }}/webapps/manager/META-INF/context.xml"
      regexp: (\s\+<)(Valve[^>]*/)>
      replace: \1!--\2--
      backup: yes

  - name: Copy Tomcat Service File
    template:
      src: tomcat.service.j2
      dest: /usr/lib/systemd/system/tomcat.service

  - name: Ensure Tomcat Service Enabled and Running
    systemd:
      name: tomcat
      state: started
      enabled: yes
      
  - name: Check port 8080
    wait_for: 
      port: 8080
      delay: 10

  handlers: 
  - name: restart webapp-server
    systemd: daemon_reload=yes name=webapp-server state=restarted
```


Idempotancy check:
```yaml
- name: Installing Tomcat
  hosts: app-server

  vars:
    tomcat_user: tomcat
    tomcat_group: tomcat

    tomcat_version: 8.5.58
    tomcat_version_major: "{{ tomcat_version.split('.')[0] }}"

    tomcat_url: https://archive.apache.org/dist/tomcat/tomcat-{{ tomcat_version_major }}/v{{ tomcat_version }}/bin/apache-tomcat-{{ tomcat_version }}.tar.gz
    tomcat_home: /usr/share/tomcat

    tomcat_admin_username: admin
    tomcat_admin_password: password

  tasks:
  - name: Install Java 1.8
    yum:
      name: java-1.8.0-openjdk 
      state: present
    become: yes

  - name: Create tomcat Group
    group:
      name: "{{ tomcat_group }}"
    become: yes

  - name: Add user "tomcat"
    user:
      name: "{{ tomcat_user }}"
      group: "{{ tomcat_group }}"
      home: "{{ tomcat_home }}"
      createhome: no
    become: yes

  - name: Download Tomcat
    get_url:
      url: "{{ tomcat_url }}"
      dest: /opt/apache-tomcat-{{ tomcat_version }}.tar.gz
      checksum: "md5:9def3ec8010601a837373a1754e97d9d"
    become: yes

  - name: Unpack Tomcat Archive
    unarchive:
      src: /opt/apache-tomcat-{{ tomcat_version }}.tar.gz
      dest: /opt/
      remote_src: yes
      owner: "{{ tomcat_user }}"
      group: "{{ tomcat_group }}"
      # use this as a workaround for an idempotency matter
      creates: /opt/apache-tomcat-{{ tomcat_version }}/conf/tomcat-users.xml
    notify: restart server
    become: yes

  - name: Symlink install directory
    file:
      src: /opt/apache-tomcat-{{ tomcat_version }}
      path: "{{ tomcat_home }}"
      state: link
    become: yes

  - name: Copy Users Configuration
    template:
      src: tomcat-users.xml.j2
      dest: /opt/apache-tomcat-{{ tomcat_version }}/conf/tomcat-users.xml
      owner: "{{ tomcat_user }}"
      group: "{{ tomcat_group }}"
    notify: restart server
    become: yes

  - name: Disable Manager Access Restrictions
    replace:
      path: "{{ tomcat_home }}/webapps/manager/META-INF/context.xml"
      regexp: (\s\+<)(Valve[^>]*/)>
      replace: \1!--\2--
      backup: yes
    become: yes

  - name: Copy Tomcat Service File
    template:
      src: tomcat.service.j2
      dest: /usr/lib/systemd/system/tomcat.service
    notify: reload daemons
    become: yes

  - name: Ensure Tomcat Service Enabled and Running
    systemd:
      name: tomcat
      state: started
      enabled: yes
    become: yes

  - wait_for:
      host: 0.0.0.0
      port: 8080
      state: drained
      timeout: 60

  handlers:
  - name: Restart Tomcat after config changes
    systemd:
      name: tomcat
      state: restarted
    listen: restart server
    become: yes
  - name: Reload daemon
    systemd:
      name: tomcat
      state: reloaded
    listen: reload daemons
    become: yes
```

```yaml
- name: Installing Tomcat
  hosts: app-server
  become: yes

  vars:
    tomcat_user: tomcat
    tomcat_group: tomcat

    tomcat_version: 8.5.58
    tomcat_version_major: "{{ tomcat_version.split('.')[0] }}"

    tomcat_url: https://archive.apache.org/dist/tomcat/tomcat-{{ tomcat_version_major }}/v{{ tomcat_version }}/bin/apache-tomcat-{{ tomcat_version }}.tar.gz
    tomcat_home: /usr/share/tomcat

    tomcat_admin_username: admin
    tomcat_admin_password: password

  tasks:
  - name: Install Java 1.8
    yum:
      name: java-1.8.0-openjdk 
      state: present

  - name: Create tomcat Group
    group:
      name: "{{ tomcat_group }}"

  - name: Add user "tomcat"
    user:
      name: "{{ tomcat_user }}"
      group: "{{ tomcat_group }}"
      home: "{{ tomcat_home }}"
      createhome: no

  - name: Download Tomcat
    get_url:
      url: "{{ tomcat_url }}"
      dest: /opt/apache-tomcat-{{ tomcat_version }}.tar.gz
      checksum: "md5:9def3ec8010601a837373a1754e97d9d"

  - name: Unpack Tomcat Archive
    unarchive:
      src: /opt/apache-tomcat-{{ tomcat_version }}.tar.gz
      dest: /opt/
      remote_src: yes
      owner: "{{ tomcat_user }}"
      group: "{{ tomcat_group }}"
      # use this as a workaround for an idempetency matter
      creates: /opt/apache-tomcat-{{ tomcat_version }}/conf/tomcat-users.xml
      notify: "restart tomcat"

  - name: Symlink install directory
    file:
      src: /opt/apache-tomcat-{{ tomcat_version }}
      path: "{{ tomcat_home }}"
      state: link

  - name: Copy Users Configuration
    template:
      src: tomcat-users.xml.j2
      dest: /opt/apache-tomcat-{{ tomcat_version }}/conf/tomcat-users.xml
      owner: "{{ tomcat_user }}"
      group: "{{ tomcat_group }}"
    
  - name: Disable Manager Access Restrictions
    replace:
      path: "{{ tomcat_home }}/webapps/manager/META-INF/context.xml"
      regexp: (\s\+<)(Valve[^>]*/)>
      replace: \1!--\2--
      backup: yes

  - name: Copy Tomcat Service File
    template:
      src: tomcat.service.j2
      dest: /usr/lib/systemd/system/tomcat.service
      notify: "reload daemon"

  - name: Ensure Tomcat Service Enabled and Running
    systemd:
      name: tomcat
      state: started
      enabled: yes

  - name: Waits for port 8080 of any IP
    wait_for:
      host: 0.0.0.0
      port: 8080
      state: drained

  handlers:
  - name: Restart Tomcat
    systemd:
      name: tomcat
      state: restarted
    listen: restart tomcat
    become: yes
  - name: Reload daemon
    systemd:
      name: tomcat
      state: reloaded
    listen: reload daemon
    become: yes
```


```yaml
- name: Installing Tomcat
  hosts: app-server
  become: yes
  vars:
    tomcat_user: tomcat
    tomcat_group: tomcat

    tomcat_version: 8.5.58
    tomcat_version_major: "{{ tomcat_version.split('.')[0] }}"

    tomcat_url: https://archive.apache.org/dist/tomcat/tomcat-{{ tomcat_version_major }}/v{{ tomcat_version }}/bin/apache-tomcat-{{ tomcat_version }}.tar.gz
    tomcat_home: /usr/share/tomcat

    tomcat_admin_username: admin
    tomcat_admin_password: password

  tasks:
  - name: Install Java 1.8
    yum:
      name: java-1.8.0-openjdk 
      state: present

  - name: Create tomcat Group
    group:
      name: "{{ tomcat_group }}"

  - name: Add user "tomcat"
    user:
      name: "{{ tomcat_name }}"
      group: "{{ tomcat_group }}"
      home: "{{ tomcat_home }}"
      createhome: no

  - name: Download Tomcat
    get_url:
      url: "{{ tomcat_url }}"
      dest: /opt/apache-tomcat-{{ tomcat_version }}.tar.gz
      checksum: "md5:9def3ec8010601a837373a1754e97d9d"

  - name: Unpack Tomcat Archive
    unarchive:
      src: /opt/apache-tomcat-{{ tomcat_version }}.tar.gz
      dest: /opt/
      remote_src: yes
      owner: "{{ tomcat_name }}"
      group: "{{ tomcat_group }}"
      # use this as a workaround for an idempetency matter
      creates: /opt/apache-tomcat-{{ tomcat_version }}/conf/tomcat-users.xml

  - name: Symlink install directory
    file:
      src: /opt/apache-tomcat-{{ tomcat_version }}
      path: "{{ tomcat_home }}"
      state: link

  - name: Copy Users Configuration
    template:
      src: tomcat-users.xml.j2
      dest: /opt/apache-tomcat-{{ tomcat_version }}/conf/tomcat-users.xml
      owner: "{{ tomcat_name }}"
      group: "{{ tomcat_group }}"
    notify:
      - Restart Tomcat
      - wait port before

  - name: Disable Manager Access Restrictions
    replace:
      path: "/opt/apache-tomcat-{{ tomcat_version }}/webapps/manager/META-INF/context.xml"
      regexp: (\s\+<)(Valve[^>]*/)>
      replace: \1!--\2--
      backup: yes

  - name: Copy Tomcat Service File
    template:
      src: tomcat.service.j2
      dest: /usr/lib/systemd/system/tomcat.service
    notify:
    - Restart Tomcat
    - wait port before

  - name: Ensure Tomcat Service Enabled and Running
    systemd:
      name: tomcat
      state: started
      enabled: yes
      daemon_reload: yes

  handlers:
  - name: wait port before
    wait_for: port=8080 delay=5
  - name: Restart Tomcat
    systemd: name=tomcat state=restarted
```