hana_exists.yml

---

## Try to use saphostctrl to figure out if HANA or other SID is installed
- name: SAP HANA Checks - Check if saphostctrl is installed
  ansible.builtin.stat:
    path: /usr/sap/hostctrl/exe/saphostctrl
  check_mode: no
  register: __sap_hana_install_register_stat_saphostctrl
  failed_when: no

- name: SAP HANA Checks - Check if SAP instances are installed with saphostctrl
  when: __sap_hana_install_register_stat_saphostctrl.stat.exists
  block:

    - name: SAP HANA Checks - Get list of installed SAP instances
      ansible.builtin.shell: /usr/sap/hostctrl/exe/saphostctrl -function ListInstances | cut -d":" -f2-
      register: __sap_hana_install_register_instancelist
      changed_when: false

    - name: SAP HANA Checks - Display instances
      ansible.builtin.debug:
        var: __sap_hana_install_register_instancelist.stdout_lines
        verbosity: 1

    - name: SAP HANA Checks - Desired HANA is installed and running
      ansible.builtin.set_fact:
        __sap_hana_install_fact_is_installed: true
      when:
        - __sap_hana_install_loop_instance.split('-')[0] | trim == sap_hana_install_sid
        - __sap_hana_install_loop_instance.split('-')[1] | trim == sap_hana_install_number
      loop: "{{ __sap_hana_install_register_instancelist.stdout_lines }}"
      loop_control:
        loop_var: __sap_hana_install_loop_instance
        label: "{{ __sap_hana_install_loop_instance.split('-')[0] | trim }}"

    - name: SAP HANA Checks - Trying to install HANA with other SID and existing instance number
      ansible.builtin.fail:
        msg: "The instance number {{ sap_hana_install_number }} is already used by
              HANA system {{ __sap_hana_install_loop_instance.split('-')[0] | trim }}!"
      when:
        - __sap_hana_install_loop_instance.split('-')[0] | trim != sap_hana_install_sid
        - __sap_hana_install_loop_instance.split('-')[1] | trim == sap_hana_install_number
      loop: "{{ __sap_hana_install_register_instancelist.stdout_lines }}"
      loop_control:
        loop_var: __sap_hana_install_loop_instance
        label: "{{ __sap_hana_install_loop_instance.split('-')[0] | trim }}"

    - name: SAP HANA Checks - Trying to install HANA with existing SID and other instance number
      ansible.builtin.fail:
        msg: "HANA system {{ sap_hana_install_sid }} already exists with different instance number
              {{ __sap_hana_install_loop_instance.split('-')[1] | trim }}!"
      when:
        - __sap_hana_install_loop_instance.split('-')[0] | trim  == sap_hana_install_sid
        - __sap_hana_install_loop_instance.split('-')[1] | trim != sap_hana_install_number
      loop: "{{ __sap_hana_install_register_instancelist.stdout_lines }}"
      loop_control:
        loop_var: __sap_hana_install_loop_instance
        label: "{{ __sap_hana_install_loop_instance.split('-')[0] | trim }}"

## If saphostcontrol is not installed

- name: SAP HANA Checks - Check directories if no saphostctrl is found
  when: not __sap_hana_install_register_stat_saphostctrl.stat.exists
  block:

    - name: SAP HANA Checks - Get status of '/hana/shared/{{ sap_hana_install_sid }}'
      ansible.builtin.stat:
        path: "/hana/shared/{{ sap_hana_install_sid }}"
      check_mode: no
      register: __sap_hana_install_register_stat_hana_shared_sid_assert
      failed_when: no

    - name: SAP HANA Checks - Get contents of '/hana/shared/{{ sap_hana_install_sid }}'
      ansible.builtin.find:
        paths: "/hana/shared/{{ sap_hana_install_sid }}"
        patterns: '*'
      register: __sap_hana_install_register_files_in_hana_shared_sid_assert
      when: __sap_hana_install_register_stat_hana_shared_sid_assert.stat.exists

    - name: SAP HANA Checks - Fail if directory '/hana/shared/{{ sap_hana_install_sid }}' exists and is not empty
      ansible.builtin.fail:
        msg: "FAIL: Directory '/hana/shared/{{ sap_hana_install_sid }}' exists and is not empty!"
      when:
        - __sap_hana_install_register_stat_hana_shared_sid_assert.stat.exists
        - __sap_hana_install_register_files_in_hana_shared_sid_assert.matched | int != 0

    - name: SAP HANA Checks - Get status of '/usr/sap/{{ sap_hana_install_sid }}'
      ansible.builtin.stat:
        path: "/usr/sap/{{ sap_hana_install_sid }}"
      check_mode: no
      register: __sap_hana_install_register_stat_usr_sap_sid_assert
      failed_when: no

    - name: SAP HANA Checks - Get contents of '/usr/sap/{{ sap_hana_install_sid }}'
      ansible.builtin.find:
        paths: "/usr/sap/{{ sap_hana_install_sid }}"
        patterns: '*'
      register: __sap_hana_install_register_files_in_usr_sap_sid_assert
      when: __sap_hana_install_register_stat_usr_sap_sid_assert.stat.exists

    - name: SAP HANA Checks - Fail if directory '/usr/sap/{{ sap_hana_install_sid }}' exists and is not empty
      ansible.builtin.fail:
        msg: "FAIL: Directory '/usr/sap/{{ sap_hana_install_sid }}' exists and is not empty!"
      when:
        - __sap_hana_install_register_stat_usr_sap_sid_assert.stat.exists
        - __sap_hana_install_register_files_in_usr_sap_sid_assert.matched | int != 0

- name: SAP HANA Checks - HANA admin user check
  when:
    - sap_hana_install_check_sidadm_user | d(true)
    - not __sap_hana_install_fact_is_installed | d(false)
  block:

    - name: SAP HANA Checks - Get info about '{{ sap_hana_install_sid | lower }}adm' user
      ansible.builtin.command: getent passwd {{ sap_hana_install_sid | lower }}adm
      check_mode: no
      register: __sap_hana_install_register_getent_passwd_sidadm
      changed_when: no
      failed_when: no

    - name: SAP HANA Checks - Fail if the user '{{ sap_hana_install_sid | lower }}adm' exists
      ansible.builtin.fail:
        msg: "FAIL: User '{{ sap_hana_install_sid | lower }}adm' exists!"
      when: __sap_hana_install_register_getent_passwd_sidadm.rc == 0

# The role supports specifying the SAP HANA group id in variable `sap_hana_install_groupid`, which is the id of the sapsys group.
# The SAP HANA installation will fail if there is already a group named sapsys but with a different ID. Let's better fail before.
- name: SAP HANA Checks - Check HANA admin group
  when:
    - sap_hana_install_groupid is defined
    - sap_hana_install_groupid | string != "None"
    - sap_hana_install_groupid | string | length > 0
    - not __sap_hana_install_fact_is_installed | d(false)
  block:

    - name: SAP HANA Checks - Get info about the ID of the 'sapsys' group
      ansible.builtin.command: getent group sapsys
      check_mode: no
      register: __sap_hana_install_register_getent_group_sapsys
      changed_when: no
      failed_when: no

    - name: SAP HANA Checks - In case there is a group 'sapsys', assert that its group ID is identical to 'sap_hana_install_groupid'
      ansible.builtin.assert:
        that: "{{ __sap_hana_install_register_getent_group_sapsys.stdout.split(':')[2] }} == {{ sap_hana_install_groupid }}"
        success_msg: "PASS: The group ID of 'sapsys' is identical to the value of variable
                      sap_hana_install_groupid, which is '{{ sap_hana_install_groupid }}'"
        fail_msg: "FAIL: Group 'sapsys' exists but with a different group ID than '{{ sap_hana_install_groupid }}'
                   (specified in variable sap_hana_install_groupid)!"
      when: __sap_hana_install_register_getent_group_sapsys.rc == 0