defaults_main.yml

#Check gist description on https://funinit.wordpress.com/2018/06/27/ansible-role-used-as-plugin-for-simple-rest-api-services/
icinga2_api_uri: https://your.host:your_port/v1/objects/services/
icinga2_api_user: XXX
icinga2_api_password: XXX
icinga2_validate_certs: no

example-playbook.yml

#Check gist description on https://funinit.wordpress.com/2018/06/27/ansible-role-used-as-plugin-for-simple-rest-api-services/
- hosts:
  - usinkok-acc01
  roles:
  - icinga2-service
  vars:
   service:
    name: TestService2
    state: present
    command: PassiveCheck

meta_main.yml

#Check gist description on https://funinit.wordpress.com/2018/06/27/ansible-role-used-as-plugin-for-simple-rest-api-services/
dependencies:
 - { role: icinga2-service, service: { state: present, command: PassiveCheck, name: TestService2}

tasks_main.yml

#Check gist description on https://funinit.wordpress.com/2018/06/27/ansible-role-used-as-plugin-for-simple-rest-api-services/
- name: fail if started with unsupported state
  fail: msg="service state has to be one present or deleted"
  when: service["state"] is not defined or service["state"] not in [ "present" , "deleted" ]

- name: get_information_about_service
  check_mode: no
  register: icinga2Service
  changed_when: false
  local_action:
        module: uri
        url: '{{icinga2_api_uri + ansible_hostname + "!" + service["name"]}}'
        method: GET
        force_basic_auth: yes
        user: '{{icinga2_api_user}}'
        password: '{{icinga2_api_password}}'
        validate_certs: '{{icinga2_validate_certs}}'
        status_code: 200,404

- name: create_service
  changed_when: true
  register: serviceCreated
  when: icinga2Service.status == 404 and  service["state"] == "present"
  local_action:
        module: uri
        url: '{{icinga2_api_uri + ansible_hostname + "!" + service["name"]}}'
        method: PUT
        body: '{"templates": [ "generic-service" ],
                "attrs": {
                                "display_name": "{{service["name"]}}",
                                "check_command" : "{{service["command"]}}",
                                "vars.critical": "0",
                                "check_interval": "{{service["check_interval"] | default(600)}}",
                                "host_name": "{{ansible_hostname}}"
                }
               }'
        body_format: json
        force_basic_auth: yes
        user: '{{icinga2_api_user}}'
        password: '{{icinga2_api_password}}'
        validate_certs: '{{icinga2_validate_certs}}'
        status_code: 200
        headers:
                Content-Type: "application/json"
                Accept: "application/json"

- name: update_service
  when: service["state"] == "present" and serviceCreated.skipped == true
  register: resultUpdate
  local_action:
        module: uri
        url: '{{icinga2_api_uri + ansible_hostname + "!" + service["name"]}}'
        method: POST
        body: '{"templates": [ "generic-service" ],
                "attrs": {
                                "display_name": "{{service["name"]}}",
                                "check_command" : "{{service["command"]}}",
                                "vars.critical": "0",
                                "check_interval": "{{service["check_interval"] | default(600)}}",
                                "host_name": "{{ansible_hostname}}"
                }
               }'
        body_format: json
        force_basic_auth: yes
        user: '{{icinga2_api_user}}'
        password: '{{icinga2_api_password}}'
        validate_certs: '{{icinga2_validate_certs}}'
        status_code: 200
        headers:
                Content-Type: "application/json"
                Accept: "application/json"

- name: delete_service
  changed_when: true
  register: result
  when: icinga2Service.status == 200 and service["state"] == "deleted"
  local_action:
        module: uri
        url: '{{icinga2_api_uri + ansible_hostname + "!" + service["name"]}}?cascade=1'
        method: DELETE
        force_basic_auth: yes
        user: '{{icinga2_api_user}}'
        password: '{{icinga2_api_password}}'
        validate_certs: '{{icinga2_validate_certs}}'
        status_code: 200
        headers:
                Content-Type: "application/json"
                Accept: "application/json"