# 02b\_\_create\_mongodb\_cluster.yml.md

The source files for this tutorial can be downloaded from its [GitHub repository](https://github.com/ionos-cloud/module-ansible/tree/master/docs/), or cloned into your current working directory using the command `git clone https://github.com/ionos-cloud/module-ansible.git` before changing into the `module-ansible/docs/tutorials/09__a_quick_introduction_to_dbaas` sub-directory.

{% code title="01\_\_create\_jumpbox\_and\_nlb.yml" overflow="wrap" lineNumbers="true" %}

```
- name: Set the fact 'internal_lan' based on the above
  ansible.builtin.set_fact:
    internal_lan: "{{ (lan_info_response | json_query(query))[0] }}"
  vars:
    query: "lans[?properties.name=='{{ lan.name }}']"


- name: Get information about our reserved IP Blocks
  ionoscloudsdk.ionoscloud.ipblock_info:
    filters: "{ 'properties.name': 'IP Block for {{ datacenter_name }}' }"
  register: ipblock_info_response
  when: ENABLE_EXPLICITLY_UNSUPPORTED_CONFIGURATIONS


- name: Set 'ip_block' based on the above
  ansible.builtin.set_fact:
    ip_block: "{{ ipblock_info_response.ipblocks[0].properties.ips }}"
  when: ENABLE_EXPLICITLY_UNSUPPORTED_CONFIGURATIONS


- name: Get information about the servers in our data center
  ionoscloudsdk.ionoscloud.server_info:
    datacenter: "{{ datacenter_name }}"
    depth: 5
  register: get_server_response


- name: Retrieve the object describing the jumpbox
  ansible.builtin.set_fact:
    desired_server_info__query: "{{ get_server_response | json_query(query) }}"
  vars:
    query: "servers[?properties.name=='{{ server_config['jumpbox'].name }}']"


- name: Retrieve the jumpbox's public IP
  ansible.builtin.set_fact:
    jumpbox_ip: "{{ (desired_server_info__query[0] | json_query(query))[0] }}"
  vars:
    query: "entities.nics.items[?properties.name!='{{ server_config['jumpbox'].name }}.eth1'].properties.ips[]"




# =======================================================================
# See https://docs.ionos.com/ansible/api/compute-engine/cube_template
- name: Retrieve the cluster template for '{{ dbaas_config.mongodb_cluster.template }}'
  ionoscloudsdk.ionoscloud.mongo_cluster_template_info:
    filters: "{ 'properties.name': '{{ dbaas_config.mongodb_cluster.template }}' }"
  register: template_list




# =======================================================================
# See https://docs.ionos.com/ansible/api/dbaas-mongo/mongo_cluster_template_info
- name: Create MongoDB Cluster
  ionoscloudsdk.ionoscloud.mongo_cluster:
    mongo_db_version: "{{ dbaas_config.mongodb_cluster.version }}"
    instances: 1
    template_id: "{{ template_list.mongo_cluster_templates[0].id }}"
    location: "{{ location }}"
    connections:
      - cidr_list: 
          - "{{ dbaas_config.mongodb_cluster.ip }}/24"
        datacenter: "{{ datacenter_name }}"
        lan: "{{ internal_lan.id }}"
    display_name: "MongoDB Cluster for {{ datacenter_name }}"

    wait: true
    wait_timeout: "{{ wait_timeout }}"
  register: mongodb_cluster_response    


- name: Extract MongoDB Cluster hostname
  ansible.builtin.set_fact:
    cluster_hostname: "{{ mongodb_cluster_response.mongo_cluster.properties.connection_string | regex_replace('^(.*)://(.*)$', '\\2') }}"


- name: Create Cluster User
  ionoscloudsdk.ionoscloud.mongo_cluster_user:
    mongo_cluster: "{{ mongodb_cluster_response.mongo_cluster.id }}"
    mongo_username: dbadmin
    mongo_password: "{{ default_password }}"
    user_roles:
      - role: readWrite
        database: test
  register: mongo_user_response




# =======================================================================
# Note that, instead of {{ dbaas_config.mongodb_cluster.ip }} in the SSH
# command below, one _could_ try to use the hostname contained in
# {{ mongodb_cluster_response.mongo_cluster.properties.connection_string }}
# but given that this uses the mongodb+srv protocol, one would need to
# first query the corresponding SRV record, then the hostname returned
# by said query. E.g.
# $ dig +short _mongodb._tcp.m-hq5v594hxxxxxxxx.mongodb.gb-lhr.ionos.com srv
# 10 1 27017 r1.m-hq5v594hxxxxxxxx.mongodb.gb-lhr.ionos.com.
# $ dig +short r1.m-hq5v594hxxxxxxxx.mongodb.gb-lhr.ionos.com
# 192.168.8.17
- name: Print usage information
  ansible.builtin.debug:
    msg:
      - "The MongoDB cluster {{ cluster_hostname }} has been created"
      - "To access it, use one of the following commands:"
      - "    From the jumpbox:"
      - "        mongosh {{ mongodb_cluster_response.mongo_cluster.properties.connection_string }} --username dbadmin"
      - "    Externally via the jumpbox:"
      - "        In one shell:     ssh -L 27017:{{ dbaas_config.mongodb_cluster.ip }}:27017 root@{{ jumpbox_ip }}"
      - "        In another shell: mongosh 'mongodb://dbadmin@localhost?tls=true&tlsAllowInvalidHostnames=true'"
      - "{% if ENABLE_EXPLICITLY_UNSUPPORTED_CONFIGURATIONS %}    Externally via the NLB:{% endif %}"
      - "{% if ENABLE_EXPLICITLY_UNSUPPORTED_CONFIGURATIONS %}        mongosh 'mongodb://dbadmin@{{ ip_block[0] }}?tls=true&tlsAllowInvalidHostnames=true'{% endif %}"
```

{% endcode %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.ionos.com/ansible/tutorials/09__a_quick_introduction_to_dbaas/02b__create_mongodb_cluster.yml.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.