02b__create_mongodb_cluster.yml.md

The source files for this tutorial can be downloaded from its GitHub repository, 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.

01__create_jumpbox_and_nlb.yml

- 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 %}"