如何使用ansible设置mongodb副本集

需要在3个实例中设置mongo dB副本集，其中一个是主实例，其余两个是辅助实例。 任何人都可以建议我如何写剧本

已在三台服务器中启动mongo shell并启动复制名称

''复制：

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replSetName:“testingrs”''

Ansible已经为其提供了插件：

当我部署MongoDB分片集群时，该插件仍然是1.0版，有很多限制。我们在安装pymongo时也遇到了一些问题，所以我手动开发了这些任务。然而，我认为在当前版本中，不再需要自己编写任务

总之，我的剧本是这样的：

- name: Check if Replicaset is already initialized
  shell: 
    cmd: "/usr/bin/mongo --norc --quiet localhost:{{ ports.config }}"
    executable: /bin/bash
    stdin: "rs.status().codeName" 
  register: result
  changed_when: false
  check_mode: no

- set_fact:
    rs_initiate: |      
      {% set members = [] %}
      {% for host in groups['config'] | sort %}
      {% set m = {'_id': loop.index0 } %}
      {% set _ = m.update({'host': host + '.' + domain + ':' + ports.config | string }) %}
      {% set _ = members.append(m) %}
      {% endfor %}
      {% set init = {'_id': replica_set.conf} %}
      {% set _ = init.update({'members': members}) %}
      {{ init }} 
    rs: |
      {% set i = (result.stdout == 'NotYetInitialized') %}
      {% for host in ansible_play_hosts %}
      {% set i = i and (hostvars[host].result.stdout == 'NotYetInitialized') %}
      {% endfor %}
      {{ {'NotYetInitialized': i} }}

- name: Init Replicaset
  shell: 
    cmd: "/usr/bin/mongo --norc --quiet localhost:{{ ports.config }}"
    executable: /bin/bash
    stdin: |
      rs.initiate({{ rs_initiate | to_json }})
      rs.status()
      while (! db.isMaster().ismaster ) sleep(1000) 
  when: rs.NotYetInitialized and inventory_hostname_short == (groups['config'] | sort | first) 

我遇到的一个问题是身份验证，因为当您从头开始部署MongoDB时，就不存在任何用户。因此，当您希望多次运行playbook时，必须区分有无身份验证

我的剧本包含以下任务：

  - name: Check if authentication is enabled
    shell: 
      cmd: "/usr/bin/mongo --norc --quiet localhost:{{ ports.router }}"
      executable: /bin/bash
      stdin: "rs.status().codeName" 
    register: result
    ignore_errors: yes
    changed_when: false
    when: inventory_hostname_short == (groups['application'] | sort | first)

  - name: Authenticate if needed
    set_fact:
      authenticate: "{{ (result.stdout == 'Unauthorized') | ternary('-u admin -p ' + password[env].admin + ' --authenticationDatabase admin','') }}"
    when: inventory_hostname_short == (groups['application'] | sort | first)

  - name: Create users
    shell: 
      cmd: "/usr/bin/mongo {{ authenticate }} --norc --quiet localhost:{{ ports.router }}"
      executable: /bin/bash
      stdin: |
        admin = db.getSiblingDB("admin")
        admin.createUser({ user: "admin", pwd: "{{ password[env].admin }}", roles: ["root"] })
        admin.auth("admin", "{{ password[env].admin }}")
        // create more users if needed
        admin.createUser(...)
    when: inventory_hostname_short == (groups['application'] | sort | first)

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你只需要发起一次。