Question

我在AWS中使用多个ec2实例并在这些实例上安装cassandra。我在cassandra文件中动态更新这些实例的IP地址。

我尝试使用set facts模块在不同的播放之间传递变量，它正在更新所有文件中由三个ec2实例构建的最后一台机器的ip地址。我的用例是更新文件中关于该ec2实例的IP地址。

###########################################################
Here is my playbook which consists of two plays:
#### Play1 - to spin 3 ec2 instances in AWS##########
- name: Play1
  hosts: local
  connection: local
  gather_facts: True
  vars:
    key_location: "path to pem file location"
    server_name: dbservers
    private_ip: item.private_ip
  tasks:
    - name: create ec2 instance
      ec2:
        key_name: {{ my_key_name}}
        region: us-east-1
        instance_type: t2.micro
        image: ami-8fcee4e5
        wait: yes
        group: {{ my_security_group_name}}
        count: 3 
        vpc_subnet_id: {{ my_subnet_id }}
        instance_tags:
          Name: devops-i-cassandra1-d-1c-common
          Stack: Ansible
          Owner: devops
      register: ec2

    - name: set facts ##  to capture the ip addresses of the ec2 instances, but only last ip is being captured
      set_fact:
        one_fact={{ item.private_ip }}
      with_items: ec2.instances

    - name: debugging private ip value
      debug: var=one_fact

    - name: Add the newly created EC2 instance(s) to the dbservers group in the inventory file
      local_action: lineinfile
                    dest="/home/admin/hosts"
                    regexp={{ item.private_ip }}
                    insertafter="[dbservers]" line={{ item.private_ip }}
      with_items: ec2.instances
    - name: Create Host Group to login dynamically to EC2 Instance
      add_host:
        hostname={{ item.private_ip }}
        groupname={{ server_name }}
        ansible_ssh_private_key_file={{ key_location }}
        ansible_ssh_user=ec2-user
        ec2_id={{ item.id }}
      with_items: ec2.instances

    - name: Wait for SSH to come up
      local_action: wait_for
                    host={{ item.private_ip }}
                    port=22
                    delay=60
                    timeout=360
                    state=started
      with_items: ec2.instances

####################Play2-Installing and Configuring Cassandra on Ec2 Instances
- name: Play2
  hosts: dbservers
  remote_user: ec2-user
  sudo: yes
  vars:
    private_ip: "{{ hostvars.localhost.one_fact }}"
  vars_files:
    - ["/home/admin/vars/var.yml"]
  tasks:
    - name: invoke a shell script to install cassandra
      script: /home/admin/cassandra.sh creates=/home/ec2-user/cassandra.sh

    - name: configure cassandra.yaml file
      template: src=/home/admin/cassandra.yaml dest=/etc/dse/cassandra/cassandra.yaml owner=ec2-user group=ec2-user mode=755

＃

提前致谢

Answer 1

使用ansible 2.0+，您可以刷新剧本中间的动态库存，如下所示：

- meta: refresh_inventory

要扩展一下，如果你的剧本中的缓存出现问题，那么你可以像这样使用它：

   - name: Refresh the ec2.py cache
     shell: "./inventory/ec2.py --refresh-cache"
     changed_when: no

   - name: Refresh inventory
     meta: refresh_inventory

其中./inventory是动态广告资源的路径，请相应调整。

在创建EC2实例期间，您已向其添加了标记，您现在可以使用动态清单来配置这些实例。你的第二场比赛将是这样的：

- name: Play2
  hosts: tag_Name_devops-i-cassandra1-d-1c-common
  remote_user: ec2-user
  sudo: yes
  tasks:
   - name: ---------

希望这会对你有所帮助。

使用Ansible更新cassandra文件中的动态变量（ip＆＃39; s），同时在AWS中启动多个ec2实例

1 个答案: