Ansible Dynamic Inventory无法获取最新的ec2信息

时间:2015-02-27 22:28:54

标签: amazon-web-services amazon-ec2 ansible ansible-playbook ansible-inventory

我正在使用ec2.py动态广告资源进行ansible配置。 我已将ec2.py放在/etc/ansible/hosts文件中,并将其标记为可执行文件。 我在ec2.ini中也有/etc/ansible/hosts个文件。

[ec2]

regions = us-west-2
regions_exclude = us-gov-west-1,cn-north-1


destination_variable = public_dns_name

vpc_destination_variable = ip_address
route53 = False

all_instances = True
all_rds_instances = False


cache_path = ~/.ansible/tmp

cache_max_age = 0

nested_groups = False
group_by_instance_id = True
group_by_region = True
group_by_availability_zone = True
group_by_ami_id = True
group_by_instance_type = True
group_by_key_pair = True
group_by_vpc_id = True
group_by_security_group = True
group_by_tag_keys = True
group_by_tag_none = True
group_by_route53_names = True
group_by_rds_engine = True
group_by_rds_parameter_group = True

以上是我的ec2.ini文件

---
- hosts: localhost
  connection: local
  gather_facts: yes
  vars_files:
   - ../group_vars/dev_vpc
   - ../group_vars/dev_sg
   - ../hosts_vars/ec2_info
  vars:
    instance_type: t2.micro
  tasks:
   - name: Provisioning EC2 instance
     local_action:
     module: ec2
     region: "{{ region }}"
     key_name: "{{ key }}"
     instance_type: "{{ instance_type }}"
     image: "{{ ami_id }}"
     wait: yes
     group_id: ["{{ sg_npm }}", "{{sg_ssh}}"]
     vpc_subnet_id: "{{ PublicSubnet }}"
     source_dest_check: false
     instance_tags: '{"Name": "EC2", "Environment": "Development"}'
 register: ec2
  - name: associate new EIP for the instance
    local_action:
      module: ec2_eip
      region: "{{ region }}"
      instance_id: "{{ item.id }}"
      with_items: ec2.instances
  - name: Waiting for NPM Server to come-up
    local_action:
      module: wait_for
      host: "{{ ec2 }}"
      state: started
      delay: 5
      timeout: 200
 - include: ec2-configure.yml

现在配置脚本如下

- name: Configure EC2 server
  hosts: tag_Name_EC2
  user: ec2-user
  sudo: True
  gather_facts: True
  tasks:
   - name: Install nodejs related packages
     yum: name={{ item }} enablerepo=epel state=present
     with_items:
      - nodejs
      - npm

但是,在调用configure脚本时,第二个脚本会导致找不到主机。 如果我单独执行ec2-configure.yml并且如果EC2服务器已经启动&运行然后它能够​​找到并配置它。

我添加了wait_for以确保在调用ec2-configure.yml之前实例处于运行状态。

如果有人能指出我的错误,我将不胜感激。感谢

4 个答案:

答案 0 :(得分:6)

经过研究,我发现动态库存不会在剧本调用之间刷新,只有在您单独执行剧本时才会刷新。 但是,我能够使用add_host命令来解决问题。

- name: Add  Server to inventory
  local_action: add_host hostname={{ item.public_ip }} groupname=webserver
  with_items: webserver.instances

答案 1 :(得分:2)

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。

希望这会对你有所帮助。

答案 2 :(得分:0)

Configure EC2 server播放无法从EC2动态广告资源中找到任何主机,因为新实例是在播放手册的第一次播放中添加的 - 在同一次执行期间。在阅读广告资源时,小组tag_Name_EC2并不存在,因此无法找到。

再次运行相同的剧本时Configure EC2 server应该找到该组。

我们使用以下解决方法来指导用户处于这种情况。

首先,配置实例:

tasks:
  - name: Provisioning EC2 instance
    local_action:
    module: ec2
    ...
    register: ec2

然后在ec2-configure.yml之前添加新剧本。该剧使用ec2中注册的Provisioning EC2 instance变量,如果启动任何实例,将失败并退出该剧本:

- name: Stop and request a re-run if any instances were launched
  hosts: localhost
  gather_facts: no
  tasks:
    - name: Stop if instances were launched
      fail: msg="Re-run the playbook to load group variables from EC2 dynamic inventory for the just launched instances!"
      when: ec2.changed

- include: ec2-configure.yml 

答案 3 :(得分:0)

您还可以刷新缓存:

foobar/my-image:[branch]-latest

或者如果您使用Ansible主机文件:

ec2.py --refresh-cache