Ansible 如何从不同的任务文件中引用变量

Question

我希望能够从文件 create-public-sunbet 中引用文件 create-public-vpc 注册的变量 vpc_info

/etc/ansible/roles/ec2/tasks/main.yml

# tasks file for ec2-provision

- name:
  import_tasks: create-vpc.yml
  import_tasks: create-public-subnet.yml

/etc/ansible/roles/ec2/vars/main.yml

---
# vars file for ec2-provision

################################### designate python interpreter  ########################

ansible_python_interpreter: /usr/local/bin/python3.8


############################## VPC INFO #########################################
vpc_name: "My VPC"
vpc_cidr_block: "10.0.0.0/16"
aws_region: "us-east-1"


################################### VPC Subnet ###############################################
aws_zone: "us-east-1a"
# Subnets
vpc_public_subnet_cidr: "10.0.0.0/24"

# Subnet
vpc_private_subnet_cidr: "10.0.1.0/24"

创建-vpc.yml

- name: Create AWS VPC
  ec2_vpc_net:  
    name: "{{ vpc_name }}"
    cidr_block: "{{ vpc_cidr_block }}"
    region: "{{ aws_region }}"
    aws_access_key: "{{ access_key }}"
    aws_secret_key: "{{ secret_key }}"
    state: present
  register: vpc_info    

- name: Set vpc_info as fact
  set_fact: 
    vpc_info_fact: "{{ vpc_info }}"

创建-public-sunbet.yml

- name:  print vpc_info_fact
  debug:
    msg: "{{ hostvars['localhost']['vpc_info_fact'] }}"


- name: Create Public Subnet in VPC 
  ec2_vpc_subnet:
    vpc_id: "{{ vpc_info['vpc']['id'] }}"
    cidr: "{{ vpc_public_subnet_cidr }}"
    region: "{{ aws_region }}"
    az: "{{ aws_zone }}" 
    aws_access_key: "{{ access_key }}"
    aws_secret_key: "{{ secret_key }}"
    state: present
    tags:
      Name: Public Subnet
  register: public_subnet_info

当我运行ansible-playbookec2-provision.yml时，报错信息如下：

[root@VM-0-14-centos tasks]# ansible-playbook ec2-provision.yml 
[WARNING]: While constructing a mapping from /etc/ansible/roles/EC2/tasks/main.yml, line 4, column 3, found a duplicate dict key (import_tasks). Using last defined value
only.

PLAY [localhost] ************************************************************************************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************************************************
ok: [localhost]

TASK [EC2 : print vpc_info_fact] ********************************************************************************************************************************************
fatal: [localhost]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'vpc_info_fact' is undefined\n\nThe error appears to be in '/etc/ansible/roles/EC2/tasks/create-public-subnet.yml': line 3, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name:  print vpc_info_fact\n  ^ here\n"}

PLAY RECAP ******************************************************************************************************************************************************************
localhost                  : ok=1    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0  

Answer 1

创建变量后，尝试将 variable 值设置为 fact，然后您将通过 访问相应的 fact >主机变量。

例如：

- name: Create AWS VPC
  ec2_vpc_net:  
     name: "{{ vpc_name }}"
     cidr_block: "{{ vpc_cidr_block }}"
     region: "{{ aws_region }}"
     aws_access_key: "{{ access_key }}"
     aws_secret_key: "{{ secret_key }}"
     state: present
  register: vpc_info  

- name: Set vpc_info as fact
  set_fact: vpc_info_fact="{{ vpc_info }}"

要从不同的文件访问它，我们有以下任务：

- name: Create Public Subnet in VPC 
  ec2_vpc_subnet:
     vpc_id: "{{ hostvars['localhost']['vpc_info']['vpc']['id'] }}"
     cidr: "{{ vpc_public_subnet_cidr }}"
     region: "{{ aws_region }}"
     az: "{{ aws_zone }}" 
     aws_access_key: "{{ access_key }}"
     aws_secret_key: "{{ secret_key }}"
     state: present
     tags:
        Name: Public Subnet
  register: public_subnet_info