ansible条件模板

Question

我想有一个简单的，如果在ansibles神社模板else条件。对于普通的Python

cluster_name+'A' if isCondition is True else cluster_name +'B' 

wors巨大的，如果下面的变量定义：

isSingleNode = True 
cluster_name = 'example' 

在ansible我看到下列错误：

fatal: [localhost]: FAILED! => {"changed": false, "failed": true, "msg": "AnsibleError: template error while templating string: no test named 'True'. String: {\n\n \"key\" : \"{{ groups[cluster_name+'_mn01' if isSingleNode is True else cluster_name + '_mn02'] }}\"\n}\n"} 

下面是一个小例子：

file_1：变量

--- 
isCondition: True 

file_2：playbook.yml

--- 
- hosts: all 
    tasks: 
    - include_vars: variables 
    - debug: msg=" condition is {{ isCondition }} with cluster_name {{ cluster_name }}" 

    - name: copy file 
     template: src="bare_cluster.bp.j2" dest={{ cluster_name }}_blueprint.json backup=yes 

file_4：库存

[examplecluster:children] 
examplecluster_mn01 

[mn01:children] 
examplecluster_mn01 

[examplecluster_mn01] 
localhost ansible_connection=local 

file_5：bare_cluster.bp.j2

{ 

    "key" : "{{ groups[cluster_name+'_mn01' if isSingleNode is True else cluster_name + '_mn02'] }}" 
} 

命令来执行最小的例子是ansible-playbook -i inventory playbook.yml -e 'cluster_name=examplecluster'

Answer 1

你试过了吗？

{% if isCondition %} {{ cluster_name }} A {% else %} {{ cluster_name }} B {% endif %}