一种常见的方法是使用`default`过滤器。`default`过滤器可以在变量不存在或者值为空的情况下给变量设置默认值。例如,我们可以使用以下代码片段来给一个变量设置默认值: ```yaml - name: Set default value for variable hosts: localhost vars: my_variable: "{{ my_variable | de
Set Default Values for Variables in Ansible Another option is to set the default values for the variables using the Jinja’sdefaultfilter: "{{ some_variable | default('default_value') }}" This is often a better approach than failing if a variable is not defined. Passing in atrueas the ...
Cached Set Facts 是您通过 set_fact 动态设置并选择缓存的自定义变量 cached set_facts 指的是将获取到的变量缓存,可以与redis关联,或通过内置set_fact模块缓存变量,此配置较为复杂,不再详细描述 当前的文件里没有与facts相关的变量,facts变量有一个叫ansible_os_family的,会打印出操作系统名称,那么我使用第10个...
9.2.2 安装 EPEL 对于RHEL/CentOS系统,Ansible软件包位于EPEL(Extra Packages for Enterprise Linux)仓库中,因此需要先安装EPEL仓库。 CentOS/RHEL 7: bash sudo yum install epel-release sudo yum update CentOS/RHEL 8: bash sudo dnf install epel-release sudo dnf update 9.2.3 安装 Ansible 不同操作系统上...
task vars (only for the task) include_vars set_facts / registered vars role (and include_role) params include params extra vars (always win precedence) 变量定义 1.在 playbook 脚本中 vars 配置定义和调用 描述:下面在playbook 脚本中定义变量的几种格式: ...
在inventory文件中可以直接定义主机变量或主机组变量。 例如: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15# 在主机上直接定义变量[dev]192.168.200.42aaa=333bbb=444ansible_port=22192.168.200.43 192.168.200.44# 在主机组上定义变量[dev:vars]xxx=555yyy=666ansible_port=22# 也可以在特殊的主机组ungrouped...
block vars (only for tasks in block) task vars (only for the task) include_vars set_facts / registered vars role (and include_role) params include params extra vars (always win precedence) (1) vars 配置定义 (playbook) 在play中定义变量的几种形式: ...
Changes can be made and used in a configuration file which will be searched for in the following order:ANSIBLE_CONFIG (environment variable if set) ansible.cfg (in the current directory) ~/.ansible.cfg (in the home directory) /etc/ansible/ansible.cfg...
当调用变量作为key: value中的value时,也需要加上引号:key: "{{ VARIABLE_NAME }}" 调用变量名,则直接使用变量名,什么也不加:VARIABLE_NAME比如在Playbook中的某些模块中使用var参数来指定变量名:debug: var=VARIABLE_NAME Playbook中调用的变量有以下来源: ...
combine a variable name with a single value. You can use this syntax (and the syntax for lists and dictionaries shown below) in a variety of places. For details about setting variables in inventory, in playbooks, in reusable files, in roles, or at the command line, seeWhere to set ...