Jinja2的语法是由variables(变量)和statement(语句)组成,如下; 1、variables:可以输出数据 my_variables {{ some_dudes_name | capitalize }} 2、statements: 可以用来创建条件和循环等 if语句: {% if my_conditional %} ... {% endif %} for 语句: {%
3. 判断 Jinja2 中的判断使用{% if %}表示。例如: {% if condition %} {{ statement }} {% else %} {{ else_statement }} {% endif %} 1. 2. 3. 4. 5. 四、Jinja2 的实际应用 1. 动态生成 Nginx 配置文件 使用Jinja2 模板可以动态生成 Nginx 配置文件。例如: server { listen {{ port }}...
...Shell 有三种 if … else 语句: if … fi 语句; if … else … fi 语句; if … elif … else … fi 语句。...1) if … else 语句 if … else 语句的语法: if [ expression ] then Statement(s) to be executed if expression...= b ] then echo “a is not equal to b” fi 运行...
对于配置文件,可以通过Jinja2模板来实现。使用方式常用的有变量、for循环、if-else {% for item in all_items %) {{ item }} {% endfor %} 1. 2. 3. {% if PORT %} bind-address=0.0.0.0:{{ PORT }} {% else %} bind-address=0.0.0.0:3306 {% endif %} 1. 2. 3. 4. 5. SSH批量免...
Jinja2的语法是由variables(变量)和statement(语句)组成,如下; 1、variables:可以输出数据 ` my_variables ` {{ some_dudes_name | capitalize }} 2、statements: 可以用来创建条件和循环等 if语句: {% if my_conditional %} ... {% endif %}
Theelsestatement is similar to what you might know from other languages. In this case, I combinejob_namewith an underscore andcurrent_date_time. Finally, theendifcloses theif. As you can see, this is a little dangerous and can get messy. Use a good dose of common sense. ...
Jinja2的语法是由variables(变量)和statement(语句)组成,如下; 1、variables:可以输出数据 2、statements: 可以用来创建条件和循环等 从上面第二个variables的例子中可以看出,jinja2支持使用带过滤器的Unix型管道操作符,有很多的内置过滤器可供使用。我们可以仅仅用一堆简单if和for就可以建立几乎任何的常规配置文件,不过...
{% if PORT %} bind-address=0.0.0.0:{{ PORT }} {% else %} bind-address=0.0.0.0:3306 {% endif %} ansible-playbook mysqlconf.yaml PLAY [Mysql conf template] *** TASK [Gathering Facts] *** ok: [192.168.255.110] TASK [template] *** changed: [192.168...
statement. Database and table names can be quoted, MySQL-style. If column privileges are used, the `priv1,priv2' part must be exactly as returned by a `SHOW GRANT' statement. If not followed, the module will always report changes. It includes grouping columns by permission ...
Then the second task, which is to install httpd using yum module. Will first execute the when condition we have specified and see if it is TRUE. Therefore, If there is a "not found" error in the register variable. The HTTPD will be installed. If there is anything else. HTTPD will not...