9.9 条件判断:when when相当于shell脚本里的if 判断,when语句就是用来实现这个功能的,它是一个jinja2的语法,但是不需要双大括号,用法很简单。 运算比较符有:==、!=、>、<、>=、<=、and、or、not、()、in等 9.9.1 判断目录或文件是否存在:exists #exists关键字,注意检查的是ansible主机。is not exists表示...
msg: "Variable is defined" when: testvar is defined - debug: msg: "Variable is undefined" when: testvar2 is undefined - debug: msg: "The variable is defined, but there is no value" when: testvar1 is none 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. ...
vars/:此目录中至少应该有一个名为main.yml的文件,用于定义各variable;其它的文件需要由main.yml进行“包含”调用; templates/:存储由template模块调用的模板文本; meta/:此目录中至少应该有一个名为main.yml的文件,定义当前角色的特殊设定及其依赖关系;其它的文件需要由main.yml进行“包含”调用; default/:此目录中...
10 shell 模块 ansible中的shell模块可以在被管理主机上运行命令,并支持像管道符号等功能的复杂命令。 [root@promote ~]# ansible-doc -s shell - name: Execute commands in nodes. shell: chdir: # cd into this directory before running the command creates: # a filename, when it already exists, this...
- name: Execute task only if file exists stat: path: /path/to/file register: file_status when: file_status.stat.exists - name: Execute task only if file does not exist stat: path: /path/to/file register: file_status when: not file_status.stat.exists ...
$ ansible-i hosts.yaml master-a"echo {{ ntp_server }}"master-node|FAILED|rc=-1>>The task includes an optionwithanundefinedvariable.The error was:'ntp_server'isundefined.'ntp_server'isundefined$ ansible-i hosts.yaml nodes-a"echo {{ ntp_server }}"node-1|CHANGED|rc=0>>9.1.1.1 ...
{}# initial error check, to make sure all specified playbooks are accessible# before we start running anything through the playbook executorb_playbook_dirs=[]forplaybookincontext.CLIARGS['args']:ifnotos.path.exists(playbook):raiseAnsibleError("the playbook: %s could not be found"%playbook)if...
creates # a filename or (since 2.0) glob pattern, when it already exists,this step will *not* be run. 例: ]# ansible 172.17.101.31 -m command -a 'date' …… ]# ansible websrvs -a 'date' …… ]# ansible all -a 'date' #all指inventory中定义的所有主机;...
variable_manager.set_inventory(inventory) # 设置密码,需要是dict类型 passwords=dict(conn_pass='your password') # 初始化需要的对象 Options = namedtuple('Options', ['connection', 'remote_user', 'ask_sudo_pass', 'verbosity', 'ack_pass', ...
Whenuse_unsafe_shell=Falsethis argument dictates whether~is expanded in paths and environment variables are expanded before running the command. WhenTruea string such as$SHELLwill be expanded regardless of escaping. WhenFalseanduse_unsafe_shell=Falseno path or variable expansion will be done. ...