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目录
实战演练六:tags 模块
可以在一个playbook中为某个或某些任务定义“标签”,在执行此playbook时通过ansible-playbook命令使用--tags选项能实现仅运行指定的tasks。
playbook还提供了一个特殊的tags为always。作用就是当使用always作为tags的task时,无论执行哪一个tags时,定义有always的tags都会执行。
vim play5.yaml - name: five play remote_user: root hosts: dbservers gather_facts: true tasks: - name: copy file copy: src=/etc/hosts dest=/opt/ tags: - test - name: touch file file: path=/opt/myhosts state=touch tags: - only ansible-playbook play5.yaml --tags="test" #指定标签,只运行该标签下的任务
被控制节点查看opt目录下是否有hosts文件
vim play5.yaml - name: five play remote_user: root hosts: dbservers gather_facts: true tasks: - name: copy file copy: src=/etc/hosts dest=/opt/ tags: - test - name: touch file file: path=/opt/myhosts state=touch tags: - only - always ansible-playbook play5.yaml --tags="test" #当使用always作为tags的task时,无论执行哪一个tags时,定义有always的tags都会执行。
被控制节点查看
实战演练七:Templates 模块
Jinja是基于Python的模板引擎。Template类是Jinja的一个重要组件,可以看作是一个编译过的模板文件,用来产生目标文本,传递Python的变量给模板去替换模板中的标记。
cp /opt/httpd.conf ./httpd.conf.j2 先准备一个以 .j2 为后缀的 template 模板文件,设置引用的变量 vim httpd.conf.j2 Listen {{server_ip}}:{{http_port}} #42行 ServerName {{host_name}}:{{http_port}} #95行 vim /etc/ansible/hosts [webservers] 192.168.9.113 server_ip=192.168.9.113 http_port=8080 host_name=www.xy102.com 192.168.9.111 server_ip=192.168.9.111 http_port=8081 host_name=www.xy103.com
vim play1.yaml - name: first play gather_facts: false hosts: webservers remote_user: root tasks: - name: disable firewalld service: name=firewalld state=stopped enabled=no - name: disable selinux command: 'setenforce 0' ignore_errors: true - name: mount cdrom mount: src=/dev/sr0 path=/mnt fstype=iso9660 state=mounted - name: install httpd yum: name=httpd state=latest - name: copy config template file template: src=httpd.conf.j2 dest=/etc/httpd/conf/httpd.conf notify: "reload httpd" - name: start httpd service: name=httpd state=started enabled=yes handlers: - name: reload httpd service: name=httpd state=reloaded ansible-playbook play1.yaml
两个被控制节点查看42、95行是否修改成功