获取目标主机的信息
ansible all -m setup -a "filter=ansible_os_family"
获取ip地址
# {{ ansible_eth0.ipv4.address }}
如：
CATALINA_OPTS="$CATALINA_OPTS
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.port=12345
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Djava.rmi.server.hostname={{ ansible_eth0.ipv4.address }}"
定义变量
---
- hosts: all
vars:
username: chentiangang
passwd: {{ ansible_eth0.ipv4.address }}
使用ip地址最后一段做my.cnf的server-id
- name: change my.cnf server-id
shell: server_id=`echo {{ ansible_eth0.ipv4.address }} | awk -F "." '{print $4}'` ; sed -i "s#server-id = 1#server-id = ${server_id}#g" /etc/my.cnf
不执行仅测试
ansible-playbook test.yml -C
安装一个zabbix-agent
---
- hosts: newserver
handlers:
- name: restart zabbix-agent
service: name=zabbix-agent state=restarted
tasks:
- name: install zabbix22-agent
yum: name={{ item }} state=latest
# -name: 删除zabbix-agent
# yum: name={{ item }} state=absent
with_items: zabbix22-agent
- name: template
template: src=/etc/ansible/roles/zabbix22-agent/templates/zabbix_agentd.conf dest=/etc/zabbix_agentd.conf owner=root group=root mode=0644
notify: restart zabbix-agent
when: ansible_os_family == "RedHat" and ansible_lsb.major_release == "7"
- name: start zabbix-agent
service: name=zabbix-agent state=started
检查语法
ansible-playbook main.yml --syntax-check
查看错误模块
ansible-playbook main.yml --verbose
要在运行之前查看哪些主机会受到影响，请执行以下操作：
ansible-playbook playbook.yml --list-hosts
正则
jinja中的正则
这边使用match和search关键字，匹配比较简单，用来when判断非常方便，直接贴一下官网代码和链接。
vars:
url: "http://example.com/users/foo/resources/bar"
tasks:
- debug: "msg='matched pattern 1'"
when: url | match("http://example.com/users/.*/resources/.*")
- debug: "msg='matched pattern 2'"
when: url | search("/users/.*/resources/.*")
- debug: "msg='matched pattern 3'"
when: url | search("/users/")
---
- hosts: tomcatservers
tasks:
- name: create dir
shell: hostname
when: ansible_hostname | search("inner-api")
指定远程连接端口
---
- hosts: ecAppB
port: 22
tasks:
- name: ping
ping:
首次连接不输yes的方法
打开/etc/ansible/ansible.cfg这一行的注释
默认情况下，首次登陆一台服务器，系统会提示是否要记住对端的指纹，用ansible也会这样，这样会导致需要手工输入yes或no，ansible 才可以往下执行。如需避免这种情况，需要在 /etc/ansible/ansible.cfg 文件中设置 host_key_checking = False
# uncomment this to disable SSH key host checking
host_key_checking = False
变量注册
---
- name: 注册变量
shell: hostname | sed -r 's#(.*)(-)([A-Z])([0-9])#1#g'
register: pkgname
# 通过切片取到最终想要的结果
- debug: "msg='{{ pkgname.stdout_lines[0] }}.war'"
执行的时候不获取主机信息（Gathering Facts）
---
- hosts: java*
gather_facts: no
roles:
- log/log-privileges
替换
- name: PMM | Fix nginx config
replace:
dest: /etc/nginx/nginx.conf
regexp: '^(s*)listen'
replace: '1#listen'