计算机网络 网站开发与设计app优化方案

Palybook组层部分

- name: first play
#一个name就是一个任务名，名字可以不写，gather_facts: false
#是否收集目标主机的系统信息，false就是不收集,最好不写。hosts: 192.168.233.12
#执行的目标主机remote_user: root
#在目标主机执行的用户tasks:- name: ping testping:- name: close selinuxcommand: '/sbin/setenforce 0'ignore_errors: True- name: close firewalldservice: name=firewalld state=stopped- name: install httpdyum: name=httpd- name: start httpdservice: enabled=true name=httpd state=started- name: editon index.htmlshell: echo "this is httpd" > /var/www/html/index.htmlnotify: restart httpdhandlers:- name: restart httpdservice: name=httpd state=restarted[root@docker1 opt]# ansible-playbook test1.yaml --syntax-check
#检查配置文件是否有错误
[root@docker1 opt]# ansible-playbook test1.yaml --list-task
#检查生效的目标主机
[root@docker1 opt]# ansible-playbook test1.yaml
#运行剧本文件
[root@docker1 opt]# ansible-playbook test1.yaml --start-at-task='install httpd'
#指定运行剧本第几行如需要切换用户在配置文件中写入
remote_user: dn
become: yes
become_ser: root
vim /etc/ansible/ansible.cfg
71行取消注释
vim /etc/ansible/hosts
[dbservers]
192.168.233.12 ansible_user=root ansible_password=123
需要声明ip地址与主机名ansible-playbook test1.yaml -u root -k
#密码需要手动输入

- hosts: 192.168.233.12remote_user: rootvars:groupname: guoqiusername: wangdefutasks:- name: create groupgroup:name: "{{ groupname }}"system: yesgid: 111- name: create useruser:name: "{{ username }}"uid: 1011group: "{{ groupname }}"shell: /sbin/nologin- name: copy filecopy:content: "{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address']}}"dest: /opt/ky32.txt
#获取目标主机的ip地址，然后打印出来，这里是否获取主机的信息否被删除掉，如果无法获取主机的信息，就会报错
[root@docker1 opt]# ansible-playbook test2.yaml -e 'username=yst groupname=ymr'
#在外面传参

playbook的条件判断
when是一个比较常见的应用场景，实现满足条件即执行，不满足条件即跳过的任务
when是满足条件即执行，不满足不执行格式
- hosts: 192.168.233.12
#可以用主机的ip地址，也可以是用组名，也可以用allremote_user: roottasks:- name: test whendebug:msg: '位置判断'when: ansible_default_ipv4.address == '192.168.233.20'#when: inventory_hostname !== '192.168.233.20'
#作用相同
#debug=echo  msg=输出的内容，用于脚本的调试，在正式脚本中可以去除练习
条件1 ip=10安装nginx ，条件2 ip=20安装httpd
版本1- hosts: allremote_user: roottasks:- name: nginxyum: name=nginxwhen: ansible_default_ipv4.address == '192.168.233.12'- name: httpdyum: name=httpdwhen: ansible_default_ipv4.address == '192.168.233.13'版本2- hosts: allremote_user: roottasks:- name: nginxyum: name=nginx- name: nginx ifodebug:msg: "安装nginx"when: ansible_default_ipv4.address == '192.168.233.12'- name: httpdyum: name=httpd- name: httpd infodebug:msy: "安装httpd"when: ansible_default_ipv4.address == '192.168.233.13'

ansible有多种循环格式，with_items 循环遍历
- hosts: 192.168.233.12remote_user: rootgather_facts: falsetasks:- debug:msg: "{{ item }}"with_items: [a,b,c,d]
#声明变量item,playbook的内置变量，with_item,会把item的值，遍历列表当中的a,b,c,d- hosts: 192.168.233.12remote_user: rootgather_facts: falsetasks:- debug:msg: "{{ item }}"with_items:- [a,b,c,d]- [1,2,3,4]
#这里会被当成一个整体，虽然声明的列表是两个，但是wiith——items还是把两个列表当成整体进行遍历- hosts: 192.168.233.12remote_user: rootgather_facts: falsetasks:- debug:msg: "{{ item }}"with_list:- [a,b,c,d]- [1,2,3,4]
#这里会被分组打印，一个列表打印一组- hosts: 192.168.233.12remote_user: rootgather_facts: falsetasks:- name: create filefile:path: "{{ item }}"state: touchwith_items:- [/opt/a,/opt/b,/opt/c,/opt/d]- [/opt/1,/opt/2,/opt/3,/opt/4]
#分组创建文件- hosts: 192.168.233.12remote_user: rootgather_facts: falsetasks:- debug:msg: "{{ item }}"with_together:- [a,b,c,d]- [1,2,3,4]
#组合输出，一一对应，列表组循环，如果没有组合会输出null
#列表里面的元素定义了循环的次数，第二层列表，相当于内循环
with_items：最常用的
with_list：列别分组循环
with_together：列表对应的列，数据结合的方式循环
with_nested：相当于双层循环，第一层定义了循环的次数，第二层表示第一次的每个元素会循环几次

#基于循环，创建文件，目录，和用户组
- name: play1hosts: 192.168.233.12gather_facts: falsetasks:- name: create groupgroup:name: "{{ item }}"state: presentwith_items:- 'dn1'- 'dn2'- name: create useruser:name: "{{ item.name }}"state: presentgroups: "{{ item.groups }}"with_items:- {name: 'test1', groups: 'dn1'}- {name: 'test2', groups: 'dn2'}

yum 一键安装多个软件  tree sl nginx httpd vsftpd dhcp- name: play2hosts: 192.168.233.12gather_facts: falsetasks:- name: create tree sl nginx httpd vsftpd dhcpyum:name: "{{ item }}"with_list:- tree- sl- nginx- httpd- vsftpd- dhcp