ansible使用 以及ansible批量部署tomcat+jdk

group模块参数：
name参数：必须参数，用于指定组名称。
state参数：用于指定组的状态，两个值可选，present，absent，默认为 present，设置为absent 表示删除组。
gid参数：用于指定组的gid。如果不指定为随机
system参数:如果是yes为系统组。–可选
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1.创建多个play

[root@ansible ~]# cd /etc/ansible/
[root@ansible ansible]# vim play.yml
- hosts: webservers1
  user: root
  tasks:
  - name: create a group
    group: name=mygrp gid=2003 system=true
  - name: create a user
    user: name=tom group=mygrp system=true
- hosts: webservers2
  user: root
  tasks:
  - name: install apache
    yum: name=httpd state=latest
  - name: start httpd service
    service: name=httpd state=started

检查并执行

[root@ansible ansible]# ansible-playbook --syntax-check play.yml
[root@ansible ansible]# ansible-playbook play.yml

2.条件执行when模块
先判断when条件是否成立

[root@ansible ansible]# cat /etc/ansible/hosts
[webservers1]
ansible-web1
ansible-web2
[root@ansible ansible]# vim when.yml
- hosts: webservers1
  user: root
  tasks:
  - name: use when
    file: state=touch path=/tmp/when.txt
  - name: insert data
    shell: echo 123 >> /tmp/when.txt          #2在执行这个模块命令
    when: ansible_hostname == "ansible-web1"  #1.先条件执行，先判断when是否成立，如果成立则执行上面命令,ansible-web1指的是被控节点上真正的主机名称

执行

[root@ansible ansible]# ansible-playbook when.yml
[root@ansible-web1 ~]# cat /tmp/when.txt 
123
[root@ansible-web2 ~]# cat /tmp/when.txt

3.使用变量并不显示搜集主机相关信息
gather_facts参数：指定了在任务部分执行前，是否先执行setup模块获取主机相关信息，默认值为true，改成false之后在执行过程中不会搜集主机相关信息。

[root@ansible ansible]# vim create_user.yml
- hosts: ansible-web1
  user: root
  gather_facts: false  #是否执行setup模块，搜集对方机器的信息
  vars:                #自定义变量
  - user: "jack"       #user是自定义变量名称，“jack”是变量值
  - src_path: "/root/a.txt"    #同上
  - dest_path: "/mnt/"
  tasks:
  - name: create user
    user: name={{ user }}
  - name: copy file
    copy: src={{ src_path }} dest={{ dest_path }}
[root@ansible ansible]# vim /root/a.txt  #创建测试文件
123

执行：

[root@ansible ansible]# ansible-playbook create_user.yml

项目实战：通过ansible 批量部署Jdk+Tomcat

[root@ansible-server src]# cat tomcat.yml 
- hosts: webservers
  user: root
  tasks:
  - name: configure Jdk1.8
    copy: src=/usr/src/jdk-8u211-linux-x64.tar.gz  dest=/usr/src
  - name: unzip
    shell: tar -xvzf /usr/src/jdk-8u211-linux-x64.tar.gz -C /usr/local
  - name: rename to java
    shell: mv /usr/local/jdk1.8.0_211 /usr/local/java
  - name: configure envirement1
    shell: echo "JAVA_HOME=/usr/local/java" >> /etc/profile
  - name: configure envirement2
    shell: echo 'PATH=$JAVA_HOME/bin:$PATH' >> /etc/profile
  - name: copy tomcat
    copy: src=/usr/src/apache-tomcat-8.5.45.tar.gz dest=/usr/src
  - name: unzip tomcat
    shell: tar -xvzf /usr/src/apache-tomcat-8.5.45.tar.gz -C /usr/local
  - name: rename to tomcat
    shell: mv /usr/local/apache-tomcat-8.5.45 /usr/local/tomcat
  - name: copy startup file
    copy:  src=/usr/src/startup.sh dest=/usr/local/tomcat/bin
    notify: start tomcat
  handlers:
  - name: start tomcat
    shell: nohup /usr/local/tomcat/bin/startup.sh &
[root@java-server src]# ls
apache-tomcat-8.5.45         debug                       kernels     tomcat.retry
apache-tomcat-8.5.45.tar.gz  jdk-8u211-linux-x64.tar.gz  startup.sh  tomcat.yml
[root@java-server src]# head -2 startup.sh 
#!/bin/sh
source /etc/profile