centos7安装ansible

落日映苍穹つ 2023-10-03 10:44 32阅读 0赞

## [Centos7安装ansible][Centos7_ansible] ##

**一、安装ansible软件**

1、安装yum源

rpm -Uvh http://mirrors.ustc.edu.cn/epel/epel-release-latest-7.noarch.rpm
    
    yum install epel-release -y
    
    yum install ansible

要是报错：epel源与python版本冲突原因，有些包是需要依赖python2.6的版本，此主机的python版本是2.7.5。

2、那就先卸载 epel-release源

yum  install  epel-release  -y

3、到 /etc/yum.repos.d 目录下，将epel.repo源备份，

mv  epel.repo  epel.repo.bak

4、清理yum源缓存和新建缓存，

yum clean all
    
     yum makecache

5、再执行安装命令

yum  install  ansible  -y

6、查看安装的版本

ansible --version

7、配置主机组

Ansible工具默认主目录为/etc/ansible/,其中hosts文件为被管理机IP或者主机名列

![img][]

**二、配置免秘钥登录**

1、管理主机上生成秘钥

ssh-keygen -t rsa
    
    Generating public/private rsa key pair.
    Enter file in which to save the key (/root/.ssh/id_rsa): 
    Enter passphrase (empty for no passphrase): 
    Enter same passphrase again: 
    Your identification has been saved in /root/.ssh/id_rsa.
    Your public key has been saved in /root/.ssh/id_rsa.pub.
    The key fingerprint is:
    73:80:07:fa:9a:0d:e0:0e:d1:c2:44:d2:d2:61:67:21 root@ansible
    The key's randomart image is:
    +--[ RSA 2048]----+
    |o=E.+..          |
    |=oo+ . o         |
    |ooo . . o        |
    | + . . . .       |
    |. . . . S .      |
    | o   =   o       |
    |  . o .          |
    |                 |
    |                 |
    +-----------------+

2、将管理机上生成的秘钥发送到被管理机

ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.207.137
    ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.207.132

3、测试是否配置成功

ansible -k all -m ping

**三、Ansible模块详细介绍**

1、Ansible command模块为Ansible默认模块，主要用于执行Linux基础命令，可以执行远程服务器命令执行、任务执行等操作。

![img][img 1]

ansible -k -i /etc/ansible/hosts web -m command -a "date"
    ansible -k all -m command -a "ping -c 1 www.baidu.com"
    ansible -k 192.168.207.137 -m command -a "df -h"                            指定单个IP执行任务

2、Ansible copy模块主要用于文件或者目录复制，支持文件、目录、权限、用户组功能。

![img][img 2]

ansible -k all -m copy -a 'src=/opt/test.txt dest=/tmp/ mode=755 owner=root'
    ansible -k all -m copy -a 'content="Hello World" dest=/tmp/jfedu.txt mode=755 owner=root'
    ansible -k all -m copy -a 'content="Hello World" dest=/tmp/xiaoxin.txt backup=yes mode=755 owner=root'

3、Ansible YUM模块主要用于软件的安装、升级、卸载，支持红帽rpm软件包的管理。

![img][img 3]

ansible all -k -m yum -a "name=xinetd,screen state=installed" 
    ansible all -k -m yum -a "name=sysstat,screen state=installed"          　　　　　　installed表示安装服务
    ansible all -k -m yum -a "name=sysstat,screen state=absent"             　　　　　　absent表示卸载服务
    ansible 192.168.207.137 -k -m yum -a "name=sysstat,screen state installed disable_gpg_check=no"   表示不检查key

如有报以下错：Cannot retrieve metalink for repository: epel/x86\_64. Please verify its path and try again

处理方法

编辑epel.repo, 去除epel段中baseurl行的注释符, 并注释metalink行

vim /etc/yum.repos.d/epel.repo
     
    [epel]
    name=Extra Packages for Enterprise Linux 7 - $basearch
    baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch
    #metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch
    failovermethod=priority
    enabled=1
    gpgcheck=1
    gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

4、Ansible file模块主要用于对文件的创建、删除、修改、权限、属性的维护和管理。

![img][img 4]

ansible -k 192.168.207.* -m file -a "path=/tmp/test state=directory mode=755"               创建目录
    ansible -k 192.168.207.* -m file -a "path=/tmp/abc.txt state=touch mode=755"                创建文件

5、Ansible user模块主要用于操作系统用户、组、权限、密码等操作

![img][img 5]

ansible -k 192.168.207.* -m user -a "name=jfedu home=/tmp/"                           home指定家目录
    ansible -k 192.168.207.* -m user -a "name=jfedu home=/tmp/ shell=/sbin/nologin"　　　　指定家目录，并指定shell
    ansible -k 192.168.207.* -m user -a "name=jfedu state=absent force=yes"               删除用户

6、Ansible cron模块主要用于添加、删除、更新操作系统crontab任务计划

![img][img 6]

ansible -k all -m cron -a "minute=0 hour=0 day=* month=* weekday=* name='Ntpdate server for sync time' job='/usr/sbin/ntpdate 139.224.227.121'"    定时同步时间
    ansible -k all -m cron -a "minute=* hour=* day=* month=* weekday=* name='Ntpdate server for sync time' backup=yes job='/usr/sbin/ntpdate pool.ntp.org'"   开启备份，备份目录在/tmp下
    ansible -k all -m cron -a "name='Ntpdate server for sync time' state=absent"              删除备份计划

7、Ansible synchronize模块主要用于目录、文件同步，主要基于rsync命令工具同步目录和文件。

![img][img 7]

![img][img 8]

ansible -k all -m synchronize -a 'src=/tmp/ dest=/tmp/'                  同步/tmp目录下的内容
    ansible -k all -m synchronize -a 'src=/tmp/ dest=/tmp/ compress=yes delete=yes rsync_opts=--no-motd,--exclude=.txt'

![img][img 9]

8、Ansible shell模块主要用于远程客户端上执行各种shell命令或者运行脚本，远程执行命令通过/bin/sh 环境来执行，支持比command更多的指令。

![img][img 10]

ansible -k all -m shell -a "/bin/sh /tmp/date.sh >>/tmp/var.log"               执行date.sh文件，并把执行结果追加到var.log文件里面去
    ansible -k all -m shell -a "mkdir -p abc chdir=/tmp/ state=directory warn=no"  创建目录
    ansible -k all -m shell -a "ps -ef |grep http"                                 远程查看http进程是否启动
    ansible -k all -m shell -a "crontab -l"                                        查看定时任务

9、Ansible service模块主要用于远程客户端各种服务管理，包括启动、停止、重启、重新加载等。

![img][img 11]

ansible -k all -m service -a "name=mysql state=restarted"               重启mysql服务
     ansible -k all -m service -a "name=network args=eth0  state=restarted"  重启网卡服务
     ansible -k all -m service -a "name=nfs enabled=yes runlevel=3.5"        远程开启nfs服务，设置3,5级别自动启动

10、Ansible PlayBook剧情模块

![img][img 12]

主要参数详解

![img][img 13]

![img][img 14]

ansible-playbook nginx_install.yaml
    nginx_install.yaml文件

---
    - hosts: all
      tasks:
        - name: Installs nginx web server
          yum: name=nginx state=installed update_cache=true
          notify:
            - start nginx
    
      handlers:
        - name: start nginx
          service: name=nginx state=started

执行结果：

![img][img 15]

[Centos7_ansible]: https://www.cnblogs.com/aqicheng/p/12973674.html
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