ansible部署KeepAlived动态站点

一、设计原因

利用ansible可以自动化部署KeepAlived 的双方模型(其中包括两个动态的站点),多组服务器需要一样的部署时

可以利用ansible写的程序来代替重复性的操作。

二、设计拓扑结构及服务器详情

ansible部署KeepAlived动态站点

ansible部署KeepAlived动态站点 

三、详细步骤

1、环境的搭建

(1)安装ansible,同时配置私钥免密码进行通信

[root@localhost ~]# ssh-keygen  -t rsa #-t表示使用的加密类型,其中rsa1表示version1版本,rsa、dsa、ecdsa的加密对于的是version2版本
Generating public/private rsa key pair.
#这里询问你要把生成的密钥文件保存在哪里,默认是在家目录下的.ssh文件夹中,回车保存默认目录
Enter file in which to save the key (/root/.ssh/id_rsa): 
Created directory '/root/.ssh'.
#这里是对密钥文件加密,不输入则表示不加密
Enter passphrase (empty for no passphrase): 
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:
04:9f:cb:9c:9d:1e:47:d7:e1:d4:c1:87:71:c3:a4:22 root@localhost.localdomain
The key's randomart image is:
+--[ RSA 2048]----+
|      .       =O+|
|       o .    ===|
|        +E .....o|
|       + +.o..   |
|        S + .    |
|         . o     |
|          .      |
|                 |
|                 |
+-----------------+
–

(2)查看已经成功生成了一对密钥

[root@localhost ~]# ls /root/.ssh
id_rsa  id_rsa.pub#其中id_rsa为私钥,id_rsa.pub为公钥
–

(3)在生成完密钥对之后将公钥上传给服务器对应用户的家目录

[root@localhost ~]# ssh-copy-id -i .ssh/id_rsa.pub root@10.1.252.215
[root@localhost ~]# ssh-copy-id -i .ssh/id_rsa.pub root@10.1.252.235
[root@localhost ~]# ssh-copy-id -i .ssh/id_rsa.pub 10.1.253.107
[root@localhost ~]# ssh-copy-id -i .ssh/id_rsa.pub root@10.1.249.75
[root@localhost ~]# ssh-copy-id -i .ssh/id_rsa.pub root@10.1.249.75

(4)编辑ansible的hosts文件,定义后所有的主机

[19:05 root@centos6.8/etc/ansible]# cat hosts 
# This is the default ansible 'hosts' file.
#
# It should live in /etc/ansible/hosts
#
#   - Comments begin with the '#' character
#   - Blank lines are ignored
#   - Groups of hosts are delimited by [header] elements
#   - You can enter hostnames or ip addresses
#   - A hostname/ip can be a member of multiple groups

# Ex 1: Ungrouped hosts, specify before any group headers.
[web]
10.1.252.215
10.1.252.235
[nginx]
10.1.253.107 state=MASTER priority=100
10.1.249.75  state=BACKUP priority=90
[mysql]
10.1.252.36

OK,环境已经搭配好,所有主机同步下时间:

[19:34 root@centos6.8/etc/ansible]# ansible all -a 'ntpdate 10.1.0.1'
10.1.252.215 | success | rc=0 >>
 3 Nov 19:34:30 ntpdate[38293]: adjust time server 10.1.0.1 offset -0.003936 sec

10.1.252.36 | success | rc=0 >>
 3 Nov 19:34:30 ntpdate[3291]: adjust time server 10.1.0.1 offset 0.200434 sec

10.1.252.235 | success | rc=0 >>
 3 Nov 19:34:36 ntpdate[38723]: adjust time server 10.1.0.1 offset -0.001469 sec

10.1.253.107 | success | rc=0 >>
 3 Nov 19:34:37 ntpdate[7161]: adjust time server 10.1.0.1 offset -0.001905 sec

10.1.249.75 | success | rc=0 >>
 3 Nov 19:34:37 ntpdate[4951]: adjust time server 10.1.0.1 offset 0.018952 sec

2、下面来进行ansible的roles和playbook的定义:
在/etc/ansible/roles目录下创建相关的角色目录:

[19:56 root@centos6.8/etc/ansible/roles]# mkdir -pv {mysql,web,nginx}/{files,tasks,templates,variables,handlers,meta,defult}
mkdir: created directory `mysql'
mkdir: created directory `mysql/files'
mkdir: created directory `mysql/tasks'
mkdir: created directory `mysql/templates'
mkdir: created directory `mysql/variables'
mkdir: created directory `mysql/handlers'
mkdir: created directory `mysql/meta'
mkdir: created directory `mysql/default'
mkdir: created directory `web'
mkdir: created directory `web/files'
mkdir: created directory `web/tasks'
mkdir: created directory `web/templates'
mkdir: created directory `web/variables'
mkdir: created directory `web/handlers'
mkdir: created directory `web/meta'
mkdir: created directory `web/default'
mkdir: created directory `nginx'
mkdir: created directory `nginx/files'
mkdir: created directory `nginx/tasks'
mkdir: created directory `nginx/templates'
mkdir: created directory `nginx/variables'
mkdir: created directory `nginx/handlers'
mkdir: created directory `nginx/meta'
mkdir: created directory `nginx/default'
[19:58 root@centos6.8/etc/ansible/roles]# tree
.
├── mysql
│   ├── default
│   ├── files
│   ├── handlers
│   ├── meta
│   ├── tasks
│   ├── templates
│   └── variables
├── nginx
│   ├── default
│   ├── files
│   ├── handlers
│   ├── meta
│   ├── tasks
│   ├── templates
│   └── variables
└── web
    ├── default
    ├── files
    ├── handlers
    ├── meta
    ├── tasks
    ├── templates
    └── variables

24 directories, 0 files
  • 说明:
    files/:存储由copy或script等模块调用的文件;
    tasks/:此目录中至少应该有一个名为main.yml的文件,用于定义各task;其它的文件需要由main.yml进行“包含”调用;
    handlers/:此目录中至少应该有一个名为main.yml的文件,用于定义各handler;其它的文件需要由main.yml进行“包含”调用;
    vars/:此目录中至少应该有一个名为main.yml的文件,用于定义各variable;其它的文件需要由main.yml进行“包含”调用;
    templates/:存储由template模块调用的模板文本;
    meta/:此目录中至少应该有一个名为main.yml的文件,定义当前角色的特殊设定及其依赖关系;其它的文件需要由main.yml进行“包含”调用;
    default/:此目录中至少应该有一个名为main.yml的文件,用于设定默认变量;
    下面就是添加playbook了,首先设置web:

3、设置web的playbook

(1)Tasks:任务

[17:27 root@centos6.8/etc/ansible]# cat roles/web/tasks/main.yml 
- name: install web pakgs
  yum: name={{ item }}
  with_items:
  - httpd
  - php
  - php-mysql
- name: config the web
  copy: src=httpd.conf dest=/etc/httpd/conf/httpd.conf
  notify: reload the service
- name: install wordpress
  copy: src=wordpress dest=/var/www/html/wordpress/
- name: restart the service
  service: name=httpd state=started
        (2)添加触发器:handlers

(2)添加触发器:handlers

[20:26 root@centos6.8/etc/ansible]# cat roles/web/handlers/main.yml 
- name: relaod the service
  service: name=httpd state=restarted

(3)添加需要的file:

[18:45 root@centos6.8/etc/ansible]# ll roles/web/files/
total 40
-rw-r--r--. 1 root   root      34419 Nov  2 20:23 httpd.conf  #主要是配置httpd的默认配置,要事先准备好
drwxr-xr-x. 5 nobody nfsnobody  4096 Nov  3 14:00 wordpress   #wordpres的安装程序,注意这里的配置文件已经更改了后面的连接数据库
[18:58 root@centos6.8/etc/ansible]#vim  roles/web/files/wordpress/wp-config.php  #修改数据库信息,信息已经在后面的mysql剧本已经定义好了
/** WordPress数据库的名称 */
define('DB_NAME', 'wp');

/** MySQL数据库用户名 */
define('DB_USER', 'wpuser');

/** MySQL数据库密码 */
define('DB_PASSWORD', 'wppass');

/** MySQL主机 */
define('DB_HOST', '10.1.252.109');

/** 创建数据表时默认的文字编码 */
define('DB_CHARSET', 'utf8');

 (4)添加主剧本:

[20:28 root@centos6.8/etc/ansible]# ll web.yml 
-rw-r--r--. 1 root root 51 Nov  2 20:22 web.yml
[20:28 root@centos6.8/etc/ansible]# pwd
/etc/ansible
[20:28 root@centos6.8/etc/ansible]# cat web.yml 
- hosts: web
  remote_user: root
  roles:
  - web     

检查语法没有问题:

[20:25 root@centos6.8/etc/ansible]# ansible-playbook --syntax-check web.yml

playbook: web.yml

4、下面来部署前端的nginx调度起和keepalived配置:

(1)添加task任务:

[19:34 root@centos6.8/etc/ansible]# cat roles/nginx/tasks/main.yml 
- name: install keepalived
  yum: name=keepalived
- name: copy nginx
  copy: src=nginx-1.10.0-1.el7.ngx.x86_64.rpm dest=/tmp/nginx.rpm
- name: install nginx
  yum: name=/tmp/nginx.rpm
- name: delete the nginx pkg
  shell: "rm -f /tmp/nginx.rpm"
- name: config nginx&keepalived
  template: src=keepalived.j2 dest=/etc/keepalived/keepalived.conf
  notify: reload the service
- name: config nginx&keepalived
  template: src=nginx.j2 dest=/etc/nginx/nginx.conf
  notify: reload the service
- name: start the service
  service: name={{ item }} state=started 
  with_items:
  - keepalived
  - nginx

(2)添加handlers

[21:28 root@centos6.8/etc/ansible]#cat roles/nginx/handlers/mainx.yml 
- name: reload the service
  service: name={{ item }} state=restarted
  with_items:
  - nginx
  - keepalived
        (3)在hosts列表中复制变量:

(3)在hosts列表中复制变量:

[19:38 root@centos6.8/etc/ansible]# cat hosts 
# This is the default ansible 'hosts' file.
#
# It should live in /etc/ansible/hosts
#
#   - Comments begin with the '#' character
#   - Blank lines are ignored
#   - Groups of hosts are delimited by [header] elements
#   - You can enter hostnames or ip addresses
#   - A hostname/ip can be a member of multiple groups
# Ex 1: Ungrouped hosts, specify before any group headers.
[web]
10.1.252.215
10.1.252.235
[nginx]
10.1.253.107 state=MASTER priority=100
10.1.249.75  state=BACKUP priority=90
[mysql]
10.1.252.36

 (4)提供files文件:nginx的安装程序

[19:39 root@centos6.8/etc/ansible]# ll roles/nginx/files/
total 644
-rw-r--r--. 1 root root 655648 Apr 29  2016 nginx-1.10.0-1.el7.ngx.x86_64.rpm
        (5)在template中使用了变量:
nginx配置:

(5)在template中使用了变量:

[21:33 root@centos6.8/etc/ansible]# cat roles/nginx/templates/nginx.j2
user  nginx;
worker_processes  {{ ansible_processor_vcpus  }}; #使用变量,进程数为cpu数量:
error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
    access_log  /var/log/nginx/access.log  main;
    sendfile        on;
    #tcp_nopush     on;
    keepalive_timeout  65;
    #gzip  on;
    include /etc/nginx/conf.d/*.conf;
    upstream web {
    server 10.1.24.113;
    server 10.1.24.114;
 }
    location / {
    proxy_pass http://web;  
}
}

keepalived配置:

[21:33 root@centos6.8/etc/ansible]# cat roles/nginx/templates/keepalived.j2 
! Configuration File for keepalived
global_defs {
   notification_email {
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}
vrrp_instance VI_1 {
    state {{ state }}  #使用变量,变量在hosts中已经定义了
    interface eno16777746
    virtual_router_id 55
    priority {{ priority }} #使用变量,变量在hosts中已经定义了
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 232332
    }
    virtual_ipaddress {
        10.1.24.222
    }
}
        

(6)添加主剧本:

[21:30 root@centos6.8/etc/ansible]# cat nginx.yml 
- hosts: nginx
  remote_user: root
  roles:
  - nginx

 (7)语法检测没有问题

[21:34 root@centos6.8/etc/ansible]#ansible-playbook --syntax-check nginxx.yml
playbook: nginx.yml
5、设置mysql:
(1)设置mysql的task:
[18:46 root@centos6.8/etc/ansible]# cat roles/mysql/tasks/main.yml 
- name: install mysql
  yum: name=mysql-server
- name: copy sql file
  copy: src=mysql.sql dest=/tmp/mysql.sql
- name: start mysql service
  service: name=mysqld state=started
- name: config mysql
  shell: "mysql < /tmp/mysql.sql"
        (2)设置files文件
[18:47 root@centos6.8/etc/ansible]# ll roles/mysql/files/
total 4
-rw-r--r--. 1 root root 78 Nov  3 15:41 mysql.sql
[19:39 root@centos6.8/etc/ansible]# cat roles/mysql/files/mysql.sql #提供数据库的sql脚本,创建wordpres的用户和数据库
CREATE DATABASE wp;
GRANT ALL ON wp.* TO 'wpuser'@'%' IDENTIFIED BY 'wppass';
        (3)添加主剧本:
[18:48 root@centos6.8/etc/ansible]# cat mysql.yml 
- hosts: mysql
  remote_user: root
  roles:
  - mysql

 (8)语法检查没有问题:

[18:49 root@centos6.8/etc/ansible]# ansible-playbook --syntax-check mysql.yml
playbook: mysql.yml
        mysql的ansible配置已经完成

5、设置mysql:

(1)设置mysql的task:

[18:46 root@centos6.8/etc/ansible]# cat roles/mysql/tasks/main.yml 
- name: install mysql
  yum: name=mysql-server
- name: copy sql file
  copy: src=mysql.sql dest=/tmp/mysql.sql
- name: start mysql service
  service: name=mysqld state=started
- name: config mysql
  shell: "mysql < /tmp/mysql.sql"

(2)设置files文件

[18:47 root@centos6.8/etc/ansible]# ll roles/mysql/files/
total 4
-rw-r--r--. 1 root root 78 Nov  3 15:41 mysql.sql
[19:39 root@centos6.8/etc/ansible]# cat roles/mysql/files/mysql.sql #提供数据库的sql脚本,创建wordpres的用户和数据库
CREATE DATABASE wp;
GRANT ALL ON wp.* TO 'wpuser'@'%' IDENTIFIED BY 'wppass';

 (3)添加主剧本:

[18:48 root@centos6.8/etc/ansible]# cat mysql.yml 
- hosts: mysql
  remote_user: root
  roles:
  - mysql

 (4)语法检查没有问题:

[18:49 root@centos6.8/etc/ansible]# ansible-playbook --syntax-check mysql.yml 
playbook: mysql.yml
        mysql的ansible配置已经完成

6、至此,web、nginx+keepalived、mysql的配置都已经完成,下面来依次执行剧本

(1)来看下整个目录的结构:

[19:05 root@centos6.8/etc/ansible]# tree -L 4
.
├── ansible.cfg
├── ansible.cfg.bak
├── hosts
├── mysql.yml
├── nginx.yml
├── roles
│   ├── mysql
│   │   ├── default
│   │   ├── files
│   │   │   └── mysql.sql
│   │   ├── handlers
│   │   ├── meta
│   │   ├── tasks
│   │   │   └── main.yml
│   │   ├── templates
│   │   └── variables
│   ├── nginx
│   │   ├── default
│   │   ├── files
│   │   │   └── nginx-1.10.0-1.el7.ngx.x86_64.rpm
│   │   ├── handlers
│   │   │   └── main.yml
│   │   ├── meta
│   │   ├── tasks
│   │   │   └── main.yml
│   │   ├── templates
│   │   │   ├── keepalived.j2
│   │   │   └── nginx.j2
│   │   └── variables
│   └── web
│       ├── default
│       ├── files
│       │   ├── httpd.conf
│       │   └── wordpress
│       ├── handlers
│       │   └── main.yml
│       ├── meta
│       ├── tasks
│       │   └── main.yml
│       ├── templates
│       └── variables
├── test.yaml
└── web.yml
26 directories, 17 files

 (2)执行web的playbook:

[17:15 root@centos6.8/etc/ansible]# ansible-playbook  web.yml
PLAY [web] ********************************************************************
GATHERING FACTS *************************************************************** 
ok: [10.1.252.235]
ok: [10.1.252.215]
TASK: [web | install web pakgs] *********************************************** 
ok: [10.1.252.215] => (item=httpd,php,php-mysql)
ok: [10.1.252.235] => (item=httpd,php,php-mysql)
TASK: [web | config the web] ************************************************** 
ok: [10.1.252.215]
ok: [10.1.252.235]
TASK: [web | install wordpress] *********************************************** 
changed: [10.1.252.235]
changed: [10.1.252.215]
TASK: [web | restart the service] ********************************************* 
ok: [10.1.252.215]
ok: [10.1.252.235]
PLAY RECAP ******************************************************************** 
10.1.252.215               : ok=5    changed=1    unreachable=0    failed=0   
10.1.252.235               : ok=5    changed=1    unreachable=0    failed=0         
        (3)执行mysql的playbook:
[18:52 root@centos6.8/etc/ansible]# ansible-playbook  mysql.yml
PLAY [mysql] ******************************************************************
GATHERING FACTS *************************************************************** 
ok: [10.1.252.36]
TASK: [mysql | install mysql] ************************************************* 
ok: [10.1.252.36]
TASK: [mysql | copy sql file] ************************************************* 
ok: [10.1.252.36]
TASK: [mysql | start mysql service] ******************************************* 
ok: [10.1.252.36]
TASK: [mysql | config mysql] ************************************************** 
skipping: [10.1.252.36]
ok: [10.1.252.36]
PLAY RECAP ******************************************************************** 
10.1.252.36                : ok=4    changed=0    unreachable=0    failed=0 

(3)执行mysql的playbook:

[18:52 root@centos6.8/etc/ansible]# ansible-playbook  mysql.yml
PLAY [mysql] ******************************************************************
GATHERING FACTS ***************************************************************
ok: [10.1.252.36]
TASK: [mysql | install mysql] *************************************************
ok: [10.1.252.36]
TASK: [mysql | copy sql file] *************************************************
ok: [10.1.252.36]
TASK: [mysql | start mysql service] *******************************************
ok: [10.1.252.36]
TASK: [mysql | config mysql] **************************************************
skipping: [10.1.252.36]
ok: [10.1.252.36]
PLAY RECAP ********************************************************************
10.1.252.36                : ok=4    changed=0    unreachable=0    failed=0

 (4)执行nginx的playbook:

[18:53 root@centos6.8/etc/ansible]# ansible-playbook nginx.yml
PLAY [nginx] ******************************************************************
GATHERING FACTS ***************************************************************
ok: [10.1.249.75]
ok: [10.1.253.107]
TASK: [nginx | install keepalived] ********************************************
ok: [10.1.253.107]
ok: [10.1.249.75]
TASK: [nginx | copy nginx] ****************************************************
changed: [10.1.249.75]
changed: [10.1.253.107]
TASK: [nginx | install nginx] *************************************************
ok: [10.1.249.75]
ok: [10.1.253.107]
TASK: [nginx | delete the nginx pkg] ******************************************
changed: [10.1.249.75]
changed: [10.1.253.107]
TASK: [nginx | config nginx&keepalived] ***************************************
ok: [10.1.249.75]
ok: [10.1.253.107]
TASK: [nginx | config nginx&keepalived] ***************************************
ok: [10.1.249.75]
ok: [10.1.253.107]
TASK: [nginx | start the service] *********************************************
ok: [10.1.253.107] => (item=keepalived)
ok: [10.1.249.75] => (item=keepalived)
ok: [10.1.253.107] => (item=nginx)
ok: [10.1.249.75] => (item=nginx)
PLAY RECAP ********************************************************************
10.1.249.75                : ok=8    changed=2    unreachable=0    failed=0  
10.1.253.107               : ok=8    changed=2    unreachable=0    failed=0  

结果如下

ansible部署KeepAlived动态站点

所遇到的问题:在每个task中的name任务中不能有过多的任务,必须要分为多个步骤进行,如此例中的copy nginx然后再yum nginx,不能写在同一个name中,否则会报错!此外,copy的模块拷贝目录时注意最后的“/” 问题。

原创文章,作者:renjin,如若转载,请注明出处:http://www.178linux.com/78843

(0)
上一篇 2015-05-13 18:42
下一篇 2015-05-14 14:00

相关推荐

  • rpm包及rmp命令详解

    一、软件运行环境           API: Application Programming Interface              国际标准&nbs…

    Linux干货 2016-08-22
  • 加密算法、https、dns(主从、视图)

    第九周 2018/1/29

    2018-01-29
  • Linux基本命令

    基本命令 1、用户 1、  root  :超级用户 2、  普通用户(生产环境一般使用普通用户) 2、终端terminal 1、  设备终端 :鼠标、显示器 2、  物理终端 (/dev/console): 1.       控制台 3、 …

    Linux干货 2017-04-17
  • Hadoop hdfs 分布式文件系统

    Hadoop简介:一个分布式系统基础架构,由Apache基金会开发。用户可以在不了解分布式底层细节的情况下,开发分布式程序。充分利用集群的威力高速运算和存储。Hadoop实现了一个分布式文件系统(Hadoop Distributed File System),简称HDFS。HDFS有着高容错性的特点,并且设计用来部署在低廉的(low-cost)硬件…

    Linux干货 2015-08-05
  • linux磁盘分区格式化基本操作

    磁盘分区 分区格式的两种选择:MBR和GPT 分区命令: parted的操作都是实时生效的,小心使用,主要是用于大于2T硬盘,支持MBR和GPT两种格式。 用法:parted [选项]… [设备[命令[参数]…]…] parted /dev/sdb mklabelgpt|msdos //选择分区格式 parted…

    Linux干货 2017-04-24
  • 设计模式 ( 十六 ) 观察者模式Observer(对象行为型)

    1.概述 一些面向对象的编程方式,提供了一种构建对象间复杂网络互连的能力。当对象们连接在一起时,它们就可以相互提供服务和信息。 通常来说,当某个对象的状态发生改变时,你仍然需要对象之间能互相通信。但是出于各种原因,你也许并不愿意因为代码环境的改变而对代码做大的修改。也许,你只想根据你的具体应用环境而改进通信代码。或者,你只想简单的重新构造通信代码来避免类和类…

    Linux干货 2015-07-24