架构图
架构图
hosts
[nginx]
192.168.65.134
192.168.65.135
[php]
192.168.65.134
192.168.65.135
[mysql]
192.168.65.134
192.168.65.135
[haproxy]
192.168.65.136
Tree
my_haproxy_lamp/
├── group_vars
│ ├── all
│ ├── haproxy
│ └── mysql
├── hosts
├── roles
│ ├── base
│ │ ├── tasks
│ │ │ └── main.yml
│ │ └── templates
│ │ ├── CentOS-Base.repo
│ │ └── epel-7.repo
│ ├── haproxy
│ │ ├── tasks
│ │ │ └── main.yml
│ │ └── templates
│ │ ├── haproxy.cfg.j2
│ │ └── haproxy.cfg.j2.bak
│ ├── mysql
│ │ ├── tasks
│ │ │ └── main.yml
│ │ └── templates
│ │ └── my.cnf.j2
│ ├── nginx
│ │ ├── handlers
│ │ │ └── main.yml
│ │ ├── tasks
│ │ │ └── main.yml
│ │ └── templates
│ │ ├── index.php
│ │ └── nginx.conf.j2
│ └── php
│ └── tasks
│ └── main.yml
└── site.yml
- 以上是整个的目录结构
site.yml
---
- name: Modify the yum
hosts: all
remote_user: root
roles:
- base
- name: install the nginx
hosts: nginx
remote_user: root
roles:
- nginx
- name: install the php
hosts: nginx
remote_user: root
roles:
- php
- name: install the mariadb
hosts: mysql
remote_user: root
roles:
- mysql
- name: install the haproxy
hosts: haproxy
remote_user: root
roles:
- haproxy
一共四个角色
- base 安装配置yum源
- nginx 安装配置nginx
- mysql 安装配置mysql
- haproxy 安装配置HAproxy
base角色
sudo wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
sudo wget http://mirrors.aliyun.com/repo/epel-7.repo
- 获取阿里源
- 放到templates目录下
task/main.yml
---
- name: Copy the yum repo to the remote hosts
template: src={{item}} dest=/etc/yum.repos.d/{{item}}
with_items:
- CentOS-Base.repo
- epel-7.repo
nginx角色
task/main.yml
---
- name: Install nginx
yum: name=nginx state=present
- name: Copy nginx configuration
template: src=nginx.conf.j2 dest=/etc/nginx/nginx.conf
notify: restart nginx #通知handler执行任务
- name: Copy php file to nginx web root
template: src=index.php dest=/usr/share/nginx/html/index.php
- 通知handler执行任务
- 拷贝nginx配置文件和主页文件到远程主机
handlers/main.yml
---
- name: restart nginx
service: name=nginx state=restarted
templates/index.php
{{ ansible_default_ipv4.get('address') }}
- 可以通过ansible all -m setup获得具体主机数据
- 作用为当HAproxy后端代理不同的nginx服务器显示不同的ip地址
mysql角色
---
- name: install mysql
yum: name={{item}} state=installed
with_items:
- mariadb-server
- MySQL-python
- name: create mysql configuration file
template: src=my.cnf.j2 dest=/etc/my.cnf
- name: start mariadb service
service: name=mariadb state=started
templates/my.cnf.j2
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
port={{ mysql_port }}
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mariadb/mysqld.pid
- 主要是mysql_port
haproxy 角色
- name: install haproxy
yum: name=haproxy state=present
- name: configure the haproxy cnf file with hosts
template: src=haproxy.cfg.j2 dest=/etc/haproxy/haproxy.cfg
- name: restart haproxy
service: name=haproxy state=restarted
templates/haproxy.cfg.j2
#---------------------------------------------------------------------
# Example configuration for a possible web application. See the
# full configuration options online.
#
# http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
# to have these messages end up in /var/log/haproxy.log you will
# need to:
#
# 1) configure syslog to accept network log events. This is done
# by adding the '-r' option to the SYSLOGD_OPTIONS in
# /etc/sysconfig/syslog
#
# 2) configure local2 events to go to the /var/log/haproxy.log
# file. A line like the following can be added to
# /etc/sysconfig/syslog
#
# local2.* /var/log/haproxy.log
#
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode {{mode}}
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend main *:{{listenport}}
stats uri /haproxy
acl url_static path_beg -i /static /images /javascript /stylesheets
acl url_static path_end -i .jpg .gif .png .css .js
use_backend static if url_static
default_backend app
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend static
balance {{balance}}
server static 127.0.0.1:8080 check
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend app
balance {{balance}}
{% for host in groups['nginx'] %}
server {{hostvars[host]['inventory_hostname']}} {{host}}:{{nginx_port}}
{% endfor %}
- 那什么的鬼的static我也不懂
- 之后是一个jinja2语法循环在hosts里的nginx主机，然后hostvars[host]可以得到这个主机的变量，然后使用inventory_hostname变量，结果是在这里可以获取到主机ip，后面的{{host}}也是会获得到主机ip
group_vars
这个目录下放着是每个主机组的变量，和角色名可以不同，但是一定要和主机组相同。
- all
---
nginx_port: 8089
all表示所有的主机组
- haproxy
---
mode: http #这个是HAproxy采用http模式，还是tcp模式，还是xx模式
listenport: 80 #监听前端访问端口
balance: roundrobin #使用轮询的方式负载均衡，也可以使用别的方式
haproxy表示只有这个主机组可以使用
haproxy官方文档地址了解一下？
- mysql
---
mysqlservice: mysqld
mysql_port: 3306
mysql表示只有这个mysql主机组可以使用
结果
执行
ansible-playbook -i hosts site.yml
最后结果
[root@node04 my_haproxy_lamp]# curl localhost
192.168.65.134
[root@node04 my_haproxy_lamp]# curl localhost
192.168.65.135
[root@node04 my_haproxy_lamp]# curl 192.168.65.136
192.168.65.134
[root@node04 my_haproxy_lamp]# curl 192.168.65.136
192.168.65.135
总结
- 还有mysql的数据库创建角色，和角色授权没弄，有空搞搞。
- site.yml为入口，task目录为任务目录，handler目录为响应notify的目录，templates目录为template模块用的目录，一般放jinja2文件（j2结尾的），也可以用file目录。
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