使用ansible一键部署HAproxy+LNMP
----------------------------------------------一、环境
二、概述
三、目录结构及角色
1.目录结构
2.site.yml
3.hosts
4.base
5.nginx
6.php
7.mysql
8.haproxy
9.vars
四、语法检查
五、执行
六、测试
----------------------------------------------
一、环境
1.操作系统版本
# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core) 2.ansible版本
# ansible --version
ansible 2.6.1
config file = /etc/ansible/ansible.cfg
configured module search path =
ansible python module location = /usr/lib/python2.7/site-packages/ansible
executable location = /usr/bin/ansible
python version = 2.7.5 (default, Nov 20 2015, 02:00:19)
二、概述
HAproxy是一款卓越的提供高可用、负载均衡以及基于TCP和HTTP应用的代理软件，目前很多公司使用它做web集群和cache集群的负载均衡及代理；
LNMP是Linux+nginx+mysql+php的首字母简称，这种架构很容易实现跨主机的横向和纵向扩展，可快速组建一个庞大的web集群系统；
HAproxy代理和负载我们的nginx和php；
nginx和php提供web服务；
mysql提供数据存储服务。
http://s1.运维网.com/images/20180721/1532158298238193.png
三、目录结构及角色
1.目录结构
haproxy_lnmp
├── group_vars
│ ├── all
│ ├── haproxy
│ └── mysql
├── hosts
├── roles
│ ├── base
│ │ ├── tasks
│ │ │ └── main.yml
│ │ └── templates
│ │ ├── CentOS-Base.repo
│ │ └── epel.repo
│ ├── haproxy
│ │ ├── tasks
│ │ │ └── main.yml
│ │ └── templates
│ │ └── haproxy.cfg.j2
│ ├── mysql
│ │ ├── tasks
│ │ │ └── main.yml
│ │ └── templates
│ │ └── my.cnf.j2
│ ├── nginx
│ │ ├── tasks
│ │ │ └── main.yml
│ │ └── templates
│ │ ├── index.php.j2
│ │ └── nginx.conf.j2
│ └── php
│ └── tasks
│ └── main.yml
└── site.yml 2.入口文件site.yml
---
- name: modify the yum
gather_facts: no
hosts: all
remote_user: root
roles:
- base
- name: install the nginx
hosts: nginx
remote_user: root
roles:
- nginx
- name: install the mysql
gather_facts: no
hosts: mysql
remote_user: root
roles:
- mysql
- name: install the php
gather_facts: no
hosts: php
remote_user: root
roles:
- php
- name: install the haproxy
gather_facts: no
hosts: haproxy
remote_user: root
roles:
- haproxy 3.hosts列表
# cat hosts
192.168.228.3
192.168.228.4
192.168.228.3
192.168.228.4
192.168.228.4
192.168.228.5 4.base角色
4-1.main.yml
# cat roles/base/tasks/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.repo 4-2.yum源文件，可以使用163或清华大学等源
# ll roles/base/templates/
total 8
-rw-r--r-- 1 root root 1663 Jul 21 17:50 CentOS-Base.repo
-rw-r--r-- 1 root root970 Jul 21 17:50 epel.repo 5.nginx角色
5-1.main.yml
# cat roles/nginx/tasks/main.yml
---
- name: Install Nginx Package
yum: name=nginx state=present
- name: Copy Nginx.conf
template: src=nginx.conf.j2 dest=/etc/nginx/nginx.conf owner=root group=root mode=0644 validate='nginx -t -c %s'
- name: restart nginx
service: name=nginx state=restarted
- name: Copy php file to nginx web root
template: src=index.php.j2 dest=/usr/share/nginx/html/index.php 5-2.nginx配置文件是同版本的配置文件
# llroles/nginx/templates/
total 8
-rw-r--r-- 1 root root 34 Jul 21 19:21 index.php.j2
-rw-r--r-- 1 root root 2491 Jul 21 17:50 nginx.conf.j2 5-3.网页文件，获取nginx主机的IP
# cat roles/nginx/templates/index.php.j2
{{ansible_default_ipv4.address}} 6.php角色
# cat roles/php/tasks/main.yml
---
- name: install php
yum: name={{item}} state=installed
with_items:
- php-fpm
- php-mysql
- name: start php service
service: name=php-fpm state=started 7.mysql角色
7-1.main.yml
# cat roles/mysql/tasks/main.yml
---
- name: install mysql
yum: name={{item}} state=installed
with_items:
- mariadb-server
- MySQL-python
- name: start mariadb service
service: name=mariadb state=started
- name: create database
mysql_db: name={{database}} state=present
- name: create user
mysql_user: name={{user}} password={{password}} priv={{database}}.*:ALL host='%' state=present 7-2.mysql配置文件
# cat roles/mysql/templates/my.cnf.j2
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
port={{ mysql_port }}
log-error=/var/log/mysqld.log
pid-file=/var/run/mariadb/mysqld.pid 8.haproxy角色
8-1.main.yml
# cat roles/haproxy/tasks/main.yml
- 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 enabled=yes 8-2.haproxy配置文件
# cat roles/haproxy/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
#---------------------------------------------------------------------
frontendmain *:{{listenport}}
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 roundrobin
server static 127.0.0.1:8080 check
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend app
balance roundrobin
{% for host in groups['nginx'] %}
server {{hostvars['inventory_hostname']}} {{host}}:80}
{% endfor %} 9.vars
9-1.全局变量
# cat group_vars/all
---
ansible_ssh_pass: P@ssw0rd 9-2.haprxoy变量
# cat group_vars/haproxy
---
mode: http
listenport: 80 9-3.mysql变量
# cat group_vars/mysql
---
user: ansible
password: ansible
database: ansible
四、语法检查
只检查site.yml入口文件，不能检查各个角色下的main.yml
# ansible-playbook site.yml --syntax-check
playbook: site.yml
五、执行
# ansible-playbook -i hosts site.yml
六、测试
# curl 192.168.228.3
192.168.228.3
# curl 192.168.228.4
192.168.228.4
# curl 192.168.228.5
192.168.228.3
# curl 192.168.228.5
192.168.228.4
七、排错
在入口文件site.yml中的nginx角色没有使用gather_facts: no选项，是因为index.php中要获取主机的信息得到IP地址。
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