nginx负载均衡一部署（ansible操作），nginxansible

• 环境：
• 一、部署ansible环境
  • 1.安装ansible
  • 2.配置免秘钥
  • 3.配置ansible主机清单
• 二、nginx环境部署
  • 1.给两台client安装httpd服务
  • 2.关闭所有虚拟机的防火墙
  • 3.发送index.html首页到client
• 三、安装nginx
  • 1.上传nginx镜像到lb两台虚拟机
  • 2.安装依赖
  • 3.解压编译安装
  • 4.创建目录与软链接
  • 5.设置环境变量，启动nginx

环境：

四台机器（lb-01使用ansible管理）
lb-01---10.0.0.10
lb-02---10.0.0.11
clent-01---10.0.0.12
clent-02---10.0.0.13

一、部署ansible环境

1.安装ansible

[root@lb-01 ~]# yum install epel-release -y
[root@lb-01 ~]# yum install ansible -y

2.配置免秘钥

[root@lb-01 ~]# ssh-keygen
[root@lb-01 ~]# for ip in 10 11 12 13;do ssh-copy-id -i /root/.ssh/id_rsa.pub 10.0.0.$ip;done 

3.配置ansible主机清单

[root@lb-01 ~]# cat /etc/ansible/hosts
[lb]
10.0.0.10
10.0.0.11
[client]
10.0.0.12
10.0.0.13
[root@lb-01 ~]# ansible all -m ping                           
10.0.0.11 | SUCCESS => {
    "changed": false, 
    "ping": "pong"
}
10.0.0.12 | SUCCESS => {
    "changed": false, 
    "ping": "pong"
}
10.0.0.13 | SUCCESS => {
    "changed": false, 
    "ping": "pong"
}
10.0.0.10 | SUCCESS => {
    "changed": false, 
    "ping": "pong"
}

二、nginx环境部署

1.给两台client安装httpd服务

[root@lb-01 ~]# ansible client -m yum -a "name=httpd state=present"
[root@lb-01 ~]# ansible client -m service -a "name=httpd state=started enabled=yes"

2.关闭所有虚拟机的防火墙

[root@lb-01 ~]# ansible all -m service -a "name=iptables state=stopped enabled=no"
[root@lb-01 ~]# sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/sysconfig/selinux 
[root@lb-01 ~]# ansible all -m shell -a "setenforce 0"  
[root@lb-01 ~]# ansible all -m copy -a "src=/etc/sysconfig/selinux dest=/etc/sysconfig/selinux"

3.发送index.html首页到client

[root@lb-01 test]# cat httpd.index.html 
{{ansible_default_ipv4.address}} ###调用IP，这里取出来的是client两个虚拟机的IP

[root@lb-01 test]# cat http.yml 
---
-  hosts: client
   tasks:
     - name: scp index.html
       template: src=/test/httpd.index.html dest=/var/www/html/index.html
[root@lb-01 test]# ansible-playbook http.yml 
查看效果
[root@lb-01 test]# ansible client -m shell -a "cat /var/www/html/index.html"
10.0.0.12 | SUCCESS | rc=0 >>
10.0.0.12 #/var/www/html/index.html 文件里的内容

10.0.0.13 | SUCCESS | rc=0 >>
10.0.0.13 #/var/www/html/index.html 文件里的内容
[root@lb-01 test]# curl 10.0.0.12
10.0.0.12
[root@lb-01 test]# curl 10.0.0.13
10.0.0.13

三、安装nginx

1.上传nginx镜像到lb两台虚拟机

[root@lb01 ~]# ansible lb -m shell -a "ls -lh /root/nginx-1.6.2.tar.gz"
10.0.0.11 | SUCCESS | rc=0 >>
-rw-r--r-- 1 root root 786K Aug 12 15:17 /root/nginx-1.6.2.tar.gz

10.0.0.10 | SUCCESS | rc=0 >>
-rw-r--r-- 1 root root 786K Mar 24  2015 /root/nginx-1.6.2.tar.gz

2.安装依赖

[root@lb01 test]# ansible lb -m yum -a "name=gcc state=present"
[root@lb01 test]# ansible lb -m yum -a "name=pcre-devel state=present"
[root@lb01 test]# ansible lb -m yum -a "name=openssl-devel state=present"

3.解压编译安装

[root@lb01 test]# cat nginx.yml                 
---
- hosts: lb###指定模块，这个模块包含了lb两台虚拟机
  tasks:
  - name: add user ###添加nginx用户
    user: name=nginx group=nginx createhome=no shell=/sbin/nologin
  - name: tar nginx ###解压nginx
    unarchive: src=/root/nginx-1.6.2.tar.gz dest=/root
  - name: make install###编译安装
    shell: chdir=/root/nginx-1.6.2  ./configure --user=nginx \
    --group=nginx --prefix=/usr/local/nginx-1.6.2 \
    --with-http_stub_status_module --with-http_ssl_module \
    && make && make install
===>注：ansible-plabook里不能有斜线 需要删掉
[root@lb01 test]# ansible-playbook nginx.yml    

4.创建目录与软链接

[root@lb01 ~]# ansible lb -m file -a "path=/application state=directory"
[root@lb01 ~]# ansible lb -m shell -a "ln -s /usr/local/nginx-1.6.2 /application/"

5.设置环境变量，启动nginx

[root@lb01 ~]# ansible lb -m shell -a "cp /application/nginx-1.6.2/sbin/nginx /usr/local/sbin/“
[root@lb01 ~]# ansible lb -m shell -a "nginx"
[root@lb01 ~]# ansible lb -m shell -a "netstat -lntup|grep nginx"
10.0.0.11 | SUCCESS | rc=0 >>
tcp        0      0 0.0.0.0:80                  0.0.0.0:*                   LISTEN      8570/nginx          

10.0.0.10 | SUCCESS | rc=0 >>
tcp        0      0 0.0.0.0:80                  0.0.0.0:*                   LISTEN      14554/nginx