nginx+keepalived 高可用负载均衡

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1. #运行用户
2. user nginx nginx;
3. #启动进程
4. worker_processes 2;
5. #全局错误日志及PID文件
6. error_log logs/error.log notice;
7. pid logs/nginx.pid;
8. #工作模式及每个进程连接数上限
9. events {
10. use epoll;
11. worker_connections 1024; #所以nginx支持的总连接数就等于worker_processes * worker_connections
12. }
13. #设定http服务器,利用它的反向代理功能提供负载均衡支持
14. http {
15. #设定mime类型
16. include mime.types; #这个是说nginx支持哪些多媒体类型，可以到conf/mime.types查看支持哪些多媒体
17. default_type application/octet-stream; #默认的数据类型
18. #设定日志格式
20. log_format main '$remote_addr - $remote_user [$time_local] '
21. '"$request" $status $bytes_sent '
22. '"$http_referer" "$http_user_agent" '
23. '"$gzip_ratio"';
25. log_format download '$remote_addr - $remote_user [$time_local] '
26. '"$request" $status $bytes_sent '
27. '"$http_referer" "$http_user_agent" '
28. '"$http_range" "$sent_http_content_range"';
29. #设定请求缓冲
30. client_header_buffer_size 1k;
31. large_client_header_buffers 4 4k;
32. #开启gzip模块
33. #gzip on;
34. #gzip_min_length 1100;
35. #gzip_buffers 4 8k;
36. #gzip_types text/plain;
37. #output_buffers 1 32k;
38. #postpone_output 1460;
39. #设定access log
40. access_log logs/access.log main;
41. client_header_timeout 3m;
42. client_body_timeout 3m;
43. send_timeout 3m;
44. sendfile on;
45. tcp_nopush on;
46. tcp_nodelay on;
47. keepalive_timeout 65;
48. #设定负载均衡的服务器列表
50. upstream mysvr {
51. #weigth参数表示权值,权值越高被分配到的几率越大
52. server 192.168.207.129:80 weight=5;
53. server 192.168.207.130:8080 weight=5;
54. server 192.168.207.131:8080 weight=5;
55. }
56. server { #这个是设置web服务的，监听8080端口
57. listen 8080;
58. server_name 192.168.207.131; #这个根据系统ip变化
59. index index.html index.htm;
60. root /var/www/html;
61. #error_page 500 502 503 504 /50x.html;
62. #location = /50x.html {
63. # root html;
64. #}
65. }
66. #设定虚拟主机
67. server {
68. listen 80;
69. server_name 192.168.207.140; #这里是VIP
70. #charset gb2312;
71. #设定本虚拟主机的访问日志
72. access_log logs/three.web.access.log main;
73. #如果访问 /img/*, /js/*, /css/* 资源,则直接取本地文件,不通过squid
74. #如果这些文件较多,不推荐这种方式,因为通过squid的缓存效果更好
75. #location ~ ^/(img|js|css)/{
76. # root /data3/Html;
77. # expires 24h;
78. #}
79. #对 "//m.sbmmt.com/m/" 启用负载均衡
80. location / {
81. proxy_pass http://mysvr; #以这种格式来使用后端的web服务器
82. proxy_redirect off;
83. proxy_set_header Host $host;
84. proxy_set_header X-Real-IP $remote_addr;
85. proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
86. client_max_body_size 10m;
87. client_body_buffer_size 128k;
88. proxy_connect_timeout 90;
89. proxy_send_timeout 90;
90. proxy_read_timeout 90;
91. proxy_buffer_size 4k;
92. proxy_buffers 4 32k;
93. proxy_busy_buffers_size 64k;
94. proxy_temp_file_write_size 64k;
95. }
96. #设定查看Nginx状态的地址 ，在安装时要加上--with-http_stub_status_module参数
97. location /NginxStatus {
98. stub_status on;
99. access_log on;
100. auth_basic "NginxStatus";
101. auth_basic_user_file conf/htpasswd; #设置访问密码，htpasswd -bc filename username password
102. }
103. }
104. }

3.自定义keepalived配置文件