docker 搭建 nginx负载均衡
本文描述如何在一台机器上搭建nginx负载均衡，我将会启动3个nginx的docker，分别是1台前置nginx负责分发，后面2台负责处理请求。
首先我切换到/usr/local/docker/文件夹下，这个文件夹是专门用来做docker映射文件夹用的，docker里的重要的文件夹会映射到这里，在这里执行
mkdir nginx
mkdir nginx01
mkdir nginx02
nginx下存储的是前置nginx的文件
nginx01和nginx02负责存储后边两台nginx服务器的文件
《一、前置nginx配置以及启动》
切换到/usr/local/docker/nginx下
然后执行
mkdir -p conf html logs
切换到conf
vim nginx.conf
user nginx; worker_processes auto; error_log /var/log/nginx/error.log; pid /run/nginx.pid; # Load dynamic modules. See /usr/share/nginx/README.dynamic. include /usr/share/nginx/modules/*.conf; events { worker_connections 1024; } http { 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; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; include /etc/nginx/mime.types; default_type application/octet-stream; # Load modular configuration files from the /etc/nginx/conf.d directory. # See http://nginx.org/en/docs/ngx_core_module.html#include # for more information. include /etc/nginx/conf.d/*.conf; server { listen 80 default_server; root /usr/share/nginx/html; # Load configuration files for the default server block. include /etc/nginx/default.d/*.conf; location / { proxy_pass http://pic; } error_page 404 /404.html; location = /40x.html { } error_page 500 502 503 504 /50x.html; location = /50x.html { } } upstream pic{ server 172.26.200.89:8088 weight=5; server 172.26.200.89:8089 weight=5; } }
配置好以后，保存conf文件
然后启动这个前置nginx
docker run --name mynginx -d -p 82:80 -v /usr/local/docker/nginx/conf/nginx.conf:/etc/nginx/nginx.conf -v /usr/local/docker/nginx/logs:/var/log/nginx -d nginx
《二、nginx01配置以及启动》
切换到/usr/local/docker/nginx01/文件夹
执行
mkdir -p conf html logs
然后切换到conf文件夹
vim nginx.conf
user nginx; worker_processes auto; error_log /var/log/nginx/error.log; pid /run/nginx.pid; # Load dynamic modules. See /usr/share/nginx/README.dynamic. include /usr/share/nginx/modules/*.conf; events { worker_connections 1024; } http { 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; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; include /etc/nginx/mime.types; default_type application/octet-stream; # Load modular configuration files from the /etc/nginx/conf.d directory. # See http://nginx.org/en/docs/ngx_core_module.html#include # for more information. include /etc/nginx/conf.d/*.conf; server { listen 8088; root /usr/share/nginx/html; index index.html index.htm; } }
然后保存配置文件，退出
切换到/usr/local/docker/nginx01/html/文件夹下
vim index.html，简单写点东西，如下
8088 port nginx
然后启动docker
docker run --name mynginx01 -d -p 8088:8088 -v /usr/local/docker/nginx01/conf/nginx.conf:/etc/nginx/nginx.conf -v /usr/local/docker/nginx01/logs:/var/log/nginx -v /usr/local/docker/nginx01/html:/usr/share/nginx/html -d nginx
《三、nginx02配置以及启动》
切换到/usr/local/docker/nginx02/文件夹
执行
mkdir -p conf html logs
然后切换到conf文件夹
vim nginx.conf
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
# Load dynamic modules. See /usr/share/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;
events {
worker_connections 1024;
}
http {
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;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
include /etc/nginx/mime.types;
default_type application/octet-stream;
# Load modular configuration files from the /etc/nginx/conf.d directory.
# See http://nginx.org/en/docs/ngx_core_module.html#include
# for more information.
include /etc/nginx/conf.d/*.conf;
server {
listen 8089;
root /usr/share/nginx/html;
index index.html index.htm;
}
}
然后保存配置文件，退出
切换到/usr/local/docker/nginx02/html/文件夹下
vim index.html，简单写点东西，如下
8089 port nginx
然后启动docker
docker run --name mynginx02 -d -p 8089:8089 -v /usr/local/docker/nginx02/conf/nginx.conf:/etc/nginx/nginx.conf -v /usr/local/docker/nginx02/logs:/var/log/nginx -v /usr/local/docker/nginx02/html:/usr/share/nginx/html -d nginx
-------------------------------分割线-----------------------
至此，前置nginx和两台后置nginx都启动了，我们测试一下
在命令行执行
curl 127.0.0.1:82
如下图：
可以看到，由于我们前置nginx上的负载策略是各百分之50，所以出现了第一次请求发送到8088的nginx，第二次请求发送到8089的nginx，第三次又到8088，第四次8089。。。。。。
大家仅供参考，谢谢阅读全文。
