docker容器Nginx配置upstream实现负载均衡

github

目录

├── baseimg                                   基础镜像
│   └── Dockerfile
├── docker-compose                            docker-compose
│   ├── docker-compose.yml
│   ├── nginx-php-sites-available
│   │   └── default
│   └── nginx-sites-available
│       └── default
├── nginx                                      nginx镜像
│   ├── Dockerfile
│   ├── sites-enabled
│   └── supervisor_nginx.conf
├── nginx-php                                  nginx+php-fpm镜像
│   ├── Dockerfile
│   ├── sites-enabled
│   ├── supervisor_nginx.conf
│   └── supervisor_php5-fpm.conf

baseimg基础镜像

Dockerfile

FROM debian

MAINTAINER huangyaokui <451722619@qq.com>

ENV TERM xterm
ENV TZ "Asia/Shanghai"

RUN apt-get update && \
    apt-get install -qqy vim supervisor && \
    rm -rf /var/lib/apt/lists/*

EXPOSE  22

ENTRYPOINT ["/usr/bin/supervisord", "-n", "-c", "/etc/supervisor/supervisord.conf"]  

docker build -t='debian/baseimg:0.1' .

---

nginx镜像

FROM debian/baseimg:0.1

MAINTAINER kui <451722619@qq.com>

RUN apt-get update && \
 apt-get install -y nginx && \
 rm -rf /var/lib/apt/lists/*

EXPOSE 80 443

ADD supervisor_nginx.conf /etc/supervisor/conf.d/nginx.conf

VOLUME ["/var/www/html", "/etc/nginx/sites-enabled"]

docker build -t='debian/nginx:0.1' .

---

nginx+php-fpm镜像

FROM debian/nginx:0.1

MAINTAINER kui <451722619@qq.com>

RUN apt-get update && \
 apt-get install -y php5 php5-fpm php5-memcache php5-mysql && \
 rm -rf /var/lib/apt/lists/* 

ADD supervisor_php5-fpm.conf /etc/supervisor/conf.d/php5-fpm.conf

VOLUME ["/etc/php5/fpm/pool.d"]

docker build -t='debian/nginx-php:0.1' .

---

docker-compose

web1:
    image: debian/nginx-php:0.1
    volumes:
        - /var/www/html:/var/www/html
        - /home/vagrant/cjw-Docker/docker-compose/nginx-php-sites-available:/etc/nginx/sites-enabled
web2:
    image: debian/nginx-php:0.1
    volumes:
        - /var/www/html:/var/www/html
        - /home/vagrant/cjw-Docker/docker-compose/nginx-php-sites-available:/etc/nginx/sites-enabled
nginx:
    image: debian/nginx:0.1
    ports:
        - "80:80"
    links:
        - web1:web1
        - web2:web2
    volumes:
        - /home/vagrant/cjw-Docker/docker-compose/nginx-sites-available:/etc/nginx/sites-enabled

---

nginx容器的upstream

upstream web{
    server web1;
    server web2;
}

server {
    listen 80 default_server;
    listen [::]:80 default_server;

    root /var/www/html;

    # Add index.php to the list if you are using PHP
    index index.html index.htm index.php index.nginx-debian.html;

    server_name _;

    location / {
        try_files $uri $uri/ =404;
    }

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #
    location ~ \.php$ {
        proxy_pass http://web; 
    }
}

nginx-php的nginx配置

server {
    listen 80 default_server;
    listen [::]:80 default_server;

    root /var/www/html;
    index index.html index.htm index.php index.nginx-debian.html;

    server_name _;

    location / {
        try_files $uri $uri/ =404;
    }

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #
    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
    #
    #   # With php5-cgi alone:
    #   fastcgi_pass 127.0.0.1:9000;
    #   # With php5-fpm:
        fastcgi_pass unix:/var/run/php5-fpm.sock;
    }
}

启动容器

docker-compose up -d

验证

#/var/www/html/index.php
<?php
echo $_SERVER['SERVER_ADDR'];

访问 localhost/index.php
简单的nginx的负载均衡

缺点

nginx的upstream实现的负载均衡，容易出现单点故障。