docker+nginx实现负载均衡
配置nginx配置文件(配置文件运行时是会加载到docker进程中)
先建立nginx相关文件和目录,对应下面启动命令中的挂载位置,把主配置文件nginx.conf放到对应位置“/etc/docker/myNginx/nginx.conf”,把子配置文件“default.conf”放到“/etc/docker/myNginx/conf.d”目录下
负载nginx配置文件如下:
nginx.conf
user root; worker_processes 1; error_log /var/log/nginx/error.log warn; pid /var/run/nginx.pid; events { worker_connections 1024; } http { include /etc/nginx/mime.types; default_type application/octet-stream; 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; keepalive_timeout 65; autoindex on; #gzip on; include /etc/nginx/conf.d/*.conf; client_max_body_size 100M; client_header_buffer_size 128k; large_client_header_buffers 4 128k; }
default.conf(将x.x.x.x换为服务外网地址)
upstream myserver { server x.x.x.x:8004;#(此处填外网地址) server x.x.x.x:8005; server x.x.x.x:8006; } server { listen 80; location / { proxy_pass http://myserver; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection keep-alive; proxy_set_header Host $host; proxy_cache_bypass $http_upgrade; } }
拉取nginx官方的镜像
docker pull nginx
docker 部署运行nginx容器
docker run --name myNginx -d -p 80:80 -v /usr/docker/myNginx/html:/usr/share/nginx/html -v /etc/docker/myNginx/nginx.conf:/etc/nginx/nginx.conf:ro -v /etc/docker/myNginx/conf.d:/etc/nginx/conf.d nginx
命令说明:
(1)第一个“-v”,是项目位置,把项目放到挂载到的目录下即可;
(2)第二个“-v”,是挂载的主配置文件"nginx.conf",注意"nginx.conf"文件内有一行"include /etc/nginx/conf.d/*.conf;",这个include指向了子配置文件的路径,此处注意include后所跟的路径一定不要出错。
(3)第三个“-v”,把docker内子配置文件的路径也挂载了出来,注意要与(2)中include指向路径一致
(4)重点强调一下,nginx.conf是挂载了一个文件(docker是不推荐这样用的),conf.d挂载的是一个目录
nginx配置文件更新后,只需要重启docker中的nginx容器就可以加载更新后的配置文件了
docker restart myNginx