标签:strong oca === 添加 cond oct www. policy ica
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2018/11/11_第1次修改 ccb_warlock
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之前查过负载均衡的相关资料,由于资金所限无法直接
一、前提条件
- 环境中已经部署了docker swarm(http://www.cnblogs.com/straycats/p/8978135.html)
- 最好也部署了portainer(http://www.cnblogs.com/straycats/p/8978201.html)
- 部署nginx容器的服务器IP:192.168.12.7
- 业务服务器IP:192.168.13.1、192.168.13.2、192.168.13.3
- 默认swarm创建了network:my-net
二、创建nginx容器
2.1 创建目录
mkdir -p /usr/docker-vol/nginx/conf/conf.d
2.2 编辑nginx.conf
vi /usr/docker-vol/nginx/conf/nginx.conf
# 添加下面的内容到nginx.conf中,wq保存。
user nginx; worker_processes auto; pid /run/nginx.pid; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; keepalive_timeout 65; sendfile on; tcp_nopush on; gzip on; gzip_disable "msie6"; }
2.3 编辑www.conf
vi /usr/docker-vol/nginx/conf/conf.d/www.conf
# 添加下面的内容到nginx配置文件内,wq保存。
upstream abtest{ # 设置负载的权重比为1:1:2(即将本服务器1/4的请求转到13.1的8080端口,1/4的请求转到13.1的7777端口,1/2的请求转到13.2的8080端口,13.3当前不会收到请求,13.4在其他3个server忙的时候才会收到请求) server 192.168.13.1:8080 weight=1; server 192.168.13.1:7777 weight=1;# 也支持伪集群的负载均衡 server 192.168.13.2:8080 weight=2; server 192.168.13.3:8080 weight=3 down;# down表示该服务器当前不进行负载 server 192.168.13.4:8080 weight=3 backup;# down表示该服务器当前不进行负载 } server { listen 80; access_log off; error_log off; location = /abc.txt { proxy_pass http://abtest/abc.txt; client_max_body_size 10m; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header REMOTE-HOST $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } }
2.4 启动容器
# 登录protainer,将下面的内容添加到一个新的栈vedi-stack中,wq保存。
version: ‘3.6‘ services: nginx: image: nginx:1.14.0-alpine environment: - TZ=Asia/Shanghai volumes: - /usr/docker-vol/nginx/conf/nginx.conf:/etc/nginx/nginx.conf - /usr/docker-vol/nginx/conf/conf.d:/etc/nginx/conf.d deploy: replicas: 1 restart_policy: condition: any resources: limits: cpus: "1" memory: 500M update_config: parallelism: 1 delay: 5s monitor: 10s max_failure_ratio: 0.1 order: start-first ports: - 80:80 networks: - my-net networks: my-net: external: true
由于nginx做了负载均衡,访问http://192.168.12.7/abc.txt会负载到http://192.168.13.1:8080/abc.txt、http://192.168.13.1:7777/abc.txt、http://192.168.13.2:8080/abc.txt
PS.这里特别说明,upstream在做负载均衡时不支持灵活配置端口,所以不能写成下面的格式:
upstream abtest{ server 192.168.13.1 weight=1; server 192.168.13.2 weight=2; server 192.168.13.3 weight=3 down; server 192.168.13.4 weight=3 backup; } server { listen 80; access_log off; error_log off; location = /abc.txt { proxy_pass http://abtest:8080/abc.txt; client_max_body_size 10m; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header REMOTE-HOST $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } }
如果写成上面的格式,nginx的启动后会提示异常:
nginx: [emerg] upstream "abtest" may not have port 8080 in /etc/nginx/conf.d/www.conf:14
参考资料:
1.https://www.cnblogs.com/ChoviWu/p/9004725.html
2.https://www.cnblogs.com/zhoading/p/8036205.html
3.https://www.cnblogs.com/wzjhoutai/p/6932007.html
标签:strong oca === 添加 cond oct www. policy ica
原文地址:https://www.cnblogs.com/straycats/p/9944412.html